Thermoforming machine
CA 1162015 A · Owner: Hitek Construction Ltd · Inventors: Bogwitz, Wolfram E.R.; Flecknoe-Brown, Anthony E.; Keith, Donald G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In the thermoforming of a sheet of thermoplastic material opposed successions of tooling steps each carrying an array of forming tools are driven in the same forward direction and in converging and then parallel paths. A sheet of the heat softened thermoplastic material is fed between the forming tools adjacent the start of the convergence of the paths. The relative approach and forward movement of the tooling steps is controlled to bring the opposed forming tools into contact with the sheet and progressively form the sheet by counterthrust between the opposed tools. The sheet is drawn between the converging and parallel paths of the tooling steps and simultaneously is formed in accordance …
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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 February 14, 1984. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 14, 2001.
- 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.