Tubular core assemblies for rolls of paper or other sheet material
CA 1305462 C · Owner: Kewin, Dan · Inventors: Kewin, Dan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A tubular core assembly for a roll of paper or other sheet material has a hollow cylindrical core member formed by multiple wraps of paperboard material, and an annular collar within each opposite end portion of the core member. Each collar is a rigid body with an outer annular surface secured to the inner annular surface of the core member and an inner annular surface having a configuration complementary to the outer annular surface of a roll supporting chuck so that the chuck is receivable therein with a close fit.
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 21, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 21, 2009.
- 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.