Title:
ディスク基板成形用金型
Document Type and Number:
Japanese Patent JP4318992
Kind Code:
B2
Abstract:
To form a disk substrate 42 having a no information area at low cost and without failure, a mold 12 is provided for forming a disk substrate 42 having a no information area 44 . A cavity 32 of the mold 12 has a surface 50 corresponding to the no information area 44 and made of a mirror-surfaced plate 22 . A cylindrical member (sleeve 35 ) is inserted in an inner hole 38 of the mirror-surfaced plate 22 . An annular projection 33 is provided on the end surface of the cylindrical member adjacent to the cavity.
Inventors:
Toshiyuki Ebina
Application Number:
JP2003309496A
Publication Date:
August 26, 2009
Filing Date:
September 02, 2003
Export Citation:
Assignee:
Meiki Seisakusho Co., Ltd.
International Classes:
B29C45/37; B29C45/26; B29C45/34; B29C45/43; B29D17/00; G11B7/26; B29L17/00
Domestic Patent References:
| JP1182018A | ||||
| JP1264818A | ||||
| JP6071739B2 | ||||
| JP7042682Y2 |