Plastic and nonmetallic article shaping or treating: processes – With severing – removing material from preform mechanically,... – Simultaneous severing and shaping – or severing while work...
Patent
1977-03-28
1979-07-17
Pavelko, Thomas P.
Plastic and nonmetallic article shaping or treating: processes
With severing, removing material from preform mechanically,...
Simultaneous severing and shaping, or severing while work...
264252, 264257, 264273, B29D 2302
Patent
active
041615042
ABSTRACT:
A process for making a filter element for use in intravenous infusions, comprises positioning a filter fabric between two half molds and then injecting plastic material into the two half molds to provide a tubular filter element transected by the filter fabric. In order to promote bonding between the fabric and the plastic, and thereby to avoid the formation of a transverse plane of weakness in the filter element coincident with the plane of the fabric, the half molds are provided with spaced cutting means in the form of knives arranged in a peripheral series about the mold in such position as to penetrate the fabric at a plurality of spaced points when the mold is closed with the fabric between the mold halves.
REFERENCES:
patent: 1482045 (1924-01-01), Stearns
patent: 3077658 (1963-02-01), Wharton
patent: 3107991 (1963-10-01), Taussig
patent: 3408438 (1968-10-01), Staunton
patent: 3653098 (1972-04-01), Lagarde
patent: 3890679 (1975-06-01), Simon
Bieffe S.p.A.
Pavelko Thomas P.
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