Xerox Corporation

Earl V Jackson

Roger G Teumer

LeRoy A Baldwin

Gino F Squassoni

Herman A Hermanson

Wayne F Schoppe

Peter J Warter

Le Roy Baldwin

A method employing at least one separation roller continuously contacting the outside surface of a web and tracked to move in a fixed approximately elliptical path for compensating for web motion during separation of the web from another surface to enable a bead of accumulated material built up at the line of contact between the web and the other surface to pass therebetween without changing the web velocity. In a preferred embodiment, the system is employed in photoelectrophoretic imaging to bypass a bead of imaging suspension built up at the imaging nip during separation of two webs immediately after completion of imaging to thereby permit dissipation or passage of the liquid bead without changing the advancing web velocity.

Velocity compensation for bead bypass

A photoelectrophoretic imaging machine for producing, in a preferred embodiment, full color copies from opaque originals or, alternatively, copies from transparencies. station passing the sandwich In a preferred embodiment, the formation of photoelectrophoretic images occurs between two thin injecting and blocking webs at least one of which is partially transparent and the image formed is transferred to a paper web. The injecting and blocking webs may be disposable, thus, cleaning systems are not required. The injecting web is provided with a conductive surface and is driven in a path to the inking station where a layer of photoelectrophoretic ink is applied to the conductive web surface. The inked injecting web is driven in a path passing a deposition scorotron at the precharge station and into contact with the blocking web to form the ink-web sandwich at the imaging roller in the imaging zone. The conductive surface of the injecting web is grounded and a high voltage is applied to the imaging roller subjecting the sandwich to a high electric field at the same time as the scanning optical image is focused on the nip or interface between the injecting and blocking webs, and development takes place. The photoelectrophoretic image is carried by the injecting web to the transfer zone, into contact with the paper web at the transfer roller where the image is transferred to the paper web giving the final copy. In one preferred embodiment, machine components and subsystems are arranged and operated to accomplish the process steps of inking, imaging and transfer concurrently.

Photoelectrophoretic concurrent process cycling

A system employing at least one separation roller continuously contacting the outside surface of a web and tracked to move in a fixed approximately elliptical path, for compensating for web motion during separation of the web from another surface to enable a bead of accumulated material built up at the line of contact between the web and the other surface to pass therebetween without changing the web velocity. During the separation period, the advancing velocity of at least one surface is reduced so that at least one surface is advanced at a slower rate than its rate prior to separation, or stopped. In a preferred embodiment, the system is employed in photoelectrophoretic imaging to bypass a bead of imaging suspension built up at the imaging nip during separation of two webs immediately after completion of imaging to thereby permit dissipation or passage of the liquid bead without changing the advancing web velocity by reason of the separation operation. During the separation period, the surface, preferably a web, which does not carry the desired image, is advanced at a slower rate than its prior rate and slower than the other surface, or stopped.

Velocity compensation for bead bypass with speed reduction

A roller and mount assembly contained on a movable carriage, the mount adapted to allow the roller to pivot in at least one major direction in response to non-uniform transverse contact between the roller surface and the surface to be contacted.

Apparatus for contacting a roller to a surface to be contacted

A system for compensating for motion during separation of a web from another surface to enable a bead of accumulated material built up at the line of contact between the web and the other surface to pass therebetween without changing the web velocity. In a preferred embodiment, the system is employed in photoelectrophoretic imaging to bypass a bead of imaging suspension built up at the imaging nip during separation of two webs immediately after completion of imaging to thereby permit dissipation or passage of the liquid bead without changing the advancing web velocity.

Motion compensation for bead bypass

A system for separating one surface, preferably a web, from another surface to enable a bead of accumulated material built up at the line of contact between the two surfaces to pass therebetween. During the separation period, the advancing velocity of at least one surface is reduced so that at least one surface is advanced at a slower rate than its rate prior to separation, or stopped. In a preferred embodiment, the system is employed in photoelectrophoretic imaging to bypass a bead of imaging suspension built up at the imaging nip during separation of two webs immediately after completion of imaging to thereby permit dissipation or passage of the liquid bead. During the separation period, the surface, preferably a web, which does not carry the desired image, is advanced at a slower rate than its prior rate and slower than the other surface, or stopped.

Bead bypass speed reduction

A system employing at least one separation roller continuously contacting the outside surface of a web and tracked to move in a fixed approximately elliptical path for compensating for web motion during separation of the web from another surface to enable a bead of accumulated material built up at the line of contact between the web and the other surface to pass therebetween without changing the web velocity. In a preferred embodiment, the system is employed in photoelectrophoretic imaging to bypass a bead of imaging suspension built up at the imaging nip during separation of two webs immediately after completion of imaging to thereby permit dissipation or passage of the liquid bead without changing the advancing web velocity.

Growing community of inventors

Penfield, NY, United States of America

Earl V Jackson