JPS57105840A - Detection system for beginning end and termination of magnetic tape - Google Patents

Detection system for beginning end and termination of magnetic tape

Info

Publication number
JPS57105840A
JPS57105840A JP55182199A JP18219980A JPS57105840A JP S57105840 A JPS57105840 A JP S57105840A JP 55182199 A JP55182199 A JP 55182199A JP 18219980 A JP18219980 A JP 18219980A JP S57105840 A JPS57105840 A JP S57105840A
Authority
JP
Japan
Prior art keywords
magnetic tape
photosensitive part
tape
width
upper half
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
JP55182199A
Other languages
Japanese (ja)
Inventor
Motoyuki Kato
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 JP55182199A priority Critical patent/JPS57105840A/en
Publication of JPS57105840A publication Critical patent/JPS57105840A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
    • G11B15/02—Control of operating function, e.g. switching from recording to reproducing
    • G11B15/05—Control of operating function, e.g. switching from recording to reproducing by sensing features present on or derived from record carrier or container
    • G11B15/06—Control of operating function, e.g. switching from recording to reproducing by sensing features present on or derived from record carrier or container by sensing auxiliary features on record carriers or containers, e.g. to stop machine near the end of a tape
    • G11B15/08—Control of operating function, e.g. switching from recording to reproducing by sensing features present on or derived from record carrier or container by sensing auxiliary features on record carriers or containers, e.g. to stop machine near the end of a tape by photoelectric sensing

Abstract

PURPOSE:To detect failure in photosensitive part quickly, by means of a logical circuit, by adding an optical reflection index within a lower or upper half of a magnetic tape width at the tape end, adding it to almost all the tape width at the beginning end and detecting the index of lower or upper half. CONSTITUTION:At the beginning end of a magnetic tape 1, an optical reflection index BOT2 indicating the beginning end is attached. The BOT2 has a size over almost the full width of the magnetic tape. An optical reflecting index EOT3 indicating the end of tape is attached at the end of the magnetic tape 1, and the width is taken as upper half the tape width. A photosensitive part 5 detecting the lower half of the magnetic tape 1 and a photosensitive part 6 detecting the upper half are provided. The output of the photosensitive part 5, photosensitive part 6 and a signal line 17 indicating that the magnetic head is located before the BOT2, are operated at the logical circuit, and a failure signal of the parts 5, 6 is outputted at terminals 18, 19. Thus, the photosensitive part in failure can be detected completely when winding is made at the position of BOT.
JP55182199A 1980-12-22 1980-12-22 Detection system for beginning end and termination of magnetic tape Pending JPS57105840A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55182199A JPS57105840A (en) 1980-12-22 1980-12-22 Detection system for beginning end and termination of magnetic tape

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55182199A JPS57105840A (en) 1980-12-22 1980-12-22 Detection system for beginning end and termination of magnetic tape

Publications (1)

Publication Number Publication Date
JPS57105840A true JPS57105840A (en) 1982-07-01

Family

ID=16114077

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55182199A Pending JPS57105840A (en) 1980-12-22 1980-12-22 Detection system for beginning end and termination of magnetic tape

Country Status (1)

Country Link
JP (1) JPS57105840A (en)

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