Method for the recovery of thermoplastic from piping for reproce

Details Method for the recovery of thermoplastic from piping for reproce Method for the recovery of thermoplastic from piping for reproce

1983-06-15

1985-02-12

Woo, Jay H.

Plastic and nonmetallic article shaping or treating: processes

Recycling of reclaimed or purified process material

Of gaseous process material

264140, 264145, 264157, B29C 2900

Patent

active

044990375

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: 3360414 (1967-12-01), Tuthill
patent: 3557268 (1971-01-01), Beretta et al.
patent: 4141773 (1979-02-01), Keuchel
patent: 4235579 (1980-11-01), Kurz et al.
patent: 4287147 (1981-09-01), Hungerford

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