Surgery – Male reproductory tract shields or birth control devices – Condoms
Patent
1993-08-11
1995-11-28
Barry, Chester T.
Surgery
Male reproductory tract shields or birth control devices
Condoms
1562722, 1562744, B32B 3100
Patent
active
054698634
ABSTRACT:
A method of welding at least two layers of a thin thermoplastic polyurethane elastomer (10A, B) to form a weld seam (12) to produce polyurethane barrier products such as, but not limited to, gloves (20), condoms (30), inflatable catheter balloon cuffs (48A, B), ostomy pouches (50), organ bags (60), and instrument covers (70) through a process of pre-heating a sealing die platen, the at least two layers of the polyurethane (10A, B) softened while under pressure from the preheated die platen, followed by welding the at least two layers of polyurethane (10A, B) film by transmission of a radio-frequency energy to the film (10A, B) to produce a weld seam (12) and then allowing the weld seam (12) to cool, the resultant product having seam integrity.
REFERENCES:
patent: 4852586 (1989-08-01), Haines
patent: 5024852 (1991-06-01), Busnel et al.
patent: 5191902 (1993-03-01), Wilk
patent: 5335675 (1994-08-01), Wheeler
Barry Chester T.
Polygenex International, Inc.
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