JPS554720A - Flexible magnetic disc device - Google Patents

Flexible magnetic disc device

Info

Publication number
JPS554720A
JPS554720A JP7603078A JP7603078A JPS554720A JP S554720 A JPS554720 A JP S554720A JP 7603078 A JP7603078 A JP 7603078A JP 7603078 A JP7603078 A JP 7603078A JP S554720 A JPS554720 A JP S554720A
Authority
JP
Japan
Prior art keywords
disc
edge face
discs
splitter
control
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.)
Pending
Application number
JP7603078A
Other languages
Japanese (ja)
Inventor
Eiichi Nanba
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co Ltd
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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP7603078A priority Critical patent/JPS554720A/en
Publication of JPS554720A publication Critical patent/JPS554720A/en
Pending legal-status Critical Current

Links

Landscapes

  • Automatic Disk Changers (AREA)

Abstract

PURPOSE: To make the access to a disc of a disc pack high-speed and sure by detecting the vibration of the edge face of a specific-optical characteristic reference flexible disc to control a splitter provided with a magnetic head.
CONSTITUTION: Reference discs 100-b, 100-c, etc., having edge faces different in edge face optical characteristic by coloring, exfoliation of the information recording layer, etc., are included in a disc pack formed by plural discs 100-a.... When the vibration of the edge face of these discs 100-b, 100-c, etc., is detected by optical system 11-a, movement detection circuit 11-b, etc., to control the movement of splitter 119 through control circuit 120, actuator 13 and track positioning actuator 14, splitter 119 rushes into a prescribed disc lamination body surely because every disc edge face forming the disc pack is vibrated uniformly, thus performing a rapid and sure access.
COPYRIGHT: (C)1980,JPO&Japio
JP7603078A 1978-06-22 1978-06-22 Flexible magnetic disc device Pending JPS554720A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7603078A JPS554720A (en) 1978-06-22 1978-06-22 Flexible magnetic disc device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7603078A JPS554720A (en) 1978-06-22 1978-06-22 Flexible magnetic disc device

Publications (1)

Publication Number Publication Date
JPS554720A true JPS554720A (en) 1980-01-14

Family

ID=13593414

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7603078A Pending JPS554720A (en) 1978-06-22 1978-06-22 Flexible magnetic disc device

Country Status (1)

Country Link
JP (1) JPS554720A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59112462A (en) * 1982-12-20 1984-06-28 Hitachi Ltd Page detecting mechanism of flexible magnetic disk device
US5282183A (en) * 1991-11-08 1994-01-25 Pioneer Electronic Corporation Position detecting apparatus and method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59112462A (en) * 1982-12-20 1984-06-28 Hitachi Ltd Page detecting mechanism of flexible magnetic disk device
JPS6321275B2 (en) * 1982-12-20 1988-05-06 Hitachi Ltd
US5282183A (en) * 1991-11-08 1994-01-25 Pioneer Electronic Corporation Position detecting apparatus and method

Similar Documents

Publication Publication Date Title
JPS56154720A (en) Film cassette
JPS5683841A (en) Base film for magnetic recording
JPS554720A (en) Flexible magnetic disc device
JPS5680863A (en) Magnetic tape position retrieval system
JPS523412A (en) Reprinting method of magnetic record
JPS5374408A (en) Tape recorder
JPS51149006A (en) High density magnetic recording tape sheet
JPS57113460A (en) Sheet recorder
JPS5317715A (en) Magnetic recorder/reproducer
JPS53106101A (en) Magnetic memory body
JPS5223916A (en) Disk playback system
SU540289A1 (en) Thermoplastic Recording Media
JPS5339025A (en) Writing control system for magnetic disc pack, etc.
JPS53109609A (en) Magnetic recorder
JPS5334414A (en) Recording system for video and sound information
SU657464A1 (en) Apparatus for recording information on magnetic disks
JPS5378818A (en) Magnetic disc system
JPS57151862A (en) Speed detecting device for moving body
JPS5431706A (en) Magnetic recorder-reproducer
JPS52119908A (en) Magnetic recording sheet
JPS5231708A (en) Regenerative device of magnetic record
JPS5349410A (en) System for protecting tape of magnetic tape device
JPS5641504A (en) Information reproducing-recording device
JPS53144710A (en) Magnatic cassette
JPS527229A (en) Recording method