Christopher Shayne Adkins

US Patent:

6452512, Sep 17, 2002

Filed:

Jul 3, 2001

Appl. No.:

09/898663

Inventors:

Christopher Alan Adkins - Lexington KY
Jay William Vessels - Lexington KY

Assignee:

Lexmark International, Inc. - Lexington KY

International Classification:

H03M 122

US Classification:

341 13, 25023116

Abstract:

A method of analog encoder initialization involves repeatedly adjusting an encoder light element energization level and dc offsets of the encoder channels to produce desired signals.

US Patent:

6471319, Oct 29, 2002

Filed:

Jul 9, 2001

Appl. No.:

09/901881

Inventors:

Christopher Alan Adkins - Lexington KY
Randall David Mayo - Lexington KY

Assignee:

Lexmark International, Inc. - Lexignton KY

International Classification:

B41J 2938

US Classification:

347 11, 347 37, 400279

Abstract:

A method for synchronizing the print start position for a printer carriage on an inkjet printer that includes the steps of: (a) providing an encoder signal indicative of a position of an inkjet printer carriage relative to a substrate being printed upon or a printer platen, where the encoder signal is an alternating voltage signal with an encoder signal frequency; (b) filtering and dividing the encoder signal to provide a fire pulse signal, where the fire pulse signal is an alternating voltage signal with a fire pulse signal frequency that is a multiple of the encoder signal frequency; (c) detecting a rising edge of the encoder signal preceeding a predetermined print start position of the printer carriage; (d) upon detection of the rising edge of the encoder signal in step (c), detecting a next falling edge of the fire pulse signal; (e) upon detection of the next falling edge of the fire pulse signal in step (d), detecting a count of the next rising edges of the fire pulse signal; and (f) assigning a synchronized print start position at an end of the count.

US Patent:

6567015, May 20, 2003

Filed:

Aug 2, 2002

Appl. No.:

10/211195

Inventors:

Christopher Alan Adkins - Lexington KY
Jay William Vessels - Lexington KY

Assignee:

Lexmark International, Inc. - Lexington KY

International Classification:

H03M 122

US Classification:

341 13

Abstract:

A method of analog encoder initialization involves repeatedly adjusting an encoder light element energization level and dc offsets of the encoder channels to produce desired signals.

US Patent:

6523924, Feb 25, 2003

Filed:

Aug 16, 2001

Appl. No.:

09/930792

Inventors:

Christopher Alan Adkins - Lexington KY
Barry Baxter Stout - Lexington KY

Assignee:

Lexmark International, Inc. - Lexington KY

International Classification:

B41J 201

US Classification:

347 16

Abstract:

A method for reducing horizontal banding on media in an ink jet printer involves the step of moving the media repeatedly back and forth along a media movement path during a printing scan of at least one print head, the printing scan defined by movement of the print head across the media movement path as ink is ejected from the print head onto the media.

US Patent:

6525837, Feb 25, 2003

Filed:

Jun 29, 2001

Appl. No.:

09/895284

Inventors:

Christopher Alan Adkins - Lexington KY
Lucas David Barkley - Lexington KY

Assignee:

Lexmark International, Inc. - Lexington KY

International Classification:

G06F 1500

US Classification:

358 15, 27126502

Abstract:

A printer assembly and a method for determining the position of a printer component, such as a printer paper-feed roller, during a move of the printer component from an initial position toward a desired final position. An analog encoder is operatively connected to the printer component, and a threshold device is connected to the analog output of the analog encoder. The position of the printer component is determined from the digital output of the threshold device and a digitization of the analog output of the analog encoder.

US Patent:

6600150, Jul 29, 2003

Filed:

Jul 3, 2001

Appl. No.:

09/898325

Inventors:

Christopher Alan Adkins - Lexington KY
Lucas David Barkley - Lexington KY

Assignee:

Lexmark International, Inc. - Lexington KY

International Classification:

G01D 534

US Classification:

25023113, 25023118

Abstract:

An analog encoder system repeatedly switches back and forth between monitoring of first and second encoder output signals to track movement of a structure associated with the encoder. Switching between signals is controlled according to an upper intersection amplitude and a lower intersection amplitude of the two encoder output signals.

US Patent:

6600151, Jul 29, 2003

Filed:

Sep 19, 2001

Appl. No.:

09/956480

Inventors:

Alexander Lloyd Chapman - Lexington KY
Adam Jude Ahne - Lexington KY
Christopher Alan Adkins - Lexington KY
Barry Baxter Stout - Lexington KY
Patrick Laurence Kroger - Versailles KY
David Michael Cseledy - Lexington KY

Assignee:

Lexmark International, Inc. - Lexington KY

International Classification:

G01D 534

US Classification:

25023113, 25023114, 33707, 341 13

Abstract:

An optical encoder assembly for an optical encoder for determining rotation of a rotatable shaft. An encoder housing is non-engageable with the shaft. A receiver plate is attached to the encoder housing, has a first side and a substantially opposing second side, and has a through hole and a window both extending from the first side to the second side, wherein the through hole is engageable with the shaft. An encoder mask is attached to the first side of the receiver plate, has a shaft hole engageable with the shaft, and has a mask grating positioned over the window. A light emitter is aligned to face the first side of the receiver plate and is positioned over the mask grating. A light detector is attached to the second side of the receiver plate and is positioned over the window.

US Patent:

6609781, Aug 26, 2003

Filed:

Dec 13, 2000

Appl. No.:

09/736075

Inventors:

Christopher Alan Adkins - Lexington KY
Lucas David Barkley - Lexington KY

Assignee:

Lexmark International, Inc. - Lexington KY

International Classification:

B41J 2300

US Classification:

347 37

Abstract:

A printhead firing control system for an inkjet printer includes a printhead mounted for movement across a paper path and an encoder for producing a digital output signal indicative of movement of the printhead. A filter circuit is connected to receive the digital output signal for filtering the digital output signal to remove frequency variations which meet at least one predetermined parameter, thereby providing a filtered digital signal. A fire-pulse generation circuit receives the filtered digital signal from the filter circuit and produces printhead heater resistor drive pulses based at least in part upon the filtered digital signal. This arrangement provides for improved printing accuracy by eliminating frequency changes in the digital encoder signal which may erroneously be caused by mechanical vibrations or other noise within the printer. An improved digitally controlled oscillator construction is also described.

Address:

3120 Dl Holw Dr, Lexington, KY 40515

VIN:

3N1BC11E67L446444

Make:

NISSAN

Model:

VERSA

Year:

2007