Apparatus of making a compartment tray

Details Apparatus of making a compartment tray Apparatus of making a compartment tray

1978-03-27

1979-04-17

Flint, Jr., J. Howard

Plastic article or earthenware shaping or treating: apparatus

Preform reshaping or resizing means: or vulcanizing means...

Coacting shaping surfaces

4253871, 425403, B29C 1700

Patent

active

041498410

ABSTRACT:
A deep compartment tray includes compartments separated by dividers which extend to between one-third and substantially the full depth of the tray. The tray is constructed from sheet material, such as polyester coated paper milk carton stock. The pre-forming step and the forming step for the tray are conducted by a first female die defining the tray cavities or compartments, and surrounded by a first draw pad region, and a second male die including bosses or land areas in the compartment regions and recesses where the tray dividers are to be formed. The male die includes a set of cavities, one in each of the tray compartment regions. The cavities slidably receive plungers or inserts which are movably mounted in the cavities and are spring-urged to their fully projected positions in the cavities. A second draw pad surrounds the male die, and is mounted for resistive movement relative to the male die.

REFERENCES:
patent: 2760231 (1956-08-01), St. Clair
patent: 3172159 (1965-03-01), Edwards
patent: 3172927 (1965-03-01), Mojonnier
patent: 3173174 (1965-03-01), Edwards
patent: 3208104 (1965-09-01), Hensel
patent: 3232246 (1966-02-01), Nishkian
patent: 3256375 (1966-06-01), Bolelli et al.
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patent: 3305434 (1967-02-01), Bernier et al.
patent: 3324511 (1967-06-01), Micai et al.
patent: 3338997 (1967-08-01), Tigner
patent: 3465071 (1969-09-01), Edwards
patent: 3551954 (1971-01-01), Knowles
patent: 4025275 (1977-05-01), Gournelle

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