US Patent No: 7,796,936

Number of patents in Portfolio can not be more than 2000

Image forming device with multimode duplexer

ALSO PUBLISHED AS: 20070014610

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Abstract

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An image forming device in a color printer or the like includes duplex printing. Multiple media sheets are moved through a media path which includes a primary path and a duplex path. Various parameters of the image forming device control the interpage gap between sheets. Parameters include peek-a-boo duplexing, sharing of motors within the drive rollers, and sharing of power supplies.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
LEXMARK INTERNATIONAL, INC.LEXINGTON, KY1540

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Carter, Daniel L Georgetown, KY 56 206
Cook, William Paul Lexington, KY 84 423

Cited Art Landscape

Patent Info (Count) # Cites Year
 
XEROX CORPORATION (10)
4,918,490 Batch mode duplex printing 46 1989
5,095,342 Methods for sheet scheduling in an imaging system having an endless duplex paper path loop 178 1990
5,159,395 Method of scheduling copy sheets in a dual mode duplex printing system 159 1991
5,184,185 Method for duplex printing scheduling system combining finisher interset skipped pitches with duplex sheet scheduling 31 1991
5,504,568 Print sequence scheduling system for duplex printing apparatus 158 1995
5,729,790 Operation scheduling system for a digital printing apparatus using a tree of possible schedules 21 1997
5,812,273 Operation scheduling system for a digital printing apparatus, using a table of executed operations to revise a schedule in real time 15 1997
6,097,500 Operation scheduling system for a digital printing apparatus, where new constraints can be added 15 1998
5,930,577 Registering images on the front and on the back of a substrate using high resolution sheet measurement 29 1998
6,064,840 Method and apparatus for scheduling duplex copy jobs by shifting copy sheet into an available pitch to create a skipped pitch between copy sets 4 1999
 
RICOH COMPANY, LTD. (4)
4,990,965 Image forming apparatus having duplex unit 25 1989
5,095,371 Duplex image forming system with number of single side printed sheets in feed path selected before printing second side 24 1990
5,132,719 Method and apparatus for duplex printing wherein the interleave number changes in response to detected sheet length change 11 1991
6,411,795 Image forming apparatus with a two-sides image forming operation 15 2001
 
CANON KABUSHIKI KAISHA (1)
6,539,198 Image forming apparatus, control method of the image forming apparatus and storage medium 7 2001
 
INTERNATIONAL BUSINESS MACHINES CORPORATION (1)
4,488,801 Maximum throughput duplexing system for xerographic machines 14 1983
 
MINOLTA CO., LTD. (1)
5,703,693 Digital copy machine allowing duplex copying in short time through novel recirculation timing 19 1994
 
OCE-TECHNOLOGIES B.V. (1)
6,069,704 Method of scheduling a sequence of pages to be printed with a duplex printer 12 1997

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Maintenance Fees

Fee Large entity fee small entity fee micro entity fee due date
3.5 Year Payment $1600.00 $800.00 $400.00 Mar 14, 2014
7.5 Year Payment $3600.00 $1800.00 $900.00 Mar 14, 2018
11.5 Year Payment $7400.00 $3700.00 $1850.00 Mar 14, 2022
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Surcharge - 3.5 year - Late payment within 6 months $160.00 $80.00 $40.00
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Surcharge - 11.5 year - Late payment within 6 months $160.00 $80.00 $40.00
Surcharge after expiration - Late payment is unavoidable $700.00 $350.00 $175.00
Surcharge after expiration - Late payment is unintentional $1,640.00 $820.00 $410.00

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