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:
Nov. 23, 1982
Filed:
May. 06, 1980
Gerard Marbach, Cernay, FR;
Sevylor, , FR;
Abstract
This annular inflatable element comprises two ring-shaped elements interconnected by an inner closed belt and an outer closed belt. All these elements are welded together, and all the welds are of the sleeve coupling type without requiring any complementary or additional welding operation. The last sleeve-coupling weld is formed by placing the outer belt against the inner surface of the annular electrode, and the belt lips are folded firstly outwardly and then inwardly between the electrode and registering contra-electrodes. Paper welding barrier are interposed between the first and second folded portions of the belt lips, and the lips of the ring-shaped elements are placed against the contra-electrodes, respectively, so that the last two sleeve-coupling welds can be accomplished simultaneously. This invention is applicable notably to the manufacture of rubber dinghies.