Drop-on-demand printhead
CA 1320385 C · Owner: Temple, Stephen · Inventors: Shepherd, Mark Richard; Temple, Stephen; Paton, Anthony David
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Drop-on-Demand Printhead, A drop-on-demand ink jet printhead comprises a body formed with a series of parallel ink channels with respective ink ejectors formed in a row at corresponding channel ends and having means for ejecting ink drops from the channels. A housekeeping manifold is fitted to the ejector ends of the channels and affords a trench extending parallel with the row of ejectors through which the ejectors discharge drops. Openings in the trench connect the trench with the manifold and duct means in the body serve for supplying environmental fluids to and exhausting such fluids from the region of the ejectors by way of the trench the openings and the manifold.
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
- Granted July 20, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 20, 2010.
- 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.