Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
OPTICAL DISK
Document Type and Number:
Japanese Patent JPH01264639
Kind Code:
A
Abstract:

PURPOSE: To facilitate the administration of the optical disk in the production process from injection molding to packing by putting a mark for title identification to a specific region in the non-recording area where information is not recorded by transferring from a stamper.

CONSTITUTION: The part between from the innermost circumference 5 to the inside circumference 3 of the recording surface is formed as the non-information recording area between the outside circumference 2 to the inside circumference 3 of the optical disk 1. A serial number 6 and the mark 7 for title identification are put to the part excluding a label sticking part 4 in this non-information recording area. The serial number 6 and the mark 7 for identification are attached by the method of previously putting the mark for title identification to a stamper and putting the mark 7 to the optical disk 1 by transfer. The weight balance of the disk 1 is measured and directions of the optical letters of the serial number 6 are matched in the direction where there is the weight unbalance, then the serial number 6 is put by marking. The administration of the optical disk is thus facilitated in the production process from the injection molding to packing.


Inventors:
IRIE SHOICHI
Application Number:
JP9137588A
Publication Date:
October 20, 1989
Filing Date:
April 15, 1988
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
HITACHI LTD
International Classes:
B29C45/00; B29C45/26; B29C45/37; B29D17/00; G11B7/24021; G11B7/24047; G11B7/24094; G11B7/24097; G11B7/26; (IPC1-7): B29C45/00; B29D17/00; B29L17/00; G11B7/24
Attorney, Agent or Firm:
Katsuo Ogawa (1 person outside)