US3765083A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a head using a tape gap
Assignee: W Bogen GmbH
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Filing: 1971-02-22
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Granted: 1973-10-16
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Expires: 1991-02-22
Abstract
Abstract A method for producing magnetic heads and magnetic heads whereby a non-magnetic rectilinear tape is stretched tautly in a slit of a non-magnetic base body also having recessed portions on both sides of the tape and channels for receiving the ends of a Ushaped magnetic core. The ends are placed in the channels and the recessed portions filled with soft magnetic material which thus magnetically connects the tape, which forms the gap, to the core ends. To form a multitrack head a base body having a plurality of successive pairs of channels and recessed portions adjacent the tape can be employed. If desired a shearing gap can also be provided in another location in the core.
Inventors
- 👤 E Seehawer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:38
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/127; G11B5/187; G11B5/23; G11B5/232; G11B5/1871; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49021; Y10T29/49032; Y10T29/49036; Y10T29/49041; Y10T29/49043; Y10T29/49055
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
151 words
A method for producing a magnetic head having a plurality of tracks and having a corresponding number of magnetic cores each with ends and a non-magnetic gap comprising the steps of: stretching a length of rectilinear non-magnetic tape at the desired location of said gap, placing said tape in a slit in a non-magnetic base body having a plurality of receiving channels for each receiving the ends of a core and a plurality of recessed portions each associated with one of said receiving channels for each magnetically connecting the ends of said core in the associated receiving channels, applying a soft magnetic material to said core so that said material abuts said tape and forms the pole tips of said core, including filling said soft magnetic material into each of said recessed portions so that said soft magnetic material magnetically connects said tape to said ends of each of said cores.
Claim 2
Independent Claim
151 words
A method for producing a magnetic head having a plurality of tracks and having a corresponding number of magnetic cores each with ends and a non-magnetic gap comprising the steps of: stretching a length of rectilinear non-magnetic tape at the desired location of said gap, placing said tape in a slit in a non-magnetic base body having a plurality of receiving channels for each receiving the ends of a core and a plurality of recessed portions each associated with one of said receiving channels for each magnetically connecting the ends of said core in the associated receiving channels, applying a soft magnetic material to said core so that said material abuts said tape and forms the pole tips of said core, including filling said soft magnetic material into each of said recessed portions so that said soft magnetic material magnetically connects said tape to said ends of each of said cores.
Claim 3
Dependent Claim
37 words
A method as in claim 1 wherein each said core has a rear part and including forming a shearing gap on the pole surfaces of the rear part of said core prior to said step of applying.
Claim 4
Dependent Claim
28 words
A method as in claim 1 including the further step of separating said cores linked by said tape to produce a head having the desired number of tracks.
References Cited (Backward Citations)
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US2941045A
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US3467789A
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US3564521A
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US3516152A
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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) | 1976-10-15 | 1977-04-16 | 1977-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-15 | 1981-04-16 | 1981-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-15 | 1985-04-16 | 1985-10-16 | $7700.00 | Window Closed / Lapsed |