Method and apparatus for manufacturing foam plastic containers b

Details Method and apparatus for manufacturing foam plastic containers b Method and apparatus for manufacturing foam plastic containers b

1980-07-17

1982-12-28

Culver, Horace M.

Package making

Apparatus for forming or partially forming receptacle and...

Forming a receptacle around a mandrel or former and removing...

493109, 493296, 156 86, 156475, B65B 302, B65B 4308

Patent

active

043654606

ABSTRACT:
The present invention is directed to an apparatus and method wherein preprinted rectangular blanks of longitudinally stretch-oriented foam sheet material are continuously formed into cylinders by a tubular forming mandrel on which the blanks are folded, seamed and thereafter transferred onto final forming mandrels. Subsequently, the blanks and the final mandrels are heated to shrink the blanks so that they assume the shape of the final forming mandrels. In forming containers, means are provided to place bottom blanks on the product mandrels prior to the loading of the cylinders thereon so as to shrink the cylinders to sidewall shapes overlying the bottom blanks. The top curl on containers such as drinking cups and food tubs is formed after shrink forming. Further, the bottom seam of the container may be reinforced by ironing after shrink forming.

REFERENCES:
patent: 1934540 (1933-11-01), Heywood
patent: 2825281 (1958-03-01), Heywood
patent: 2915952 (1959-12-01), O'Neil
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patent: 3035498 (1962-05-01), Molla
patent: 3062532 (1962-11-01), Galatha
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patent: 3139012 (1964-06-01), Senfleben
patent: 3256970 (1966-06-01), Fievet
patent: 3351174 (1967-11-01), Wommelsdorf et al.
patent: 3495506 (1970-02-01), Plymate
patent: 4121402 (1978-10-01), Cress et al.

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