US 12,291,476 B2
Production method for glass roll
Daisuke Nagata, Shiga (JP); Hiroki Mori, Shiga (JP); Masaya Fujisaki, Shiga (JP); and Yohei Kirihata, Shiga (JP)
Assigned to NIPPON ELECTRIC GLASS CO., LTD., Shiga (JP)
Appl. No. 17/770,119
Filed by Nippon Electric Glass Co., Ltd., Shiga (JP)
PCT Filed Oct. 13, 2020, PCT No. PCT/JP2020/038632
§ 371(c)(1), (2) Date Apr. 19, 2022,
PCT Pub. No. WO2021/106397, PCT Pub. Date Jun. 3, 2021.
Claims priority of application No. 2019-214273 (JP), filed on Nov. 27, 2019.
Prior Publication US 2022/0363581 A1, Nov. 17, 2022
Int. Cl. C03B 35/14 (2006.01)
CPC C03B 35/14 (2013.01) [C03B 2225/02 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A method of manufacturing a glass roll, the method comprising:
a conveying step of conveying a band-shaped glass film in a lateral conveying direction by a conveying device; and
a roll-up step of rolling up the band-shaped glass film into a roll shape,
wherein the conveying device comprises:
a first support portion and a second support portion which are arranged at an interval along the lateral conveying direction, and which are each configured to support the band-shaped glass film;
an intermediate conveying region formed between the first support portion and the second support portion;
a tension applying portion configured to apply a tension to the band-shaped glass film that passes through the intermediate conveying region;
a detection unit configured to measure a state of each of end portions in a width direction of the band-shaped glass film that passes through the intermediate conveying region; and
a control device configured to calculate a length of each of the end portions of the band-shaped glass film based on data measured by the detection unit,
wherein the conveying step comprises an inspection step of measuring the state of each of the end portions of the band-shaped glass film by the detection unit under a state in which the tension is applied to the band-shaped glass film that passes through the intermediate conveying region by the tension applying portion, and
wherein, in the inspection step, the control device calculates the length of each of the end portions of the band-shaped glass film based on the data measured by the detection unit, and then calculates a difference between the length of one of the end portions of the band-shaped glass film and the length of another of the end portions of the band-shaped glass film.