Detection and control of stretch in film material
CA 1280680 C · Owner: Colgate-Palmolive · Inventors: Elmore, Dennis Clark
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A device for measuring and controlling the stretch in a web of film material to correspond to the predetermined stretch in a second web of material with both webs being fed to laminating rolls comprising a supply roll for said first material feed rolls, for pulling said first web of material from said supply roll an, endless belt for supplying an initial tension on said first web and operated by a motor. A dancer arm loaded by a pneumatic controlled piston to increase or decrease the tension on the first web of material, a photo electric scanner for measuring the width or thickness of said first web of material to provide an input to said pneumatically operated piston and a sensor and …
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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 February 26, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 26, 2008.
- 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.