Method for forming a coated paperboard container

Details Method for forming a coated paperboard container Method for forming a coated paperboard container

1981-12-16

1983-04-26

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Producing multilayer work or article

264544, 264550, 4253871, B29C 1704

Patent

active

043812783

ABSTRACT:
A method for forming a deep drawn paperboard container coated with a layer of grease and water impermeable polymeric material. A paperboard blank is disposed between and acted upon by a heated mandrel and a heated mold to form a container. The surface of the blank engageable by the mandrel bears the polymeric coating, and means are operative relatively to move the mandrel and mold toward one another, to engage, the blank, and, just prior to fully engaging the blank to set the same, to introduce a film of air between the heated mandrel and the polymer coated surface to ensure against sticking of the coating to the mandrel.

REFERENCES:
patent: 3173174 (1965-03-01), Edwards
patent: 3321562 (1967-05-01), Wanderer
patent: 3357053 (1967-12-01), Lyon et al.
patent: 3933562 (1976-01-01), Cruckshank et al.
patent: 4026458 (1977-05-01), Morris et al.
patent: 4149841 (1979-04-01), Patterson

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