Method and device for the continuous embossing of a thermoplastic film
CA 1281157 C · Owner: Heimrich, Klaus · Inventors: Heimrich, Klaus; Bottcher, Hugo; Hildebrant, Gustav
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A device for embossing a grain pattern on a thermoplastic film comprising means for heating the film and a pair of embossing rolls one, roll having a silicone rubber matrix blanket carrying a negative impression of a leather grain. A method for producing the matrix for the embossing cylinder which has a uniform pattern design in the marginal areas adjoining the abutment where the ends of the blanket are joined to form the tube comprising 1) casting liquid silicone rubber on a sheet of leather having the desired grain and vulcanizing the silicone 2) using the matrix thus, formed to emboss under heat and pressure in a press, a rectangular sheet of thermoplastic resin such as polyvinyl …
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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 March 12, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 12, 2008.
- 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.