Method and apparatus for foaming high viscosity polymer materials
CA 1255066 A · Owner: Nordson Corporation · Inventors: Cobbs, Walter H. Jr.; Huddleston, Robert J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Method And Apparatus For Foaming High Viscosity Polymer Materials, Abstract of the Disclosure Polymer materials having viscosities ranging from 1,000 up to above 1,000,000 centipoises are mixed with a gaseous foaming agent to provide a polymer/gas solution under pressure such that when the polymer/gas solution is subsequently dispensed at atmospheric pressure the gas is released from the solution and becomes entrapped in the polymer material to form a homogeneous polymer foam. Mixing is accomplished by a disc mixer which includes a tubular housing a pair of, substantially parallel, oppositely driven shafts extending along the length of the housing and a, series of spaced, solid, flat discs …
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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 June 6, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 6, 2006.
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Timeline
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.