Vacuum assisted beltless holddown for double backer
CA 2262164 A1 · Owner: Marquip, Inc. · Inventors: Marschke, Carl R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An essentially non-contact holddown system for a corrugator double backer utilizes vacuum pressure through the lower heating section which supports the double face, corrugated web. Continuous edge sealing membranes overlie the edges of the web and form, with the web edge and the surface of the heating section vacuum chambers into , which air is, drawn from the flute spaces in the double face web.
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 1, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 1, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 1, 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.