Method of and apparatus for making a tubular filter element
CA 1055235 A · Owner: Incom International Inc. · Inventors: Papp, Louis S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus is capable of forming a tubular filter element of a filter material on a tubular mandrel which has a hollow interior and a cylindrical outer surface. A press roller within the mandrel forces the mandrel against a pair of drive rollers which can be rotated to cause the mandrel to rotate. The filter material is inserted between the drive rollers and the mandrel to cause it to be wound about the mandrel as the press roller applies sufficient force to insure that the filter material will be tightly wound about the mandrel. If the filter material is a nonwoven filter media of cured glass fibers or uncured glass fibers which have been set up from exposure the glass fibers are …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted May 29, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 29, 1996.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.