Kenneth R Ossman

US Patent:

7193638, Mar 20, 2007

Filed:

Nov 30, 2004

Appl. No.:

10/998986

Inventors:

Howard A. Mizes - Pittsford NY, US
Peter Paul - Webster NY, US
Stanely J. Wallace - Victor NY, US
Michael D. Borton - Ontario NY, US
Kenneth R. Ossman - Macedon NY, US

Assignee:

Xerox Corporation - Stamford CT

International Classification:

G06K 9/00
G03G 21/00

US Classification:

347116, 399301

Abstract:

System and methods are provided for detecting color separation misalignment in raster optical scanners. A dash minimum response curve is obtained from a plurality of minimal responses sensed from a plurality of dashes in a test pattern. The frequency of the dash minimum response curve a is used to detect skew or bow, depending on whether the frequency is a constant or a variable.

US Patent:

7309118, Dec 18, 2007

Filed:

Nov 30, 2004

Appl. No.:

10/998544

Inventors:

Howard A. Mizes - Pittsford NY, US
Peter Paul - Webster NY, US
Stanley J. Wallace - Victor NY, US
Michael D. Borton - Ontario NY, US
Kenneth R. Ossman - Macedon NY, US

Assignee:

Xerox Corporation - Norwalk CT

International Classification:

B41J 29/393

US Classification:

347 19

Abstract:

Systems and methods are provided for determining registration errors in the cross process direction of a printer. A first straight line is obtained by detecting line centers of a first plurality of dashes in a test pattern. A second straight line is obtained by detecting a line center positions of a second plurality of dashes in the test pattern. A difference between the off-set of the first straight line and the off-set of the second straight line is used in determining registration errors.

US Patent:

7427118, Sep 23, 2008

Filed:

Nov 30, 2004

Appl. No.:

10/999014

Inventors:

Howard A. Mizes - Pittsford NY, US
Kenneth R. Ossman - Macedon NY, US
Stanley J. Wallace - Victor NY, US
Michael D. Borton - Ontario NY, US

Assignee:

Xerox Corporation - Norwalk CT

International Classification:

B41J 29/38

US Classification:

347 19, 347 5, 347 14

Abstract:

Systems and methods are provided for detecting intermittent, weak or missing jets of a printer. The detection is implemented using a test pattern. Detected failed jets may be confirmed using a verification target. A printhead containing nozzles corresponding to detected failed jets may be wiped or purged.

US Patent:

7543911, Jun 9, 2009

Filed:

Oct 30, 2007

Appl. No.:

11/976992

Inventors:

Howard A. Mizes - Pittsford NY, US
Peter Paul - Webster NY, US
Stanley J. Wallace - Victor NY, US
Michael D. Borton - Ontario NY, US
Kenneth R. Ossman - Macedon NY, US

Assignee:

Xerox Corporation - Norwalk CT

International Classification:

B41J 2/15
B41J 29/393

US Classification:

347 41, 347 19

Abstract:

Systems and methods are provided for determining registration errors in the cross process direction of a printer. A first straight line is obtained by detecting line centers of a first plurality of dashes in a test pattern. A second straight line is obtained by detecting a line center positions of a second plurality of dashes in the test pattern. A difference between the off-set of the first straight line and the off-set of the second straight line is used in determining registration errors.

US Patent:

7545519, Jun 9, 2009

Filed:

Jul 20, 2006

Appl. No.:

11/490692

Inventors:

Kenneth R. Ossman - Macedon NY, US
Stanley J. Wallace - Victor NY, US
Michael D. Borton - Ontario NY, US

Assignee:

Xerox Corporation - Norwalk CT

International Classification:

G01B 11/14

US Classification:

356625

Abstract:

A lead edge sheet curl sensor apparatus and method are disclosed. In general, a first and a second light emitter are aligned wherein the light beams from the first light emitter and second light emitter cross. The first and second light emitter beams cross at the transport media sheet substrate path wherein the transport media sheet substrate path is the path of a media sheet substrate with zero curl. First and second light detectors are aligned to receive the light beams from the first and second light emitters. A media sheet substrate with either positive or negative curl on the lead edge of the sheet substrate interrupts light beams from first and second light emitters, as detected at first and second light detectors. The time delay between the light beam interruptions is proportional to the sheet substrate curl, and the order of interruptions indicates whether the sheet substrate curl is positive or negative.

US Patent:

7548316, Jun 16, 2009

Filed:

Apr 18, 2007

Appl. No.:

11/737083

Inventors:

Ruddy Castillo - Bronx NY, US
Barry Paul Mandel - Fairport NY, US
Kenneth R. Ossman - Macedon NY, US
Stanley J. Wallace - Victor NY, US
Michael D. Borton - Ontario NY, US

Assignee:

Xerox Corporation - Norwalk CT

International Classification:

G01N 21/25

US Classification:

356406, 250223 R, 250221, 2505594

Abstract:

A lead edge and/or trail edge sheet curl sensing and constraint method and system. First and second light emitters and detector pairs are aligned such that the light beams from the first light emitter and second light emitter cross at the transport media sheet substrate path, which constitutes the path of a media sheet substrate with zero curl. A media sheet substrate with either positive or negative curl on the lead edge of the sheet substrate interrupts light beams from the first and second light emitters, as detected by first and second light detectors. A similar approach can be used to detect the trail edge curl. The time delay between the light beam interruptions is proportional to the sheet substrate curl, and the order of interruptions indicates whether the sheet substrate curl is positive or negative. A first pair and a second pair of substrate constraint rollers can also be provided in the paper path upstream and downstream of the sensing system. The roller pairs closest to the sensor are made of relatively non-deformable materials or of materials of similar elasticity so that different media are constrained in the sensor zone with the same sheet trajectory relative to the nip.

US Patent:

7552986, Jun 30, 2009

Filed:

Nov 30, 2004

Appl. No.:

10/998632

Inventors:

Howard A Mizes - Pittsford NY, US
Peter Paul - Webster NY, US
Stanley J Wallace - Victor NY, US
Michael D Borton - Ontario NY, US
Kenneth R Ossman - Macedon NY, US

Assignee:

Xerox Corporation - Norwalk CT

International Classification:

B41J 29/393

US Classification:

347 19, 347116, 347238

Abstract:

Systems and methods are provided for detecting process direction registration errors in a printer. The errors are detected by analyzing a metric of a dash minimum response obtained from a test pattern. The test pattern contains dashes. At least one dash is shifted in the process direction in relation to another dash.

US Patent:

7690746, Apr 6, 2010

Filed:

Mar 21, 2008

Appl. No.:

12/053206

Inventors:

David A. Mantell - Rochester NY, US
Jason O'Neil - Rochester NY, US
Kenneth R. Ossman - Macedon NY, US

Assignee:

Xerox Corporation - Norwalk CT

International Classification:

B41J 29/38

US Classification:

347 14, 347 19

Abstract:

A method for detecting a defect in an inkjet print head for printing a substantially clear ink includes including an ultraviolet or infrared sensitive material in the substantially clear ink, marking a test image on a substrate by jetting the substantially clear ink through one or more jets of the inkjet print head to be evaluated, exposing the test image to activating radiation having a wavelength to which the included ultraviolet or infrared sensitive material responds. During or following the exposing, the test image is evaluated with an image sensor, and whether the inkjet print head or any one of the one or more jets thereof being evaluated is defective is then determined based on the evaluation. A system for the method is also set forth.