GB1445130A - Method and apparatus for spreading on a running inert support a coating containing a ferromagnetic particulate material - Google Patents

Method and apparatus for spreading on a running inert support a coating containing a ferromagnetic particulate material

Info

Publication number
GB1445130A
GB1445130A GB4492073A GB4492073A GB1445130A GB 1445130 A GB1445130 A GB 1445130A GB 4492073 A GB4492073 A GB 4492073A GB 4492073 A GB4492073 A GB 4492073A GB 1445130 A GB1445130 A GB 1445130A
Authority
GB
United Kingdom
Prior art keywords
support
magnet
coating
coating liquid
deposited
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
GB4492073A
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.)
SECI
Original Assignee
SECI
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 SECI filed Critical SECI
Publication of GB1445130A publication Critical patent/GB1445130A/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
    • G11B5/84—Processes or apparatus specially adapted for manufacturing record carriers
    • G11B5/842—Coating a support with a liquid magnetic dispersion
    • G11B5/845—Coating a support with a liquid magnetic dispersion in a magnetic field

Landscapes

  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Manufacturing Of Magnetic Record Carriers (AREA)
  • Paints Or Removers (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

1445130 Coating apparatus SOC ELETTROTECNICA CHIMICA ITALIANA SpA 25 Sept 1973 [27 Sept 1972] 44920/73 Heading D1L A coating liquid containing ferromagnetic particles is deposited on a moving inert support in metered amounts by magnetic attraction of a magnet and the deposited coating evenly spread over the support by passing the latter through a magnetic field between the poles of a magnet in which the lines of flux are parallel to the direction of movement of the support. A single magnet e.g. a horseshoe magnet, may be used for both process steps. Apparatus for effecting the method is claimed and is illustrated with reference to Figures wherein a support 10 (Fig. I) runs past a gap 12 between the poles of a magnet 13. A doctor blade 15 rests along a generating line of a cylinder 14 spaced from the surface of the support and contains a coating liquid in the cavity 16. The coating liquid forms rings around the cylinder 14 and under the effect of the magnetic field, drops of coating are deposited on the support and then spread by the magnetic field. In Fig. 3 (not shown) a tub 20 also spaced from the support is used in place of cylinder and doctor blade, to contain the coating liquid.
GB4492073A 1972-09-27 1973-09-25 Method and apparatus for spreading on a running inert support a coating containing a ferromagnetic particulate material Expired GB1445130A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT2975072A IT967926B (en) 1972-09-27 1972-09-27 COATING OF SLIDING INERT SUPPORTS WITH PARTICULAR REFERENCE TO MAGNETIC TAPES AND EQUIPMENT TO MAKE IT

Publications (1)

Publication Number Publication Date
GB1445130A true GB1445130A (en) 1976-08-04

Family

ID=11228368

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4492073A Expired GB1445130A (en) 1972-09-27 1973-09-25 Method and apparatus for spreading on a running inert support a coating containing a ferromagnetic particulate material

Country Status (9)

Country Link
JP (1) JPS49125003A (en)
BE (1) BE805276A (en)
CH (1) CH578897A5 (en)
DE (1) DE2346390A1 (en)
ES (1) ES419030A1 (en)
FR (1) FR2200573B3 (en)
GB (1) GB1445130A (en)
IT (1) IT967926B (en)
NL (1) NL7313182A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2936035C2 (en) * 1979-09-06 1981-09-24 Agfa-Gevaert Ag, 5090 Leverkusen Process for applying magnetic, binder-containing dispersions to flexible substrates

Also Published As

Publication number Publication date
BE805276A (en) 1974-01-16
ES419030A1 (en) 1976-06-16
IT967926B (en) 1974-03-11
JPS49125003A (en) 1974-11-29
NL7313182A (en) 1974-03-29
CH578897A5 (en) 1976-08-31
FR2200573A1 (en) 1974-04-19
DE2346390A1 (en) 1974-03-28
FR2200573B3 (en) 1976-08-20

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees