E.i. Dupont De Nemours and Company

Stephen Cushner

Roxy Ni Fan

Ernst Leberzammer

Paul Thomas Shea

Carol Marie Van Zoeren

Edward Andrew Calisto

Daniel Francis Sheehan, Jr

Melvin H Johnson

Mark A Hackler

Anandkumar R Kannurpatti

John Anthony Quinn

Albert H Ohlig

Robert Finley Drury

David Anthony Belfiore

Robert Lee Brown

Robert J Verbiar

Steven W Nelson

Anandkumar Ramakrishnan Kannurpatti

Melvin Harry Johnson

A method and apparatus for thermal processing a photosensitive element includes heating a composition layer on a flexible substrate to a melt temperature of an unirradiated area of the composition layer and maintaining the flexible substrate at a temperature below the melt temperature while pressing a heated absorbent layer against the heated composition layer, and repeating these steps for multiple cycles. A further embodiment of the method includes a step of cooling the flexible substrate and layer laminate on each cycle to maintain the flexible substrate at the desired temperature below that of the heated composition layer.

Method and apparatus for thermal processing a photosensitive element

The present invention relates to methods and apparatus for forming seamless cylindrical photosensitive elements of uniform thickness on flexible sleeves. The apparatus for forming a seamless cylindrical photosensitive element of uniform thickness on a flexible sleeve, comprises a mandrel, a mandrel support assembly, a calendering assembly, a drive system and at least a heating element. The methods comprise forming seamless cylindrical photosensitive elements of uniform thickness on flexible sleeves from a stream of molten photopolymerizable material, or a solid or molten sheet of photopolymerizable material. The seamless cylindrical photosensitive elements are formed on polyester sleeves for use on a printing cylinder.

Methods and apparatus for forming cylindrical photosensitive elements

A process for making a multilayer flexographic printing plate which involves reinforcing and laser engraving a multilayer flexographic printing element.

Lasers engravable multilayer flexographic printing element

A process for making a single layer flexographic printing plate which involves reinforcing and laser engraving a single layer flexographic printing element.

Laser engravable single-layer flexographic printing element

An exposure unit and method for imaging a photosensitive material includes a source of radiation for exposing the photosensitive material to actinic radiation such that the radiation strikes the photosensitive material at a plurality of angles of incidence, and apparatus for moving the radiation source relative to and in a plane parallel to the photosensitive material. The exposure unit also has a reflector for controlling (1) the proportion of (a) radiation having perpendicular angles of incidence to (b) radiation having non-perpendicular angles of incidence, such that the radiation having non-perpendicular angles is increased, and (2) the distribution of non-perpendicular angles of incidence.

Exposure unit and method for exposing photosensitive materials

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Lincroft, NJ, United States of America

Stephen Cushner