Ink jet head with vacuum reservoir
CA 2118394 A1 · Owner: Hine, Nathan P. · Inventors: Hine, Nathan P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Ink Jet Head with vacuum Reservoir, Abstract In the representative embodiments described in the specification, an ink jet head (10) includes an ink reservoir (23) supplying ink (24) to a series of pressure chambers (26) through corresponding supply passages (25) and a sealed vacuum reservoir (29) communicating with the pressure chambers (26) through a semipermeable wall (30) to extract dissolved air from the ink in the pressure chambers. In an alternative embodiment the head in-, cluded a vacuum pump to maintain a vacuum which is applied to the semipermeable wall (30). (Fig. 2)
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 18, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 18, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 18, 2016.
- 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.