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

Claim 0:
1. A glass roll comprising a band-shaped glass film, which is wound into a roll shape, and has creases formed thereon,
wherein the band-shaped glass film comprises an effective section in which one side edge and another side edge in a width direction extend in parallel to each other, and in which each of a leading end portion and a trailing end portion extends in parallel to the width direction of the band-shaped glass film,
wherein a difference between a first length and a second length is 400 ppm or less of a longer length of the first length and the second length, the first length being a length from the leading end portion to the trailing end portion along a surface of the effective section and along a first position along the one side edge of the band-shaped glass film and the second length being a length from the leading end portion to the trailing end portion along the surface of the effective section and along a second position along the another side edge of the band-shaped glass film,
wherein the first length and the second length are lengths when the effective section is formed to be its longest in the band-shaped glass film, and
wherein the creases form an unevenness of a surface of the band-shaped glass film without cracks and are not eliminated with an application of tension to the band-shaped glass film.