Raymond J Barry

US Patent:

6396052, May 28, 2002

Filed:

Apr 7, 2000

Appl. No.:

09/543672

Inventors:

Raymond Jay Barry - Lexington KY
Todd Alan Dutton - Lexington KY
Steven Andrew Rice - Shelbyville KY

Assignee:

Lexmark International, Inc. - Lexington KY

International Classification:

G01D 534

US Classification:

25023113, 25023116, 25023118

Abstract:

A method of determining a feed position of a print medium in an imaging apparatus includes an encoder device, connected to a feed shaft, that produces a first periodic signal and a second periodic signal approximately 90 degrees out of phase with the first. A modified first signal is created. A modified second signal is created. The modified first signal is added to the modified second signal to create a summation signal that has a plurality of local minimum values, a plurality of local maximum values, and a plurality of substantially linear segments. A periodic modified summation signal is created by adding a corresponding constant value to each linear segment. The feed position of the print medium is calculated based upon a number of cycles of the modified summation signal counted and a determined value of the modified summation signals.

US Patent:

7018121, Mar 28, 2006

Filed:

Mar 11, 2004

Appl. No.:

10/798127

Inventors:

Raymond Jay Barry - Lexington KY, US
John Parker Richey - Lexington KY, US
Michael David Maul - Lexington KY, US
Steven R. Rehmel - Lexington KY, US

Assignee:

Lexmark International, Inc. - Lexington KY

International Classification:

B41F 35/00
B41J 29/18

US Classification:

400708, 400703, 356445, 356446, 356600, 399 45, 250239

Abstract:

A media sensor for an image forming apparatus is operative to sense and distinguish opaque, transparent or no media in a media path. In one embodiment, an optical source and detector are positioned on opposite sides of the media path, at an acute, non-zero angle with respect to a direction normal to the media path. In other embodiments, an optical source and detector are co-located on the same side of the media path with an optical barrier between them, and one or more reflective surfaces positioned on the opposite side. With no media in the media path, the detector receives a readily detectable amount of optical energy emitted by the source. For opaque media, the detector receives very little, if any, optical energy emitted by the source. For transparent media, the detector receives a level of optical energy between that in the cases of opaque media and no media.

US Patent:

7111916, Sep 26, 2006

Filed:

Feb 27, 2002

Appl. No.:

10/084256

Inventors:

Raymond Jay Barry - Lexington KY, US
Michael Wesley Baskette - Lexington KY, US
Gary Scott Overall - Lexington KY, US
Steven Andrew Rice - Shelbyville KY, US
Johnny Ray Sears - Midway KY, US
Curtis Ray Droege - Richmond KY, US
Randall Steven Gall - Lexington KY, US
Andrew Charles Hogan - Lexington KY, US

Assignee:

Lexmark International, Inc. - Lexington KY

International Classification:

B41J 2/195

US Classification:

347 7, 347 86, 347 99

Abstract:

An apparatus for the management of the fluid level in a media coating system. In one embodiment, the apparatus has a supply item for the storage of a media coating fluid and an applicator having a trough for receiving the media coating fluid from the supply item. The apparatus utilizes a fluid level detection sensor that is located within the applicator to measure whether the media coating fluid level within the trough of the applicator is either above or below a threshold position and to generates an output signal. The apparatus has a controller for receiving the output signal and controlling delivery of the media coating fluid from the supply item to the applicator.

US Patent:

7122800, Oct 17, 2006

Filed:

Mar 26, 2004

Appl. No.:

10/810732

Inventors:

Raymond Jay Barry - Lexington KY, US
Gary Scott Overall - Lexington KY, US

Assignee:

Lexmark International, Inc. - Lexington KY

International Classification:

G01J 5/02
G03G 15/00

US Classification:

2503411, 399 15, 399 64

Abstract:

An optical density sensor disposed over a target surface in an image formation apparatus comprises an integrating cavity having a diffuse, reflective interior surface and a view port formed therein. An optical source directs light through the view port onto the target surface, without striking any interior surface of the cavity. Light reflected from the target surface is detected by an optical detector disposed within the cavity. The optical source may be disposed in a collimator, which may extend into the interior of the cavity, and may include a lens. A circuit card which may include an optical detector sensing circuit may be disposed proximate the optical detector. A compensating slot formed in the cavity may allow some reflected light to directly impact the optical detector as the gap between the cavity and the target surface increases.

US Patent:

7374163, May 20, 2008

Filed:

Oct 21, 2004

Appl. No.:

10/970774

Inventors:

Willliam P. Cook - Lexington KY, US
Daniel L. Carter - Georgetown KY, US
Niki J. Murrell - Lexington KY, US
Raymond J. Barry - Lexington KY, US

Assignee:

Lexmark International, Inc. - Lexington KY

International Classification:

B65H 1/00

US Classification:

271145

Abstract:

A media stack height sensor in an image forming apparatus with a flag arm that is in contact with a top surface a media stack. The arm is coupled to a flag characterized by varying transmissivity. The flag is moveable by the flag arm so that as the position of the arm changes in relation to the stack height, a different portion of the flag is positioned between a transmitter and receiver of an optical sensor disposed within the body of the image forming apparatus. The flag accordingly reduces the amount of optical energy received by the receiver. The receiver output signal indicates the height of the media stack. The flag also includes features that further limit light transmission to the receiver to provide discrete stack height indications such as low, empty, full, or intermediate states.

US Patent:

7555231, Jun 30, 2009

Filed:

Sep 14, 2006

Appl. No.:

11/531803

Inventors:

Paul Etter - Lexington KY, US
Kerry Leland Embry - Midway KY, US
Raymond Jay Barry - Lexington KY, US

Assignee:

Lexmark International, Inc. - Lexington KY

International Classification:

G03G 21/12

US Classification:

399 35, 324662, 399 27, 399360

Abstract:

A capacitive sensor to detect toner volume levels in a toner container within an image forming device includes opposed electrodes disposed within the interior of the toner container. The opposed electrodes form a capacitor characterized by an inherent capacitance that varies in response to an amount of toner that exists between the opposed electrodes. A corresponding sensor circuit is electrically coupled to the opposed electrodes and adapted to sense an instantaneous capacitance of the capacitor to determine the amount of toner that exists between the opposed electrodes. The opposed electrodes may have different shapes and configurations, including for example, plates disposed within the toner container or the interior walls of the container itself. The sensor circuit is configured to apply an alternating current signal to the opposed electrodes and sense an output voltage that is indicative of an instantaneous capacitance of the capacitor corresponding to toner volume within the container.

US Patent:

8412058, Apr 2, 2013

Filed:

Sep 17, 2010

Appl. No.:

12/885129

Inventors:

Raymond Jay Barry - Lexington KY, US

Assignee:

Lexmark International, Inc. - Lexington KY

International Classification:

G03G 15/08

US Classification:

399 27

Abstract:

A method for detecting low toner in an electro-photographic toner cartridge having an optical sensor using a light beam to detect the presence or absence of toner in the cartridge includes transmitting to a processor a signal related to the strength of the light beam sensed as a paddle disposed within the cartridge rotates. The processor calculates an average value for the signal for each of a plurality of sets of paddle revolutions. The processor then calculates a variation value for the signal for each of the plurality of sets of paddle revolutions. The processor filters each variation value to determine a plurality of short term variation values. The processor monitors whether at least one short term variation value exceeds a first threshold. When the at least one short term variation value exceeds the first threshold, the processor signals that the toner level is low.

US Patent:

20080050143, Feb 28, 2008

Filed:

Aug 23, 2006

Appl. No.:

11/466470

Inventors:

Raymond Jay Barry - Lexington KY, US

International Classification:

G03G 15/00
G03G 15/02

US Classification:

399 89

Abstract:

A photoconductor charging system for use with an image forming device. The image forming device may include a plurality of image forming units transferring toner particles to a media substrate and each of the plurality of image forming units including a photoconductive unit and a corresponding charging unit positioned to charge the photoconductive unit. Generally, an alternating current power supply may be coupled to one or more of the charging units and supply a voltage thereto. The alternating current power supply may include a switching mode amplifier. In one embodiment, the switching mode amplifier is a class D amplifier. The charging system may further include a filter to filter an output of the switching mode amplifier. The filter may include a low pass L-C filter. The switching mode amplifier may operate a transistor output bridge between on and off states to improve amplifier efficiency.