Richard W Howe

US Patent:

6761351, Jul 13, 2004

Filed:

Jan 30, 2003

Appl. No.:

10/248590

Inventors:

Richard L. Howe - Webster NY

Assignee:

Xerox Corporation - Stamford CT

International Classification:

B65H 522

US Classification:

271 315, 271 402, 271 409, 271266, 27126501

Abstract:

Systems and methods of registration system control are provided that compensate for differences in physical properties of various substrates being transported through the system that impact velocity of the substrate. Exemplary systems of the Invention include at least one roll pair formed by a first, driven roll and a second roll defining a nip therebetween that is part of the transport path through which a substrate is passed. A prestored lookup table includes empirically-derived compensation factors for plural different kinds of substrates, with each compensation factor being based on physical characteristics of the substrate that impact displacement and velocity of the substrate along the transport path, such as the substrates mass per unit area, which has been found to have a strong correlation with detected deviations in linear travel displacement and velocity. Upon input or determination of the substrate being registered, the system adjusts the drive profile of the drive roll by the compensation factor. This is preferably by substituting a derived effective drive roll radius value for the actual drive roll radius value in the drive control profile to correspond to the substrate being transported.

US Patent:

6920307, Jul 19, 2005

Filed:

Apr 25, 2003

Appl. No.:

10/249632

Inventors:

Richard L. Howe - Webster NY, US

Assignee:

Xerox Corporation - Stamford CT

International Classification:

G03G015/00

US Classification:

399395, 399394, 400579, 271227

Abstract:

Systems and methods of registering a sheet in an image reproduction, e. g. . ,. a xerographic, device use sheet parameters regardless of the tray or bin with which the sheets are associated, separate tallies of sheet registration correction factors for both sides of a sheet, and use registration errors detected on a first side of a sheet to generate correction factors concerning proper registration of the second side of that sheet. In embodiments, the systems and methods average registration errors for one particular side of a plurality of sheets to obtain a damped error signal that is taken into account for registration of subsequent sheets on each respective sheet side. In embodiments, the systems and methods determine variations between actual and target system performance to affect subsequent sheet flow and registration.

US Patent:

7036811, May 2, 2006

Filed:

Jan 30, 2003

Appl. No.:

10/248591

Inventors:

Richard L. Howe - Webster NY, US

Assignee:

Xerox Corporation - Stamford CT

International Classification:

B65H 5/22
B65H 83/00
B65H 85/00
B65H 5/00

US Classification:

271 313, 271 412, 271 41, 271220

Abstract:

Systems and methods of registration system control are provided that compensate for differences in physical properties of various substrates being transported through the system that impact the displacement of the substrate through a given path. Exemplary systems of the invention include at least one roll pair formed by a first, driven roll and a second roll defining a nip therebetween that is part of the transport path through which a substrate is passed. A prestored lookup table includes empirically- or theoretically-derived compensation factors for plural different kinds of substrates, with each compensation factor being based on physical characteristics of the substrate that impact actual travel length of the substrate along the transport path, such as the substrate's mass per unit area, which has been found to have a strong correlation with a substrate's bending stiffness, which has been found to have a strong correlation with detected deviations in linear travel path. Upon input or determination of the substrate being registered, the system adjusts the drive profile of the drive roll by the compensation factor. This is preferably by adding the derived paper path length adjusting value to the actual nominal length between the drive roll pair and a desired registration position to take into account an arcuate or non-linear travel path due to flexure of the substrate.

US Patent:

7158751, Jan 2, 2007

Filed:

Apr 8, 2005

Appl. No.:

11/101425

Inventors:

Richard L. Howe - Webster NY, US

Assignee:

Xerox Corporation - Stamford CT

International Classification:

G03G 15/00

US Classification:

399395, 399394, 400579, 271227

Abstract:

Systems and methods of registering a sheet in an image reproduction, e. g. , a xerographic, device use sheet parameters regardless of the tray or bin with which the sheets are associated, separate tallies of sheet registration correction factors for both sides of a sheet, and use registration errors detected on a first side of a sheet to generate correction factors concerning proper registration of the second side of that sheet. In embodiments, the systems and methods average registration errors for one particular side of a plurality of sheets to obtain a damped error signal that is taken into account for registration of subsequent sheets on each respective sheet side. In embodiments, the systems and methods determine variations between actual and target system performance to affect subsequent sheet flow and registration.

US Patent:

7277669, Oct 2, 2007

Filed:

Dec 30, 2005

Appl. No.:

11/320822

Inventors:

Richard L. Howe - Webster NY, US

Assignee:

Xerox Corporation - Stamford CT

International Classification:

G03G 15/00

US Classification:

399395, 399394, 400579, 271227

Abstract:

Systems and methods of registering a sheet in an image reproduction, e. g. , a xerographic, device use sheet parameters regardless of the tray or bin with which the sheets are associated, separate tallies of sheet registration correction factors for both sides of a sheet, and use registration errors detected on a first side of a sheet to generate correction factors concerning proper registration of the second side of that sheet. In embodiments, the systems and methods average registration errors for one particular side of a plurality of sheets to obtain a dampened error signal that is taken into account for registration of subsequent sheets on each respective sheet side. In embodiments, the systems and methods determine variations between actual and target system performance to affect subsequent sheet flow and registration.

US Patent:

7580664, Aug 25, 2009

Filed:

May 30, 2007

Appl. No.:

11/807817

Inventors:

Richard L. Howe - Webster NY, US

Assignee:

Xerox Corporation - Norwalk CT

International Classification:

G03G 15/20
G03G 15/14

US Classification:

399323, 399320, 399399

Abstract:

A fuser stripping subsystem for use with a fusing system is provided. In one embodiment, at least one movable stripper finger is disposed adjacent a fusing assembly in a first position. Assuming a selected condition is met, the at least one movable stripper finger is moved from the first position to a second position for substantially aligning the at least one movable stripper finger with a toned image section of a print media sheet passing through a nip defined by the rolls. In another embodiment, a print media sheet with a toned image section is shifted, prior to feeding the same through the nip, so that the toned image section may be substantially aligned with at least one stripper finger. In yet another embodiment, a combination of stripper finger movement and/or image shifting may be used to obtain substantial alignment between one or more stripper fingers and an image.

US Patent:

20090296156, Dec 3, 2009

Filed:

May 27, 2009

Appl. No.:

12/472689

Inventors:

Lalit Keshav Mestha - Fairport NY, US
Richard Leighton Howe - Webster NY, US
Raja Bala - Webster NY, US

Assignee:

Xerox Corporation - Norwalk CT

International Classification:

H04N 1/405

US Classification:

358 306

Abstract:

A device, system, and method for reducing the pitch-to-pitch variation of color using pitch-based linearization of halftone screens are presented. A selection of images is printed at different pitches, and each image is measured and tracked with its pitch. Pitch-based TRCs are constructed using patches, which may be scheduled during print run or during machine diagnostic process and halftone dots are constructed and uploaded in the image path for each pitch. The updated dots are then used to produce a linearized halftone image for transfer to a print surface which results in improved color balance.

US Patent:

56237200, Apr 22, 1997

Filed:

Sep 30, 1996

Appl. No.:

8/720523

Inventors:

Richard L. Howe - Webster NY
Leon G. Poplawski - Webster NY
Joseph Rozansky - Webster NY

Assignee:

Xerox Corporation - Stamford CT

International Classification:

G03G 1520

US Classification:

399323

Abstract:

Disclosed is a novel method and apparatus for rotating a stripper bar associated with a paper path. A cam and cable mechanism replaces a rigid link mechanism on the stripper bar, the cam and cable mechanism providing for a much greater angle of rotation of the stripper bar than the rigid link mechanism. The additional rotation allows the stripper fingers on the stripper bar to be rotated completely out of the way of a paper jam clearance path. Other new developments include a wrench positioning system that controls the orientation of the stripper bar and an over-rotation prevention system that stops the rotation of the stripper bar when the stripper bar and stripper fingers are being serviced.