Web transfer device
CA 2077513 A1 · Owner: Fujita, Norio · Inventors: Fujiwara, Haruyoshi; Iwata, Hiroshi; Fujita, Norio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
7. Abstract, This web transfer unit has the following component: elastic endless belt 55, pressure rolls 50 and 56 which press said belt 55 against hard roll 8a by way of the web belt, drive roll 55 to propel belt 55, tension roll 53 to supply said belt 55 tension, belt guide roll 54 and the pressure, device to press rolls 50 and 56 on hard roll 8a. The web transfer system generates the necessary level of draw to doff the web paper by utilizing the deformation of the elastic endless belt 55, described above, which develops when it is pressed against hard roll 8 a, although open draw is at zero.
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 September 3, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 3, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 3, 2014.
- 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.