Method and apparatus for making drawn containers
CA 1065197 A · Owner: Kraft · Inventors: Miller, Roland E.; Valek, John; Scaletta, Joseph A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and apparatus for forming a drawn container from a metallic blank are disclosed wherein the blank is drawn over the outer surface of a stationary forming ring by an annular forming die to form a tubular wall portion which is thereafter completely redrawn by a forming punch in cooperation with a forming die, a reverse redrawn annular wall portion of the blank being positioned for engagement by a curling ring to form an inwardly curled rim at the peripheral edge of the open end of the container.
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 October 30, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 30, 1996.
- 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.