Termografické tiskárny
Osnova:
1) Rozdělení metod
2) Metoda direct thermal
3) Princip faxu
4) Metoda thermal transfer
a) wax thermal transfer
b) dye sublimation method
5) Použití
6) Různé typy tiskáren
7) Adresy
POUŽITÉ ZDROJE:
Thermal printer
A printer that uses heat to transfer an impression onto paper. There are two kinds of
thermal printers:
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thermal wax transfer: a printer that adheres a wax-based ink onto paper. A
thermal printhead melts wax-based ink from the transfer ribbon onto the paper.
When cool, the wax is permanent. This type of thermal printer uses an equivalent
panel of ink for each page to be printed, no matter if a full page or only one line of
print is transferred. Monochrome printers have a black page for each page to be
printed, while color printers have either three (CMY) or four (CMYK) colored
panels for each page. Unlike thermal dye transfer printers , also called dye
sublimation printers, these printers print images as dots, which means that images
must be dithered first. As a result, images are not quite photo-realistic, although
they are very good. The big advantages of these printers over thermal dye transfer
printers are that they don't require special paper and they are faster.
direct thermal: a printer that prints the image by burning dots onto coated paper
when the paper passes over a line of heating elements. Early fax machines used
direct thermal printing.
Color printer
A printer capable of printing more than one color. Most color printers are based on the
CMYK color model, which prints in four basic colors: cyan, magenta, yellow, and black.
By printing combinations of different colors close to each other (or, in the case of thermal
dye transfer printers, on top of each other), the CMYK model can simulate most other
colors (except for special colors such as fluorescent yellow). This is the same technique
used in process color offset printing, which is the technology used to print most color
books magazines and other paper materials Some lower-price printers use only three
colors -- cyan, magenta, and yellow -- but these printers cannot print true black and their
colors tend to be a bit faded.
Color printers use a variety of techniques to lay down the different colors:
Thermal dye transfer printers, also called dye sublimation printers, heat
ribbons containing dye and then diffuse the dyes onto specially coated paper or
transparencies. These printers are the most expensive and slowest, but they
produce continuous-tone images that mimic actual photographs. Note that you
need special paper, which is quite expensive. A new breed of thermal dye transfer
printers, called snapshot printers, produce small photographic snapshots and are
much less expensive than their full-size cousins.
Thermal wax transfer printers use wax-based inks that are melted and then
laid down on regular paper or transparencies. Unlike thermal dye transfer printers,
these printers print images as dots, which means that images must be dithered first.
As a result images are not quite photo-realistic, although they are very good. The
big advantages of these printers over thermal dye transfer printers are that they
don't require special paper and they are faster.
Thermal Printer Technology
Direct Thermal
How they work
Direct Thermal labels are made from chemically sensitized paper or synthetics that turn black
when heated. A roller advances the labels and squeezes them against the printhead, which
contains a row of miniature solid-state heating elements. The printer's internal
microprocessor turns the elements on and off to form the image. Depending on the resolution
of the printer, there can be from 150 to 600 elements per inch.
Pros & Cons
The printing process is simple so the printers can be compact, fairly low in cost, and easy to
load. A disadvantage is that direct thermal labels tend to fade over time (6 months to a year),
and this process can be accelerated by heat, humidity, and exposure to sunlight. The surface
of most direct thermal labels tend to be slightly abrasive, causing printheads to wear more
rapidly than thermal transfer.
Applications
Excellent for point of sale or shipment labeling applications where labels are needed in
random quantites at irregular intervals and where the labels have a limited life expectancy.
Direct Thermal
A printer that works on the same principle as a woodburning set might seem better for a Boy
Scout than an on-the-go executive, but today's easiest to tote printers do exactly that—the
equivalent of charring an image on paper. Thermal printers use the same electrical heating of
the wood burner, a resistance that heats up with the flow of current. In the case of the thermal
printer, however, the resistance element is tiny and heats and cools quickly, in a fraction of a
second. As with inkjets, the thermal print head is the equivalent of that of a dot matrix printer,
except that it heats rather than hits.
Thermal printers do not, however, actually char the paper on which they print. Getting paper
that hot would be dangerous, precariously close to combustion (although it might let the printer
do double duty as a cigarette lighter). Instead, thermal printers use special, thermally sensitive
paper that turns from white to near-black at a moderate temperature.
Thermal technology is ideal for portable printers because few moving parts are involved—
only the print head moves, nothing inside it. No springs and wires means no jamming. The
tiny, resistive elements require little power to heat, actually less than is needed to fire a wire
in an impact printer. Thermal printers can be lightweight, quiet, and reliable. They can even
run on batteries.
The special paper they require is one drawback. Not only is it costly (because it is, after all,
special paper) but it feels funny and is prone to discolor if it is inadvertently heated to too
high a temperature; paper cannot tell the difference between a hot print head and a cozy
corner in the sun.
Gradually, thermal printers are becoming special application machines. Inkjets have many of
the same virtues and use more reasonably priced and available paper; therefore, low cost
inkjets are invading the territory of the thermal machines.
How Fax Machines Work
You can walk into nearly any office in the United States today, big or small, hi-tech or lotech, and you will find a fax machine. Connected to a normal phone line, a fax machine
allows you to transmit pieces of paper to someone else instantly! Even with FedEx and email, it is nearly impossible to do business without one of these machines today.
The Basic Idea
Fax machines have been around in one form or another for more than a century -- Alexander
Bain patented the first fax design in 1843 (click here to learn more). If you look back at some
of the early designs, you can get a very good idea of how they work today.
Most of the early designs involved a rotating drum. To send a fax, you would attach the
piece of paper to the drum, with the print facing outward. The rest of the machine worked
something like this:
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There was a small photo sensor with a lens and a light.
The photo sensor was attached to an arm and faced the sheet of paper.
The arm could move downward over the sheet of paper from one end to the other as
the sheet rotated on the drum.
In other words, it worked something like a lathe.
The photo sensor was able to focus in and look at a very small spot on the piece of paper -perhaps an area of 0.01 inches squared (0.25 millimeters squared). That little patch of paper
would be either black or white. The drum would rotate so that the photo sensor could examine
one line of the sheet of paper and then move down a line. It did this either step-wise or in a
very long spiral.
To transmit the information through a phone line, early fax machines used a very simple
technique: If the spot of paper that the photo cell was looking at were white, the fax machine
would send one tone; if it were black, it would send a different tone (see How Modems Work
for details). For example, it might have sent an 800-Hertz tone for white and a 1,300-Hertz
tone for black.
At the receiving end, there would be a similar rotating-drum mechanism, and some sort of
pen to mark on the paper. When the receiving fax machine heard a 1,300-Hertz tone it would
apply the pen to the paper, and when it heard an 800-Hertz tone it would take the pen off the
paper.
Modern Fax Machines
A modern fax machine does not have the rotating drums and is a lot faster, but it uses the
same basic mechanics to get the job done:
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At the sending end, there is some sort of sensor to read the paper. Usually, a modern
fax machine also has a paper-feed mechanism so that it is easy to send multi-page
faxes.
There is some standard way to encode the white and black spots that the fax machine
sees on the paper so that they can travel through a phone line.
At the receiving end, there is a mechanism that marks the paper with black dots.
A typical fax machine that you find in an office is officially known as a CCITT (ITU-T)
Group 3 Facsimile machine. The Group 3 designation tells you four things about the fax
machine:
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It will be able to communicate with any other Group 3 machine.
It has a horizontal resolution of 203 pixels per inch (8 pixels/mm).
It has three different vertical resolutions:
Standard: 98 lines per inch (3.85 lines/mm)
Fine: 196 lines per inch (7.7 lines/mm)
Super fine (not officially a Group 3 standard, but fairly common): 391 lines
per inch (15.4 lines/mm)
It can transmit at a maximum data rate of 14,400 bits per second (bps), and will
usually fall back to 12,000 bps, 9,600 bps, 7,200 bps, 4,800 bps or 2,400 bps if there is
a lot of noise on the line.
The fax machine typically has a CCD or photo-diode sensing array. It contains 1,728 sensors
(203 pixels per inch), so it can scan an entire line of the document at one time. The paper is lit
by a small fluorescent tube so that the sensor has a clear view.
The image sensor looks for black or white. Therefore, a single line of the document can be
represented in 1,728 bits. In standard mode, there are 1,145 lines to the document. The total
document size is:
1,728 pixels per line * 1,145 lines = approximately 2,000,000 bits of information.
To reduce the number of bits that have to be transmitted, Group 3 fax machines use three
different compression techniques:
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Modified Huffman (MH)
Modified Read (MR)
Modified Modified Read (MMR)
See this page for a discussion of these compression types. The basic idea in these schemes is
to look for "runs" of same-color bits. For example, if a line on the page is all white, the
modem can transmit a dozen or so bits rather than the full 1,728 bits scanned for the line. This
sort of compression can cut transmission time by a factor of at least two, and for many
documents much more. A document containing a significant amount of white space can
transmit in just a few seconds.
Receiving the Fax
The bits for the scanned document travel through the phone line and arrive at a receiving fax
machine. The bits are decoded, uncompressed and reassembled into the scanned lines of the
original document. There are five common ways to print the fax, depending on the type of
machine that receives it:
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Thermal paper - When fax machines started infiltrating offices en mass in the 1980s,
most of them used thermal paper. The paper is coated with chemicals that react to heat
by turning black. Thermal paper has several big advantages:
It is very inexpensive to build a thermal printer.
Thermal printers have no moving parts except for the paper-feed mechanism.
There are no expendables like ink or ribbons because the paper contains the
ink.
Thermal printers are nearly indestructible.
The only disadvantage is that the paper discolors over time, and it turns completely
black if you leave it in a hot car.
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Thermal film - Thermal film uses a page-width ribbon that contains ink that melts
onto paper when heated. This is more complicated mechanically than thermal paper
but less complicated than an inkjet.
Inkjet - This technique uses the same mechanism as an inkjet printer.
Laser printer - This technique uses the same mechanism as a laser printer.
Computer printer - The fax is actually received by a fax modem (a modem that
understands the Group 3 data standards), stored on the computer's hard disk as a
graphics file and then sent to the computer's usual printer.
Development of Printer Mechanismus for Mobile Devices
WaxThermal-Transfer Printing Method Best for Personal Printing Needs
Thermal-transfer printing methods The thermal-transfer printing method can be further divided into
two methods, wax thermal transfer and dye sublimation, as described in the chart below.
Among the various photo-quality printing methods that have been commercialized, the wax thermaltransfer method is, in principle, well suited to conserving energy and compact sizes.
Compared with the wax thermal transfer method, the dye sublimation method is in principle limited in its
energy-savings potential, as it is necessary to substantially raise the temperature of the printer head to
sublimate and disperse ink on to paper. Furthermore, a variety of direct full-color printers have been
commercialized that vividly reproduce cyan, magenta and yellow on media without using a ribbon.
However, the equipment is more unwieldy and complex owing to the high cost of printing media and the
need to affix ink on the printing surface.
On the other hand, the ink jet method has a number of problems, including the use of ink dyes that can
clog printer heads, ink leaking when the printer is carried, and a limit on the number of printable pages
depending on ink cartridge size. The wax thermal-transfer method uses a film-based pigment-type ink
ribbon, is able to preserve beautiful pictures rivaling that of conventional photographs without fading due
to exposure to ultraviolet light, and features technology that is relatively easy to miniaturize.
Alps has extended the merits of wax thermal-transfer printing, and is making efforts to further advance
product development. The Company announced a portable, compact photo printer mechanism for use
with various digital devices.
Advanced Compact Photo Printer PTMTL28/27/14
Alps' compact photo printer mechanisms (compact photo printers) in the PTMTL28/27/14 series
comprise three types for three paper sizes-A9, business-card size and credit-card size. All types use the
wax thermal-transfer method and the same mechanisms, including gear drive mechanisms. The series
features a printer head width and chassis that conform to paper size for greater variety in design.
These products were preceded by the compact photo printer PTMTL25, a wax thermal-transfer printer
announced in 2000. Designed for business-card size paper, the PTMTL25 offers battery operation, low
energy consumption and compact, slim dimensions of 82.5 mm (D) x 61.1 mm (W) x 17.7 mm (H). The
model has gained attention for its ability to be incorporated in such devices as digital video cameras.
Based on the PTMTL25, the PTMTL28/27/14 series features further advancements in energy
conservation, faster printing speeds and more photo-realistic images due to improved resolution.
III. PTMTL28/17/14-Born of Proprietary Technologies and Creative Techniques
Controlling Heat Flow-Development of High Thermal-Efficiency Printer Heads for Lower Energy
Consumption
[Optimal Substrate Layer Construction and Materials]
The thermal-transfer method melts ink on the ink ribbon by generating heat on the printer head. The
melted ink is transferred to paper (or other printing media) by applying pressure, forming a dot.
Principle of Thermal-Transfer Method
Accordingly, it is important to efficiently concentrate heat generated by the heating elements of the
printer head on the part of the ink ribbon to be melted. In other words, a key factor is reducing the
amount of heat that escapes from the heating element.
Alps analyzed the phenomenon of heat escape in milliseconds and the thermal flow from heating
elements towards the substrate (heat-sink ). The results demonstrated how to produce an ideal substrate
layer construction and materials, and succeeded in the development of print heads that minimize heat
flow towards the substrate.
Thermal Flow from Heating Elements
[Electrode-Extension Printer Head]
Alps has also focused efforts on the electrode construction of print head to conform to ideal substrate
layer construction and materials.
Generally, the line thermal-transfer method uses convex-shaped heating elements to stabilize adherence
between the printing media and ribbon. However, the slopes of the convex element do not contact the ink
ribbon and printing media. In short, heat escaping from these slopes is wasted, creating the heat escape
phenomenon.
To minimize heat escape, the electrode-extension of print head, which features an electrode thin enough
to not interfere with the heating element, prevents heat escape and helps to increase thermal efficiency.
Minimization of Heat Escape Using Convex-Shaped Heating Element
As shown above, we reduced power consumption of the print head by approximately 35%, compared
with the PTMTL25, by using a high thermal-efficiency print head combining ideal substrate layer
construction and materials as well as an electrode-extension print head.
Controlling the Flow of Electricity-Low Power with Improvements to Current Flow to Print Head
[Distributed Current Control Technology for Print Heads]
The method of controlling current flow to the print head employs distributed power to split a number of
currents.
When increasing power distribution without changing printing speed, the pulse width per dot is
inevitably shortened, and the dot radius transferred becomes smaller. To compensate for the reduction,
the print head is powered with high voltage while appropriately adjusting the dot radius.
In this case, the pulse width is short with high voltage, so power consumption does not appear to change
considerably. However, the time to transfer heat from the heating elements to the print head substrate is
shortened, since heat is generated at high temperature in a short amount of time. In short, the ratio of heat
escaping to the substrate is lessened, improving thermal efficiency of the ink ribbon. This results in a
remarkably high thermal transfer with ink highly responsive to heat.
In addition to the development of a high thermal-efficiency printing head and improvements in currentflow methods, Alps focused efforts on reducing load by reviewing motor and mechanism operation, and
lowered load to approximately one half that of previous motor power. As a result, power consumption
for the entire printer was reduced by more than 50% that of previous models, a remarkable achievement.
Accordingly, card-sized printers are able to operate sufficiently on battery power with power
consumption of 7 W (peak), and printing time per page of 90 seconds, an improvement of 40%, to realize
energy-saving, high-speed printing. In addition, Alps is advancing development to achieve printing
speeds of less than 60 seconds.
Aiming for Conventional Photograph Quality... Refining Micron (m) Order Radius for Higher
Resolution
[Improving Scale Reproduction]
To achieve color reproduction like that of conventional photographs, Alps employs the variable-dot
thermal-transfer printing method. This method controls pulse width per dot on the printing head,
changing the dot radius to small for bright portions of the image and large for dark portions, realizing
velvet smooth colors. To create photo-realistic images, it is necessary to control dot radius on 256 scales
(gradations).
Until now, the brightest portions of images had a "bumpy" feel to the eye as a result of printing in areas
with dots of small diameter. This was a serious problem because as the dot radius grows smaller the
amount of heat generated lessens, and the dot radius ends up scattering widely as a result of having to
control the heat spread over the surface of the more precise heating elements.
To solve this problem, Alps analyzed the temperature convection of the heating elements of the printer
head and developed an innovative high-precision printing head with a construction able to stably realize
an optimal thermal spread to transfer small dots. By using this printer head and a highly sensitive thinfilm ribbon, Alps was able to considerably improve the stability of tiny dots.
Furthermore, variations in dot radius are controlled by restricting dispersion of contact pressure of the
printing head on the paper through the use of special paper with high smoothness and a high-cushion
printing surface.
Moreover, minute changes in dot radius are controlled in 256 gradations, and are highly susceptible to
such mechanical factors as unevenness in paper movement and contact pressure, as well as such external
thermal factors as accumulated heat in the printer head and external usage temperature.
Alps reviewed from scratch the construction and precision of its mechanical drive systems and transfer
technology, and employed dot-control methods that minimize the impact of the aforementioned factors
on the image. The Company also solved external thermal factors by making extremely fine corrections to
current flow through precise simulations.
As a result of these efforts, the smallest stable dot radius was reduced from the previous 35m to 15m,
enabling the smooth reproduction of gradations without unevenness between areas of brightness and
darkness.
Variable-dot Method as Seen After Printing
Variable-dot printing 254LPI
Offset printing 175LPI
(Identical to art paper used for catalogs and
posters)
[Gloss Over Prints Glossy Overcoat Printing]
Dye sublimation and thermal-transfer methods often apply an overcoat of transparent ink after cyan,
magenta and yellow (CMY) printing to give printed images a glossy look and ensure their preservation.
To recreate a glossy feeling like that of conventional photographs, it is necessary to coat the surface after
printing with a few
m of overcoat, which normally contains
semi-hard resins. However, these resins require a significant amount of transfer energy, making low
power consumption difficult.
Alps reviewed materials used in the overcoat and developed an overcoat that ensures both low energy
consumption and a glossy look by blending different materials with a high degree of softness and thermal
resistance.
@By optimizing the overcoat ink and dot density of print head, the Company was able to improve
glossiness to 80-90% that of conventional photographs, compared with 40-50% in previous methods.
[Improvements to Ink Ribbon Pigments]
The optical density of image produced by conventional printers is approximately 1.6, insufficient to
reproduce image quality rivaling that of conventional photographs in terms of contrast and image
smoothness. Owing to improvements in the type of ink ribbon pigments and dispersion technology, an
optical density of 1.9 to 2.0 can be achieved, compared with 1.8 to 2.3 for dye sublimation methods.
Thermal Transfer
Engineers have made thermal technology more independent of the paper or printing medium
by moving the image-forming substance from the paper to a carrier or ribbon. Instead of
changing a characteristic of the paper, these machines transfer pigment or dyes from the carrier
to the paper. The heat from the print head melts the binder holding the ink to the carrier,
allowing the ink to transfer to the paper. On the cool paper, the binder again binds the ink in
place. In that the binder is often a wax, these machines are often called thermal wax transfer
printers.
These machines produce the richest, purest, most even, and most saturated color of any color
print technology. Because the thermal elements have no moving parts, they can be made
almost arbitrarily small to yield high resolutions. Current thermal wax print engines achieve
resolutions similar to those of laser printers. However, due to exigencies of print head designs,
the top resolution of these printers extends only in one dimension (vertical). Top thermal wax
printers achieve 300 dots per inch horizontally and 600 dots per inch vertically.
Compared to other technologies, however, thermal wax engines are slow and wasteful. They
are slow because the thermal printing elements must have a chance to cool off before
advancing the 1/300 of an inch to the next line on the paper. And they are wasteful because
they use wide ink transfer sheets, pure colors supported in a wax-based medium clinging to a
plastic film base—sort of like a Mylar typewriter ribbon with a gland condition. Each of the
primary colors to be printed on each page requires a swath of inked transfer sheet as large as
the sheet of paper to be printed—that is nearly four feet of transfer sheet for one page.
Consequently, printing a full-color page can be expensive, typically measured in dollars rather
than cents per page.
Because thermal wax printers are not a mass market item and each manufacturer uses its own
designs for both mechanism and supplies, you usually are restricted to one source for
inksheets—the printer manufacturer. While that helps assure quality (printer makers pride
themselves on the color and saturation of their inks), it also keeps prices higher than they might
be in a more directly competitive environment.
For color work, some thermal wax printers give you the choice of three- or four-pass transfer
sheets and printing. A three-pass transfer sheet holds the three primary colors of ink—red,
yellow, and blue—while a four-color sheet adds black. Although black can be made by
overlaying the three primary colors, a separate black ink gives richer, deeper tones. It also
imposes a higher cost and extends printing time by one-third.
From these three primary colors, thermal wax printers claim to be able to make anywhere from
seven to nearly seventeen million colors. That prestidigitation requires a mixture of transparent
inks, dithering, and ingenuity. Because the inks used by thermal wax printers are transparent,
they can be laid one atop another to create simple secondary colors. They do not, however,
actually mix.
Expanding the thermal wax palette further requires pointillistic mixing, laying different color
dots next to each other and relying on them to visually blend together in a distant blur. Instead
of each dot of ink constituting a picture element, a group of several dots effectively forms a
super-pixel of an intermediate color.
The penalty for this wider palette is a loss of resolution. For example, super-pixels measuring
five by five dots would trim the resolution of a thermal wax printer to 60 dots per inch. Image
quality looks like a color halftone—a magazine reproduction—rather than a real photograph.
Although the quality is shy of perfection, it is certainly good enough for proofs of what is
going to a film recorder or the service bureau to be made into color separations.
A variation of the thermal wax design combines the sharpness available from the technology
with a versatility and cost more in line with ordinary dot matrix printers. Instead of using a
page-wide print head and equally wide transfer sheets, some thermal wax machines use a linehigh print head and a thin transfer sheet that resembles a Mylar typewriter ribbon. These
machines print one, sharp line of text or graphics at a time, usually in one color—black. They
are as quiet as inkjets but produce sharper, darker images.
Thermal Transfer
Thermal transfer is a wonderful printing process for printing on-demand labels. In this area,
we can help you two different ways. We can make the labels for you using our in-house
printers, or we can sell you the printer, software, ribbon and blanks and you can make your
own. Naturally, if you need 1000 asset tags and that will do it, you should have us do the
printing. However, if you have inventory, mailing, UPS, asset, product, and other labels in
any volume, you will find that printing them yourselves will save money.
There are two major types of thermal printing; direct thermal, or thermal transfer. An example
of direct thermal is the price tags put on in the meat department of your local grocery store.
The counter clerk weighs the meat, presses a couple of buttons, and a price tag pops out with
an UPC barcode on it to be scanned at the checkout register. The principle behind direct
thermal is that the label material has a top coating on it that reacts to heat. When heat is in
contact with the paper, it turns black. No ribbon is used in this process. The problem with
printing permanent labels with this system is that prolonged exposure to direct sunlight will
turn the entire label black, which makes the printing hard or impossible to read. This type of
printing is not recommended for inventory, asset, product and other permanent labels.
Thermal transfer printing uses a ribbon and media that is topcoated to receive the ribbon. The
media can be paper, polyester, nylon, acetate, tag stock and synthetic film. The ribbons are
produced in three basic categories, namely wax, wax/resin, and resin. The wax ribbons are
mainly used on paper, although some synthetics can take wax. Wax/resin is used on many
synthetics and films. Resins are not used on papers, and all films require resin for
permanence. The difference in the ribbons is cost to the end user. Wax is the least expensive,
and some resins are extremely expensive. The key to which ribbon to use with what material
is to ask us first, and if we don't get the answer from our engineers or suppliers, then lets test
the different options in your environment. We give away a bit on time doing it this way, but
the solution we end up with is the correct one because you are the final judge. Testing is free,
so it's a good policy to test before purchase. Resin ribbon on polyester or other synthetic films
is outdoor durable, waterproof, fade resistant, and rugged. Many of our products are UL
recognized. The ribbons come in black and also colors.
Once upon a time the standard resolution for all thermal printers was 203 dpi (dots per inch).
Technology has changed that, and the Citizen 6401 CLP thermal printer (which we sell
www.citizen-america.com) prints at 400 dpi at speed of 4 inches per second. Most laser
printers print at 300 dpi, so the resolution is terrific. If you have critical pieces that need to be
printed on demand, this printer is exactly what the doctor ordered. If fine detail is not
required, we have a 203 dpi printer that has a small footprint and is extremely easy to install
and use that will answer a lot of questions.
We also sell the software (Labelview from Teklynx) and the scanners, wands, and other
readers and accessories (From ITSCO) that help make barcoding a reality.
If you purchase Labelview, we will be more than happy to program your early layouts and
email them to you to get you up and running faster. We can also talk you through all kinds of
issues and speed things up for you over the phone. If you have room in your extra bedroom
and want a house guest for a day or two, we might even send one of our engineers. In any
event, thermal is the future, and we are here to help you get there.
Materials & Tools:
Ribbons (wax, resin, wax/resin)
Benefits:
Simplicity in equipment and materials
Quick setup and on-demand application
Excellent for short runs of variable labels
Limitations:
Limited to smooth substrates
Limited printer width
One to one - ribbon to label usage. Cannot reuse the ribbons.
Applications:
Barcode and serialization labels
POS tags and labels
Tickets
Smart cards/ ID cards
Blood examination labels
Inventory control labels
Hang tags
Parking Permits
CD and diskette labels
Packaging and shelf marking
Chemical drum labels
ID cards & electronic labeling
Durable goods labeling
Manufacturing process control labels
Car parts assembly process labels
Printed Circuit Board manufacturing process control labels
Transportation control labels
Automatic distribution control labels
Thermal Printer Technology
Thermal Transfer
How they work
A Thermal Transfer printer uses a thin plastic ribbon with a thin coating of wax or resin based
pigment. The ribbon and labels feed from separate rolls and are squeezed together by a roller
as they pass under the thermal printhead . The heating elements in the printhead melt the
coating which transfers to the label to form the image.
Pros & Cons
Produces a durable, high-quality image, and can be used with many types of label stocks
(paper and synthetics). Printers are durable and offer relatively fast printing speeds; some
models approach 12 inches per second. As speed, dot per inch resolution, and maximum print
width go up, printer cost can climb rapidly. Cost of printing a single color (usually black) is
reasonable, but multi-color printing can be expensive in terms of printer cost and consumption
of ribbons.
Applications
Excellent for producing product and packaging labels either on demand or in batches. The
ability to print on synthetic stocks (eg. gloss coated polyester) makes it possible to produce
UL/CSA equipment rating plates and serial number labels.
Thermal-dye transfer printers are often called dyesublimation or dye-diffusion thermaltransfer printers. This system provides high quality and an environmentally safe method of
transferring images to print and transparency materials without using chemical fig. 3-10 .
The thermal-dye transfer printing process uses thousands of tiny heating elements that come
in contact with "donor ribbons." Each donor ribbon releases a gaseous color dye when heated.
Three-color printers have cyan, magenta, and yellow ribbons (CMY); four-color printers also
include a separate black ribbon (CMYK). The amount of heat from each element
Figure 3-10.-Kodak 7720 thermal-dye transfer printer.
controls the amount of dye being transferred to the print material. The blend of the gaseous
colors creates a continuous-tone image.The quality of a thermal-dye transfer print resembles a
print made from conventional silver-halide paper. The resolution of thermal-dye transfer
printers ranges from 160 to 300 dpi. Resolution is limited by the thermal printing head.
Thermal-dye transfer printers can produce prints from 3.5 by 5 inches up to 14 by 17 inches.
Zebra bar code printer Direct Thermal - Thermal Transfer
KODAK PROFESSIONAL 8660 Thermal Printer
Superior color. Durable performance. Outstanding prints.
Deliver true professional quality
photographic prints that last.
Whether it’s in a professional
studio, theme park or at the mall–
indoors or out, the KODAK
PROFESSIONAL 8660 Thermal
Printer gives you the quality,
consistency,
durability
and
reliability you need This latest
•
True photographic quality: the look
and feel of traditional prints
•
Matte and gloss finishes
•
Multiple output sizes & package
templates
•
Rugged cast metal frame—high
printer in the award-winning 8600
thermal dye printer line is ideal for
independent photographers and
studios doing digital portraiture,
event photography and retail
studios. Its cast metal frame was
designed for rugged use to provide
you
with
the
dependable
performance vital to your business.
The 8660 printer produces 5 x 7inch or 8 x 10-inch laminated
prints in just over a minute and,
unlike inkjet, require no postprocessing to ensure image
stability.
With
KODAK
PROFESSIONAL EKTATHERM
XTRALIFE Matte Three-Color
Ribbon, the 8660 printer can
deliver matte finish output at your
fingertips. Matte that is comparable
to
N-surface
prints.
No
compromises–just quality.
reliability
•
Simple loading
•
Easy network connectivity options
•
Enclosed design for highest quality
prints
Bestseller noch schneller: der Thermodrucker TMT88III von EPSON
Der neue High-Speed Thermobondrucker ist der
Nachfolger des leistungsstarken und beliebten TMT88II. Er vereint alle Vorteile seines Vorgängers,
übertrifft dessen Druckgeschwindigkeit jedoch
erheblich. Dank des internen Speichers, der über 256
KB verfügt, druckt der TM-T88III auch Firmenlogos
oder besondere Angebote äußerst schnell und
zuverlässig.
Mit 150 mm bzw. 47 Zeilen pro Sekunde und bis zu
38400 bps Übertragungsgeschwindigkeit spart der neue
Thermodrucker von EPSON wertvolle Zeit beim
Schnell und kompakt Kassiervorgang und verhindert so unnötige und
unbeliebte Wartezeiten für den Kunden. Dies gilt auch der TM-T88III in lichtgrau
für den Papierwechsel. Mit drei Handgriffen ist die neue
Papierrolle im bewährten Drop-in-Verfahren schnell
und problemlos eingelegt: Drucker öffnen, Papierrolle
einlegen, Drucker schließen. Dadurch erleichtert er
nicht nur das Arbeiten an der Kasse, sondern reduziert
auch die Einarbeitungszeit des Kassenpersonals auf ein
Minimum.
Wie alle Thermodrucker arbeitet der TM-T88III
besonders leise und liefert ein hervorragendes
Druckbild. Sowohl vertikale als auch horizontale
Barcodes druckt der Neue in hochauflösender Qualität.
Dadurch ergibt sich ein optimales Leseergebnis mit
Barcode-Scannern, und Lesefehler können vermieden
werden. Mit seiner Druckleistung von 52 Millionen
Zeilen oder 360.000 Stunden bietet der TM-T88III ein
Maximum an Zuverlässigkeit und reduziert
druckerbezogene Kassenausfälle auf ein Minimum. Ein
großes Plus ist auch die Kompatibilität zum TM-T88II:
Um den neuen Thermodrucker zu installieren, sind
weder ein aufwendiges Software-Update noch andere
technische Umstellungen notwendig. Der TM-T88III
kann einfach anstelle des Vorgängermodells
hier die Variante in
angeschlossen werden.
anthrazit
Der neue Thermodrucker von EPSON verfügt
(EPSON "dark grey")
serienmäßig über eine wechselbare PC-Schnittstelle und
über eine Schnittstelle zum automatischen Öffnen von
ein bis zwei Kassenschubladen. Ein Novum bei EPSON
ist die standardmäßige Aus-stattung des TM-T88III mit
dem Netzteil, dem neuen Power Supply PS-180, das im
Vergleich zum Vorgänger PS-170 kleiner, leichter und
kostengünstiger geworden ist.
der millionenfach bewährte
Papierrollenwechsel
EPSON bietet mit dem TM-T88III die ideale Drucklösung für alle Handelsbereiche und
Dienstleistungsunternehmen, die hohen Wert auf schnellen, scharfen und nahezu lautlosen
Druck legen.
Schnell und Leise
Mit dem TM-T260F Thermodrucker bietet EPSON BonDer schnelle 2-fach-Thermound Journaldruck in Hochgeschwindigkeit. Beim
drucker für Fiskallösungen
Bondruck er-reicht der Spezialist für fiskalisierte POSLösungen 150 Milli-meter pro Sekunde, beim
Journaldruck kommt er auf 100 Millimeter in der Sekunde.
Was bisher überwiegend nur Nadeldrucker konnten, ist für
den neuen Thermodrucker kein Problem mehr: den
gleichzeitigen Druck von Bon und Journal - und das mit
einer Ge-schwindigkeit von 100 Millimetern in der
Sekunde. Damit ist er wesentlich schneller als ein
Nadeldrucker und außerdem sehr viel leiser.
Bedienungsfreundlich, kompakt und flexibel
Wie alle EPSON Kassendrucker ist auch der TM-T260F
äu-ßerst leicht in der Bedienung. Dank seines funktionalen
Front-ladesystems mit dem bewährten Drop-in-Verfahren
ist der Bonrollenwechsel im Handumdrehen erledigt. Neigt
sich eine der Papierrollen dem Ende zu, wird das
Kassenpersonal rechtzeitig von den Papiersensoren
darüber informiert. So kann früh genug Nachschub für den
Wechsel der Papierrollen bereitgehalten werden. Darüber
hinaus ist der TM-T260F mit einem integrierten
Papierabschneider ausgestattet, der jeden Bon schnell und
sauber zuschneidet.
Mit einer Stellfläche von nur 14 x 30 cm beansprucht der
neue Thermodrucker so wenig Raum, dass er in seinem
kompakten Design für jede Ladeneinrichtung geeignet ist.
Der Bon- und Journaldruck verläuft nahezu geräuschlos
und das gestochen scharfe Druckbild kann sich sehen
lassen.
Der TM-T260F wird ohne Interface geliefert und in den
jewei-ligen Ländern ausschließlich über kompetente,
lokale Syste-mintegratoren vertrieben. Sie statten den
Drucker mit der entsprechenden Fiskallogik aus und lassen Der frontseitige Drop-in
Papier rollenwechsel ist ein
ihn bei den jewei-ligen Landesbehörden abnehmen.
Kinderspiel
Mit dem TM-T260F fügt EPSON seiner erfolgreichen
Drucker-Palette eine neue Spezial-Lösung zu, die für
Das Journal wird automatisch
hohes Drucktempo und beste Druckqualität bei
mitgeführt
fiskalisierten POS-Lösungen steht. Damit ist der neue
Thermodrucker bestens für Handelsketten geeignet, die in
Länder mit fiskalisiertem POS expandieren.
ADRESY:
http://www.howstuffworks.com/fax-machine.htm
http://www.tpub.com/photographyadv/39.htmThermal-Dye Transfer Printers
http://www.pcwebopaedia.com/TERM/C/color_printer.html
http://www.amerbar.com/catalog/z4m.asp
http://www.alps.co.jp/technology/2001/oct/page3_e.htm
http://www.alps.co.jp/technology/2001/oct/page4_e.htm
http://www.identigraphics.com/thermal2.htm
http://www.worldofspectrum.org/hardware/featc.html
http://www.able-systems.com/mini-printers.html
http://www.epson.de/rsd/german/product/tm/thermo/tm-t260f/
http://www.epson.de/rsd/german/product/tm/thermo/tm_t88iii/
http://80211-planet.webopedia.com/TERM/T/thermal_printer.html
http://www.makebarcode.com/printers/thermal.html
http://www.currys.com/knowledge/picture.html
http://www.nalanda.nitc.ac.in/resources/cse/ebooks/HardwareBible/wrh20.htm#E70E621
http://www.kodak.com/global/en/professional/products/printers/8660/8660.htm
http://www.printers.ibm.com/R5PSC.NSF/Web/fs4400
http://www.racoindustries.com/dataxl.htm
http://www.zilog.com/docs/z8/appnotes/therprt.pdf
http://www.microcomcorp.com/printers.html
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