Injection molding press
CA 1279455 C · Owner: Ube Industries, Ltd. · Inventors: Sonoda, Takefumi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In an injection molding press of the present invention a plunger is inserted into a barrel and a material inlet is provided on the rear side of the barrel. A valve seat is provided in the inner periphery of the barrel and a valve body which can be brought into contact with the valve seat is provided on the end of the plunger. In addition a, lengthwise moving unit is aligned with the plunger and when, the plunger is moved lengthwisely a portion having, increasing diameters is brought into contact with a portion having decreasing diameters so that a material passage is opened and closed. A sleeve is engaged in the end of the barrel in such a manner that it can slide in the axial direction of …
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 January 29, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 29, 2008.
- 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.