Donald C Rasmussen

US Patent:

8474930, Jul 2, 2013

Filed:

Aug 26, 2011

Appl. No.:

13/199347

Inventors:

Donald O. Rasmussen - Costa Mesa CA, US

International Classification:

B41J 29/38

US Classification:

347 6, 347 89

Abstract:

An ink delivery system is provided for an inkjet printer. The ink delivery system includes a supply of ink and an inkjet printhead having a first port, second port and an ink ejection nozzle. The inkjet printhead is connected to the ink supply tank by a first fluid supply path. The first fluid supply path includes first and second check valves which permit ink to flow from the ink supply tank to the inkjet printhead, but prevent fluid flow in the opposite direction. The ink delivery system includes a second fluid supply path which is connected at one end to the first fluid supply path between the respective first and second check valves. The second fluid supply path is connected at its opposite end to the inkjet printhead's second port. The second fluid supply path further includes a bidirectional pump so as to direct fluid flow in either direction through the second fluid supply path. The delivery system operates in various modes including a re-circulate mode, pressure purge mode, maintenance mode and normal print mode.

US Patent:

45209707, Jun 4, 1985

Filed:

Oct 3, 1983

Appl. No.:

6/538426

Inventors:

Donald O. Rasmussen - Arcadia CA
William C. Chow - West Covina CA
Franklin J. Davio - Burbank CA

Assignee:

Kennedy Company - Monrovia CA

International Classification:

G03B 104
G11B 1532

US Classification:

242195

Abstract:

In a magnetic tape drive in which the supply reel is contained within a cartridge, the tape is automatically threaded from the supply reel within the cartridge past a magnetic head assembly to the take-up reel by a vacuum source coupled via apertures in the hub of the take-up reel to a generally enclosed continuous flowpath extending between the supply and take-up reels. The vacuum source causes air to flow into the cartridge through air inlet ports and around the opposite sides of the supply reel to an opposite tape exit port communicating with the flowpath so as to pull the leading end of a length of magnetic tape wound on the supply reel through the flowpath and onto the take-up reel. The supply reel is initially rotated in a second direction to ensure that the length of magnetic tape is completely wound thereon, following which the supply reel is rotated in an opposite first direction to enable the leading end of the length of tape to be picked off the supply reel and fed into the flowpath to the take-up reel. The take-up reel is rotated in a second direction opposite the first direction.

US Patent:

54693101, Nov 21, 1995

Filed:

Sep 29, 1992

Appl. No.:

7/953411

Inventors:

Richard T. Slocum - Aliso Viejo CA
James Bjordahl - Arcadia CA
Danny Louie - Monterey Park CA
Donald Rasmussen - Arcadia CA

Assignee:

WangDAT, Inc. - Irvine CA

International Classification:

G11B 1568

US Classification:

360 92

Abstract:

An automated cassette loader system includes a front loading tape drive mounted in a standard height enclosure with a removable magazine including cassettes stored in front to rear alignment in two levels. The cassettes are pushed between entry and exit positions by pushing one cassette out of a push position in one level and then pushing a cassette from a push position in the other level. The cassette pushed out of the magazine is transported to the front loading tape drive and, when removed therefrom, transported to the intake of the other level of the magazine.

US Patent:

54305888, Jul 4, 1995

Filed:

Oct 27, 1994

Appl. No.:

8/330224

Inventors:

Donald Rasmussen - Arcadia CA

Assignee:

WangDAT, Inc. - Irvine CA

International Classification:

G11B 3300
G11B 15675

US Classification:

360 965

Abstract:

A mechanical interlocking is provided between a bidirectional swinging access door with a moveable part of a tape cassette or magazine loading mechanism such that the door remains unlatched as the moveable part moves from its forward loading/unloading position to its rearward operational position and the door remains latched as the moveable part moves in the forward direction from its operational position to its loading/unloading position.