Apparatus for internally embossing trays formed from a foil of f

Details Apparatus for internally embossing trays formed from a foil of f Apparatus for internally embossing trays formed from a foil of f

1986-01-07

1987-06-02

Spitzer, Robert

Plastic article or earthenware shaping or treating: apparatus

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

Including shaping means comprising fluid pressure contacting...

425405R, B29C 1704

Patent

active

046699694

ABSTRACT:
This invention relates to an apparatus for embossing hot molded plastic foil which comprises one or more banks of multiple embossing elements mounted on a rotatable wheel operated in cooperation with a hot-molding machine supporting multiple mold cavities. The embossing surface of each element has a curvilinear lateral profile and rotates around the wheel axis in a direction opposite to the rotation of the drum of the hot-molding machine in a manner synchronized to the rotation of the drum so that each embossing surface meshes with a corresponding mold, pressure embossing the hot plastic form molded therein. The peripheral speeds of the mating surfaces of embossing element and mold, as well as the embossing pressure, are controlled by interlocking the respective drive mechanisms, plus suitable elastic means, so that no slippage can occur in the mold cavity upon contact between the surfaces at high rotational speeds.

REFERENCES:
patent: 2297504 (1942-09-01), Salvaneschi
patent: 3488413 (1970-01-01), Watts, Jr.
patent: 3577594 (1971-05-01), Al-Roy
patent: 4284396 (1981-08-01), Thissen et al.
patent: 4397804 (1983-08-01), Medwed
patent: 4515546 (1985-05-01), Medwed
patent: 4521175 (1985-06-01), Medwed

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