Initial crack forming apparatus and forming method

摘要

An initial crack group in which a plurality of initial cracks C are gathered in the width direction perpendicular to the transport direction B at the end Ga by scratching the end Ga on the front side in the transport direction B of the glass ribbon G transported by the belt conveyor 3. The initial crack forming apparatus 1 for forming CG has a flap wheel 4 for scratching the end Ga while rotating the glass ribbon G in the direction of drawing in the transport direction B, and the rotational peripheral speed of the flap wheel 4 is the glass ribbon. It was configured to be faster than the G conveyance speed.