American Can Company

Kenneth R Rentmeester

Gerald G Echternach

Leo A Stukas

John A Jurcenko

John D Welks

Eugene F Eike

A material for protecting the inside surface of a side seamed cylindrical container is disclosed. The material is of a thixotropic nature whereby edge protection is assured for a lap seam, a can seam or a welded seam, the latter being either a lap or butt-type joint. All of the foregoing constructions exhibit certain internal surface irregularities exposing raw metal to the interior of the container which must be appropriately covered in order to maintain sanitary protection of the contents ultimately packed within the container. Thixotropic materials have been found to provide the requisite surface adherence after application and until curing; thus, affording improved coverage of the various raw surfaces.

Side seam stripes

A system and method for applying a meat release was to a formed container prior to filling, sealing and processing by application of the wax at elevated temperatures via a hot melt spray and post application of heat to the empty coated container to fuse the hot melt wax into a continuous internal coating to act as a release agent for subsequently added comestibles and the like.

Hot spray

Tubular container bodies having a lap side seam, obtained by uniting a resin and an adhesive bondable therewith, are produced by applying the bonding resin to the limited lap area of body blanks moving in a continuous stream and applying heat to the limited lap area to cure the resin in less than one second; the resin may be so applied that the raw metal edge of the body blank is also coated. The resin may be subsequently reheated to the final state of cure in which it will bond to the tacky adhesive on the opposed lap margin of the body blank.

Container and method of forming

The raw metal edge on the inside lap in an adhesively-bonded lap side seam of a tubular body is protected from chemical attack by a corrosive substance from within the tubular body by applying a side seam adhesive along one marginal edge portion of the body blank, bending the other parallel marginal edge portion of the blank to form a crease thereon, rolling the blank into tubular form to place the adhesively-coated marginal edge portion and the creased marginal edge portion in an overlapping, facing position, and imbedding the creased marginal edge portion into a portion of the adhesive on the one marginal edge portion to bury the raw metal edge, the imbedding being achieved by compressing the overlapped marginal edge portions together to assemble the lap side seam of the tubular body.

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Barrington, IL, United States of America

Kenneth R Rentmeester