Insert molding method and a retractable insert- molding pin
CA 1211937 A · Owner: Mattel, Inc. · Inventors: Piotrovsky, Ralph K.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
of the Invention, The present invention pertains to an insert-molding method and, collapsible insert molding pin assembly. A molding insert is provided with a plurality of collapsible pin assemblies each including a hollow cylindrical, boss, a piston, a valve and a pin. The collapsible pin assemblies locate the molding insert in a mold cavity until pressure exerted by inflowing molding material causes the piston carrying the pin to retract into the hollow cylindrical boss.
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 September 30, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 30, 2003.
- 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.