Preparation of impregnated fiber webs
CA 1055324 A · Owner: Chemische Industrie Aku-Goodrich B.V. · Inventors: Wietsma, Popke
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process is shown wherein an aqueous binder composition, preferably a latex binder composition is foamed and, applied as a layer of controlled thickness on a transfer roll rotating above a moving fibrous web but out of touch with the latter whilst suction is applied below the web in the region of the roll to draw the foam off the roll and into the web The web is subsequently dried. The process produces webs of improved hand because impregnation is accomplished with only the foam coming into contact with the web.
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 29, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 29, 1996.
- 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.