FR2418521A1 - Magnetic tape cassette spool hubs - are moulded to give smooth case winding surface for tape using three inlet apertures and three circular blocks - Google Patents

Magnetic tape cassette spool hubs - are moulded to give smooth case winding surface for tape using three inlet apertures and three circular blocks

Info

Publication number
FR2418521A1
FR2418521A1 FR7805595A FR7805595A FR2418521A1 FR 2418521 A1 FR2418521 A1 FR 2418521A1 FR 7805595 A FR7805595 A FR 7805595A FR 7805595 A FR7805595 A FR 7805595A FR 2418521 A1 FR2418521 A1 FR 2418521A1
Authority
FR
France
Prior art keywords
winding surface
moulded
magnetic tape
inlet apertures
tape cassette
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.)
Granted
Application number
FR7805595A
Other languages
French (fr)
Other versions
FR2418521B1 (en
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.)
Maxell Holdings Ltd
Original Assignee
Hitachi Maxell 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 Hitachi Maxell Ltd filed Critical Hitachi Maxell Ltd
Priority to FR7805595A priority Critical patent/FR2418521A1/en
Publication of FR2418521A1 publication Critical patent/FR2418521A1/en
Application granted granted Critical
Publication of FR2418521B1 publication Critical patent/FR2418521B1/fr
Granted legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H75/00—Storing webs, tapes, or filamentary material, e.g. on reels
    • B65H75/50—Methods of making reels, bobbins, cop tubes, or the like by working an unspecified material, or several materials
    • 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/0025—Preventing defects on the moulded article, e.g. weld lines, shrinkage marks
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
    • G11B23/02—Containers; Storing means both adapted to cooperate with the recording or reproducing means
    • G11B23/037—Single reels or spools

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Storage Of Web-Like Or Filamentary Materials (AREA)

Abstract

A design for the hubs of magnetic tape cassette spools guarantees a smooth winding surface for the tape without the casting cracks and grooves present in many such spools. The mould has an inlet into which the nylon or plastic material is injected and the position of this is on one of the flat hub surfaces. Opposite this inlet is a roughly circular block (20) which affects the flow of the molten material so that a smooth winding surface without contraction cracks is produced. To balance the hub other similar blocks arranged symmetrically round it to give a total of three inlet apertures (20, 22, 23) in the final spool.
FR7805595A 1978-02-27 1978-02-27 Magnetic tape cassette spool hubs - are moulded to give smooth case winding surface for tape using three inlet apertures and three circular blocks Granted FR2418521A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7805595A FR2418521A1 (en) 1978-02-27 1978-02-27 Magnetic tape cassette spool hubs - are moulded to give smooth case winding surface for tape using three inlet apertures and three circular blocks

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7805595A FR2418521A1 (en) 1978-02-27 1978-02-27 Magnetic tape cassette spool hubs - are moulded to give smooth case winding surface for tape using three inlet apertures and three circular blocks

Publications (2)

Publication Number Publication Date
FR2418521A1 true FR2418521A1 (en) 1979-09-21
FR2418521B1 FR2418521B1 (en) 1980-10-17

Family

ID=9205115

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7805595A Granted FR2418521A1 (en) 1978-02-27 1978-02-27 Magnetic tape cassette spool hubs - are moulded to give smooth case winding surface for tape using three inlet apertures and three circular blocks

Country Status (1)

Country Link
FR (1) FR2418521A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0247821A2 (en) * 1986-05-26 1987-12-02 Polyplastics Co. Ltd. Method of manufacturing tape reel
EP0247822A2 (en) * 1986-05-26 1987-12-02 Polyplastics Co. Ltd. Method of manufacturing tape reel

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3333300A (en) * 1966-07-01 1967-08-01 Fredric Wise Mold structure for plastic articles having a cylindrical outer surface
NL6701653A (en) * 1967-02-03 1968-08-05
US3661345A (en) * 1968-05-15 1972-05-09 Theodore Ritz Jr Hub to hub tape cartridge
US3686470A (en) * 1970-11-27 1972-08-22 Ibm Two shell magnetic tape cartridge
US3880978A (en) * 1974-04-23 1975-04-29 Ford Motor Co Method for forming a remote annular rim of plastic material

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3333300A (en) * 1966-07-01 1967-08-01 Fredric Wise Mold structure for plastic articles having a cylindrical outer surface
NL6701653A (en) * 1967-02-03 1968-08-05
US3661345A (en) * 1968-05-15 1972-05-09 Theodore Ritz Jr Hub to hub tape cartridge
US3686470A (en) * 1970-11-27 1972-08-22 Ibm Two shell magnetic tape cartridge
US3880978A (en) * 1974-04-23 1975-04-29 Ford Motor Co Method for forming a remote annular rim of plastic material

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0247821A2 (en) * 1986-05-26 1987-12-02 Polyplastics Co. Ltd. Method of manufacturing tape reel
EP0247822A2 (en) * 1986-05-26 1987-12-02 Polyplastics Co. Ltd. Method of manufacturing tape reel
EP0247822A3 (en) * 1986-05-26 1989-05-17 Polyplastics Co. Ltd. Method of manufacturing tape reel
EP0247821A3 (en) * 1986-05-26 1989-05-24 Polyplastics Co. Ltd. Method of manufacturing tape reel

Also Published As

Publication number Publication date
FR2418521B1 (en) 1980-10-17

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Legal Events

Date Code Title Description
ST Notification of lapse