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:
Mar. 06, 1979
Filed:
May. 11, 1977
Tadashi Suzuki, Saitama, JP;
Sato Gosei Co., Ltd., Tokyo, JP;
Abstract
A method for stretching at a high speed an attachment device composed integrally of a synthetic resin and comprising a head, a cross-bar and a filament connecting integrally the head and cross-bar to each other in disclosed. This method comprises applying to the attachment device a force in a direction separating the head and cross-bar from each other while the filament is in the heated state and the head and cross-bar are in the gripped state, thereby to stretch the filament, and immediately thereafter, applying a relaxing action to the filament and releasing the attachment device from gripping means. The ratio of relaxation of the filament after stretching is ordinarily 10 to 40% and is preferably 20 to 35%.