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:
May. 26, 1998
Filed:
Apr. 25, 1994
Jacques Obadia, Paris, FR;
Rical, S.A., Longvic Cedex, FR;
Abstract
Composite material for seals of plastic caps, especially of screw caps, ensuring leakproofing against liquids and imperviousness to gases at the same time, characterized in that it comprises, combined in a coherent multilayer structure, at least one middle layer (4) made of a plastic substance with a gas barrier effect, with a high modulus of rigidity, two outer layers (7) arranged on either side of the middle layer and consisting of a plastic substance with a low modulus of rigidity, each of the outer layers having a thickness greater than the thickness of the middle layer, and between the middle layer (4) and each outer layer (7) an intermediate layer (5) made of a substance of the same class as the outer layer, but with a high modulus of rigidity.