GB672154A - Improvements in or relating to magnetic sound recording - Google Patents

Improvements in or relating to magnetic sound recording

Info

Publication number
GB672154A
GB672154A GB16272/50A GB1627250A GB672154A GB 672154 A GB672154 A GB 672154A GB 16272/50 A GB16272/50 A GB 16272/50A GB 1627250 A GB1627250 A GB 1627250A GB 672154 A GB672154 A GB 672154A
Authority
GB
United Kingdom
Prior art keywords
magnetic
magnetic sound
sound recording
class
adhesive layer
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.)
Expired
Application number
GB16272/50A
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.)
Cellophane SA France
Original Assignee
Cellophane SA France
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 Cellophane SA France filed Critical Cellophane SA France
Publication of GB672154A publication Critical patent/GB672154A/en
Expired 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
    • G11B5/68—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent
    • G11B5/70—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer

Landscapes

  • Paints Or Removers (AREA)

Abstract

672,154. Magnetic sound records. CELLOPHANE SOC. ANON. June 29, 1950. [July 1, 1949] No. 16272/50. Class 40 (ii). [Also in Group NNYV] A magnetic sound recording tape comprises two thin film elements held together by an adhesive layer having dispersed therein fine particles of a magnetic material. The film elements may have a thickness of about 0.02 mm., but in a preferred embodiment one element mav be about 0.02 mm. thick and the other 0.01 mm. The adhesive layer is preferably gelatine 12 to 15 microns thick, in which magnetic iron oxide is produced in finely divided condition by a wet process. Specifications 13072/14 [Class 98 (ii)], , and 342,755, are referred to.
GB16272/50A 1949-07-01 1950-06-29 Improvements in or relating to magnetic sound recording Expired GB672154A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR672154X 1949-07-01

Publications (1)

Publication Number Publication Date
GB672154A true GB672154A (en) 1952-05-14

Family

ID=9017354

Family Applications (1)

Application Number Title Priority Date Filing Date
GB16272/50A Expired GB672154A (en) 1949-07-01 1950-06-29 Improvements in or relating to magnetic sound recording

Country Status (1)

Country Link
GB (1) GB672154A (en)

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