Production of composite products

Details Production of composite products Production of composite products

1976-12-10

1978-03-07

Hoag, Willard E.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

To produce composite, plural part or multilayered article

264328, 264339, 264342R, B29D 900, B29G 300

Patent

active

040780376

ABSTRACT:
A method of making a container, particularly a rectangular tray-like container, in which a blank is provided having side panels which are displaced to form the side walls of the container. The blank is clamped in its container - forming shape between mould tools with adjacent ends of the side panels juxtaposed end corner seams and a lip are injection moulded to seam the side panels and form a peripheral lip on the free edges of the side panels remote from the base panel. The mould tools shape the free edges of the side panels to an internally concave form between the juxtaposed side panel ends before moulding so that shrinkage of the moulding will accentuate the concavity to give a predetermined consistent shape to containers so produced and avoid unpredictable buckling and deformity.

REFERENCES:
patent: 3154617 (1964-10-01), Schenk et al.

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