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:
Feb. 26, 1980
Filed:
Oct. 26, 1977
Sumitomo Electric Industries, Ltd., Osaka, JP;
Abstract
A method of welding a thermoshrinkable sheet comprises inserting between opposing faces of the sheet to be welded a piece of uncrosslinked resin tape containing peroxide, securing heat-resisting tapes on and adjacent outer faces of a welding portion of the sheet, and heating and pressing the welding portion. A device for use in the method includes a pressing plate having a heater, a receiving plate, a first link pivotally connected at one end to one end of the receiving plate and at the other end to the pressing plate, an operation lever pivoted on one end of the receiving plate, a second link pivotally connected to the free end of the operation lever and to the first link. The first and second links and the operation lever constitute a power amplifier mechanism in which the turning force of the operation lever is amplified to the pressure of the pressing plate through the second and first links.