The Mead Corporation

D Scott Proehl

Benjamin C Stone

Paul C Adair

Edward J Saccocio

Joseph G O'Connor

James A Dowler

George D Metz

Carl McCrary

A developer sheet useful in forming reproductions which have a controllable gloss finish or in forming transparencies comprising a support having a layer of a finely divided, thermoplastic, developer material on the surface thereof, said developer material being capable of reacting with a color precursor to produce a visible image and being capable of coalescing into a thin film which imparts gloss to said image upon application of heat and/or pressure. The developer sheet comprising a support having a layer of a finely divided thermoplastic developer material on the surface thereof can additionally comprise oil-containing microcapsules such that upon microcapsule rupture, the oil plasticizes the developer material.

Developer sheet useful in providing transparencies or reproductions

An apparatus for glossing a developer sheet is provided. The developer sheet has a thermoplastic developer resin on the surface thereof wherein the thermoplastic developer resin is capable of forming a film which imparts gloss upon the application of heat thereto. In the process, an arched plate is heated to a temperature sufficient to cause the thermoplastic developer resin to coalesce. The arched plate has a heat transfer limiting blanket thereon to maintain the flatness of the developer sheet. The developer sheet is fed between the convex side of the heated arched plate and a belt held snugly against the plate. The belt is driven so as to move the developer sheet over the heated arched plate.

Apparatus for glossing a developer sheet

A radiant glossing apparatus and method for glossing developer sheets having a thermoplastic developer resin on a surface includes a continuous heated support belt for the sheet. The belt carries the sheets under a source of radiant energy in the form of a quartz lamp and reflector which direct the energy downwardly onto the belt-supported sheets. The belt is heated by passing over an arched heated plate. A layer of friction material on the place imparts an electrostatic charge to the belt which assists in holding the sheets against the belt.

Radiant glossing apparatus for glossing developer sheets and a process

A process for glossing a developer sheet and an apparatus useful therein are provided. The developer sheet has a thermoplastic developer resin on the surface thereof wherein the thermoplastic developer resin is capable of forming a film which imparts gloss upon the applications of heat thereto. In the process, an arched plate is heated to a temperature sufficient to cause the thermoplastic developer resin to coalesce. The arched plate has a heat transfer limiting blanket thereon to maintain the flatness of the developer sheet. The developer sheet is fed between the convex side of the heated arched plate and a belt held snugly against the plate. The belt is driven so as to move the developer sheet over the heated arched plate.

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Miamisburg, OH, United States of America

D Scott Proehl