Apparatus for converting thermoplastic film into an open-work sh

Details Apparatus for converting thermoplastic film into an open-work sh Apparatus for converting thermoplastic film into an open-work sh

1982-09-30

1983-12-27

Lowe, James B.

Plastic article or earthenware shaping or treating: apparatus

Preform severing means

425290, 425363, 425365, 425384, B29C 1702, B29D 2700

Patent

active

044228376

ABSTRACT:
A two-dimensional integral net having a nap in form of relatively long fibres which are integral with the net and protrude from the edges which surround the apertures of the net.
A method of producing this net from a film is by heating selected areas of the film to a molten state and dragging out this molten material into fibres to leave apertures in the film while controlling the fibre-dragging by cooling with an air jet.

REFERENCES:
patent: 3159696 (1964-12-01), Hodgson, Jr.
patent: 3345242 (1967-10-01), Rasmussen
patent: 3399425 (1968-09-01), Lemelson
patent: 3441638 (1969-04-01), Patchell et al.
patent: 3515778 (1970-06-01), Fields et al.
patent: 3574804 (1971-04-01), Joonase
patent: 3632716 (1972-01-01), Fairbanks
patent: 3708565 (1973-01-01), Seiffert
patent: 4000230 (1976-12-01), Brendel

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