Linerless plastic closure with integral sealing ring
CA 1286629 C · Owner: Zapata Industries, Inc. · Inventors: Zumbuhl, Bruno
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A linerless plastic closure has an integral frusto-conical sealing ring that seals with the rim of the neck of a container when the closure is applied thereto. The sealing ring has a hinge portion at an upper end thereof with a wall thickness that is small relative to that of an adjacent portion of the sealing ring, and has a preformed internal circumferential bead positioned to engage the rim at or near its top inner region. As the closure is applied to the container the outer portion of the sealing ring first engages the rim, and the sealing ring is easily deformed by virtue of the hinge portion. After the bead seats on the rim the sealing ring is stretched outwardly completely over the …
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 July 23, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 23, 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.
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.