Bag mouth closure
CA 1269075 C · Owner: Formost Packaging Machines, Inc. · Inventors: Pace, Vincent C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Title: Bag Mouth Closure, ABSTRACT, A reclosable plastic film bag mouth closure includes bag mouth lips projecting beyond a heat-seal band closing the bag mouth and a stiffening patch bonded to the interior or exterior of a bag mouth lip between the heat-sealing band and the bag mouth end. The patch is of a length transversely of the heat-seal band so that it and the bag lips can be folded in two return bends for holding the bag mouth closed. The stiffening patches for the reclosable bag mouth end can be applied to a strip of sheet material for making bags at the time that the bags are formed and filled by clipping from a strip of patch-making material patch pieces having pressure-sensitive …
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
- Granted May 15, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 15, 2007.
- 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.