Mold clamping for injection blow molding
CA 1069663 A · Owner: Farrell Plastic Machinery Corp. · Inventors: Farrell, John J.; Grazine, William J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention is an improved injection molding apparatus, and more specifically an injection blow molding machine. An injection mold and/or other molds have a movable part that is moved toward and from a fixed part to open and close the mold. Hydraulic motors supplied with high pressure liquid holds the molds closed. In order to conserve high pressure liquid, a small motor is used to open and close the molds and to move a piston of the high pressure hydraulic motor. Liquid under little or no pressure is drawn into the hydraulic motors as they are moved by the small motor. When the molds reach closed position communication of the hydraulic motors with the low pressure liquid supply is cut …
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 15, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 15, 1997.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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.