Web roll retainer
CA 1050516 A · Owner: Bell And Howell Company · Inventors: Hertel, Heinz E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The disclosure relates to a web roll retainer for retaining a web roll and for maintaining constant resistance to rotation of the roll as the web is withdrawn. The web roll retainer includes an axial support member a roll end, support mounted at each end of the support bar in non-rotational relation to the support bar and end support holding means for maintaining the end supports in fixed axial relation on the support bar. Each end support includes an annular bearing surface for supporting a web roll extending between the end supports and for providing constant resistance to web roll rotation through friction resulting from the gravitational force between the web roll and the end support …
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 13, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 13, 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.