W. L. Gore & Associates, Inc.

E.i. Dupont De Nemours and Company

Tit-Keung Lau

Robert L Sassa

Alex R Hobson

Steven H Speck

Richard Andrew Bucher

The present invention is an improved release coating for use on a variety of elastomeric structures, such as printer rollers and belts. The coating of the present invention is a thin expanded polytetrafluoroethylene skin that has a porous surface attached to a substratum and an impermeable surface exposed as the contact surface. This use of dual surfaces on a single thin coating provides both an excellent bond to substratum materials, such as a silicone elastomer layer, as well as being highly wear resistant and resistant to chemical attack.

Fluoropolymer coated elastomeric rollers and structures

This invention provides a liquid metering and surface coating device which can satisfactorily perform the operation of applying a release liquid to at least the surface of toner image fixation rolls in plain paper copying, with exceptional accuracy, uniformity, and durability. The device comprises a porous support layer adhered to a metal shaft. The porous support layer is comprised of an open-celled thermosetting polymer foam internally reinforced to obtain the strength, resilience, and heat resistance needed for high durability in use as part of a hot toner image fixation mechanism in a PPC machine. The porous support is comprised of materials having high compatibility with and wettability by the liquids to be distributed and having high liquid holding capacity so as to provide smooth continuous liquid delivery. Adhered to the porous support layer is a liquid permeation control layer which is comprised of porous polytetrafluoroethylene film in which the pores contain a mixture of silicone oil and silicone rubber. Adhered to the outer surface of the liquid permeation control layer is a release layer which is comprised of a porous polytetrafluoroethylene film.

Low surface energy fluid metering and coating device

The present invention is an improved release coating for use on a variety of surfaces, such as printer rollers and belts. The coating of the present invention is an thin expanded polytetrafluoroethylene skin that has a porous surface attached to a substratum and an impermeable surface exposed as the contact surface. This use of dual surfaces on a single thin coating provides both an excellent bond to substratum materials, such as a silicone elastomer layer, as well as being highly wear resistant and resistant to chemical attack.

A process is disclosed for separating a series of substrate elements laminated with a supported photosensitive composition whereby the support is weakened by heating in a line pattern along abutting edges of the substrate prior to pulling the laminated substrates apart.

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Wilmington, DE, United States of America

Tit-Keung Lau