Seal bar insert
CA 2083807 A1 · Owner: Williams, Jerry L. · Inventors: Williams, Jerry L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A heat seal bar used in a plastic film packaging machine for cutting and sealing plastic films about wrapped products is provided with an insert having sealing surfaces and a knife cutting edge which is removably mounted to the seal bar. A first rectangular portion of the insert is adapted to be received within an elongate slot formed in a bottom surface of the seal bar for mounting the insert to the bar with screws. A second portion of semicircular cross section extends along the bottom of the first portion and thereby projects downwardly from the seal bar. A knife blade detachably mounted in the insert has a cutting edge extending below the seal bar. The cutting edge is defined by a pair …
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 November 25, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 25, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 25, 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.