Allen K Johnson

US Patent:

7206012, Apr 17, 2007

Filed:

Mar 24, 2004

Appl. No.:

10/808043

Inventors:

William P. Cook - Lexington KY, US
Thomas A. Fields - Winchester KY, US
Allen P. Johnson - Lexington KY, US
Christopher D. Jones - Georgetown KY, US
Gregory L. Ream - Lexington KY, US

Assignee:

Lexmark International, Inc. - Lexington KY

International Classification:

B41J 2/47
B41J 2/435

US Classification:

347234, 347245

Abstract:

An optical scanner is provided having a memory device thereon. The memory device may store operational characteristics of the optical scanner or data that characterizes laser beam scan path and/or laser power requirements by each laser of the optical scanner. The memory device may be used to store historical information such as device temperature, cycles of operation and other historical information of components within a corresponding electrophotographic device. Still further, the electrophotographic device to which the optical scanner is installed may write operational data to the memory device, for example, to store a backup of registration and other operational parameters that are typically stored by the controller of the electrophotographic device.

US Patent:

7349123, Mar 25, 2008

Filed:

Mar 24, 2004

Appl. No.:

10/807870

Inventors:

Cyrus B. Clarke - Lexington KY, US
Thomas A. Fields - Winchester KY, US
Allen P. Johnson - Lexington KY, US
Christopher D. Jones - Georgetown KY, US

Assignee:

Lexmark International, Inc. - Lexington KY

International Classification:

H04N 1/40

US Classification:

358 19, 358504

Abstract:

Systems and methods are provided for characterizing laser beam process direction position errors in an electrophotographic device. Once the process direction position errors of a given beam laser beam system have been characterized, an image is adjusted or warped prior to being processed by the laser beam system to compensate for laser beam process direction position errors, e. g. , bow and skew.

US Patent:

7375738, May 20, 2008

Filed:

Mar 24, 2004

Appl. No.:

10/808155

Inventors:

William P. Corbett - Lexington KY, US
Thomas A. Fields - Winchester KY, US
Allen P. Johnson - Lexington KY, US
Christopoher D. Jones - Georgetown KY, US

Assignee:

Lexmark International, Inc. - Lexington KY

International Classification:

B41J 2/435
B41J 2/47

US Classification:

347234, 347248

Abstract:

Systems and methods are provided for electronically adjusting an image to compensate for laser beam process direction position errors in an electrophotographic device. Initially, a bow profile is defined that characterizes the process direction position errors of a laser beam across a scan line. The device subsequently reads an image to be printed from a first memory location, performs pixel shifts on select columns thereof based upon the bow profile, and temporarily stores the adjusted image data to a second location of memory. The adjusted image data is then communicated to a printhead of the device.

US Patent:

59702753, Oct 19, 1999

Filed:

Jun 12, 1998

Appl. No.:

9/096890

Inventors:

Martin Joseph Brown - Lexington KY
Allen Patrick Johnson - Lexington KY
Patricia Ann Valenti - Lexington KY
Earl Dawson Ward - Richmond KY
Timothy Gerard Yorkey - Lexington KY

Assignee:

Lexmark International, Inc. - Lexington KY

International Classification:

G03G 1508

US Classification:

399 27

Abstract:

The amount of toner remaining in each toner cartridge (20a-20d) of a printer (1) is estimated by incrementing a count when one pel is detected in each small region of the bit map. The printer senses toner out, after which the scale ascribed to one count is revised to reflect the actual count to toner out. Specifically, the count to toner out becomes the number representative of empty so that one-half of that count is interpreted as half full. The remaining toner in each cartridge is displayed to the operator at a gauge (21).

US Patent:

55615287, Oct 1, 1996

Filed:

Aug 3, 1994

Appl. No.:

8/285574

Inventors:

Allen P. Johnson - Lexington KY
Christy A. West - Versailles KY
Edward W. Yohon - Lexington KY

Assignee:

Lexmark International, Inc. - Greenwich CT

International Classification:

H04N 121
G06F 1500

US Classification:

358296

Abstract:

Printer (1) is provided with a mode to print forms without reference to or interruption of a host computer and with immediate printing of one or more of the forms. Page data for the forms is stored in flash memory (21) in a high level printer language. At initiation of the forms mode at least the first listed document is immediately prepared by the control data processor (17) of the printer in bit mapped form for printing. Documents are listed on the control panel by name for ready selection for printing.

US Patent:

59872292, Nov 16, 1999

Filed:

Nov 26, 1997

Appl. No.:

8/978882

Inventors:

Michael Donald Bender - Lexington KY
Cuong Manh Hoang - Lexington KY
Allen Patrick Johnson - Lexington KY
Gregory John Sherwood - Littleton CO
Aaron Charles Yoder - Lexington KY

Assignee:

Lexmark International, Inc. - Lexington KY

International Classification:

G06F 1500

US Classification:

395114

Abstract:

For a multiprocess application including a plurality of work stations at which the application processes proceed simultaneously, such as a printer including serially aligned laser and inkjet print engines, a method of controlling job throughput includes providing a queue for each work station, providing job data to the queues for a plurality of jobs, and consecutively tracking for the jobs the progress of the process corresponding to the rate-determining step for the application for each of the jobs so that as each job is completed at a particular work station the work station begins the process of the work station for the next job.

US Patent:

63172186, Nov 13, 2001

Filed:

Feb 8, 2000

Appl. No.:

9/500402

Inventors:

Timothy Gerard Yorkey - Lexington KY
Allen Patrick Johnson - Lexington KY
David William Murphy - Lexington KY
Christy Mitchell West - Hendersonville TN

Assignee:

Lexmark International, Inc. - Lexington KY

International Classification:

G06F 1500

US Classification:

358 113

Abstract:

A printer has monochrome and color printing heads for printing color and monochrome images, respectively, and a media feed path for moving sheets of media by the printing heads. The media feed path has a color position in which the color printing heads print color images and the monochrome printing head prints monochrome images, and a monochrome position in which the monochrome printing head prints monochrome images but the color printing heads cannot print color images. A memory stores data on prior print jobs, and a control circuit switches the media feed path from the color position to the monochrome position in response to the data stored in the memory.

US Patent:

57174997, Feb 10, 1998

Filed:

Aug 25, 1995

Appl. No.:

8/519495

Inventors:

Allen Patrick Johnson - Lexington KY
David William Murphy - Lexington KY

Assignee:

Lexmark International, Inc. - Lexington KY

International Classification:

H04N 140

US Classification:

358444

Abstract:

Printer (1) has the capability of printing in either 600 by 600 dpi resolution or 300 by 300 dpi under control of data processor controller (17). Bit maps for printing are stored in memory (19). When complex pages require more memory than is available, information from groups of bits in the 600 by 600 bit map is used to define the significance of one bit in a 300 by 300 bit map and the page is printed in the 300 by 300 bit map. This avoids terminating printing or printing partial pages and the difference in images are minor.