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:
Sep. 17, 2024
Filed:
Feb. 18, 2020
The Japan Steel Works, Ltd., Tokyo, JP;
Naoaki Yoshimatsu, Tokyo, JP;
Ichiro Nakajima, Tokyo, JP;
THE JAPAN STEEL WORKS, LTD., Tokyo, JP;
Abstract
A film stretching apparatus includes: a pair of first and second link devices configured to be able to carry and stretch a film and each composed of a plurality of links coupled to form an endless chain; a heat treatment unit configured to cover a central portion of the first and second link devices and perform a heat treatment to the film; a sprocket (first link drive mechanism) arranged outside the heat treatment unit and on an inlet side of the film and configured to drive the plurality of links; a sprocket (second link drive mechanism) arranged outside the heat treatment unit and on an outlet side of the film and configured to drive the plurality of links; and a sprocket (link adjustment mechanism) arranged outside the heat treatment unit and on the outlet side of the film and configured to reduce a pitch of the plurality of links.