A single tier drying section apparatus
CA 2177083 A1 · Owner: Mcgraw, William R. · Inventors: Pulkowski, Jeffrey H.; Mcgraw, William R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A single tier drying section apparatus (10) is disclosed for drying a web of paper (W). The drying section (10) includes a first and a second dryer (12 14) which are disposed in a single tier (16) for drying the web (W). A vacuum roll (18) is disposed closely adjacent to and between the first and second dryers (12 14) for guiding the web (W) from the first to the second dryer (12 14). The vacuum roll (18) includes a rotatable roll shell (22) having a first and a second end (24 26). The shell (22) defines an outer surface (28) and an internal chamber (30) which extends between the first and the second end (24. 26) of the shell (22). The shell (22) defines plurality of channels (32. 33. 34) …
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 November 21, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 21, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 21, 2016.
- 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.