Image recording apparatus
lllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllll
USOO5105229A
Unlted States Patent [19]
[11] Patent Number:
Ozaki
[45]
[54]
'
IMAGE RECORDING APPARATUS
_
[75]
IIWBHIOR
_
5,105,229
Date of Patent:
Apr. 14, 1992
4,627,711 12/1986 Schron .............................. .. 355/206
_
4,763,160
l'hroshl 018111, Tokyo, Japan
8/1988
Honjo
.... .. 271/259 x
4,926,358 5/1990 Tani et a1. ..................... .. 355/311 x
[73] Ass1gnee: gang): Kabushiki Kaisha, Tokyo,
Primary Examiner__A_ T‘ Grimley
p
Assistant Examiner-Patrick Stanzione
[21] Appl. No.: 549,078
Attorney, Agent, or Firm-Fitzpatrick, Cella, Harper &
[22] Filed:
Scmm
[30]
Jul. 6, 1990
Foreign Application Priority Data
Jul. 7, 1989 [JP]
[57]
Japan ................................ .. 1-174069
5
ABSTRACT
An image recording apparatus includes a sheet feeding
umt for feeding a sheet to a recording pos1t1on, record
.......................................
22716099
ing unit for recording an image on the Sheet fed by the
‘ ' ' """"""""""""""""""" "in/263, $55006’
[58] r1614 61' Search ........................ .. 271/9 259 263-
sheet feeding unit, and jam detection unit for detecting
‘’ jamming in the apparatus Sheet hdding “it is Pm‘
355/206 20'7 208 311 313:’ 31,1 31-;
’ _
[56]
’
’
’
References cued
U.S. PATENT DOCUMENTS
tion unit to reuse the sheet, thereby using a recording
sheet ef?ciently even after a jam has occurred.
4,515,465
5/1985
4,521,102
6/1985 Motomura et a1. ........... .. 355/206 X
Miyoshi et a]. ............... .. 355/206 X
oR161NAL JAMMXNG
0ETEcT1oN MEANS
momamoN MEANS ’18
1
ZEEEéERESITENRGSING
’ Step 102
1c
?‘é‘iéi?‘éiiiié
,w
14 Claims, 10 Drawing Sheets
,1A
COPYING OPER T10N
TIMER CONTROL
MEANS
vided for holding a sheet fed by the sheet feeding unit in
accordance with a detection signal from the jam detec
1 1E
COPYING OPERATION
RESIARHNG MEANS
W” No
15 THE PREPARATION FOR
,1F
DISCHARGE
SELECTlON MEANS
<5£5E‘;§?‘6‘£€85£%?&"%>——
YES
L
Step 104
‘L
SHEET SIZE
IS THE SELEcTEo SHEET
512E CHANGED 2
YES
DISCRIMINATION MEANS
1:;
/1H
1K
35%;“
15 THE COPY START KEY
TURNED ON ?
COUNTER CONTROL MEANS
‘L
s‘ep1o7
$19105
COPY ToTAL
BLANK SHEET
221m,
2121125215,
COPY INSTRUCTION MEANS
I COPY PROCESSING |\Step1o8
END
US. Patent
Apr. 14, 1992
5,105,229
Sheet 1 of 10
FIG!
ORIGINAL .IAMMING
DETECTION MEANS
I
COPYING OPERATION
PROHIBITION MEANS
I
COPYING SHEET
HOLDING MEANS
I /‘"D
TIMER CONTROL
MEANS
1
/
COPYING OPERATION
RESTARTING MEANS
‘IF
DISCHARGE
SELECTION MEANS
U
SHEET SIZE
DISCRIMINATION MEANS
I
16
/
1H
DISCHARGE
MEANS
1K
1
/
COUNTER CONTROL MEANS
COPY INSTRUCTION MEANS
US. Patent
Apr. 14, 1992
5/42,:220:w
TIC...
Sheet 2 of 10
5,105,229
US. Patent
Apr. 14, 1992
Sheet 3 of 10
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Sheet 4 of 10
5,105,229
52
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16bit
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FIG
4
,aos
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RAM
SoRTER
I
400
300
-125
BLANK ExPoSuRE UNIT
]»137
INTERM DIAT TRAY SHEET
RDF
I
coPY ToTAL COUNTER
FEED RLEILLERE
425
807
INTERMEDIATE TRAY wEIGHT
217
1
Hum -FLAPPER
219
1/0
OUTPUT
F‘
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(3255)
I
MAIN MOTOR
133
HIGH voLTAGE UNIT
135
{
DIScHARGE FLAPPER
}P2II
L-L
SHEET FEED
I RoLLER
‘
1S7
TIMER
oPTIcAL SYSTEM MOTOR
-——-[
—115
REGISTRATION cLuTcH
159
HOME PoSITIoN SENSOR
117
IMAGE TIP SENSOR
i121
899
l 0
I
INPUT ——-———{
I
MULTI- DIScHARGE SENSOR
(8255)
PEDESTAL SENSOR
1/0
DISPLAY GRouP
KEY GRouP
811 I
I
(8255)
-223
‘157
700
- 600
US. Patent
Apr. 14, 1992
Sheet 5 of 10
5,105,229
FIG. 5
te 1
C RDF JAM DETECTION )/S p
Step 2
IS THE PREPARATION
FOR RESTARTING THE
COPYING OPERATION
COMPLETED ?
IS THE SELECTED
SHEET SIZE
CHANGED ?
Step 5
IS THE COPY START KEY
TURNED ON ?
Step 6
COPY TOTAL
/.
COUNTER
COUNTS UP
COPY PROCESSING
END
S I elp “
BLANK SHEET
DISCHARGE
PROCESSING
\ Step 7
US. Patent
Apr. 14, 1992
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Sheet 6 of 10
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5,105,229
US. Patent
Apr. 14, 1992
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Sheet 7 of 10
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FIG7A
53 .323
S3
5,105,229
US. Patent
Apr. 14, 1992
Sheet 8 of 10
5,105,229
C RDF JAM DETECTION )Step 3-1
‘
TIMER STARTS
~Step 8-2
Step 8-3
HAS
YES
A PREDETERMINED
TIME ELAPSED ?/
TIMER COUNTS up
N0
Step 8_5
IS THE PREPARATION FOR
~TO< OPERATION
RESTARTINGCOMPLETED
THE COPYING>
?
YES
Step 6 - 6
15 THE DISCHARGE
SELECTION KEY
TURNED 0N '.>
Step 8-7
IS THE COPY
_&<TURNED
START KEY
on '2
Step 8-4
Step 8'5 "
COPY TOTAL
COUNTER coums up
l
Step 8-9-
COPY PROCESSING
END
J
BLANK SHEET
DISCHARGE
PROCESSING
US. Patent
Apr. 14, 1992
U
Sheet 9 of 10
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US. Patent
Apr. 14', 1992
Sheet 10 of 10
5,105,229
FIG. IO
C RDFJAM DETECTION )StepTOI
FEED REVERSING
PROCESSING
,Ste 1 Z
p O
Step103
15 THE PREPARATION FOR
RESTARTING THE COPYING
<OPERATION COMPLETED ?
NO
>——
YES
Step 104
IS THE SELECTED SHEET
SIZE CHANGED ?
YES
IS THE COPY START KEY
TURNED ON ?
YES
COPY TOTAL
COUNTER
COUNTS UP
COPY PROCESSING
END
SW10?
/
Step 105
‘
‘
BLANK SHEET
DISCHARGE
PROCESSING
I\ Step T08
1
5,105,229
2
started at the same time as the original S2 is set on the
IMAGE RECORDING APPARATUS
original platen 101.
According to the previously-fed sheet sequence sys
BACKGROUND OF THE INVENTION
tem, the copying sheet can be fed from a cassette to the
1. Field of the Invention
This invention relates to an image recording appara
tus, and more speci?cally to an image recording appara
registration roller 159 during the setting of an original
on the original platen 101. Accordingly, the copying
speed is improved as compared with the general sheet
feed sequence system.
However, in the above described known image re
2. Description of the Related Art
10 cording apparatus, when an original jamming occurs in
Known image recording apparatuses, such as a
the RDF during an exchange of originals, the copying
copier, are used in combination with a recirculating
sheet
that corresponds to the jammed original has al
document feeder (hereinafter referred to as “RDF”). In
ready been fed. Since the copying sheet cannot be re
such a known image recording apparatus, originals in a
turned to the cassette, the copying sheet cannot be used
stacking tray are separated one by one from the bottom
after the jam is cleared and is unavoidably discharged
of an original bundle, and a separated original is fed to
out
of the apparatus as a plain sheet without being used.
an exposure position for exposing. After the completion
Accordingly, the known image recording apparatus
of an exposure operation, the separated original is re
suffers from a problem in that one copying sheet is
turned to the tray at the top of the original bundle.
consumed whenever an original jamming occurs.
Referring to FIG. 6A through 6C, a general sheet
The known image recording apparatus also suffers
feed sequence system will be described in detail.
tus which can use a recording sheet ef?ciently.
In FIG. 6A, an original S3 from the bottom of an
original bundle S set in a RDF, such as three sheets of
from a problem in that the count of copied sheets is
erroneously increased whenever the unused sheet is
a predetermined position as shown in FIG. 6B. When
provide an image recording apparatus that can over
come the problems described above.
discharged.
originals, is transported to an original platen 101. Then,
a recording material P (hereinafter referred as “copying 25
SUMMARY OF THE INVENTION
sheet”) is conducted to a registration roller 159 by a
Accordingly,
an object of the present invention is to
feed roller 207 at a time when the original S3 arrives at
the copying sheet P arrives at the registration roller 159,
a scanning operation of the original S3 by a illumination
lamp 103 is started as shown in FIG. 6C. The registra
Another object of the present invention is to provide
an image recording apparatus that can record an image
at high speed.
tion roller 159 starts to feed the copying sheet toward
Still another object of the present invention is to
photosensitive drum 131 at a time when the illumination
provide an image recording apparatus that can prevent
lamp 103 passes through an image tip sensor 117, so as
35 an unnecessary consumption of a sheet.
to record an image on the copying sheet P.
It is still another object of the present invention to
Thus, in a general sheet feed sequence system, the
steps of exchanging originals, stoping the new original
on the original platen, feeding a copying sheet from a
cassette, waiting for the copying sheet to arrive at the
provide an image recording apparatus that performs
reasonable operation without being affected by a mal
function.
Still another object of the present invention is to
provide an image recording apparatus that can prevent
registration roller, and starting a scanning operation, are
all performed sequentially. No step starts until the pre
an unnecessary charge to an operator.
vious step is complete.
These objects are acheived through the provision of
In the interests of improving copying speed, a previ~
an image recording apparatus comprising sheet feeding
ously-fed sheet sequence system has been proposed.
45 means for feeding a sheet to a recording position, re
' In the previously-fed sheet‘sequence system, the steps
cording means for recording an image on the sheet fed
of exchanging originals and stoping the new original on
by said sheet feeding means, jam detection means for
the original platen are performed at the same time as the
detecting a jamming in the apparatus, and sheet holding
steps of feeding a copying sheet from a cassette and
means for holding a sheet fed by said sheet feeding
waiting for the copying sheet to arrive at the registra
tion roller. After all of these steps are completed, the
scanning operation is started.
means in accordance with a detection signal from said
jam detection means to reuse the sheet.
Other objects, features and advantages of the inven
tion will become apparent from the following detailed
55 description of the preferred embodiments of the present
invention and the accompanying drawings.
roller 159 starts to feed the copying sheet to photosensi
Such a sequence is shown in FIGS. 7A through 7C.
In FIG. 7A, the scanning operation of the original S3 by
the illumination lamp 103 is started. The registration
tive drum 131 at a time when the illumination lamp 103
BRIEF DESCRIPTION OF THE DRAWINGS
passes through the image tip sensor 117, so as to record
FIG.
1 is a block diagram showing the signal ?ow
an image on the copying sheet P.
In FIG. 7B, the illumination lamp 103 has returned to 60 within an image recording apparatus according to the
present invention.
FIG. 2 is a schematic diagram showing an example of
a copying apparatus to which this invention is applied;
the feed roller 207 at the same time as the next original
FIG. 3 is a top plan view showing an operation panel
S2 starts to be transported to the original platen 101 and
65 of an image recording apparatus;
the transport of the original S3 is started.
its initial position upon completion of the scanning oper
ation. The next copying sheet P then starts to be fed by
The copying sheet P is set to the registration roller
159 before the original 52 is set on the original platen
101 as shown in FIG. 7C. The scanning operation is
FIG. 4 is a block diagram showing a circuit of a
control unit of an image recording apparatus according
to this invention;
3
5,105,229
FIG. 5 is a flow chart showing a control procedure
according to a ?rst embodiment of the present inven
developing roller 140.
tion;
FIG. 6A through FIG. 6C are diagrams for explain
ing a known sheet feed sequence operation;
FIG. 7A through FIG. 7C are diagrams for explain
ing a known previously-fed sheet sequence operation;
The main body 100 further includes a transfer char
ger 141, a separation charger 143, a cleaning unit 145, an
upper cassette 151, a lower cassette 153, a manual sheet
feed inlet 171, sheet feed rollers 155, 157, and a registra
tion roller 159. A transport belt 161 is provided for
transporting a recorded sheet to a ?xing unit 163. The
?xing unit 163 is provided for ?xing an image on the
FIG. 8 is a flow chart showing a control procedure
according to a second embodiment of the present inven
tion;
copying sheet, which is transported by the transport
belt 161, by heat fusing. A discharge roller 165 is in
cluded for transporting the fixed sheet to the pedestal
FIG. 9A through FIG. 9C are diagrams for explain
ing loop correction processing; and
FIG. 10 is a flow chart showing a control procedure
according to a third embodiment of the present inven
tion.
200, and a sensor 167 is provided for detecting a sheet in
the case of duplex copying.
The surface of the photosensitive drum 131 is made of
a seamless photosensitive member structured with a
photoconductive member and an electrical conductor.
DETAILED DESCRIPTION OF THE
PREFERRED EMBODIMENTS
Preferred embodiments of the present invention will
be described in detail herein with reference to the ac
The drum 131, which is supported for rotation about its
axis, starts rotating in the direction indicated by the
arrow upon actuation of the main motor 133 in response
to depression of a copy start key. After completion of a
companying drawings.
FIG. 1 is a block diagram showing an arrangement of
an image recording apparatus according to the present
invention. The image recording apparatus in FIG. 1
includes an original jamming detection means 1A for 25
detecting an original jamming in a recycle document
feeder, a copying operation prohibition means 1B for
interrupting a copying operation in accordance with a
detection signal from the original jamming detection
4
blank exposure unit 137, a developing unit 139, and a
predetermined rotation control and potential control
process (preliminary process) of the drum 131, the origi
nal placed on the platen glass 101 is illuminated by the
illumination lamp 103 integral with the ?rst scanning
mirror 105. The reflected light from the original passes
through the ?rst scanning mirror 105, the second scanning mirror 107, the third scanning mirror 109, the lens
111, and the fourth scanning mirror 113, and is focused
means 1A, and a copying sheet holding means 1C for 30 on the drum 131.
holding a copying sheet to cause the copying sheet to be
The drum 131 is corona-discharged by the high volt
reused.
age unit 135. Thereafter, the image (original image)
The image recording apparatus also includes a timer
illuminated by the illumination lamp is slit-exposed to
control means 1D, a copying operation restarting means
thereby form an electrostatic latent image on the drum
1E, a discharge selection means 1F, and a sheet size 35 131 by means of a known Carson method. Then, the
discrimination means 16 for discriminating coincidence
electrostatic latent image on the photosensitive drum
between a designated sheet size and a previously fed
131 is developed by the developing roller 140 of the
sheet size. The image recording apparatus further in
developing unit 139, and visualized as a toner image.
cludes a discharge means 1H for discharging a copying
The toner image is transferred onto a copy sheet by the
sheet, counter control means 1K for controlling the
transfer charger 141 as will be explained later.
total number of copied sheets, and a copying instruction
Meanwhile, the transfer sheet set in the upper cassette
means 1L.
151 or the lower cassette 153 or the transfer sheet set in
FIG. 2 shows an embodiment of a copying apparatus
the manual sheet feed inlet 171 is fed into the main body
to which this invention is applied.
100 by the feed rollers 155 or 157. The fed transfer sheet
The copying apparatus shown in FIG. 2 includes a 45 is then transported toward the photosensitive drum 131
copying apparatus main body 100, a pedestal 200 capa
at an accurate timing by the registration roller 159,
ble of turning over a recording medium (copying sheet)
whereby the tip of the latent image is made coincident
for allowing both front and back sides thereof to be
with the leading edge of the transfer sheet. Thereafter,
copied (duplex copying) and a multi-recording function
the toner image on the drum 131 is transferred onto the
to allow a same recording medium (P) to be copied 50 transfer sheet by passing the transfer sheet through the
plural times, a recirculating document feeder 300 for
performing automatic feeding of documents, and a
gap between the transfer charger 141 and the drum 131.
After the transfer step has been completed, the transfer
sorter 400 for sorting recorded sheets into a plurality of
sheet is separated from the photosensitive drum 131 by
bins. The main body 100 can be used with any desired
the separation charger 143, and conducted into the
combination of the units 200 to 400.
55 ?xing unit 163 by the transport belt 161.
A. MAIN BODY 100
The main body 100 includes a platen glass 101 on
which an original is placed, an illumination lamp (expo
sure lamp) 103 for illuminating an original, scan re?ec
tion mirrors 105, 107 and 109 for changing the optical
path of a light re?ected from the original, lens 111 hav
ing focus and variable magni?cation functions, a fourth
scan re?ection mirror 113 for changing the optical path,
In the ?xing unit .163, the transferred image is ?xed by
I the application of pressure and heat. The ?xed sheet is
then discharged out of the main body 100 by the dis
charge roller 165.
The drum 131 continues rotating after the image
transfer so that the surface thereof is cleaned by the
cleaning unit 145 structured with a cleaning roller and
an elastic blade.
B. PEDESTAL 200
and a motor 115 for driving the optical system. The 65
main body 100 also includes sensors 117, 121, a photo
The pedestal 200 is provided for receiving and hold
sensitive drum 131, a main motor 133 for driving the
ing the sheet discharged from the main body 100. The
photosensitive drum 131, a high voltage unit 135, a
pedestal 200 can be dismounted from the main body
5
5,105,229
6
100, and includes a deck 201 capable of accommodating
2000 transfer sheets, and an intermediate tray 203 for
use in duplex copying. A lifter of the deck 201 rises up
detecting one cycle of original feeding. The recycle
or goes down in accordance with the number of transfer
sheets so as to always make the transfer sheet contact a
fed one-by-one. When the trailing edge of the ?nal
original passes through the recycle lever 309, the recy
feed roller 207.
The pedestal 200 also includes a feed support roller
208, and a discharge ?apper 211 for switching between
the passage for duplex or multi-recording and the dis
charge passage.
The pedestal 200 further includes transport passages
213, 215 for transport belt, and an intermediate ‘tray
weight 217 for pushing the transfer sheets. A transfer
sheet passing through the discharge ?apper 211 and the
transport passages 213, 215 is turned over, and is accom
modated within the intermediate tray 203 for duplex
recording. A multi-?apper 219 for switching between
the passages of the duplex recording and the passages of
the multi-recording is mounted between the transport
passages 213 and 215. The transfer sheet is guided
toward a multi-recording passage 221 by moving the
multi-?apper upwards.
lever 309 is placed on the top of the original bundle S at
the start of feeding the originals, and the originals are
cle lever 309 falls by its own weight to detect the com
pletion of one cycle of original feeding operation.
If the original bundle S is a bundle of double-sided
originals, the RDF 300 operates as follows.
The original is conducted into the path III over the
paths I and II as described above. Then, a rotatable
switching ?apper 310 is switched to conduct the leading
edge of the original into a path IV. The original is then
passed through the path II by the feed roller 305, trans
ported to the platen glass 101 by the ?at-face belt 306,
and stopped. In other words, the original is reversed by
the feed large roller 307 in accordance with the route
formed by the paths III-IV-II.
The number of the originals can be counted, since the
originals are fed one-by-one from the original bundle S
over the paths I-II-III-IV-VI until the recycle lever 309
detects the completion of one cycle of original feeding
operation. A paper detecting sensor 311 is provided for
A multi-discharge sensor 223 is provided for detect
ing the trailing edge of the transfer sheet in the case
where the multi-flapper 219 is derived. A feed roller 225 25 detecting the original.
is provided for feeding the transfer sheet from a passage
D. SORTER 400
227 toward drum 131. A discharge roller 229 is pro
The sorter 400 has 25 tray bins 411 for loading or
vided for discharging the transfer sheet out of the ped
sorting recorded sheets.
_
estal 200.
Operation
modes
of
the
sorter
400
includes
non-sort
In duplex recording or multi-recording, the ?apper
mode, sort mode, and collate mode, and the selected
211 is moved upwards to feed the copied transfer sheet
mode is displayed on the copying apparatus 100. When
to the passages 213, 215, and to accommodate it in the
a copy start key 605 of an operation panel, which will be
intermediate tray 203. In the case of duplex recording,
described later, is pressed, the sorter 400 operates as
the multi-flapper 219 is moved downwards. And, in the
case of the multi-recording, the multi-?apper 219 is 35 follows in accordance with a operation mode selected
before the press of the copy start key 605.
moved upwards.
In the non~sort mode, a bin unit shift motor 420 is not
The intermediate tray 203 can accommodate, e.g., 99
driven in response to sheet accomodation, thereby a bin
copied transfer sheets. The copied transfer sheets ac
shift operation is not performed. Accordingly, copied
commodated within the intermediate tray are held
down by the intermediate tray weight 217. During the
back side recording in duplex copying or during multi
recording, the transfer sheets within the intermediate
sheets are sequentially discharged from the main body
100 through the discharge roller 229, and accommo
dated within a single tray 411 through a non-sort dis
charge roller 407.
tray 203 guided one by one from the bottom of the
In the sort mode, the bin unit shift motor 420 is actu
sheets stack via the passage 227 to the registration roller
159 with the aid of the feed roller 225 and the weight 45 ated in the case where the highest bin is in a position
higher than a sort discharge roller 405. Each bin of the
217.
sorter 400 is shifted until the highest bin is in a position
C. RDF (RECIRCULATING DOCUMENT
lower than the sort discharge roller 405. And, when the
FEEDER) 300
highest bin is in the lower position, the bin shift opera
The recirculating document feeder (RDF) 300 is 50 tion is stopped (such position is hereinafter referred to
as “sort home position”).
provided for feeding documents sequentially in a recy
The copied sheets are sequentially discharged from
cle fashion. In the RDF 300, a stacking tray 301 is pro
the main body 100 through the discharge roller 229, and
vided for receiving a bundle S of originals sit thereon. If
conducted to a transport roller 401 of the sorter 400.
the original bundle S is a bundle of one-sided originals,
the RDF 300 operates as follows.
55 The copied sheets are then discharged into each bin 411
through a path 403 by the discharge roller 405. And,
The originals in the stacking tray 301 are separated
each bin is shifted upwards or downwards by the bin
one by one from the bottom of the original bundle S by
shift motor 420 each time a copied sheet is discharged
means of a semicircular roller 304 and a separating
into the associated bin.
roller 303, each of which is actuated by a separating
motor (not shown). The original thus separated is trans 60 In the collate mode, a bin shift motor 420 is driven to
ported to a exposure position on the platen glass 101
shift each bin to the sort home position as the SORT
along paths I and II by means of a feed roller 305 and a
mode. The copied sheets are then sequentially dis
?at-face belt 306, where the transport of the original is
charged from the main body 100 through the discharge
stopped and a copying operation is started.
roller 229, and conducted to the transport roller 401 of
After the copying operation, the original is fed into a 65 the sorter 400. The copied sheets are discharged into
path V over a path III by a feed large roller 307, and
each bin 411 through the path 403 by the discharge
then returned to the top of the original bundle S by a
roller 405. And each bin is shifted upwards or down
discharge roller 308. A recycle lever 309 is provided for
wards by the bin shift motor 420 each time the originals
7
5,105,229
8
are fed one-by-one. A discharge detecting sensor 430 is
provided for superimposing the images of two originals
provided for detecting the copied sheets.
on the same surface of a transfer sheet.
operation panel provided on the aforementioned main
body 100. The operation panel is structured with a key
An original frame erasure key 620 is provided for
erasing the frame of a regular size original. The size of
the original is set by the asterisk key 601 after the de
pressing of the original frame erasure key 620. A sheet
frame erasure key 621 is provided for erasing the frame
group 600 and a display group 700 as described herein
of an original in accordance with the size of a selected
E. KEY GROUP 600
FIG. 3 shows an example of the con?guration of an
after.
cassette. A page consecutive copy key 622 is provided
Referring to FIG. 3, an asterisk (“"’) key 601 is pro 10 for consecutively copying the right and left pages of an
vided for designating a set mode such as for setting a
binding margin, an original frame erasure size and so
7 original onto different transfer sheets.
A discharge method (staple, sort, collate) selection
forth by an operator. An “all reset” key 606 is provided
key 614 is provided for selecting or releasing the staple
for setting the copying apparatus to a standard mode.
mode or the sort mode in the case where a stapler is
The all reset key 606 is pressed when the copying appa 15 operatively coupled to bind recorded sheets with sta
ratus is set to the standard mode.
A pre-heat key 602 is provided for setting the mecha
ples, or for selecting or releasing the sort mode or the
collate mode in the case where the sorter is coupled. A
nism of the main body 100 to a pre-heat state, or for
sheet folding selection key 615 is provided for selecting
releasing the pre-heat state. The pre-heat key 602 is also
into the standard mode. Copy start key 605 is provided
or releasing a Z-fold operation, which folds an A3 or B4
size recorded sheet in Z-shape in cross section, or for
selecting or releasing a half-fold operation, which folds
for starting a copying operation. Clear/stop key 604
an A3 or B4 size recorded sheet in halves.
used for recovering from an automatic shut off state
A bin shift operation selection key 650 is also pro
vided for selecting a ?rst mode by which each bin is
as a clear key, the clear/stop key 604 is used for releas 25 shifted to a primary position (the sort home position)
ing the set number of copying sheets, and also used for
before starting the accommodation of the recorded
releasing an asterisk mode. When it functions as a stop
sheets, and for selecting a second mode by which the
key, clear/stop key 604 is used for interrupting consecu
bin shift operation is not performed.
functions as a clear key during a stand-by state and a
stop key during a copying operation. When it functions
tive copying to stop the copying operation after the
A discharge selection key 660 is provided for select
copying operation at the time of the key depression is 30 ing discharge operation of a previously fed transfer
completed.
paper.
A ten-key keypad 603 is provided for setting the
F. DISPLAY GROUP 700
number of copies, and for setting the asterisk mode.
Memory keys 619 are provided for registering modes
Referring to FIG. 3, an LCD (liquid-crystal device)
an operator frequently uses. In this example, four modes 35 type of message display 701 is provided for displaying
M1 to M4 can be registered by the memory keys 619.
copying information. The message display 701 can dis
Copy density keys 611, 612 are provided for manually
play a 40-character message, each character being
adjusting copy density. An AE (automatic exposure)
structured with 5 X 7 dots, and a copying magni?cation
key 613 is provided for automatically adjusting copy
density in accordance with the density or original, and
for switching the density adjustment from AE adjust
ment to manual adjustment.
set by the regular magni?cation keys 608, 609, the equal
magni?cation key 610, and the zoom keys 617, 618. The
message display 701 is a semi-transparent liquid-crystal
display, and two backlight colors are employed. Nor
A cassette selection key 607 is provided for selecting
mally, green backlight lights, but in an abnormal or a
one of the upper cassette 151, lower cassette 153, and
the deck 201. The cassette selection key 607 can be used 45
copy-disable state, orange backlight lights.
An equal magni?cation display 706 is provided for
as a key for selecting an APS (Automatic Paper Selec
lighting in the case where equal magni?cation is se
lected. A color developing unit display 703 is provided
Upon selection of the APS mode, the cassette having
for lighting in the case where a sepia developing unit is
the same size sheet as the original can be automatically
set. A copy number display 702 is provided for display
selected.
50 ing the number of copies or a self-diagnosis code. A
An equal magni?cation key 610 is provided for per
selected-cassette display 705 is provided for displaying
tion) mode while an original is placed on the RDF 300. ‘
forming equal magni?cation (actual size) copying'. An
automatic variable magni?cation key 616 is provided
for automatically reducing or magnifying the size of the
which of the upper cassette 151, the lower cassette 153,
and the deck 201 is selected. An AE display 704 is pro
vided for lighting in the case where an AE mode (auto
image of an original depending on the designated trans 55 matic copy density adjustment mode) is selected by the
fer sheet image. Zoom keys 617, 618 are provided for I AE key 613.
designating a desired magni?cation factor between 64%
A pre-heat display 709 is provided for lighting during
to l42%. Regular magni?cation keys 608, 609 are pro
the pre-heat state, and for blinking during the automatic
vided for designating a regular size reduction or magni
shut off state. A ready/wait display 707 structured with
?cation.
60 a green-emitting LED and an orange-emitting LED is
A duplex copy key 626 is provided for producing a
provided for lighting the green-emitting LED in a
two-sided copy from a one-sided original, for producing
ready (copy-enable) state, and for lighting the orange
a two-sided copy from a two-sided original, or for pro
emitting LED in a wait (copy-disable) state.
ducing a one-sided copy from a two-sided original. A
A duplex copy display 708 is provided for lighting in
binding margin key 625 is provided for forming a bind 65 the case where the production of a two-sided copy from
ing margin having designated width on the left side of a
a two-sided original or the production of a two-sided
transfer sheet. A photograph key 624 is provided for
copy from a one-sided original is selected. If the RDF
copying a photographic original. A multi-kcy 623 is
300 is used in the standard mode, the copying apparatus
5,105,229
9
sets the number of copies at “one”, and sets the AE
mode, the ASP mode, equal magni?cation, and the
production of a one-sided copy from a one-sided origi
nal automatically.
10
In step 3, the CPU 801 discriminates whether the
selected sheet size is changed or not by pressing the
cassette selection key 607 or whether another sheet size
different from the size of the previously fed blank sheet
by the APS mode is selected or not.
When the CPU 801 determines that the selected sheet
size is changed, the ?ow advances to step 4. In step 4,
,
If the RDF 300 is not used in the standard mode, the
copying apparatus sets the number of copies for “one",
and sets manual density adjustment, equal magni?ca
the previously fed blank copying sheet is discharged
without transferring an image (such processing is here
tion, and the production of a one-sided copy from a
one-sided original.
The difference between use and non-use of the RDF
300 depends on whether an original is placed on the
inafter referred to as “blank sheet discharge process
RDF 300 or not.
When, in step 3, the selected sheet size is consistent
with the size of the previously fed blank sheet, the flow
ing”).
A power source lamp 710 is provided for lighting in
advances to step 5 to await depression of the copy start
the case where a power switch is turned on.
G. CONTROL DEVICE 800
FIG. 4 is an example showing a circuit arrangement
of a control device 800 of the copying apparatus main
body 100. In the drawing, a central processing unit
(CPU) 801 performs operation control for executing
image formation and sheet post-processing. A read only
15
key 605.
In step 6, the copy total counter 125 counts up. In
step 7, an image is transferred onto the previously fed
blank sheet as described above.
According to a conventional copying apparatus,
memory (ROM) 803 is provided for storing a control
when a jamming is detected during original exchange
operation by the RDF, a previously fed blank sheet is
discharged out of the apparatus unconditionally with
procedure (control program), which will be described
out being copied, and the copy total counter counts up.
hereinafter. The CPU 801 controls each element con
However, according to this embodiment, an image is
nected thereto via a bus in accordance with the control 25 transferred onto a previously fed blank sheet in the case
procedure stored in the ROM 803.
A random access memory (RAM) 805 is provided as
where the selected sheet size is consistent with the size
of the blank sheet upon restarting the copying opera
a main storage device for storing input data, or for using
tion. And the blank sheet is discharged out of the appa
as a working memory area.
An interface (I/O) 807 is provided for outputting
ratus in the case where the selected sheet size is not
30 consistent with the size of the blank sheet.
control signals from the CPU 801 to each load, for
example, the main motor 133, a copy total counter 125,
tor can be avoided by preventing the counting up of the
the blank exposure unit 137, the high voltage unit 135,
the sheet feed rollers 155, 157, the optical system motor
copy total counter 125.
FIG. 8 is a ?ow chart showing a procedure of a con
In the latter case, an unnecessary charge to an opera
115, the registration clutch 159, the intermediate tray 35 trol operation according to a second embodiment of the
sheet feed roller 225, the multi-flapper 219, the dis
present invention.
charge ?apper 211, and the intermediate tray weight
In step 8-1, during an original feeding by the RDF
217. An interface (I/O) 809 is provided for sending
300, when a stationary jamming is detected by the paper
signals inputted from the image tip sensor 121, the home
detecting sensor 311, control progesses to step 8-2
position sensor 117, the pedestal sensor 167, the multi
where the timer 812 starts, and a previously fed blank
discharge sensor 223, and so forth to the CPU 801.
copying sheet is stopped and held by the registration
An interface (V0) 811 is also provided for control
ling input/output operations between the key group 600
roller 159.
A copying sheet onto which an image has success
and the display group 700. A timer 812 is provided for
fully been transferred is discharged normally, and the
counting a predetermined time.
45 main motor 133 is stopped after performing a predeter
The display group 700 corresponds to the displays
mined post-rotation. Step 8-3 checks whether a prede
shown in FIG. 3, and utilizes LEDS or LCDs. The key
termined time has elapsed or not. In the case where the
group 600 corresponds to the keys shown in the same
drawing, and the CPR 801 can discriminate which key
is pressed by utilizing a known key matrix.
FIG. 5 is a flow chart showing a control procedure
according to a ?rst embodiment of the present inven
tion.
In step 1, during an original feeding by the RDF 300,
if sensor 311 detects that the original has not fed prop
erly, then a “stationary jamming” is indicated. When a
stationary jamming is indicated, a previously fed blank
copying sheet is stopped and held by the registration
jamming is not ‘corrected even if the predetermined time
has elapsed, the ?ow advances to step 84. In step 84,
the previously fed blank sheet is discharged without
transferring an image.
0n the other hand, when, in step 8-3, the CPU 801
determines that the predetermined time has not elapsed,
control progresses to step 8-5 where the CPU 801 deter
mines whether a preparation for restarting the copying
operation is completed or not. When the preparation is
not completed, the flow returns to step 8-3 to wait a
counting up of the timer.
When, in step 8-5, the CPU 801 determines that the
successfully been transferred, is discharged normally, 60 preparation is completed, the ?ow advances to step 8-6.
and the main motor 133 is stopped after performing a
Step 8-6 checks whether the discharge selection key 660
roller 159. A copying sheets onto which an image has
predetermined post-rotation.
In step 2, the CPU 801 determines whether the jam
ming by the paper detecting sensor 311 has been cor
is turned on or not.
'
When the CPU 801 determines that the discharge
selection key 660 is turned on, the flow advances to step
rected or not. That is, the CPU 801 determines whether 65 8-4, and the previously fed blank sheet is discharged
a preparation for restarting the copying operation is
without transferring an image. When, in step 8-6, the
completed or not. When, in step 2, the preparation is
CPU 801 determines that the discharge selection key
completed, the flow advances to step 3.
660 is not turned on, the flow advances to step 8-7.
11
5,105,229
12
*
In step 8-7, it is checked whether the copy start key
out transferring an image. When, in step 104, the CPU
605 is turned on or not. When the CPU 801 determines
801 determines that the selected sheet size is not
that the copy start key 605 is turned on, the copy total
counter 125 counts up in step 8-8. In step 89, an image
is transferred onto the previously fed blank sheet. If the
discharge selection key 660 or the copy start key 605 are
not turned on within the predetermined time, the CPU
changed, that is, the selected sheet size is consistent
with the size of the previously fed blank sheet, the flow
advances to step 106 to wait for the copy start key 605
801 executes the blank sheet discharge processing.
According to the second embodiment, the timer 812
starts when a jamming is detected. If the discharge
ously fed blank sheet.
a loop for feeding the blank sheet into the registration
tion, various modifications thereof, after study of this
to be pressed.
'
In step 107, the copy total counter 125 counts up.
In step 108, an image is transferred onto the previ
According to this embodiment, when a jamming is
selection key 660 is turned on within a predetermined
detected, the last blank sheet fed from a cassette is re
time, or unless the copy start key 605 is turned on even
versed back toward the cassette, and is held so that it
if the discharge selection key 660 is not turned on, a
can be reused after the jamming is corrected.
previously fed blank sheet is discharged as a plain sheet
The last blank sheet fed from cassette is discharged
without transferring an image. When the blank sheet is
out of the apparatus in the case where the selected sheet
discharged, the copy total counter does not count up.
size is not consistent with the size of the last blank sheet
And, an image is transferred onto the previously fed
upon restarting the copying operation. In this case, the
blank sheet only in the case where the copy start key
copy total counter 125 doesn’t count up.
605 is turned on within the predetermined time.
On the other hand, an image is transferred onto the
FIG. 9A illustrates the reason for setting the prede 20 last blank, sheet, which can be reused after the jamming
termined time. If a previously fed blank sheet is left in
is corrected, in the case where the selected sheet size is
the form of a loop for a long time while feeding the
consistent with the size of the last blank sheet.
blank sheet into the registration roller 159, the blank
As mentioned above, according to the present inven
sheet becomes curled, which adversely affects the abil
tion, unnecessary consumption of a sheet can be pre
ity of the blank sheet to receive an image.
25 vented. Further, according to the present invention, an
FIG. 9A through FIG. 9C illustrate loop correction
unnecessary charge to an operator can be prevented.
processing of a previously fed blank sheet. In FIG. 9A,
Although particular embodiments of the preset in
the previously fed blank sheet is stopped in the form of
vention are herein disclosed for purposes of explana
roller 159, as described above.
30 speci?cation, will be apparent to those skilled in the art
In the case where a jamming in the RDF 300 is de
to which the invention pertains.
tected, the feed roller 207 is pulled up, and the feed
The specific structural details of the devices repre
sented by blocks in the schematic diagrams of FIGS. 1
support roller 208 is reversed to correct the loop as
illustrated in FIG. 9B (such processing is hereinafter
and FIGS. 4 are per se well known or could be readily
referred to as “feed reversing processing”). This pre 35 constructed by the person of ordinary skill in this ?eld.
vents a normal copying operation from being disturbed
Therefore, the exact structure of the blocks in the sche
by curling of the blank sheet if the loop formed in the
matics is not described in further detail in order to de
blank sheet is not corrected.
scribe the present invention more clearly, and since
As illustrated in FIG. 9C, it is also possible to correct
such details are not critical to the best mode of carrying
the loop by feeding only a portion of the blank sheet,
40 out the present invention.
which corresponds to the formed loop, in advance upon
rotating the registration roller 159 in the forward direc
While the present invention has been described with
respect to what is presently considered to be the pre
tion from a state formed the loop as illustrated in FIG.
ferred embodiments, it is to be understood that the in
9A.
vention is not limited to the disclosed embodiments. To
FIG. 10 is a flow chart showing a control procedure 45 the contrary, the present invention is intended to cover
including the above mentioned loop correction process
various modi?cations and equivalent arrangements in
mg.
cluded within the spirit and scope of the appended
In step 101, during an original feeding by the RDF
300, when a stationary jamming is detecting by the
claims.
paper detecting sensor 311, the above mentioned feed 50
reversing processing is performed in step 102.
In step 103, a sheet, on which an image has success
fully been transferred is discharged normally, and the
main motor 133 is stopped after performing a predeter
mined post-rotation. When the CPU 801 determines by
55
been corrected, preparations for restarting the copying
’
When the CPU 801 determines that the preparation
has been completed, the flow advances to step 104.
In step 104, the CPU 801 discriminates whether the
cassette selection key 607 has been depressed to change
the selected sheet size, or whether another sheet size
different from the size of a previously fed blank sheet by
the APS mode has been selected or not.
When the CPU 801 determines that the selected sheet
size is changed, the flow advances to step 105. In step
105, the previously fed blank sheet is discharged with
1. An image recording apparatus comprising:
original transporting means for transporting originals
to an exposure position;
the paper detecting sensor 311 that the jamming has
operation are undertaken.
-
What is claimed is:
jam detection means for detecting a jamming of the
original in transporting to the exposure position;
sheet feeding means for feeding a recording sheet;
recording means for recording an image from the
original on the recording sheet fed by said sheet
feeding means;
sheet holding means for stopping and holding a sheet
fed by said sheet feeding means in a predetermined
position when said jam detection means detects a
jamming of the original; and
control means for causing said sheet feeding means to
feed a recording sheet held by said sheet holding
65
means in order to record on said sheet when image
recording resumes after releasing jamming.
2. An image recording apparatus according to claim
1, wherein said sheet feeding means starts feeding a
13
5,105,229
8, further comprising:
sheet size selection means for selecting an arbitrary
3. An image recording apparatus according to claim
sheet size;
1, further comprising: sheet size selection means for
selecting an arbitrary sheet size; sheet discharge means 5
for discharging the sheet held by said sheet holding
means when another sheet size different from the size of
10
4. An image recording apparatus according to claim
1, further comprising sheet discharge instruction means
for forcibly discharging the sheet held by said sheet
holding means.
5. An image recording apparatus according to claim
4, wherein said sheet discharge instruction means in
cludes a manual instruction key for instructing the dis
charge of the sheet held by said sheet holding means.
6. An image recording apparatus according to claim
1, further comprising sheet discharge instruction means 20
for discharging the sheet held by said sheet holding
means, wherein said sheet discharge instruction means
includes a timer for counting a predetermined time after
the detection of the jamming by said jam detection
means to discharge the sheet forcibly.
7. An image recording apparatus according to claim
1, further comprising counting means for counting dis
charged sheets, wherein said counting means stops the
counting operation when the sheet held by said sheet
25
rected by said loop correction means when another
sheet size different from the size of the corrected .
11. An image recording apparatus according to claim
8, further comprising counting means for counting dis
charged sheets, wherein said counting means stops the
counting operation when the sheet in which the quan
tity of the loop is reduced by said loop correction means
is discharged without recording an image.
12. A copying apparatus comprising:
original feeding device for feeding originals to an
image reading position sequentially;
copying sheet feeding means for feeding a copying
sheet corresponding to an original fed by said origi
nal feeding device to a copying positon;
copying means for copying an image on the copying
sheet fed to the copying position;
original jamming detectgion means for detecting an
original jammed in said original feeding device;
copying operation prohibition means for prohibiting
a copying operation to the copying sheet fed by
said copying sheet feeding means in accordance
30
holding means is discharged without recording an im
age.
with a jam detection signal from said original jam
ming detection means;
copying sheet holding means for holding the copying
sheet fed by said copying sheet feeding means in
accordance with the jam detection signal; and
determination means for determining whether to feed
8. An image recording apparatus comprising:
sheet feeding means for feeding a recording sheet,
said sheet feeding means comprising loop forming
sheet discharge means for discharging the sheet cor
sheet is selected by said sheet size selection means.
the held sheet is selected by said sheet size selection
means.
14
10. An image recording apparatus according to claim
recording sheet before an original arrives at said expo
sure position.
a sheet held by said sheet holding means after re
35
leasing jamming of the original to perform copying
on said sheet, or to discharge said sheet without
means for stopping the recording sheet fed by said
copying.
sheet feeding means in a predetermined position
13. A copying apparatus according to claim 12 fur
temporarily and for forming a loop in the sheet so
ther comprising discharge means for discharging the
that the sheet is fed accurately;
malfunction detecting means for detecting a malfunc 40 copying sheet held by said copying sheet holding means
without copying an image in accordance with a deter
tion in said image recording apparatus;
mination result by the determination means.
loop correction means for reducing quantity of the
14. A copying apparatus according to claim 12, fur
loop in response to a detection signal from said
ther comprising counter means for counting the total
malfunction detecting means.
45 number of sheets copied by said copying apparatus,
9. An image recording apparatus according to claim
8, further comprising original feeding means for feeding
wherein said counter means counts when said determi
nation means determines to copy on said sheet and pro
originals to be copied, wherein said malfunction detect
ing means includes a jam detector for detecting a jam
hibits counting when said determination means deter
mines to discharge said sheet without copying.
ming of an original fed by said original feeding means.
1
55
65
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