Winding control finger surface rewinder with core insert finger
CA 2283310 A1 · Owner: Butterworth, Tad T. · Inventors: Butterworth, Tad T.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus (10) and method for rewinding large rolls of paper (12) into smaller rolls (22), such as bathroom tissue rolls. The rewinder (10) includes three rolls forming a winding cradle (24) and winding control fingers (30) operating adjacent to and in the winding cradle. Upper and lower winding rolls (16 and 20) are spaced apart for enough to allow a core (28) to be introduced between them by the winding control fingers (30). A rider roll (26) moves relative to the winding rolls (16 and 20) to control the diameter of paper (12) being wound. The lower winding roll (20) is preferably equipped with two sets of winding control fingers (30) which can orbit around the roll (20) and …
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 March 11, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 11, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 11, 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.