A foil as a covering for an impression cylinder in rotary offset perfecting presses
CA 2077871 C · Owner: Heidelberger Druckmaschinen Aktiengesellschaft · Inventors: Wirz, Arno
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 foil as a cover for an impression cylinder in rotary offset perfecting presses which consists of a rigid support layer resistant to chemicals and wear and with good ink transfer behavior said foil having a calotte-structured surface of statistically uniformly distributed convex and concave structural elements and a chromium layer which forms the sheet-guiding outer cylindrical surface of the impression cylinder and has a microroughness-reducing effect and a, sheet is supported by the poles of the convex structural elements thereof. These convex structural elements have an oval shape, with the radius of curvature from pole to passage into the concave structural …
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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 July 6, 1993 and granted July 6, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 6, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 6, 2015.
- 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.