Plastic and nonmetallic article shaping or treating: processes – With severing – removing material from preform mechanically,... – Making hole or aperture in article
Patent
1978-12-07
1981-06-09
Lowe, James B.
Plastic and nonmetallic article shaping or treating: processes
With severing, removing material from preform mechanically,...
Making hole or aperture in article
264145, 264163, 264284, 264293, 425304, B29C 1714
Patent
active
042724732
ABSTRACT:
The invention disclosed is an apparatus and method to make a thermoplastic film embossed with tapered bosses having perforations in the tips of each boss through use of a metallic pattern roll and a heated perforating roll. The apparatus and method allow a film having tapered bosses with decreased cross-sectional areas leading to a perforation to be formed without use of expensive vacuum forming methods.
The invention discloses a film 10 being heated by a heating means 14 to a deformable state and being embossed on an embossing surface 16 of embossing roll 13 under pressure from the silicone rubber surface 33 of first pressure roll 15. The film on the apex of the cone 26 on embossing surface 16 is removed to perforate the cone by perforating roll 17, which is a resilient hollow metal tube heated from a radiant heater mounted on the inside of the hollow metal tube. The perforated film is then embossed a second time by the action of a second embossing roll 18 and then rewound onto a rewind roll.
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Merz Theodore P.
Riemersma Coenraad E.
Braun Fredrick H.
Lowe James B.
O'Flaherty Thomas H.
The Procter & Gamble & Company
Witte Richard C.
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