Flexible thermoplastic pouches having easy-open tear strip means and apparatus for making same
CA 1311449 C · Owner: Fabisiewicz, Eugene · Inventors: Fabisiewicz, Eugene; Fagan, Jack R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A flexible thermoplastic pouch having an easy-open tear strip means secured thereto is provided. According to one embodiment of the present invention, a tear strip is secured to an imperforate sidewall of a flexible pouch along two sawtooth securement lines arranged generally in the shape of an ellipse. The point where the two securement lines converge is given a W-shape, which provides two points of high stress concentration. When the user grasps and pulls the tear strip means the, securement lines rupture precisely at these two points of stress concentration and continue along the sawtooth securement lines thereby providing the pouch with a dispensing opening of predetermined size, shape, …
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 December 15, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 15, 2009.
- 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.