Floating adjustable gusseting wheel
CA 2014155 C · Owner: Dowbrands Inc. · Inventors: Nestle, Robert J.; Barker, David A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is an apparatus for introducing a gusset into a web of plastic film. the apparatus includes a pneumatically-biased protruding plate which varies the depth of the gusset to maintain a constant protruding plate-Film web tension in response to variations in the transverse width of the film web. Further disclosed is a means for holding the zipper laterally stationary and in alignment while the gusset is introduced into the film web by the same apparatus.
Read the whole patent
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 April 9, 1990 and granted December 7, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 9, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 9, 2012.
- 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.