GB1326979A - Method of and apparatus for producing magnetic recording tapes - Google Patents

Method of and apparatus for producing magnetic recording tapes

Info

Publication number
GB1326979A
GB1326979A GB4989671A GB4989671A GB1326979A GB 1326979 A GB1326979 A GB 1326979A GB 4989671 A GB4989671 A GB 4989671A GB 4989671 A GB4989671 A GB 4989671A GB 1326979 A GB1326979 A GB 1326979A
Authority
GB
United Kingdom
Prior art keywords
magnetic recording
producing magnetic
oct
recording tapes
head
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
GB4989671A
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.)
Agfa Gevaert AG
Original Assignee
Agfa Gevaert AG
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
Priority claimed from DE1907212A external-priority patent/DE1907212B2/en
Application filed by Agfa Gevaert AG filed Critical Agfa Gevaert AG
Publication of GB1326979A publication Critical patent/GB1326979A/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
    • G11B5/848—Coating a support with a magnetic layer by extrusion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/26—Processes for applying liquids or other fluent materials performed by applying the liquid or other fluent material from an outlet device in contact with, or almost in contact with, the surface
    • B05D1/265—Extrusion coatings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/20—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by magnetic fields
    • B05D3/203—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by magnetic fields pre-treatment by magnetic fields
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/07—Flat, e.g. panels
    • B29C48/08—Flat, e.g. panels flexible, e.g. films
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/911—Cooling
    • B29C48/9135—Cooling of flat articles, e.g. using specially adapted supporting means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/911—Cooling
    • B29C48/9135—Cooling of flat articles, e.g. using specially adapted supporting means
    • B29C48/9145—Endless cooling belts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/911—Cooling
    • B29C48/9135—Cooling of flat articles, e.g. using specially adapted supporting means
    • B29C48/915—Cooling of flat articles, e.g. using specially adapted supporting means with means for improving the adhesion to the supporting means
    • 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
    • G11B5/74—Record carriers characterised by the form, e.g. sheet shaped to wrap around a drum

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Coating Apparatus (AREA)
  • Manufacturing Of Magnetic Record Carriers (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

1326979 Coating webs AGFA-GEVAERT AG 27 Oct 1971 [29 Oct 1970] 49896/71 Addition to 1300645 Heading D1L The process and apparatus of the parent Specification are modified by providing at least one of the interior surfaces of the nozzle passage between inlet zone 33 and the extrusion slit 32 in the extrusion head 3 with a sawtooth like profile. The modification forms sections 34 and 35 in the head 3 of increased and decreased size and by thus producing a mixing movement in the dispersion 4a improves the uniformity of the magnetic coating layer on the support 5.
GB4989671A 1969-02-13 1971-10-27 Method of and apparatus for producing magnetic recording tapes Expired GB1326979A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1907212A DE1907212B2 (en) 1969-02-13 1969-02-13 Process for applying magnetizable binder-containing layers to a carrier film with an extruder caster
DE19702053194 DE2053194A1 (en) 1969-02-13 1970-10-29 Process for applying magnetizable, binder-containing layers to a carrier film

Publications (1)

Publication Number Publication Date
GB1326979A true GB1326979A (en) 1973-08-15

Family

ID=25756992

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4989671A Expired GB1326979A (en) 1969-02-13 1971-10-27 Method of and apparatus for producing magnetic recording tapes

Country Status (5)

Country Link
BE (1) BE774664R (en)
DE (1) DE2053194A1 (en)
FR (1) FR2111928B2 (en)
GB (1) GB1326979A (en)
NL (1) NL7114752A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115155979A (en) * 2022-09-07 2022-10-11 常州铭赛机器人科技股份有限公司 Screw valve with high magnetic glue discharging precision and glue discharging control method thereof

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4226139A1 (en) * 1992-08-07 1994-02-10 Basf Magnetics Gmbh Coating system for producing a magnetic recording tape - comprises a multi-slot extruder caster arranged to coat a moving film base with a magnetic multilayer which is exposed to a magnetic field
DE4234608C2 (en) * 1992-08-07 1997-08-07 Basf Magnetics Gmbh Process for producing a magnetic recording medium

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115155979A (en) * 2022-09-07 2022-10-11 常州铭赛机器人科技股份有限公司 Screw valve with high magnetic glue discharging precision and glue discharging control method thereof
CN115155979B (en) * 2022-09-07 2022-11-25 常州铭赛机器人科技股份有限公司 Screw valve with high magnetic glue discharging precision and glue discharging control method thereof

Also Published As

Publication number Publication date
NL7114752A (en) 1972-04-25
FR2111928A2 (en) 1972-06-09
DE2053194A1 (en) 1972-05-04
FR2111928B2 (en) 1976-02-13
BE774664R (en) 1972-05-02

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]