Plastic article or earthenware shaping or treating: apparatus – Preform reshaping or resizing means: or vulcanizing means... – Rod or tubular preform
Patent
1979-11-09
1981-11-03
Pavelko, Thomas P.
Plastic article or earthenware shaping or treating: apparatus
Preform reshaping or resizing means: or vulcanizing means...
Rod or tubular preform
264230, B29C 2700
Patent
active
042983312
ABSTRACT:
A fabricated cup or other container in which the sidewall is formed from a rectangular sheet-like blank of an oriented thermoplastic material, the blank having its ends joined to one another to form a cylindrical sleeve with a liquid-tight seam, the blank having a relatively high degree of orientation extending circumferentially of the sleeve, the fabrication of the sidewall from the sleeve being accomplished by telescoping the sleeve over a substantially cylindrical mandrel, by exposing the sleeve to heat to cause it to shrink into conformity with the external configuration of the mandrel and by completing the cup by pressing the bottom and forming a beaded rim.
The apparatus for fabricating the container includes a mandrel carrying drum that revolves through a series of work stations that insert a sleeve of thermoplastic material on the mandrel, subjects it to softening heat which permits the sleeve to conform to the mandrel and protrude in part therefrom, presses the protruding material of the sleeve into a container bottom while substantially simultaneously forming a bead-like rim on the container and ejecting the completed container from the mandrel.
REFERENCES:
patent: 2792593 (1957-05-01), Hardgrove
patent: 3967991 (1976-07-01), Shimono
patent: 3970492 (1976-07-01), Amberg
patent: 3995740 (1976-12-01), Amberg
patent: 4053346 (1977-10-01), Amberg
patent: 4072549 (1978-02-01), Amberg
patent: 4077829 (1978-03-01), Pupp
patent: 4108347 (1978-08-01), Amberg
patent: 4111738 (1978-09-01), Amberg
patent: 4121402 (1978-10-01), Cress
patent: 4215460 (1980-08-01), Amberg
Birchall David R.
Click Myron E.
Owens--Illinois, Inc.
Pavelko Thomas P.
Wilson David H.
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