Title:
【発明の名称】情報記録ディスク用スタンパ判別方法
Document Type and Number:
Japanese Patent JP2523853
Kind Code:
B2
Abstract:
There is disclosed a method of identifying a stamper for an optical information storage disk in order to distinguish first and second stampers from each other, the second stamper being replicated from the first stamper, each of the first and second stampers carrying recorded information signals and a printed code pattern recorded circumferentially and representing stamper identifying information from each other. The printed code pattern is read in a predetermined direction, and it is determined whether a start or stop signal of the printed code pattern is read first. The first and the second stampers are distinguished from each other in dependence on whether the start or stop signal is read first.
Inventors:
KUMASAKA OSAMU
Application Number:
JP3774489A
Publication Date:
August 14, 1996
Filing Date:
February 17, 1989
Export Citation:
Assignee:
PAIONIA KK
PAIONIA BIDEO KK
PAIONIA BIDEO KK
International Classes:
B29D17/00; G11B7/26; (IPC1-7): G11B7/26
Attorney, Agent or Firm:
Fujihiko Motohiko