Stretch control of materials to be laminated or joined
CA 1279247 C · Owner: Elmore, Dennis Clark · 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 controlling the stretch on two web materials being laminated comprising a supply roll of a first web material. Feed rolls with a tach generator feed back unit deliver the first material past at least two tension load cells before delivering the first material to a laminating roll where a second material has been delivered and whose stretch has been measured or determined independently or with a similar device. The signals of the tach generator and the load cells are delivered to a computer as inputs which provide an output to the unit necessary to control the stretch on the first web so it equals the stretch on the second. The necessary single output signal (to control the …
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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 January 22, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 22, 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.