Process for the adhesive binding of paper layers
CA 2011479 C · Owner: Ferag Ag · Inventors: Honegger, Werner
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The process for joining bundled paper layers 13 is based on the injection of binder into the layers. This binder injection 15 can consist of pressing binder into paper layers preperforated by needles 22 perforation either taking place beforehand or in the same operation by means of injection through hollow or tubular needles 22. Another possibility of binder injection 15 involves the shooting in of binder droplets. The after-treatment 16 of the paper layers can consist of pressing and/or ultrasonic action. Optionally binder injection only takes place into the inner pages 52 of the paper layer 13 without the cover page 51 and middle page 53.
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 March 5, 1990 and granted March 30, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 5, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 5, 2012.
- 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.