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:
Aug. 30, 2016
Filed:
Sep. 07, 2012
Hyukjun Kim, Daejeon, KR;
Kwangjin Chung, Daejeon, KR;
Cholho Lee, Daejeon, KR;
Yooseock Hwang, Daejeon, KR;
Juntae Choi, Daejeon, KR;
Kinam Chung, Daejeon, KR;
Hyukjun Kim, Daejeon, KR;
Kwangjin Chung, Daejeon, KR;
Cholho Lee, Daejeon, KR;
Yooseock Hwang, Daejeon, KR;
Juntae Choi, Daejeon, KR;
Kinam Chung, Daejeon, KR;
SK INNOVATION CO., LTD., , KR;
Abstract
A method for manufacturing a wide film comprises a casting operation, a stretching operation, and a trimming operation. The casting operation is a process of casting a film using a wide casting belt including a central belt, a left belt having a right end formed integrally with a left end of the central belt through a left joint in a length direction of the central belt, and a right belt having a left end formed integrally with a right end of the central belt through a right joint in the length direction of the central belt. The stretching operation is a process of stretching a film stripped off from the wide casting belt using a tenter. The trimming operation is a process of trimming predetermined parts of left and right sides of the stretched film. In the trimming operation, mark parts by the left and right joints are also trimmed.