US 3,943,024 AGranted

Paper welding apparatus for bookbinding machinery

OwnerBernard T. Sendor, Mortimer S. Sendorinventors

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Abstract

This invention bonds the paper pages of books without applying adhesive to the paper. Clamping jaws press the paper sheets of a book together along the edges that are to be bound. The paper is a weldable paper and the sheets bond to one another where they are clamped in contact and raised to a welding temperature by heat of one or both of the clamping jaws, radio frequency energy or otherwise. The temperature must be at least as high as the welding temperature of the paper and not so high that it will scorch or otherwise damage the paper. The clamping and welding apparatus are combined with other book-making machinery and located along the course followed by the unfinished book at a station where the welding step can be done automatically and with substantial saving in the usual labor required.

Claims12

Dependent claims

Apparatus for securing together the pages of a book that are made of paper sheets having surfaces throughout their entire areas incorporating a resin system that welds contacting edge portions of the sheets together when subjected to heat, said apparatus including assembling means that bring sheets of a book together in the sequence to one another in which they are intended to be bound, a welding station located along the path of travel of the sheets near a delivery end of the assembling means, conveyor means that move the sheets through the assembling means and welding station, clamping jaws at the welding station along the path of travel of the sheets and in position to grip the assembled sheets adjacent to the rearward edge regions of the sheets, as said sheets come from the assembling means, means for supplying welding heat to the rearward edge regions of the sheets to weld them together while gripped in said jaws, and mechanism for releasing the clamping jaws at the end of the welding operation for passage of the welded sheets from the welding station.

Dependencies are inferred from the claim text.