Device for drying paper webs, especially tissue paper webs
CA 2420798 C · Owner: Hiebaum, Johann · Inventors: Hiebaum, Johann; Promitzer, Wolfgang
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a device for drying paper webs especially tissue , paper , webs, with a dryer cylinder 1 and a dryer hood 2 3 for blowing hot air onto , the , paper web. Currently dryer hoods have drawbacks, caused especially by different gaps between the dryer cylinder and the dryer hood during operation leading to non-uniform drying. The aim of the invention is to provide a device for , efficient, uniform drying of a paper web especially a tissue paper web, at , high temperatures. The invention is mainly characterised by the inlet air parts of the , dryer hood 2, 3, such as the nozzle basket 9 or the inlet duct 4 being , uncoupled , from the frame or hood structure 10. This …
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 February 27, 2003 and granted February 1, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 27, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 27, 2025.
- 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.