Patent ID: 8887396
Filing Date: 2014-11-18
Classification: B26D,B31F,Y10T

Abstract:
1. A method for making a roller used for manufacturing a retarder film, comprising: providing the roller having a roller surface; providing an embossing tool having an embossing end; and embossing the roller surface repeatedly with the embossing tool; wherein the embossing end has a plurality of first micro-groove structures and a plurality of second micro-groove structures; the first micro-groove structures and the second micro-groove structures are structures with parallel micro-grooves; the respective first micro-groove structures are symmetric to the respective second micro-groove structures with respect to a symmetry line, one end of each of the first micro-groove structures correspondingly connects with one end of each of the second micro-groove structures at the symmetry line; and a first included angle between the symmetry line and each first micro-groove structure and a second included angle between the symmetry line and each second micro-groove structure are 45±8 degrees.