Patent ID: 11964894
Assignee: NIPPON ELECTRIC GLASS CO., LTD.
Field: Other special machines (Mechanical engineering)
Classification: CPC C  B | IPC B  C

Claim 9:
10. The glass roll manufacturing method according to claim 8,
wherein the measurement step comprises measuring a length of the section from the leading end portion to the trailing end portion along the surface of the section as a third measurement length along a center portion of the effective portion free from the creases in addition to the first measurement length and the second measurement length, the center portion being positioned between the one side end portion and the another side end portion of the effective portion, and
wherein, when at least one of two differences comprising a difference between the first measurement length and the third measurement length and a difference between the second measurement length and the third measurement length is more than 500 ppm of a longest measurement length of the first measurement length, the second measurement length, and the third measurement length, a second adjusting step of adjusting to reduce the difference that is more than 500 ppm of the longest measurement length out of the two differences is performed.