Pneumatic clamping mandrel for coreless web winding machines and positioning device thereof
CA 2306470 A1 · Owner: Prati, Pietro · Inventors: Prati, Pietro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns a mandrel (1) suitable for coreless web winding machines. The mandrel lodges two expanders (2 3) pneumatically acted by means , of cylinders (4 5). One of the expander is suitable for gripping and clamping the leading edge of the band to be wound for obtaining coreless rolls. The invention includes, in combination, a device for the transport of the leading edge of the band to the clamp of the mandrel.
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
- Filed October 13, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 13, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 13, 2020.
- 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.