The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 17, 1978
Filed:
Jun. 30, 1977
Malcolm Charles Ockwell, London, GB;
Patrick Hugh McLeod, London, GB;
Peter James Briggs, London, GB;
Matburn (Holdings) Limited, London, GB;
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.