Apparatus for adjusting the creping conditions
CA 2115652 C · Owner: Ortemo, Bo Lennart Herbert · Inventors: Ortemo, Bo Lennart Herbert; Trelsmo, Karin Birgitta
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A creping doctor apparatus includes a creping doctor (4) having a doctor blade (5) with a working edge (6). The creping doctor (4) is pivotable around a rotational axis (12) formed substantially at the working edge (6) to permit adjustment of an impact angle (A) formed at the working edge (6) between an impact surface of the blade edge and the cylindrical surface (2) of a Yankee dryer (3) from which an, adhering paper web (1) is to be creped off. The impact angle (A) con-, trols the result of the creping operation e.g. the caliper and/or the, macrostructure of the soft crepe paper web produced but wear of the, working edge (6) gradually causes a change in the impact angle (A) and thereby, …
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 August 18, 1992 and granted March 18, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 18, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 18, 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.