GB907638A - Improvements in or relating to a method of coating a carrier with a viscous medium and apparatus for effecting such coating - Google Patents

Improvements in or relating to a method of coating a carrier with a viscous medium and apparatus for effecting such coating

Info

Publication number
GB907638A
GB907638A GB1911658A GB1911658A GB907638A GB 907638 A GB907638 A GB 907638A GB 1911658 A GB1911658 A GB 1911658A GB 1911658 A GB1911658 A GB 1911658A GB 907638 A GB907638 A GB 907638A
Authority
GB
United Kingdom
Prior art keywords
coating
web
edge
slot
medium
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
GB1911658A
Inventor
William Soby
Kenneth Vincent Gray
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.)
EMI Ltd
Electrical and Musical Industries Ltd
Original Assignee
EMI Ltd
Electrical and Musical Industries 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 EMI Ltd, Electrical and Musical Industries Ltd filed Critical EMI Ltd
Priority to GB1911658A priority Critical patent/GB907638A/en
Priority to FR797109A priority patent/FR1226983A/en
Publication of GB907638A publication Critical patent/GB907638A/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
    • G11B5/127—Structure or manufacture of heads, e.g. inductive
    • G11B5/33—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only
    • G11B5/37—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only using galvano-magnetic devices, e.g. Hall-effect devices using Hall or Hall-related effect, e.g. planar-Hall effect or pseudo-Hall effect
    • G11B5/376—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only using galvano-magnetic devices, e.g. Hall-effect devices using Hall or Hall-related effect, e.g. planar-Hall effect or pseudo-Hall effect in semi-conductors
    • 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
    • G11B5/84—Processes or apparatus specially adapted for manufacturing record carriers
    • G11B5/842—Coating a support with a liquid magnetic dispersion

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

907,638. Coating webs. ELECTRICAL & MUSICAL INDUSTRIES Ltd. May 12, 1959 [June 14, 1958], No. 19116/58. Class 140. An apparatus for coating a web 3 with a viscous medium, e.g. including a magnetizable material, comprises means for effecting relative movement between the web and a supply of the medium to apply a coating to the web, a surface 5 contacting the coating, the surface 5 having an exit edge 6 extending across the coating and the dimensions of the surface 5 being such that the length of contact between the coating and the surface 5 in the direction of relative movement varies across the coating, e.g. the edge 6 may be concave, or convex, as shown. The medium, which may comprise gamma ferric oxide in a vinyl copolymer resin with a suitable solvent, is delivered from a trough 1 through slots 14, 15 on to the web 3, the edge 6 smoothing and spreading the coating as indicated by the dashed lines. One slot only may be employed, and other shapes than arcuate are suitable for the edge 6, e.g. V-shaped, and a straight edge 6 perpendicular to the direction of movement of the web 3 may be employed with a slot 14 or 15 so oriented or shaped to produce the required varying length of contact of the surface 5 and the coating. The forward edge of the slot may be arcuate in plan and the front wall of the slot may be arcuate in vertical section. Dimensions of the slot, surface 5, and spacing of the web 3 and surface 5 are given; the rate of passage of the web 3 is 45 feet per minute, the temperature of the medium 78‹ to 82‹ F. and its viscosity 2 poises.
GB1911658A 1958-06-14 1958-06-14 Improvements in or relating to a method of coating a carrier with a viscous medium and apparatus for effecting such coating Expired GB907638A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB1911658A GB907638A (en) 1958-06-14 1958-06-14 Improvements in or relating to a method of coating a carrier with a viscous medium and apparatus for effecting such coating
FR797109A FR1226983A (en) 1958-06-14 1959-06-10 Improvements to methods and devices for coating a support with a viscous product

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1911658A GB907638A (en) 1958-06-14 1958-06-14 Improvements in or relating to a method of coating a carrier with a viscous medium and apparatus for effecting such coating

Publications (1)

Publication Number Publication Date
GB907638A true GB907638A (en) 1962-10-10

Family

ID=10124022

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1911658A Expired GB907638A (en) 1958-06-14 1958-06-14 Improvements in or relating to a method of coating a carrier with a viscous medium and apparatus for effecting such coating

Country Status (2)

Country Link
FR (1) FR1226983A (en)
GB (1) GB907638A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4414916A (en) * 1981-05-20 1983-11-15 E. I. Du Pont De Nemours & Co. Automatic toning apparatus having a vertically reciprocating hopper
EP0125457A2 (en) * 1983-05-12 1984-11-21 International Business Machines Corporation Method and apparatus for coating magnetic recording media

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4414916A (en) * 1981-05-20 1983-11-15 E. I. Du Pont De Nemours & Co. Automatic toning apparatus having a vertically reciprocating hopper
EP0125457A2 (en) * 1983-05-12 1984-11-21 International Business Machines Corporation Method and apparatus for coating magnetic recording media
EP0125457A3 (en) * 1983-05-12 1986-01-02 International Business Machines Corporation Method and apparatus for coating magnetic recording media

Also Published As

Publication number Publication date
FR1226983A (en) 1960-08-18

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