Apparatus for forming bound-layer sheet of paper
CA 1190075 A · Owner: Hasegawa Iron Works Co. Ltd. · Inventors: Hasegawa, Yusaku; Takeuti, Hiroshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A bound-layer type Fourdrinier papermaking machine is improved by providing its forming roll on the periphery thereof with circular or helical grooves. The air entrapped in the wedge-shaped gap between the forming roll and the endless felt belt advanced toward the forming roll is expelled through the grooves to, ensure production of a high-quality sheet of paper at a high speed. - 12 -
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 July 9, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 9, 2002.
- 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.