Apparatus for stretching a continuous plastics film in a packaging machine
CA 2080404 C · Owner: Ballestrazzi, Aris · Inventors: Ballestrazzi, Aris; Tassi, Lamberto
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus for stretching a continuous plastics film in a packaging machine, in which products fed one after the other are wrapped and sealed within said continuous film comprising a first, conveyor belt, a transverse welding apparatus and a second, conveyor belt, in which the transverse welding apparatus consists of a horizontally traversing carriage which supports a pair of superposed welding bars and a pressing belt facing the second conveyor belt. The conveyor belts are driven by a speed variator via a pair of transmissions; the first of which drives an end roller of the first conveyor belt and the second drives an end roller of the second conveyor belt by way of a linkage which …
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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
- Filed October 13, 1992 and granted May 28, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 13, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 13, 2014.
- 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.