PROCESS FOR THE CLOSURE AND SUBSEQUENT OPENING OF STERILIZABLE CONTAINERS, OPERCULAR COVERS USED IN CARRYING OUT SAID PROCESS AND PROCESS FOR MANUFACTURING SAID OPERCULAR COVERS

摘要

IN THE CANADIAN PATENT AND TRADE MARK OFFICE PATENT APPLICATION entitled : PROCESS FOR THE CLOSURE AND SUBSEQUENT OPENING OF STERILIZABLE CONTAINERS, OPERCULAR COVERS USED IN CARRYING OUT SAID PROCESS AND PROCESS FOR MANUFACTURING SAID OPERCULAR COVERS. in the names of : Guy François Valéry BOIRON Laurent KRETZ assignee : Société Anonyme dite: SOCIETE ALSACIENNE D'ALUMINIUM Process permitting the closure and subsequent opening of sterilizable containers, opercular covers used in carrying out this process and process for manufacturing the opercular covers. This process for the closure and easy re-opening of a container by using an opercular cover which is sealed by a "deep soldering" on the edge of the container? is characterlzed in that : - the materials involved in said deep soldering are of identical nature and are selected from high density polyethylene, polypropylene and polyester and format least one layer of thickness varying between 20 and 100 .mu.m ; - at least one of said materials involved in said soldering comprises between 15 and 50% by weight of an inert filler; the quantity of filler being selected, as a function of the nature of said material; so that the action of pulling on the opercular cover, causes an internal breaking of said filled material.