Process for the manufacture of plastic pirn sleeves

Details Process for the manufacture of plastic pirn sleeves Process for the manufacture of plastic pirn sleeves

1974-03-28

1976-12-21

Kucia, Richard R.

Plastic and nonmetallic article shaping or treating: processes

With severing, removing material from preform mechanically,...

Forming continuous work followed by cutting

264151, 264209, 264210R, 264322, B29D 1500

Patent

active

039989194

ABSTRACT:
A process for making a plastic pirn sleeve bearing rows of circumferential fine grooves having flush ends to prevent filament entangling is disclosed. The process involves indenting the external surface of a thermoplastic tube by adjusting the temperature of the external surface of the tube to a temperature above its softening point, rolling at least three die wheels each in a separate path along the length of the surface of the tube while the tube is supported on a mandrel and at the same time pressing the die wheels against the surface of the tube to form permanent indentations therein.

REFERENCES:
patent: 2016425 (1935-10-01), Goessling
patent: 2922194 (1960-01-01), Lampard
patent: 2948919 (1960-08-01), Matthews
patent: 3089187 (1963-05-01), Wolfe
patent: 3095161 (1963-06-01), Atwood et al.
patent: 3435107 (1969-03-01), Conrad
patent: 3600918 (1971-08-01), Lemelson

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