David V Allaway

US Patent:

D661729, Jun 12, 2012

Filed:

Sep 28, 2010

Appl. No.:

29/375809

Inventors:

John B. Gilbert - Portland OR, US
David Allaway - Portland OR, US
Carl W. Fabian - Beaverton OR, US

Assignee:

Xerox Corporation - Norwalk CT

International Classification:

1402

US Classification:

D18 55

US Patent:

8226185, Jul 24, 2012

Filed:

Sep 11, 2008

Appl. No.:

12/208442

Inventors:

Michael Eugene Jones - West Linn OR, US
David Scott Allaway - Portland OR, US
David L. Knierim - Wilsonville OR, US

Assignee:

Xerox Corporation - Norwalk CT

International Classification:

B41F 13/00
B41F 33/00

US Classification:

347 5

Abstract:

An imaging system for a printer utilizing a friction belt drum drive is comprised of a drum position sensor, drum pulley, drive belt, motor pulley, drive motor, drive motor position sensor, and controller. The velocities of the drum and motor drive pulleys are measured using the controller and position sensors. These velocities along with the drive ratio are used to determine and monitor slip between the belt and pulleys. The magnitude of the slip measured can be used to trigger the controller to respond to the slip event. These responses may include, for example, disabling the motor or reducing motor current or providing a warning indicative of an excessive slip event. Slip measurement combined with other measurements such as motor current can be used to determine the torque capacity of the friction drive. Further, long-term changes in the ratio of pulley velocities can be used to determine drive belt wear.

US Patent:

8360554, Jan 29, 2013

Filed:

Jul 19, 2007

Appl. No.:

11/880023

Inventors:

David Scott Allaway - Portland OR, US

Assignee:

Xerox Corporation - Norwalk CT

International Classification:

B41J 23/00

US Classification:

347 38

Abstract:

A modular encoder has been developed that can be mounted to a motor shaft without requiring time consuming alignment or special tools. The encoder includes a base having an annular opening, the base including a plurality of resilient arms surrounding the annular opening with each arm having a terminal end that extends into the annular opening, and a hub having a horizontal flange with a top and a bottom surface and a generally vertical wall extending from the bottom surface of the horizontal flange, the wall is configured to fit within the annular opening of the base and is circumscribed with a groove for receiving the terminal ends of the resilient arms to secure the hub to the base and enable rotation of the hub within the annular opening of the base as the terminal ends of the resilient arms slide within the groove.