公开(公告)号：US12090688B2

公开(公告)日：2024-09-17

申请号：US17437043

申请日：2020-02-18

申请人： THE JAPAN STEEL WORKS, LTD.

发明人： Naoaki Yoshimatsu ,  Ichiro Nakajima

IPC分类号： B29C35/02 ,  B29C48/00 ,  B29C48/08 ,  B29C48/28 ,  B29C48/30 ,  B29C48/88 ,  B29C55/12 ,  B29C55/20 ,  B29C55/30

CPC分类号： B29C35/02 ,  B29C48/0018 ,  B29C48/08 ,  B29C48/28 ,  B29C48/30 ,  B29C48/911 ,  B29C55/12 ,  B29C55/20 ,  B29C55/30

摘要： 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.