Coinjection molded daisywheel printhead
CA 1300545 C · Owner: Decoste, Charles L. Jr. · Inventors: Aulick, Larry O.; Decoste, Charles L. Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of The Disclosure, A printhead is formed by injecting unfilled nylon by injection unit 1 and mineral filled nylon by injection unit 3. The filling adds impact resistance for printing, while the unfilled nylon is particularly resistant to flexural fatigue near the hub of the printwheel. Unit 1 is operated first to form an outer layer with, quantity limited so that the outer layer comes to about the middle of the arms of printheads. Unit 2 is then operated to form a core and to be the only material forming the character elements. The resulting printhead is durable and is capable of use at greater deflection than the same printhead made of only the impact resistant material.
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 May 12, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 12, 2009.
- 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.