Apparatus and method for forming a splice in advancing web of paper
CA 2290282 C · Owner: Sonoco Products Company · Inventors: Rhodes, David Earl; Usher, Willis Augustus Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus and method for forming a splice between the trailing end of an expiring web of paper or other material, and the leading end of a new web of material. The apparatus includes a clamp for engaging and stopping the advancing web, and a web severing mechanism to transversely move across and sever the stopped web. A new web holding assembly supports the leading end portion of the new web, and the holding assembly may be lowered to align the trailing and leading ends so that they may be joined by a tape or the like. The web severing mechanism includes a clamping wheel positioned to smooth the trailing end portion of the stopped web before it is severed by a following cutting wheel. …
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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 November 22, 1999 and granted March 18, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 22, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 22, 2021.
- 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.