Process and device for sealing a closing membrane on a spout
CA 2003988 C · Owner: Loliger, Willi · Inventors: Loliger, Willi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Bags having a spout opening defined by a spout edge surface affixed within the bags are sealed with a spout closure membrane first by pressing the closure membrane against the spout edge surface with a cooled plate. A heating unit which includes a heating element, which has a surface which corresponds in size and shape with the spout edge surface then is moved adjacent the cooled plate to heat a portion of the cooled plate for sealing the closure membrane to the spout edge surface. After heating the closure membrane for sealing the spout edge surface to the closure membrane the heating, element is moved away from the plate whereby the heated portion of the plate then cools and cools the …
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 27, 1989 and granted January 25, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 27, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 27, 2011.
- 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.