An ink jet printing system
CA 2245590 A1 · Owner: Gray, Colin · Inventors: Gray, Colin; Shacklock, Anthony John
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An ink jet printing system comprising a droplet generator (5) a supply tank , (3), supply transfer means for driving the ink from said tank to said generator and means for measuring the flow rate of the stream of ink droplets by monitoring the change of ink level in said tank said system including a , bleed connection (19) from the generator to the tank in closed circuit with said tank. An ink jet printing system comprising means for using measurements of the rate of change of liquid level in an ink supply tank to provide an indication that there has been a fault in the system. An ink jet printing system comprising a holding tank (101) for receiving liquid issued from the ink jet …
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 February 20, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 20, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 20, 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
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.