US4546725A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for manufacturing magnetic recording media
Assignee: Fujifilm Holdings Corp
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Filing: 1984-03-08
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Granted: 1985-10-15
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Expires: 2004-03-08
Abstract
Abstract A magnetic recording medium manufacturing apparatus is comprised of a cooling rotary cylinder can and a small roller, arranged adjacent to each other. A flexible endless belt is laid over the can and roller and carries a tape-shaped support. A ferromagnetic material, evaporated from an evaporation source disposed below the can and roller, is vacuum-deposited onto the tape-shaped support.
Inventors
- 👤 Ryuji Shirahata
- 👤 Masaru Sekine
- 👤 Goro Akashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:40
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/22; C23C14/56; C23C14/562; G; G11; G11B; G11B5/00; G11B5/84; G11B5/85
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
132 words
A magnetic recording medium manufacturing apparatus for depositing a material onto a medium, said apparatus comprising: first and second rollers for transporting said medium; and evaporating means for evaporating said material for deposit onto said medium between said first and second rollers at an oblique angle with respect to the surface of said medium; said first roller being disposed closer to said evaporating means than said second roller, whereby said medium is transported past said evaporating means at an oblique angle; an endless belt support surrounding said first and second rollers, said medium being supported on said endless belt support between said first and second roller; and said first roller is smaller in diameter than said second roller and said second roller is a cooling rotary cylinder can for cooling said medium.
Claim 2
Dependent Claim
132 words
A magnetic recording medium manufacturing apparatus for depositing a material onto a medium, said apparatus comprising: first and second rollers for transporting said medium; and evaporating means for evaporating said material for deposit onto said medium between said first and second rollers at an oblique angle with respect to the surface of said medium; said first roller being disposed closer to said evaporating means than said second roller, whereby said medium is transported past said evaporating means at an oblique angle; an endless belt support surrounding said first and second rollers, said medium being supported on said endless belt support between said first and second roller; and said first roller is smaller in diameter than said second roller and said second roller is a cooling rotary cylinder can for cooling said medium.
Claim 3
Dependent Claim
12 words
An apparatus, as claimed in claim 1, wherein said medium is tape-shaped.
Claim 4
Dependent Claim
19 words
An apparatus, as claimed in claim 1, wherein said first and second rollers are arranged in a substantial vacuum.
Claim 5
Dependent Claim
19 words
An apparatus, as claimed in claim 1, wherein said evaporating means is disposed below said first and second rollers.
Claim 6
Dependent Claim
14 words
An apparatus, as claimed in claim 1, wherein said material is a ferromagnetic material.
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) | 1988-10-14 | 1989-04-15 | 1989-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-10-14 | 1993-04-15 | 1993-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-10-14 | 1997-04-15 | 1997-10-15 | $7700.00 | Window Closed / Lapsed |