US4376337A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing magnetic transducer head
Assignee: Sony Corp
•
Filing: 1981-09-28
•
Granted: 1983-03-15
•
Expires: 2001-09-28
Abstract
Abstract A multi-channel magnetic transducer head is formed by combining two core blocks with a magnetic gap therebetween. On the confronting surface of one of two core blocks, there is provided a plurality of parallel grooves. On the confronting surface of another core block, there is provided a gap defining a groove extending perpendicular to the parallel grooves. A plurality of first conductor strips are formed on the confronting surface of the one core and in the parallel grooves and the strips extend in the direction substantially perpendicular to the parallel grooves. Another surface of the one core opposite to the confronting surface is ground until the conductor strips are disposed on the surface and the cores are separated into a plurality of core elements. Second conductor strips are formed on the opposite surface to form coils around the core elements in co-operation with the first conductor strips.
Inventors
- 👤 Tomio Kobayasi
- 👤 Kouji Fukushi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:40
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/127; G11B5/29; G11B5/295; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49021; Y10T29/49032; Y10T29/49048; Y10T29/49052; Y10T29/4906; Y10T29/49064
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
225 words
A method of manufacturing a magnetic transducer head comprising the steps of; (a) preparing first and second magnetic cores, each having a first planar surface and a second planar surface opposite to said first surface; (b) forming first parallel grooves in one direction, leaving a predetermined width on said each first surface of said first and second cores; (c) forming a second groove extending perpendicular to said one direction on said first surface of at least one of said first and second cores; (d) forming a conductive line on said first surface and in said first parallel grooves of said first core extending along a direction substantially perpendicular to said one direction; (e) bonding said first and second cores to form an operating magnetic gap between said first surfaces of said first and second cores and place said conductive line to meet said second groove, and filling said first and second grooves with non-magnetic material; (f) removing a part of said first core from said second surface so as to dispose portions of said conductive line and to separate said conductive line in said first parallel grooves; and (g) forming second conductive material on said second surface of said first core to connect said portions of said first conductive line disposed on said second surface so as to form a coil around said first core.
Claim 2
Independent Claim
225 words
A method of manufacturing a magnetic transducer head comprising the steps of; (a) preparing first and second magnetic cores, each having a first planar surface and a second planar surface opposite to said first surface; (b) forming first parallel grooves in one direction, leaving a predetermined width on said each first surface of said first and second cores; (c) forming a second groove extending perpendicular to said one direction on said first surface of at least one of said first and second cores; (d) forming a conductive line on said first surface and in said first parallel grooves of said first core extending along a direction substantially perpendicular to said one direction; (e) bonding said first and second cores to form an operating magnetic gap between said first surfaces of said first and second cores and place said conductive line to meet said second groove, and filling said first and second grooves with non-magnetic material; (f) removing a part of said first core from said second surface so as to dispose portions of said conductive line and to separate said conductive line in said first parallel grooves; and (g) forming second conductive material on said second surface of said first core to connect said portions of said first conductive line disposed on said second surface so as to form a coil around said first core.
Claim 3
Dependent Claim
34 words
A method according to claim 1, further comprising a step of cutting the bonded block of said first and second cores substantially perpendicular to said gap at a position corresponding to said first grooves.
Claim 4
Dependent Claim
40 words
A method according to claim 1, further comprising a step of forming a plurality of slits on said second core from said second surface to said first parallel grooves to separate said second core into a plurality of core elements.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-03-14 | 1986-09-13 | 1987-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-03-14 | 1990-09-13 | 1991-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-03-14 | 1994-09-13 | 1995-03-15 | $7700.00 | Window Closed / Lapsed |