Method and apparatus for lining drums with plastic material
CA 1047720 A · Owner: Royal Packaging Industries Van Leer B.V. · Inventors: Repenning, William
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for producing a plastic lined drum using the drum shell as a mold element. The drum shell which is open at the top and at the bottom is positioned in a frame which engages the outer wall of the shell all around. The shell forms a seal a short distance below the open upper end of the shell sealing off the open bottom end of the shell as a bottom wall. A film of thermoplastic material extending across the open end at the top of the shell and a short distance therebeyond is heated to the stretchable stage to form a seal between a portion of the film extending beyond the open end of the shell and the portion of the frame in sealing engagement with the outer wall of the shell below the …
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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 6, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 6, 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.