Apparatus for providing bottom blanks for containers in a manufa

Details Apparatus for providing bottom blanks for containers in a manufa Apparatus for providing bottom blanks for containers in a manufa

1978-10-23

1981-12-22

Silbaugh, Jan H.

Plastic article or earthenware shaping or treating: apparatus

Preform severing means

Serially arranged with preform reshaping means

83 99, 83100, 83110, 83152, 156517, 156521, 425504, 425508, 425512, 493 67, 493108, B26D 706, B29C 1708, B32B 104, B32B 116

Patent

active

043068499

ABSTRACT:
The present invention is directed to an apparatus and method wherein bottom blanks for containers are severed from a web feed roll and subsequently transferred at a compatible speed and spacing to final forming mandrels on which finished containers are to be formed. The bottom blanks are tangentially transferred from a first transfer turret at a final velocity and spacing most desirable for cutting and minimizing scrap to a second transfer turret at a second velocity and spacing and thereafter tangentially transferred to the final forming mandrels. Subsequently, preprinted rectangular blanks of longitudinally stretch-oriented foam sheet material formed into cylinders are transferred onto the final forming mandrels. Thereafter, the bottom blanks the cylindrical blanks and the final forming mandrels are heated to shrink the cylindrical blanks so that they assume the shape of the final forming mandrels. The top curl on containers such as drinking cups and food tubs is formed after shrink forming. Further, the bottom seam of the container is reinforced by ironing after shrink forming.

REFERENCES:
patent: 972767 (1910-10-01), Jenkins
patent: 3104752 (1963-09-01), Rudszinat et al.
patent: 3159521 (1964-12-01), Pechmann
patent: 3174372 (1965-03-01), Huck
patent: 3611855 (1971-10-01), Thousand, Jr.
patent: 3969173 (1976-07-01), Amberg et al.
patent: 3983207 (1976-09-01), Sinnema
patent: 4083277 (1978-04-01), Lotz

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