JPS5558830A - Base for video tape - Google Patents

Base for video tape

Info

Publication number
JPS5558830A
JPS5558830A JP13062178A JP13062178A JPS5558830A JP S5558830 A JPS5558830 A JP S5558830A JP 13062178 A JP13062178 A JP 13062178A JP 13062178 A JP13062178 A JP 13062178A JP S5558830 A JPS5558830 A JP S5558830A
Authority
JP
Japan
Prior art keywords
base
video tape
constitution
longitudinal
difference
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
JP13062178A
Other languages
Japanese (ja)
Inventor
Yoneo Arai
Yoshio Kawakami
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.)
TDK Corp
Original Assignee
TDK Corp
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 TDK Corp filed Critical TDK Corp
Priority to JP13062178A priority Critical patent/JPS5558830A/en
Priority to GB7936079A priority patent/GB2035134A/en
Priority to NL7907721A priority patent/NL7907721A/en
Priority to DE19792942507 priority patent/DE2942507A1/en
Publication of JPS5558830A publication Critical patent/JPS5558830A/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
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/62—Record carriers characterised by the selection of the material
    • G11B5/73—Base layers, i.e. all non-magnetic layers lying under a lowermost magnetic recording layer, e.g. including any non-magnetic layer in between a first magnetic recording layer and either an underlying substrate or a soft magnetic underlayer
    • G11B5/739—Magnetic recording media substrates
    • G11B5/73923—Organic polymer substrates
    • G11B5/73927—Polyester substrates, e.g. polyethylene terephthalate

Abstract

PURPOSE: To form the video tape less in skew amount, by using the base having specific optical characteristics.
CONSTITUTION: As the base for video tape, the difference of refractive ratio (Δn) between longitudinal and transversal directions of the base is used within +10× 10-3.
COPYRIGHT: (C)1980,JPO&Japio
JP13062178A 1978-10-24 1978-10-24 Base for video tape Pending JPS5558830A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP13062178A JPS5558830A (en) 1978-10-24 1978-10-24 Base for video tape
GB7936079A GB2035134A (en) 1978-10-24 1979-10-17 Magnetic recording tape
NL7907721A NL7907721A (en) 1978-10-24 1979-10-19 MAGNETIC REGISTRATION BAND.
DE19792942507 DE2942507A1 (en) 1978-10-24 1979-10-20 MAGNETIC TAPE, ESPECIALLY FOR VIDEO RECORDER

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13062178A JPS5558830A (en) 1978-10-24 1978-10-24 Base for video tape

Publications (1)

Publication Number Publication Date
JPS5558830A true JPS5558830A (en) 1980-05-01

Family

ID=15038599

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13062178A Pending JPS5558830A (en) 1978-10-24 1978-10-24 Base for video tape

Country Status (4)

Country Link
JP (1) JPS5558830A (en)
DE (1) DE2942507A1 (en)
GB (1) GB2035134A (en)
NL (1) NL7907721A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0061769B1 (en) * 1981-03-30 1987-04-01 Teijin Limited Magnetic recording medium
JPS5984341A (en) * 1982-11-08 1984-05-16 Tdk Corp Magnetic recording medium
JP2519066B2 (en) * 1987-08-31 1996-07-31 富士写真フイルム株式会社 Magnetic recording media
US10861487B2 (en) * 2017-06-05 2020-12-08 Maxell Holdings, Ltd. High recording density magnetic recording medium and recording/reproduction mechanism for the same

Also Published As

Publication number Publication date
DE2942507A1 (en) 1980-05-08
GB2035134A (en) 1980-06-18
NL7907721A (en) 1980-04-28

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