Doctor bar for the volumetric metering of flowable materials onto a travelling web
CA 2026897 A1 · Owner: Knop, Reinhard · Inventors: Hoke, Ulrich; Knop, Reinhard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A doctor bar for volumetric metering of a flowable coating material onto a paper or cardboard web has an elongated body whose generally cylindrical periphery is defined by a surface distribution of discrete rises separated by troughs. Therises have outer faces lying in an imaginary surface coaxial with the body and which are straight in axial cross section. The total area of the faces constitutes 10% to 50% of the area of the cylindrical imaginary surface and the profile depth of the rises is between 30µm and 150µm.
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 October 4, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 4, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 4, 2012.
- 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.