Rubber-based paper feed rollers
AssigneeLexmark International, Inc.
InventorWilliam H. Barton
Life of this patent
Estimating the term…
Abstract
Paper moving rollers, for use in printer or duplicating machines, particularly those using an autocompensating feed system, are disclosed. These rollers have a long effective life and provide reliable single feed of paper while minimizing double and multiple feeds. The rollers are made from a rubber composition comprising isoprene rubber, at least one ozone-resistant rubber, such as EPDM, and a rubber curing system substantially soluble in the rubber mixture. The process for moving paper in a printer or duplicating machine using these rollers is also disclosed.
Claims28
A paper moving roller mounted on an auto compensating, pivotally-mounted swing arm, said roller, when in contact with paper, having initial light pressure against said paper wherein force applied through said swing arm to rotate said roller applies increased normal force against said paper until said roller rotates, said roller being made from rubber composition comprising:
- (a) isoprene rubber,
- (b) at least one ozone-resistant rubber, wherein the ratio by weight of (a):(b) is from about 75:25 to about 65:35, and
- (c) an effective amount of a rubber curing system substantially soluble in the mixture of (a) and (b).
A process for moving paper comprising:
- (1) contacting the face of a sheet of paper with one or more paper moving roller or rollers, said roller or rollers mounted on an autocompensating, pivotally-mounted swing arm said roller or rollers having initial light pressure against said paper and applying force through said swing arm to rotate said roller or rollers wherein said force applied through said swing arm to rotate said roller or rollers applies increased normal force against said paper until said roller or rollers rotate, said roller or rollers being made from a composition comprising
- (a) isoprene rubber,
- (b) at least one ozone-resistant rubber, wherein the ratio by weight of (a):(b) is from about 75:25 to about 65:35, and
- (c) an effective amount of a rubber curing system substantially soluble in the mixture of (a) and (b);
- and
- (2) causing said paper moving roller or rollers to rotate thereby, through frictional forces, moving said sheet of paper in the direction of said rotation.
Dependencies are inferred from the claim text.