Patent EP0106321A2 successfully refreshed from Google Patents.
EP0106321A2
Expired / Lapsed
EP
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Amorphous magnetic head and a method of manufacturing the same
Assignee: Sanyo Electric Co Ltd
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Filing: 1983-10-13
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Granted: —
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Expires: 2003-10-13
Abstract
Abstract This disclosure is directed to an amorphous magnetic head which includes a main core having core halves each formed from non-laminated thin sheets of amorphous magnetic material, a non-magnetic spacer, with the core halves being abutted against each other through the non-magnetic spacer disposed in a front gap which is provided between the core halves and whose lower edge is defined by a coil winding opening formed in the core halves, and a set of reinforcing members applied onto opposite sides of the main core to hold the core halves between them. Resinous material is infiltered between the respective reinforcing members and the core halves for integration of the respective elements into one unit. The disclosure also relates to a method of manufacturing such an amorphous magnetic head on a large scale in an efficient manner.
Inventors
- 👤 Kotaro Matsuura
- 👤 Kenji Oyamada
- 👤 Michio Kumakiri
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 06:18
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/127; G11B5/147; G11B5/1475; G11B5/10
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
113 words
An amorphous magnetic head which comprises a main core (c) including core halves (11) each formed from non-laminated thin sheets of amorphous magnetic material, a non-magnetic spacer (17), said core halves (11) being abutted against each other through said non-magnetic spacer (17) disposed in a front gap which is provided between said core halves and whose lower edge is defined by a coil winding opening (g) formed in said main core (c), and a set of reinforcing members (18) applied onto opposite sides of said main core (c) to hold said core halves (11) therebetween, said reinforcing members (18) and said core halves (11) being combined into one unit through a combining means.
Claim 2
Dependent Claim
113 words
An amorphous magnetic head which comprises a main core (c) including core halves (11) each formed from non-laminated thin sheets of amorphous magnetic material, a non-magnetic spacer (17), said core halves (11) being abutted against each other through said non-magnetic spacer (17) disposed in a front gap which is provided between said core halves and whose lower edge is defined by a coil winding opening (g) formed in said main core (c), and a set of reinforcing members (18) applied onto opposite sides of said main core (c) to hold said core halves (11) therebetween, said reinforcing members (18) and said core halves (11) being combined into one unit through a combining means.
Claim 3
Dependent Claim
32 words
-An amorphous magnetic head as claimed in Claim 1, wherein said combining means includes a resinous material (b) filled between said reinforcing members (18) and said core halves (11) for bonding therebetween.
Claim 4
Dependent Claim
33 words
An amorphous magnetic head as claimed in Claim 2, wherein said resinous material (b) is epoxy resin having a curing temperature lower than Curie temperature and crystallization temperature of said amorphous magnetic material.
Claim 5
Dependent Claim
31 words
An amorphous magnetic head as claimed in Claim 1, wherein said reinforcing members (18) are made of a metallic material, with coil winding region thereof being formed by a non-metallic material.
Claim 6
Dependent Claim
51 words
5 . An amorphous magnetic head as claimed in Claim 1, wherein said reinforcing members (18) are made of a glass material, and said combining means includes means for partially fusing said core halves (11) at predetermined welding spots (w) so as to be bonded to said reinforcing members (18) thereat.
Claim 7
Dependent Claim
27 words
An amorphous magnetic head as claimed in Claim 5, wherein said partially fusing means includes laser beams for effecting spot welding at said predetermined welding spots (w).
Claim 8
Dependent Claim
28 words
An amorphous magnetic head as claimed in Claim 6, wherein said predetermined welding spots (w) are provided one at each of four corners of the amorphous magnetic head.
Claim 9
Independent Claim
155 words
A method of manufacturing an amorphous magnetic head, which comprises the steps of constituting a set of core halves (11) having a coil winding opening (g) which defines a lower edge of a front gap at least in one of abutted faces thereof through processing of thin sheets of amorphous magnetic material without lamination thereof, arranging said core halves (11) to be abutted against each other through a non-magnetic spacer (17) disposed at the front gap between said core halves (11), holding the core halves (11) thus abutted against each other between a set of reinforcing members (18), and filling resinous material through penetration between the core halves (11) and the reinforcing members (18) under a state where both of said core halves (11) are depressed from vertical and lateral directions by a depressing means, thereby to integrate said core halves (11) and said reinforcing members (18) into one unit, with a head gap formed.
Claim 10
Independent Claim
155 words
A method of manufacturing an amorphous magnetic head, which comprises the steps of constituting a set of core halves (11) having a coil winding opening (g) which defines a lower edge of a front gap at least in one of abutted faces thereof through processing of thin sheets of amorphous magnetic material without lamination thereof, arranging said core halves (11) to be abutted against each other through a non-magnetic spacer (17) disposed at the front gap between said core halves (11), holding the core halves (11) thus abutted against each other between a set of reinforcing members (18), and filling resinous material through penetration between the core halves (11) and the reinforcing members (18) under a state where both of said core halves (11) are depressed from vertical and lateral directions by a depressing means, thereby to integrate said core halves (11) and said reinforcing members (18) into one unit, with a head gap formed.
Claim 11
Dependent Claim
50 words
A method as claimed in Claim 8, wherein said depressing means is a frame (S, SB, SC) fitted around an assembly including the core halves (11) and the reinforcing members (18) for effecting the abutting of the core halves (11) against each other for the formation of the head gap.
Claim 12
Dependent Claim
25 words
A method as claimed in Claim 9, wherein said frame (S, SB, SC) is provided with projection means (p) for depressing said core halves (11).
Claim 13
Dependent Claim
37 words
A method as claimed in Claim 9, wherein said frame (S, SB, SC) is made of a resilient material having a spring force so as to depress the core halves (11) by a resilient restoring force thereof.
Claim 14
Independent Claim
190 words
A method of manufacturing an amorphous magnetic head, which comprises the steps of forming from an amorphous magnetic thin sheet, a first series (11A) of core halves (11) in which a plurality of core halves (11) each having a coil winding opening (g) are arranged in one row through connecting portions (llc) provided therebetween, abutting said first series (11A) of core halves (11) against a second series (11B) of core halves (11) similarly made of the amorphous magnetic thin sheet to constitute corresponding other core halves (11), through non-magnetic spacer means (17) provided between front gap forming faces (llg) of said first and second series (11A) and (11B) of core halves (11), integrating said first and second series (11A) and (11B) of core halves (11) into one unit by welding said connecting portions (11c) with portions of said second series (11B) of core halves (11) confronting said connecting portions, and joining reinforcing members (18') which bridge confronting pairs of core halves (11) of said first and second series (11A) and (11B) of core halves (11), with said confronting pairs of core halves for subsequent removal of said connecting portions (llc).
Claim 15
Independent Claim
190 words
A method of manufacturing an amorphous magnetic head, which comprises the steps of forming from an amorphous magnetic thin sheet, a first series (11A) of core halves (11) in which a plurality of core halves (11) each having a coil winding opening (g) are arranged in one row through connecting portions (llc) provided therebetween, abutting said first series (11A) of core halves (11) against a second series (11B) of core halves (11) similarly made of the amorphous magnetic thin sheet to constitute corresponding other core halves (11), through non-magnetic spacer means (17) provided between front gap forming faces (llg) of said first and second series (11A) and (11B) of core halves (11), integrating said first and second series (11A) and (11B) of core halves (11) into one unit by welding said connecting portions (11c) with portions of said second series (11B) of core halves (11) confronting said connecting portions, and joining reinforcing members (18') which bridge confronting pairs of core halves (11) of said first and second series (11A) and (11B) of core halves (11), with said confronting pairs of core halves for subsequent removal of said connecting portions (llc).
References Cited (Backward Citations)
No citation records indexed.
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