| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method for manufacturing an optical film product by punching a sheet or a long roll of an optical film, wherein top and back faces and upper and lower sides of an optical film product are reliably and easily discriminated and an optical film product is reliably manufactured at high yield. <P>SOLUTION: In the method of manufacturing an optical film product by punching a sheet or a long-length roll of an optical film, the sheet is punched with a cutting die comprising a punching blade die with an additional marking blade so as to leave an imprint of the marking blade on the optical film. <P>COPYRIGHT: (C)2007,JPO&INPIT |
