OKI MICROLINE 420/421
®
®
9-Pin Impact Printers
Reliable,
fast and
easy to use.
Narrow carriage
MICROLINE 420
Highlights:
Rated at 20,000 hours MTBF
This rugged dedicated forms printer
is backed by a 3-Year standard warranty.
3-Year standard warranty
Print speeds up to 570 cps 1
Integrated USB and IEEE Parallel connectivity
standard
Optional OkiLAN® 6120i 10/100 Base-T Ethernet®
internal print server
Crisp, clear printing on 6-part forms
Expandable head gap – accommodates multipart forms and cut-sheet stock including labels
and stiff index stock
128 KB receive buffer/memory
4 million-character ribbon life
200-million character printhead life
Small footprint – ideal for retail countertops
Uses the same accessories as
ML320/321 Turbo Series
1
SuperSpeed Draft Mode.
It’s designed for commanding performance in
demanding environments.
The OKI® MICROLINE® 420 9-pin printer and its
wide-carriage counterpart ML421 are a quantum leap
forward in Impact printer performance.
Engineered for dedicated forms printing in the most
demanding point-of-sale, automation and utility
environments, ML420/421 printers are right at home
in applications such as retail sales counters, medical
facilities, automotive rental and repair shops, airline
boarding gates, financial departments and manufacturing sites. Their print speed and versatile paper
handling make them ideal for the office, too.
Performance is built in. The ML420/421 sport
features that give them a strong edge over their
predecessors as well as the competition:
• 3-piece top cover provides easy access and
unsurpassed break resistance
• An internal cooling fan provides continuous airflow
for the printhead—maximizing throughput
productivity for long, unattended print jobs
• Additional feed rollers provide precise forms
handling and printed-character placement accuracy
Exceptional paper-handling versatility. The
ML420/421 have a zero-tear feature that accurately
positions continuous forms for a clean tear at the
perforation, which eliminates wasted stock. You also
get perfect results with single sheets, index stock,
labels and envelopes, too. All without jams or smears.
Value that goes the distance. The OKI ML420/421
deliver the kind of productivity usually reserved for
printers many times the price—starting with a superfast print speed of 570 characters-per-second (in
SuperSpeed Draft mode).
Then there’s the rugged printhead—with its
200-million character life, powerful samarium cobalt
magnets and stored-energy pins— delivering precise,
sharp characters all the way through to the last
page of a 6-part form. And the patented OKI
closed-loop feedback system that assures character
placement accuracy.
The OKI ML420/421: Just turn ‘em on and
turn ‘em loose.
OKI MICROLINE 420/421
®
®
9-Pin Impact Printers
Built to last, inside and out. Field-proven reliability
is just one reason OKI® MICROLINE® impact printers
are the most widely-used in North America.1
The performance-optimized power supply of the
ML420/421 has been enlarged to easily handle
harsh printing conditions—and its energy
management capabilities match power expenditures
to print-job size, maximizing the life of the 9-pin
printhead and other components. A long-lasting
rack-and-pinion drive system ensures print quality
longer than belt or cable systems. And the
ergonomically-designed, impact-resistant chassis
protects the ML420/421 from damage, even in the
toughest working environments.
Performance that’s user-friendly. Controls are
conveniently placed on the front panel for fast
access. The automatic loading of continuous and cut
stock makes every print job easier, and the design of
the internal sheet separator enables easy loading of
tractor-fed paper into the rear push tractor.
OKI has a reputation for quality and reliability no
competing printer can claim—and backs it with
3 years of warranty coverage 2 and a network of
authorized OKI Dealer Service Centers and Service
Depots.
The reliable, affordable ML420/421 can
work wonders in virtually any forms-handling
application.
Specifications
Ordering Information
Technology, Speed and Print Characteristics
Description
• Printhead: 9-Pin SIDM
• Graphics Resolution: 240 (H) x 216 (V) dpi maximum
• Feed Rate: 4.5 ips (11.4 cm/sec.)
• Print Speed and Character Matrix:
Mode
NLQ
Utility
HSD
SSD
(10 cpi)
(10 cpi)
(10 cpi)
(12 cpi)
Speed (in cps)
95
380
510
570
MICROLINE 420/Parallel/120V
MICROLINE 420/Parallel/120V/Black
MICROLINE 420/Parallel/230V
MICROLINE 421/Parallel/120V
MICROLINE 421/Parallel/230V
Emulation, Interface and Memory
• Emulation: Epson® FX, IBM® ProPrinter®, OKI MICROLINE
• Interface: Standard – IEEE Parallel and USB;
Optional – RS-232C Serial and Ethernet® via OkiLAN® 6120 i
10/100 Base-T Internal Print Server (no AC power adapter
required); Twin-ax/Co-ax (Also available through 3rd Party)
• Memory: 128K
Compatibility
• Operating Systems: Windows® XP, 2000, 98/95,
3.x and NT® 4.0; MS-DOS®
Paper Handling
• Paper Input: Single-part, Multi-part, Continuous forms,
Cut sheet, Index stock, Envelopes, Labels
• Number of Copies: 6
• Thickness: 0.017" (0.43 mm) maximum
• Paper Feeding: Rear Push and Friction Feed
• Options: Bottom Push Tractor, Top Pull Tractor,
Cut Sheet Feeder, Roll Paper Stand
Warranty and Reliability
• Limited Warranty: 3-Year parts and labor, 2-Year printhead
• MTBF: 20,000 hours (25% duty cycle/35% page density)
• Reliability:
ML420 – 24,000 pg./mo. duty cycle
ML421 – 17,000 pg./mo. duty cycle
• Printhead Life: 200 million characters
• Ribbon Life: 7.5 million characters
Environmental
• Size (WxDxH):
ML420 – 15.7" x 13.6" x 6.0" (39.8 cm x 34.5 cm x 15.2 cm);
ML421 – 21.7" x 13.6" x 6.0" (55.1 cm x 34.5 cm x 15.2 cm)
• Net Weight:
ML420 – 16.4 lb. (7.43 kg); ML421 – 21.2 lb. (9.6 kg)
• Acoustic Noise: 56 dBA
• Power Requirements: 120V Model: 120 VAC +6%, -15%;
230V Model: 230 VAC +15%, -14%
Wide-carriage MICROLINE 421
To contact Oki Data Americas, Inc.
In USA: 2000 Bishops Gate Blvd.
Mount Laurel, NJ 08054-4620
Tel: 800.OKI.DATA (800.654.3282)
Fax: 856.222.5320
In Canada: 2735 Matheson Blvd. East
Mississauga, Ontario L4W 4M8
Tel: 905.238.4250
Fax: 905.238.4421
Part Numbers
62418701
91909701
62418702
62418801
62418802
Accessories
Top-Mount Pull Tractor Kit with acoustic cover:
ML420
ML421
Bottom Push Tractor Kit:
ML420
ML421
Cut Sheet Feeder
Roll Paper Stand (ML420 only)
RS-232C Serial Interface (19.2K baud max.)
OkiLAN® 6120i 10/100 Base-T Ethernet
Internal Print Server
OkiLAN® 6020e 10/100 Base-T Ethernet
External Print Server
OkiLAN 6010e 10 Base-T Ethernet
External Print Server
Self-inking Ribbon Cartridge
Co-ax Adapter
Twin-ax/Co-ax (Also available through Third Party.
Call 1-800-OKI-DATA.)
70030501
70030601
70030701
70030801
70030101
70023301
70012801
70046501
70036001
70034401
42377801
70047201
OKIcare® Overnight Exchange Warranty
Extensions 3
U.S.
OKI ML400 Series 1-Yr. Warranty Ext. 58264901
OKI ML400 Series 2-Yr. Warranty Ext. 58264902
Canada
58263111
58263112
OKIcare® Depot Warranty Extensions 3
U.S.
OKI ML400 Series 1-Yr. Warranty Ext. 58264701
OKI ML400 Series 2-Yr. Warranty Ext. 58264702
Upgrade to 3-Yr. Overnight Exchange 58264801
Canada
58265511
58265512
58264811
For more information on OKI Impact Printers and supplies, including OKIcare® Extended Service Programs:
1-800-OKI-DATA (800-654-3282).
1
Q4 2003 IDC Quarterly Tracker and Evans Research.
3-year standard warranty parts and labor/2-year printhead.
3
Available in the U.S. and Canada only.
2
All specifications subject to change without notice.
© 2004 Oki Data Americas, Inc. OKI Reg. T.M., M.D., M.R., MICROLINE,
OkiLAN, OKIcare Reg. T.M., Oki Electric Industry Co., Ltd. 7-Day/24-Hour
logo T.M., Oki Data Americas, Inc. Epson Reg. T.M., Seiko Epson Corp. IBM,
ProPrinter Reg. T.M., International Business Machines, Inc. Windows,
Windows NT, MS-DOS Reg. T.M., Microsoft Corp. Ethernet Reg. T.M., SCO.
Energy Star Reg. T.M., U.S. EPA. USB-Logo T.M. Universal Serial Bus
Implementers Forum, Inc.
In Latin America and Mexico:
2000 Bishops Gate Blvd.
Mount Laurel, NJ 08054-4620
Tel: 856.231.0002
Fax: 856.222.5071
www.okidata.com 800.OKI.DATA
Printed in the USA.
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