Apparatus in connection with a headbox of a paper machine or equivalent
CA 2525346 C · Owner: Kemilaeinen, Ilkka · Inventors: Kirvesmaeki, Jarmo; Kemilaeinen, Ilkka; Lappi, Janne
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Headboxes of modern paper machines often include a dilution system. Older headboxes are , difficult and expensive to retrofit with dilution systems requiring heavy , machinery and , numerous valves. The present invention of a headbox dilution apparatus comprises a body , having a plurality of mixing chambers. Dilution water (arrow L2) is conducted through at , least two rows of ducts (12a1 12a2...) into each body mixing chambers (13a1 13a2...). Each , mixing chamber (13a1, 13a2...) is limited by vertical walls (T1) a bottom , wall (T2) and a , covering wall (T3) and a partition wall (16a1, 16a2...). The ducts (14a1.1 14a1.2...) on the , inlet side of the mixing chamber extend into the …
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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 6, 2004 and granted April 3, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 6, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 6, 2026.
- 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.