Xerox Corporation

Robert P Rebres

Raymond A Povio

James D Rees

Youti Kuo

Michael E Harrigan

Gerald M Garavuso

Christian O Abreu

Maurice F Holmes

David J Lemmon

John J Bigenwald

Don P Clausing

Theodore J Kellogg

Thomas R Alexander

Patrick T Ferrari

Thomas J Repp

Janice F Szocki Brooks

Suzzette R Solano

A system for decurling a sheet which is being advanced in a predetermined path within a printing machine includes a mechanism for generating a flow of room ambient air. The decurling system further includes a mechanism for directing the flow of room ambient air onto the sheet. Moreover, the decurling system includes a decurler adapted to apply mechanical force to the sheet after the flow of room ambient air has been directed onto the sheet by the directing mechanism. Finally, a mechanism is included for rotating the sheet to advance the sheet to the decurler in a direction substantially perpendicular to the direction of the predetermined path.

Sheet decurling system including cross-curl

A composite friction feed roll includes one material which feeds fresh paper well and another material which reliably feeds paper which has passed through fusing and has oil on its imaged surface. Such a roll will feed deplex and fresh paper or inserts equally reliably. Suitable material combinations would be silicone rubber which handles fused copies with ease, but has limited life feeding fresh or virgin paper because it collects fibers from fresh paper, and isoprene which is long lived handling fresh paper, but is rapidly contaminated by fuser oil. In the steady state condition, silicone regions will be primarily active in feeding duplexed paper while the isoprene oil contaminated, while in the plain paper feeding case, isoprene regions will be primarily responsible for feeding while the silicone becomes paper debris contaminated.

Friction retard feeder with a composite feed element

An apparatus for decurling a sheet is disclosed. The apparatus includes a decurler shaft and a first belt positionable to contact an arcuate portion of the decurler shaft. The apparatus further includes a second belt positionable to cantact the first belt and to bend around the arcuate portion of the decurler shaft. Moreover, the apparatus includes a mechanism for advancing the sheet between the first belt and the second belt so as to bend the sheet around the arcuate portion of the decurler shaft.

Apparatus for decurling a sheet

A document imaging system is compensated for distortion caused by non-planarity in the documents by providing a positive lens with varying power at a location beneath the document platen. In a preferred embodiment, an aspheric fresnel lens is used as the compensating optical element.

Imaging system for compensating for image distortion due to wrinkled or

A sheet feeding and separating apparatus includes a multiple piece entrance guide located between a stack from which sheets are to be fed and a retard nip. The guide includes a polycarbonate base member and a high friction urethane retard member. The urethane is ground on the leading edge to an exact angle to promote shingling of sheets and the breaking up of slugs prior to entering the retard nip.

Sheet feeding and separating apparatus employing a multiple piece

A dual purpose tri-roll inverter is disclosed as part of the normal paper path of a copier and has the capability of taking a sheet into the input side of tri-roll input/output members and continue feeding the sheet by the use of reversible rolls through an out of a channel portion of the inverter for further processing. Alternatively, when reversing of the sheet is required for duplexing, the reversible rolls are reversed by a reverse drive mechanism to propel the sheet while it is still in the inverter back toward the output side of the tri-rolls.

Reversing roll inverter with bypass capability

A retard feeder and separator apparatus adapted to sense the threat of a misfeed or multifeed and adjust the stack normal force of a feed belt against a stack of sheets accordingly. The apparatus includes a movable frame on which is mounted a sheet separating feed belt, a retard roll that forms a retard nip with the separating feed belt, and a stack force relief sensor. The sensor detects the lead edge of a sheet fed from a stack as it reaches the retard nip and causes a solenoid connected to the frame to trigger and move the frame slightly. The frame movement relieves the stack normal force of the feed belt against the stack from a high value to a low value while the sheet continues to be fed from the stack by the force in the retard nip and the lessened stack normal force. Alternatively, if the sensor does not sense a sheet within a predetermined period of time, the stack normal force will be increased to the original high value.

Growing community of inventors

Fairport, NY, United States of America

Robert P Rebres