Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Patent
1977-06-30
1978-10-17
Wityshyn, Michael G.
Adhesive bonding and miscellaneous chemical manufacture
Methods
Surface bonding and/or assembly therefor
128283, 156269, 156289, 156290, 156301, 428 40, 428138, A61F 544, B32B 3118, B32B 3120
Patent
active
041207157
ABSTRACT:
The invention provides a method of making a filter for use in venting a colostomy or ileostomy bag. An assembly comprising a first sheet of a gas permeable and water impermeable material, a second sheet of material which is gas permeable or is rendered gas permeable by the provision of at least one aperture therethrough, and a sheet of carbon cloth between the first and second sheets is fed to a sealing station. In the sealing station the assembly of sheets is sealed together, preferably heat sealed by a weld extending through the periphery of the carbon cloth, to form a filter comprising two pieces of the above mentioned first and second sheets with a piece of the carbon cloth sealed therebetween. The filter is then removed from the remainder of the assembly.
REFERENCES:
patent: 3011932 (1961-12-01), Downing
patent: 3607585 (1971-09-01), Cassingham
patent: 3646936 (1972-03-01), Marsan
patent: 3897780 (1975-08-01), Trousil
patent: 3952727 (1976-04-01), Nolan
Briggs Peter James
McLeod Patrick Hugh
Ockwell Malcolm Charles
Liberman William R.
Matburn (Holdings) Limited
Wityshyn Michael G.
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