Title:
METHOD OF MANUFACTURING TUBE GLASS AND TUBE GLASS
Document Type and Number:
WIPO Patent Application WO/2019/176255
Kind Code:
A1
Abstract:
A cutting step in a method of manufacturing a tube glass includes a laser irradiating step and a stress applying step. In the laser irradiating step, a crack formed by first laser light L1 and a crack formed by second laser light L2 are propagated in circumferentially opposite directions of a tube glass G1 by scanning the first laser light L1 and the second laser light L2 so as to move away from each other from an irradiation start position SP.
Inventors:
TANAKA TAIKI (JP)
WADA MASANORI (JP)
WADA MASANORI (JP)
Application Number:
PCT/JP2019/000655
Publication Date:
September 19, 2019
Filing Date:
January 11, 2019
Export Citation:
Assignee:
NIPPON ELECTRIC GLASS CO (JP)
International Classes:
C03B33/095; B23K26/53; B28D5/00; C03B17/04
Domestic Patent References:
| WO2017068819A1 | 2017-04-27 | |||
| WO2017073118A1 | 2017-05-04 | |||
| WO2016208248A1 | 2016-12-29 |
Foreign References:
| JPH1171124A | 1999-03-16 | |||
| JP2017529311A | 2017-10-05 |
Attorney, Agent or Firm:
SHIROMURA Kunihiko et al. (JP)
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