Method and apparatus for cooling a preform
CA 2053139 C · Owner: Nissei Asb Machine Co. Ltd. · Inventors: Fukai, Hidehiko
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to a method and apparatus of cooling and solidifying a preform comprising: introducing a preform in a heated state released from an injection mold into a cooling tube having a bottom opening and an upper opening through which cooling air flows from said bottom opening to said upper opening said bottom, opening being provided with turning means for cooling air, and inserting a cooling core into the preform to place said cooling core in close contact therewith said, preform being focibly cooled from interior and exterior thereof by cooling air flowing in a turning state between said preform and said cooling tube and a coolant supplied to said cooling core.
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
- Filed October 10, 1991 and granted November 1, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 10, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 10, 2013.
- 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.