Title:
板ガラス生産時の長尺ガラスシートの切断方法
Document Type and Number:
Japanese Patent JP4383346
Kind Code:
B2
Abstract:
In the method for cutting a continuously moving glass sheet with an inhomogeneous thickness distribution across the glass sheet, a cutting tool is moved across it at an angle to its travel direction to form a fissure and then the glass sheet is broken along the fissure. To avoid premature breakage in thin regions the applied cutting force is controlled by a controller based on control commands so that the cutting force is decreased when the glass sheet thickness decreases and is increased when it increases. In a preferred embodiment cutting force switchover points are based on an initial measurement of the thickness distribution. In another embodiment the thickness is continuously measured and the applied cutting force is automatically adjusted accordingly, so that the cutting force is greater when the thickness is greater, and vice versa.
Inventors:
John, Thomas
Morstein, Andreas
Morstein, Andreas
Application Number:
JP2004533293A
Publication Date:
December 16, 2009
Filing Date:
July 30, 2003
Export Citation:
Assignee:
Schott AG
International Classes:
C03B33/037; C03B33/023
Domestic Patent References:
| JP7089740A | ||||
| JP7196331A | ||||
| JP11302028A | ||||
| JP6102480A | ||||
| JP2002187732A | ||||
| JP2004505881A | ||||
| JP10236833A |
Foreign References:
| US3756104 |
Attorney, Agent or Firm:
Tadashi Hamamoto
Yoshiaki Sato
Yoshiaki Sato