Method and apparatus for injection blow molding pet containers
CA 1285113 C · Owner: Hoover Universal, Inc. · Inventors: Granata, John J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Method and apparatus for injection blow molding hollow articles from polyethylene terephthalate (PET) resin utilizing a hollow core rod on which a parison is first injection molded, and subsequently stretched and blown to form the hollow article. Fluid is continuously circulated through the hollow core rod to promote cooling of the plastic and insure the production of hollow articles that are transparent and of high quality from a clarity standpoint. A separate supply of blow air is provided at the blow molding station so as not to interfere with the continuous flow of coolant through the hollow core rod.
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 June 25, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 25, 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.