Cross type magnetic head
Abstract
Abstract A CROSS TYPE MAGNETIC HEAD OF THE PRESENT INVENTION INCLUDES A MAGNETIC RECORD OR RECORD-REPRODUCE HEAD CORE AND AN ERASE HEAD CORE. THE MAGNETIC RECORD OR RECORD-REPRODUCE HEAD CORE CONSISTS OF A PAIR OF MAGNETIC RECORD OR RECORDREPRODUCING HEAD CORE MEMBERS FIXED TO EACH OTHER IN SIDE-TOSIDE ABUTTING RELATIONSHIP SO AS TO FORM A FRONT GAP. THE ERASE HEAD CORE CONSISTS OF A PAIR OF ERASE HEAD CORE MAMBERS OF HIGH MAGNETIC RESISTANCE AND HIGH MAGNETIC PERMEABILITY DISPOSED SO AS TO CROSS THE MAGNETIC RECORD OR RECORDREPRODUCE HEAD CORE IN THE VICINITY OF THE FRONT GAP, THUS, ERASED TRACKS CAN BE FORMED ALONG THE OPPOSITE SIDE EDGES OF A MAGNETIZED RECORDED TRACK PROVIDED BY THE MAGNETIC RECORD OR RECORD-REPRODUCE HEAD CORE. D R A W I N G
Inventors
- 👤 T Hasegawa
Bibliographic Details
Claims Analysis
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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) | 1977-05-06 | 1977-11-05 | 1978-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-06 | 1981-11-05 | 1982-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-06 | 1985-11-05 | 1986-05-07 | $7700.00 | Window Closed / Lapsed |