The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 30, 1977
Filed:
Apr. 12, 1976
David S Knudsen, St. Louis, MO (US);
Other;
Abstract
The open top of a container is surrounded by a rim having a curved upwardly presented surface and a slight ridge projecting upwardly from the curved surface. A seal membrane containing a metal foil extends over the open top of the container and seats against the ridge on the container rim. A flexible lid fits over the membrane and interlocks with the rim so that the membrane is interposed between the ridge and the lid. The lid has a downwardly opening annular groove which receives the container rim and this causes the seal to wrap generally around the curved upper surface of the rim. Once the lid and membrane are in place, the membrane is induction heated above the melting point of the container material, while a downwardly directed force is applied to the lid. The ridge, which is in contact with the seal membrane, melts down and thereafter is allowed to cool while the force is maintained on it, so that when the material solidifies, it is bonded to the membrane.