Patent US2405995A successfully refreshed from Google Patents.
US4060313A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetically driven optical blade
Assignee: Fujifilm Holdings Corp
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Filing: 1976-03-09
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Granted: 1977-11-29
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Expires: 1996-03-09
Abstract
Abstract A thin permanent magnet sheet is sealed in a plastic blade. The magnet sheet is provided with perforations for binding the plastic material on one side of the magnet sheet with the plastic material on the other side thereof, thereby reinforcing the blade and facilitating the manufacture thereof. The magnet sheet is further provided on both sides thereof with projections of equal height to facilitate the molding of the plastic blade with the magnet sheet sealed therein at the middle of the thickness thereof.
Inventors
- 👤 Toshihiro Kondo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:38
CPC Classifications
G; G02; G02B; G02B26/00; G02B26/02; G02B26/04; G03; G03B; G03B9/00; G03B9/08; G03B9/36; G03B9/40
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
77 words
An optical blade which is electromagnetically driven comprising an opaque plastic sheet member and a permanent magnet sheet sealed therein, said permanent magnet sheet extending in parallel to the plastic sheet member at the middle of the thickness of said plastic sheet member, said permanent magnet sheet being provided with a number of perforations through which the plastic material on one side of the magnet sheet is bound with the plastic material on the other side thereof.
Claim 2
Dependent Claim
77 words
An optical blade which is electromagnetically driven comprising an opaque plastic sheet member and a permanent magnet sheet sealed therein, said permanent magnet sheet extending in parallel to the plastic sheet member at the middle of the thickness of said plastic sheet member, said permanent magnet sheet being provided with a number of perforations through which the plastic material on one side of the magnet sheet is bound with the plastic material on the other side thereof.
Claim 3
Dependent Claim
23 words
An optical blade as defined in claim 1 wherein said permanent magnet is provided on both sides thereof with projections of equal height.
Claim 4
Dependent Claim
22 words
An optical blade as defined in claim 1 wherein said plastic sheet member comprises a plastic material and black pigment mixed therewith.
Claim 5
Dependent Claim
15 words
An optical blade as defined in claim 3 wherein said plastic material is thermoplastic resin.
Claim 6
Dependent Claim
15 words
An optical blade as defined in claim 3 wherein said plastic material is thermosetting resin.
Claim 7
Dependent Claim
15 words
An optical blade as defined in claim 3 wherein said black pigment is carbon black.
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) | 1980-11-28 | 1981-05-30 | 1981-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-11-28 | 1985-05-30 | 1985-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-11-28 | 1989-05-30 | 1989-11-29 | $7700.00 | Window Closed / Lapsed |