Support shaft for winding/unwinding sheets
CA 1266460 C · Owner: Kataoka, Hiroshi · Inventors: Kataoka, Hiroshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A support shaft is disclosed for winding/unwinding sheets comprising a ring having the outer periphery thereof formed with a plurality of inclined grooves circumferentially spaced apart and with the bottoms of said inclined grooves inclined in the circumferential direction. Rollers are accommodated in respective inclined grooves for rolling in the longitudinal direction thereof to progressively increase the extent of projection therefrom with rotation of said ring. An outer ring is provided with a gap surrounding said ring with rollers.
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 March 6, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 6, 2007.
- 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.