John L Knaack

US Patent:

7866810, Jan 11, 2011

Filed:

Feb 9, 2007

Appl. No.:

11/704509

Inventors:

Kevin Campion - Minnetonka MN, US
Aaron Barclay - Prior Lake MN, US
Chad Beery - Mound MN, US
Christian Vasbo - White Bear Lake MN, US
Corrine Ruether - Bloomington MN, US
Joe Kubes - Rosemount MN, US
Rick Bigaouette - Chaska MN, US
Randy Johnston - Lakeville MN, US
Pete Ladas - Eden Prairie MN, US
Pete Schmidt - Chanhassen MN, US
John Knaack - Burnsville MN, US

Assignee:

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

International Classification:

B41J 2/01

US Classification:

347104, 347106

Abstract:

An improved large-format inkjet printer that is capable of providing more efficient and higher quality printing on a variety of print media, including for example, paper, fabric, corrugated media, and plywood. The improved printer provides improvements to the platen assembly, rail assembly, service station assembly, printhead assembly and vacuum assembly to provide improved printing capability. In addition the printer provides a table assembly that can be integrated into the platen assembly to provide a secure and flush surface for supporting various types of print media.

US Patent:

20030007023, Jan 9, 2003

Filed:

Mar 20, 2002

Appl. No.:

10/102048

Inventors:

Aaron Barclay - Prior Lake MN, US
Dale Nordenstrom - New Brighton MN, US
Daniel Jankovich - Minneapolis MN, US
Dennis Shell - Webster MN, US
Ivor Matz - St. Anthony MN, US
John Knaack - Burnsville MN, US
Kerry Anderson - Lakeville MN, US
Kevin Campion - Minnetonka MN, US
Larry Gonier - Inver Grove Heights MN, US
Mark Olsen - Savage MN, US
Peter Malecha - Prior Lake MN, US
Peter Ladas - Plymouth MN, US
Richard Bigaoutte - Chaska MN, US
Robert Schmidt - Prior Lake MN, US
Steven Lidke - Chaska MN, US
Wade Kragtorp - Madison WI, US

International Classification:

B41J003/407

US Classification:

347/008000, 347/019000, 347/106000, 347/037000

Abstract:

An improved, large-format digital inkjet print engine that includes a group of co-operating print engine subassemblies that embody various novel elements that both discreetly and cumulatively advance the current art. The group of subassemblies and sensors cooperate to produce high quality graphic images using a plurality of different colors of ink and different types of print media at speeds several times faster than similar conventional inkjet printers. In addition, the use of cooperating elements permit the manufacture of complex, large-format digital color inkjet print engines that are less expensive to fabricated, operated, and serviced. The present invention finds use in large-format digital color printing and imaging, where successful repeatable printing requires precise placement of droplets of ink, toner or other marking material on a print medium such as paper, vinyl, film, or similar substrate.

US Patent:

20200238746, Jul 30, 2020

Filed:

Apr 16, 2020

Appl. No.:

16/850258

Inventors:

- Shakopee MN, US
Heather MAERSHBECKER - Shakopee MN, US
Rajesh K. JURIASINGANI - Shakopee MN, US
John KNAACK - Shakopee MN, US
Wade KRAGTORP - Shakopee MN, US

International Classification:

B42D 25/405
B42D 25/45

Abstract:

Methods and systems are disclosed for printing vibrant grey color(s) on plastic cards. The following features, which can be used individually or in any combination thereof, can be implemented to achieve the vibrant grey color(s): 1) use of CMYK pigment inks to achieve CMYK printing; 2) a pixel extraction process and/or a print trapping process; 3) two separate print commands including a CMY (or CMYK)+blending print command and a K+blending print command; and 4) proper card set-up.

US Patent:

20190366754, Dec 5, 2019

Filed:

May 31, 2019

Appl. No.:

16/428310

Inventors:

- Shakopee MN, US
Heather MAERSHBECKER - Shakopee MN, US
Rajesh K. JURIASINGANI - Shakopee MN, US
John KNAACK - Shakopee MN, US
Wade KRAGTORP - Shakopee MN, US

International Classification:

B42D 25/405
B42D 25/45

Abstract:

Methods and systems are disclosed for printing vibrant grey color(s) on plastic cards. The following features, which can be used individually or in any combination thereof, can be implemented to achieve the vibrant grey color(s): 1) use of CMYK pigment inks to achieve CMYK printing; 2) a pixel extraction process and/or a print trapping process; 3) two separate print commands including a CMY (or CMYK)+blending print command and a K+blending print command; and 4) proper card set-up.