DE3733639A1 - Schreibschutz fuer die huelle eines flachen datentraegers - Google Patents

Schreibschutz fuer die huelle eines flachen datentraegers

Info

Publication number
DE3733639A1
DE3733639A1 DE19873733639 DE3733639A DE3733639A1 DE 3733639 A1 DE3733639 A1 DE 3733639A1 DE 19873733639 DE19873733639 DE 19873733639 DE 3733639 A DE3733639 A DE 3733639A DE 3733639 A1 DE3733639 A1 DE 3733639A1
Authority
DE
Germany
Prior art keywords
write protection
edges
recess
protective
data carrier
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
DE19873733639
Other languages
German (de)
English (en)
Other versions
DE3733639C2 (enExample
Inventor
Norbert Kunze
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to DE19873733639 priority Critical patent/DE3733639A1/de
Publication of DE3733639A1 publication Critical patent/DE3733639A1/de
Application granted granted Critical
Publication of DE3733639C2 publication Critical patent/DE3733639C2/de
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
    • G11B23/28—Indicating or preventing prior or unauthorised use, e.g. cassettes with sealing or locking means, write-protect devices for discs
    • G11B23/288—Protecting disks from being written or overwritten
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
    • G11B23/02—Containers; Storing means both adapted to cooperate with the recording or reproducing means
    • G11B23/03—Containers for flat record carriers
    • G11B23/0301—Details
    • G11B23/0302—Auxiliary features

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Packaging For Recording Disks (AREA)
  • Storage Device Security (AREA)
DE19873733639 1987-10-05 1987-10-05 Schreibschutz fuer die huelle eines flachen datentraegers Granted DE3733639A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19873733639 DE3733639A1 (de) 1987-10-05 1987-10-05 Schreibschutz fuer die huelle eines flachen datentraegers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19873733639 DE3733639A1 (de) 1987-10-05 1987-10-05 Schreibschutz fuer die huelle eines flachen datentraegers

Publications (2)

Publication Number Publication Date
DE3733639A1 true DE3733639A1 (de) 1989-04-20
DE3733639C2 DE3733639C2 (enExample) 1989-10-12

Family

ID=6337658

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19873733639 Granted DE3733639A1 (de) 1987-10-05 1987-10-05 Schreibschutz fuer die huelle eines flachen datentraegers

Country Status (1)

Country Link
DE (1) DE3733639A1 (enExample)

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
IBM TDB, Vol. 26, Nr. 8, Januar 1984, S. 4113, 4114 *

Also Published As

Publication number Publication date
DE3733639C2 (enExample) 1989-10-12

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Legal Events

Date Code Title Description
OP8 Request for examination as to paragraph 44 patent law
D2 Grant after examination
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee