Lexmark International, Inc.

International Business Machines Corporation

Krikor Yosmali

Paul Douglas Horrall

Edward Alan Rush

Larry Steven Foster

James P Wang

Steven A Silverstein

Alexander D Meade

Bernard L Wilzbach

Bryan Michael Blair

Robert Leonard Burdick

Iraj D Shakib

Reginald Keith Bethel

Troy A Lee

Marguerite H Doyle

Charles Jerome Cheek

Nadia Nouri

A multi-functional fuser backup roll release mechanism and operating process are defined. In the event of a paper jam, the primary gear train from a prime mover to driven rolls of the imaging apparatus is interrupted, and a secondary drive train is engaged. The drive train operates a drive shaft, rotating a worm gear to control a cam and lever apparatus connected to springs and bellcranks at opposite ends of the backup roll. Upon the detection of a paper jam, or prolonged inactivity of the fuser, the nip between the fuser hot roll and backup roll is opened. During normal operation, the mechanism can be used to control the nip force between the fuser roll and the backup roll, to provide the optimal nip load for the media being processed, and the print glossiness desired.

Multi-functional fuser backup roll release mechanism

A multi-level oiling device drive mechanism suitable for use in an imaging apparatus is disclosed. The drive mechanism includes a prime mover and gear train mounted to a frame of the base machine. A driven member of the oiling device, such as a web take-up spool in an oil web system, is driven by the gear train. When replacement of the oiling device is required, the driven member is disconnected from the gear train, and the device is replaced, without the need for replacing the drive mechanism.

Multi-level oiling device drive mechanism

The temperature of a heated roller (1) is monitored by a heat sensor (19) which rests on metal rectangle (25) on polyimide strip (5). The top end of the strip is attached directly to the frame (3). the bottom end of the strip has a hole (7), which receives an arm (9a) of pivoted member (9). A coil spring (13) pivots member 9 to cause arm 9a to pull the strip into contact with the heated roller. Because of the wide contact and low force between the strip and the roller, wear is reduced and smooth operation is realized.

Wrapped temperature sensing assembly

Printer

A feed roll/paper deflector assembly for a printer or typewriter having a platen is described. The feed roll assembly is fabricated in such a way as to allow simple insertion into the printer or typewriter assembly and the retention of the feed roll assembly in a proper position within the typewriter by a hooking engagement with a paper release bail. Movement of the paper release bail will compress a spring allowing the paper deflector and feed rolls to be withdrawn from the periphery of the platen. The device allows automated assembly of the paper feed roll assembly into a machine and, in addition, provides complete self-alignment capability for the feed rolls with respect to the periphery of the platen.

Paper feed roller assembly for a typewriter or printer

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Lexington, KY, United States of America

Krikor Yosmali