John William Christianson

US Patent:

53663055, Nov 22, 1994

Filed:

Jun 9, 1993

Appl. No.:

8/075061

Inventors:

John A. Christianson - Vancouver WA

Assignee:

Hewlett-Packard Company - Palo Alto CA

International Classification:

B41J 1122

US Classification:

400354

Abstract:

A glide bearing subsystem is described. The invented bearing subsystem includes an expanse having a non-circularly cross-sectional through hole providing in a first, e. g. an upper, region thereof two arcuately spaced planar contact surfaces providing dual parallel lines of contact with a cylindrical rail upon which the carriage is mounted for reciprocal axial movement. A second, e. g. a lower, region of the hole generally opposite and preferably smoothly joining the first hole region is semicylindrical and of slightly greater diameter than that of the rail, thereby controlling inadvertent lift-off of the carriage during acceleration phases of its reciprocal movement along the rail. Preferably, the carriage has a pair of axially spaced bearings formed in generally planar thin expanses of oil-impregnated bronze, which expanses are made by a sintering process and are insert molded integrally with the printer's carriage.

US Patent:

D3733785, Sep 3, 1996

Filed:

Mar 2, 1995

Appl. No.:

D/035557

Inventors:

Stephen C. Brown - Vancouver WA
Donald R. Bloyer - Brush Prairie WA
Stephen D. Dorow - Vancouver WA
Sandra Y. Okazaki - Redmond WA
Larry A. Jackson - Vancouver WA
Richard E. Berriman - Vancouver WA
Donald R. McClelland - Brush Prairie WA
David M. Thorpe - Portland OR
Jan Hippen - Portland OR
John A. Christianson - Vancouver WA
Richard A. Kelley - Vancouver WA
Daniel R. Dwyer - Washougal WA
Steve O. Rasmussen - Vancouver WA
Larry G. Neubauer - Vancouver WA
Henry Y. Chin - Portland OR

Assignee:

Hewlett-Packard Company - Palo Alto CA

US Classification:

D18 55

US Patent:

51715317, Dec 15, 1992

Filed:

Apr 3, 1991

Appl. No.:

7/681444

Inventors:

John A. Christianson - Vancouver WA
Mark R. Bateman - Mountain View CA

Assignee:

Hewlett-Packard Company - Palo Alto CA

International Classification:

G01N 3100
B01L 906
B01L 700

US Classification:

422 64

Abstract:

An apparatus and method for selecting a vial from a plurality of vials and for transporting the selected vial to a sampling device such as a capillary zone electrophoresis apparatus. The apparatus comprises a removable turret assembly for holding a plurality of vials, a drive for rotating the turret assembly and for aligning a selected vial with the sampling device, and a transport device for transporting the selected vial to the sampling device. The appratus may further comprise a device to supply a cooled gas to the turret assembly, and a control device for controlling the drive and the transport device.