Chambered doctor blade device for printing unit, and printing unit
CA 2136342 C · Owner: Stenqvist, Jan · Inventors: Boose, Ake; Stenqvist, Jan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A chambered doctor blade device intended for a printing unit and adapted to coat a rotatable cylinder (2) with ink comprises an elongate frame (8) which is arranged parallel to and outside the cylinder (2) and on which are mounted two parallel elongate and spaced-apart doctor blades (9 10) to be resiliently, and scrapingly applied against the cylinder (2) in operative position. An elongate chamber (11) holding ink (12) is defined by the doctor blades (9, 10), the surface of the frame (8) facing the cylinder (2), and the circumferential surface of the cylinder (2). To achieve good flexural and torsional rigidity the frame (8), comprises at least two elongate interconnected metal sections …
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 May 19, 1993 and granted April 17, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 19, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 19, 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.