Patent ID: 8980403
Filing Date: 2015-03-17
Classification: B23C,Y10T

Abstract:
1. A sheet member comprising: a plurality of optical films laminated together; an end face; and a cutting trace formed on said end face, said cutting trace extending at an angle of 75° or less to a longitudinal direction of said end face, wherein said end face is located on a thickness side of said sheet member, said end face is cut while rotating a cutting member having a rotation axis extending along a vertical direction of said end face and a cutting blade projecting to a side of said end face around the rotation axis, the cutting member is moved relatively to said sheet member along a longitudinal direction of said end face to be cut, and a part separated from a virtual line parallel to said end face and passing the rotation center in a cutting region formed by the rotating cutting blade is made to contact the end face of the sheet member.