Neil K Doherty

US Patent:

6397495, Jun 4, 2002

Filed:

Dec 30, 1999

Appl. No.:

09/476072

Inventors:

Neil Doherty - Portsmouth NH
Lawrence E. Zagar - Rochester NH

Assignee:

Heidelberger Druckmaschinen AG - Heidelberg

International Classification:

F26B 1300

US Classification:

34641, 34639, 34640, 34654, 34655, 34656, 24261511

Abstract:

An air bar for steering a web of material has a hollow interior subjected to an air bar supply pressure. At least one air jet exit is connected to the hollow interior of the air bar. A metering device is assigned to the hollow interior of the air bar for varying the air pressured formed below the web of material for moving the web of material in a lateral direction.

US Patent:

6477954, Nov 12, 2002

Filed:

Jun 28, 2000

Appl. No.:

09/606033

Inventors:

Neil Doherty - Durham NH

Assignee:

Heidelberger Druckmaschinen AG - Heidelberg

International Classification:

B41F 3104

US Classification:

101365, 101484

Abstract:

An inker of an offset printing press is preset in accordance with the image coverage distribution for an image to be printed. The image coverage distribution is obtained from a plate scanner or from a digital image setter file that is available during makeready. Whether in simulation or in actual print, the printed ink film commands are first set. Then inking operation is simulated and a simulated ink coverage distribution is obtained by driving a steady state error between the printed ink film commands and the ink coverage to zero. The presets are calculated in a proportional-integral controller with feedback from a simulated printing plant. The resulting ink key presets are then used to preset the ink keys of the inker at the start of the actual print job.

US Patent:

6499639, Dec 31, 2002

Filed:

Feb 12, 2001

Appl. No.:

09/782455

Inventors:

Kevin Lauren Cote - Durham NH
Neil Doherty - Durham NH
Lothar John Schroeder - Portsmouth NH
Lawrence Edward Zagar - Rochester NH

Assignee:

Heidelberger Druckmaschinen AG - Heidelberg

International Classification:

B65H 2318

US Classification:

226 42, 226 44, 226111, 226 91

Abstract:

A method for dynamically controlling a driver of a nip roller in a web printing press includes controlling the speed of the driver in a tension-control mode during a phase of printing press operation and in a velocity-control mode during another phase of printing press operation. The controlling of the speed of the driver in the tension-control mode is based on the tension in the web upstream of the nip roller so as to maintain the tension at a desired tension value. The controlling of the speed of the driver in the velocity-control mode is based on a predetermined driver velocity ratio for maintaining the web tension. The tension-control mode may be employed during press start-up as the web accelerates to operating speed. The velocity-control mode may be used during printing operations of the press.

US Patent:

6606948, Aug 19, 2003

Filed:

Mar 11, 2002

Appl. No.:

10/094787

Inventors:

Stephen Arthur Austin - Strafford NH
David Robert Dawley - Rochester NH
Neil Doherty - Durham NH
Kent Dirksen Kasper - Portsmouth NH

Assignee:

Heidelberger Druckmaschinen AG - Heidelberg

International Classification:

B41F 2304

US Classification:

101487, 101216, 101483, 101219

Abstract:

A method for controlling a chill roll system in a web printing press includes calculating, based on a web inlet temperature of a web entering a first chill roll of the chill roll system, a dew point temperature of an ink solvent vapor of ink printed on the web is calculated. The inlet coolant temperature of coolant entering the first chill roll is set to temperature value near the calculated dew point temperature. Using a heat transfer model, the flow rate of the coolant through the first chill roll needed to maintain a temperature rise of the coolant through the first chill roll below a predetermined value is determined. The method prevents post-chill marking by sufficiently cooling the web, and sets chill roll temperature profiles to avoid solvent condensation on chill roll surfaces and thereby avoid condensate marking.

US Patent:

6684776, Feb 3, 2004

Filed:

Feb 23, 2001

Appl. No.:

09/795076

Inventors:

Kevin Lauren Cote - Durham NH
Neil Doherty - Durham NH
Michael Roger Perreault - Rochester NH
Lothar John Schroeder - Portsmouth NH

Assignee:

Heidelberger Druckmaschinen AG - Heidelberg

International Classification:

B41F 1354

US Classification:

101228, 101219

Abstract:

A method for determining the presence of slipping of a driven nip roller relative to the web in a web printing press includes systematically changing the speed of the nip driver while monitoring the corresponding change in web tension difference across the nip. The linearity and a slope of the relationship between the tension difference and the speed of the nip driver are determined. When the tension difference is non-linear relative to the speed of the driver or the slope of the relationship is substantially less than an expected slope, then slipping is determined to be present. An operator slip indication may be provided which includes the direction of the slip, positive or negative. The operator may then take corrective action to re-establish a non-slip condition, or automatic corrective actions may ensue.

US Patent:

7530659, May 12, 2009

Filed:

Mar 31, 2006

Appl. No.:

11/395446

Inventors:

Neil Doherty - San Diego CA, US
Robert J. Fogarty - San Diego CA, US
Myron A. Bezenek - San Diego CA, US

Assignee:

Hewlett-Packard Development Company, L.P. - Houston TX

International Classification:

B41J 29/393

US Classification:

347 19

Abstract:

Embodiments including imager units are disclosed.

US Patent:

8220889, Jul 17, 2012

Filed:

Oct 15, 2008

Appl. No.:

12/251968

Inventors:

Paul C. Ray - San Diego CA, US
Neil Doherty - San Diego CA, US
Mun Yew Lee - San Diego CA, US
Thomas J. Tarnacki - San Diego CA, US
Jaren D. Marler - Escondido CA, US
Robert J. Manders - De Pere WI, US
John W. Godden - San Diego CA, US

Assignee:

Hewlett-Packard Development Company, L.P. - Houston TX

International Classification:

B41J 3/00
B41J 2/435

US Classification:

347 4, 347262, 347264

Abstract:

A web flow path extends in a first direction opposite a print head and in a second opposite direction from the print head to a dryer.

US Patent:

8353592, Jan 15, 2013

Filed:

Jul 29, 2010

Appl. No.:

12/845758

Inventors:

Robert Rosati - San Diego CA, US
David Petch - San Diego CA, US
David Burney - San Diego CA, US
Jim Sykora - San Diego CA, US
Kenneth A. Regas - San Diego CA, US
Andy Bound - San Diego CA, US
Neil Doherty - San Diego CA, US
Scott Dennis - San Diego CA, US
Ben Jones - San Diego CA, US
Oksana Buyda - San Diego CA, US
Locson Tonthat - San Diego CA, US
Andrew Buyda - San Diego CA, US
Patrick Kirk - San Diego CA, US
Loren Hunt - San Diego CA, US
Jason Dewey - San Diego CA, US
Jim Trinchera - San Diego CA, US
Bill Cressman - San Diego CA, US
Ron Zech - San Diego CA, US

Assignee:

Zamtec Ltd - Dublin

International Classification:

B41J 2/01
B41J 29/38
B41J 2/015
B41J 2/165

US Classification:

347104, 347 9, 347 21, 347 34

Abstract:

A wide format printer that has a vacuum platen assembly, a printhead assembly spaced from the vacuum platen assembly, a media path extending between the vacuum platen assembly and the printhead assembly and a media encoder embedded within the vacuum platen assembly wherein, the media path is greater than 432 mm (17 inches) wide.