Patent ID: 9656901
Date: 2017-05-23
CPC Classifications: B32B,B65H,C03B,Y02P,Y10T

Claim:
1. A method of manufacturing a glass roll, comprising: forming, while conveying a glass film to a downstream side, the glass film by a forming device for carrying out a downdraw method; rolling the glass film continuously to the forming device while separably superposing a first protective film on the glass film at a downstream end of a path of the conveying in the forming to thereby manufacture a source glass roll; and unrolling, while conveying the glass film to the downstream side, the glass film from the source glass roll; and rerolling the glass film continuously roll while superposing a second protective film on the glass film at a downstream end of a path of the conveying in the unrolling to thereby manufacture a glass roll, wherein tension in a rolling direction is applied at a minimum level to the glass film in the rolling, and tension in the rolling direction is applied to the glass film in the rerolling in an amount that is higher than the tension in the rolling direction in the rolling.