Method and apparatus for forming end panels for containers and end panels formed thereby
CA 1280701 C · Owner: Bulso, Joseph D. Jr. · Inventors: Bulso, Joseph D. Jr.; Mcclung, James A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of forming a container end panel having a countersink radius (R) and a chuckwall (CW) including preforming the radius and the chuckwall so that the chuckwall includes a straight wall portion (CW1) tangent to the radius and reforming and reducing the radius without tooling restraint while holding pressure against the straight wall area. Apparatus for performing the method includes a punch core (12) and a cooperating die core ring (63) having complimental geometry for forming the chuckwall and radius configuration. The article formed by the method and apparatus includes an end panel having a straight wall portion (CW2) between the normal tapered wall portion and countersink radius.
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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 February 26, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 26, 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.