Plastic article or earthenware shaping or treating: apparatus – Preform severing means – Diverse severing means
Patent
1981-07-09
1983-10-11
Czaja, Donald E.
Plastic article or earthenware shaping or treating: apparatus
Preform severing means
Diverse severing means
264 37, 264143, 425307, 425315, A23P 100
Patent
active
044089767
ABSTRACT:
A process for preparing thermoplastic piping for recovery of the thermoplastic in which the piping is cut into a continuous spiral ribbon with straightening of this ribbon to be without substantial curvature and cutting of the straightened ribbon into pieces. Preferably, the process produces pieces of thermoplastic of sufficiently small size to be suitable for feeding to an extruder. An apparatus for preparing thermoplastic piping for recovery of the thermoplastic which combines means for cutting the thermoplastic piping into a continuous spiral ribbon with means for straightening the spiral ribbon so that it is without substantial curvature and means for cutting the straightened ribbon into pieces.
REFERENCES:
patent: 2313986 (1943-03-01), Brown
patent: 3157079 (1964-11-01), Harper
patent: 3557268 (1969-02-01), Beretta et al.
patent: 4025598 (1977-05-01), Sasshofer et al.
patent: 4075916 (1978-02-01), Fisher
patent: 4292266 (1981-09-01), Weder et al.
Czaja Donald E.
Housel James C.
Phillips Petroleum Company
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