Apparatus for maintaining hydrostatic pressure in an ink jet printhead
CA 2268404 A1 · Owner: Marconi Data Systems Inc. · Inventors: Sharpe, Colin R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An ink supply system for an ink jet printing device in which the elevation of the ink reservoir (40) is controlled as a function of the elevation of the printhead orifices (31). In a preferred embodiment the ink reservoir (40) is , mounted on an elevating carriage (60A 60B) which is mechanically linked to , the printhead (12) via a Bowden cable (50A 50B). The cable cooperates with a , pulley (30A 30B) on the printhead (12) such that rotation of the printhead (12) results in translational movement of the elevating carriage (60A 60B). , The dimensions of the pulley (30A 30B) are selected such that the elevational changes in the reservoir ink level correspond directly with the elevational …
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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 October 2, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 2, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 2, 2019.
- 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
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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.