Apparatus for deforming a tubular slug of thermoplastic material

Details Apparatus for deforming a tubular slug of thermoplastic material Apparatus for deforming a tubular slug of thermoplastic material

1975-01-20

1976-07-13

Lazarus, Richard B.

Plastic article or earthenware shaping or treating: apparatus

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

Including shaping means comprising fluid pressure contacting...

425DIG204, 425DIG215, B29D 2303

Patent

active

039690601

ABSTRACT:
A tubular slug of thermoplastic material is preheated and is then gripped a position spaced from an open end of the slug, the gripping means being such as to effect a reduction in cross-section of the gripped portion of the slug. Such reduction in cross-section provides a shoulder which abuts the gripping means during application of pressure to the end face of the slug to deform the end portion thereof to provide a thread, groove or other profiled formation.

REFERENCES:
patent: 2810934 (1957-10-01), Bailey
patent: 3271489 (1966-09-01), Fogelberg et al.
patent: 3311950 (1967-04-01), Strauss
patent: 3422174 (1969-01-01), Hagen
patent: 3531556 (1970-09-01), Mehnert
patent: 3717429 (1973-02-01), Peters et al.
patent: 3792140 (1974-02-01), Schiemann
patent: 3843302 (1974-10-01), Petzetakis
patent: 3899279 (1975-08-01), Hudson et al.

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