US4514776A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic head and method of manufacturing the same
Assignee: Alps Alpine Co Ltd
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Filing: 1982-05-07
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Granted: 1985-04-30
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Expires: 2002-05-07
Abstract
Abstract A magnetic head characterized in that a nonmagnetic material of an erasing core chip in which two erasing cores are coupled by the nonmagnetic material is provided with a groove portion and that a recording/reproducing core is inserted in the groove portion. The magnetic head can be fabricated by a method characterized by comprising the step of providing first and second orthogonal grooves in a face plate, the step of providing the groove portion in the nonmagnetic material of the erasing core chip, the step of inserting the recording/reproducing core in the first groove, inserting the erasing core chip in the second groove and inserting the recording/reproducing core in the groove portion of the nonmagnetic material, and the step of fixing the face plate, the recording/reproducing core and the erasing core chip with glass or the like and polishing a front surface of the face plate.
Inventors
- 👤 Shoichi Koyama
- 👤 Tetsuya Iwata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:39
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/127; G11B5/265; G11B5/2651
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
66 words
A magnetic head having a recording/reproducing core and an erase core, said erase core being formed as a unitary chip element comprised of two erase core elements joined together by a nonmagnetic binding material, and means including a groove formed in said nonmagnetic binding material prior to assembly of said magnetic head and adapted to receive said recording/reproducing core for positioning it relative said erase core.
Claim 2
Dependent Claim
66 words
A magnetic head having a recording/reproducing core and an erase core, said erase core being formed as a unitary chip element comprised of two erase core elements joined together by a nonmagnetic binding material, and means including a groove formed in said nonmagnetic binding material prior to assembly of said magnetic head and adapted to receive said recording/reproducing core for positioning it relative said erase core.
Claim 3
Dependent Claim
39 words
A magnetic head according to claim 1, said recording/reproducing core having an end face adjacent the gap thereof, said end face being adapted to abut against said nonmagnetic binding material to position said recording/reproducing core relative said erase core.
Claim 4
Dependent Claim
24 words
A magnetic head according to claim 2, said recording/reproducing core having a step portion adjacent said gap and adapted to fit within said groove.
Claim 5
Dependent Claim
40 words
A magnetic head according to claim 1, said erase core being fitted within a grooved portion of a face plate and having means including protuberant portions extending laterally therefrom for engaging said grooved portion for aligning said erase core properly.
Claim 6
Dependent Claim
98 words
A mangetic head formed by a face plate made of nonmagnetic material and having first and second grooved portions extending orthogonally to one another, a recording/reproducing core fitted in one of said grooves, and an erasing core fitted within the other of said grooves, said erase core being formed as an unitary chip element comprised of two erase core elements joined together by nonmagnetic binding material, and means including a groove formed in said nonmagnetic binding material prior to assembly of said magnetic head and adapted to receive said recording/reproducing core for positioning it relative said erase core.
Claim 7
Dependent Claim
98 words
A mangetic head formed by a face plate made of nonmagnetic material and having first and second grooved portions extending orthogonally to one another, a recording/reproducing core fitted in one of said grooves, and an erasing core fitted within the other of said grooves, said erase core being formed as an unitary chip element comprised of two erase core elements joined together by nonmagnetic binding material, and means including a groove formed in said nonmagnetic binding material prior to assembly of said magnetic head and adapted to receive said recording/reproducing core for positioning it relative said erase core.
Claim 8
Dependent Claim
39 words
A magnetic head according to claim 5, said recording/reproducing core having an end face adjacent the gap thereof, said end face being adapted to abut against said nonmagnetic binding material to position said recording/reproducing core relative said erase core.
Claim 9
Dependent Claim
24 words
A magnetic head according to claim 6, said recording/reproducing core having a step portion adjacent said gap and adapted to fit within said grove.
Claim 10
Dependent Claim
33 words
A magnetic head according to claim 5, said erase core having means including protuberant portions extending laterally therefrom for engaging the grooved portion receiving said erase core for aligning said erase core properly.
Claim 11
Independent Claim
100 words
A method of forming a magnetic head including the steps of forming an erase core as a unitary chip element comprised of two erase core portions joined together by a nonmagnetic binding material having a groove formed therein; a recording/reproducing core, and thereafter fitting said erasing core and said recording/reproducing core in respective grooved portions of a face plate arranged orthognally to one another with the gap portion of said recording/reproducing core fitting within said groove to assure proper alignment, and thereafter securing said erase core and recording/reproducing core in position by fusing them in place with a nonmagnetic material.
Claim 12
Independent Claim
100 words
A method of forming a magnetic head including the steps of forming an erase core as a unitary chip element comprised of two erase core portions joined together by a nonmagnetic binding material having a groove formed therein; a recording/reproducing core, and thereafter fitting said erasing core and said recording/reproducing core in respective grooved portions of a face plate arranged orthognally to one another with the gap portion of said recording/reproducing core fitting within said groove to assure proper alignment, and thereafter securing said erase core and recording/reproducing core in position by fusing them in place with a nonmagnetic material.
Claim 13
Dependent Claim
28 words
A method according to claim 9, said face plate being divided along the groove receiving said recording/reproducing core so as to form two sections after said securing step.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-04-29 | 1988-10-29 | 1989-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-04-29 | 1992-10-29 | 1993-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-04-29 | 1996-10-29 | 1997-04-30 | $7700.00 | Window Closed / Lapsed |