Bottom seal horn and mandrel
CA 1046028 A · Owner: Ex-Cell-O Corporation · Inventors: Walke, Earl W. (Jr.)
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Vibration sealing apparatus including a vibrating horn and a stationary mandrel having rectangular work faces for opposing each other to seal a rectangular end closure of a thermoplastic coated paperboard carton. The work face of the vibrating horn defines an elongated depression extending between a pair of its opposite edges with a predetermined depth and also defines a pair of spaced depressions associated with each of the opposite edges. The spaced depressions have a depth greater than the elongated depression and each pair of the spaced depressions forms a pointed configuration that points toward the other pair of spaced depressions. Preferably, the spaced depressions of each pair have …
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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 January 9, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 9, 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.