US 4,268,345 AGranted

Continuous laminating system

AssigneeGeneral Binding Corporation

InventorMario E. Semchuck

Life of this patent

Estimating the term…

Loading patent…

Abstract

A continuous laminating system is disclosed wherein a pair of rotating laminating rollers are provided which form a laminating nip through which a product to be laminated together with sheets of laminating film are fed and pressed. A pair of rearwardly positioned pull rollers pull the laminating film through the laminating rollers together with the product. Adjacent each laminating roller a shoe-type heating member is provided which has a concave surface adjacent the respective laminating roller and a convex heating surface positioned so that the laminating film from each of the supply rollers slides over the heating surface and is heated prior to entry into the laminating nip. A Teflon-coated fiberglass layer is provided at least over portions of the convex heating surface over which the laminating film slides. Problems of scratching of the laminating film and squealing during processing are solved according to the invention.

Claims10

Dependent claims

A continuous laminating system, comprising:

a pair of rotating laminating rollers in contact to form a laminating nip through which a product to be laminated is fed;
a pair of driven pull rollers spaced downstream from the laminating rollers and also forming a nip;
a pair of laminating film supply rollers each supplying a continuous strip of laminating film positioned through the nip of the laminating rollers rearwardly to and through the nip of the pull rollers;
a heating member adjacent each laminating roller and having a concave inner surface adjacent to and having a surface curvature corresponding to a peripheral portion of the respective laminating roller, and a convex heating surface over which the respective laminating film slides prior to entering the nip formed by the laminating rollers;
and a layer of Teflon-coated fiberglass covering at least all portions of the convex heating surface directly over which the laminating film would otherwise slide whereby scratching of the laminating film is reduced, squealing caused by movement of the laminating film over the heating member is prevented, and effective heat transfer is maintained.

2 more elements

Dependencies are inferred from the claim text.