Patent US4533049A successfully refreshed from Google Patents.
US4533049A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slide file sheet
Assignee: Slidex Corp
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Filing: 1984-03-06
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Granted: 1985-08-06
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Expires: 2004-03-06
Abstract
Abstract A slide file sheet includes a film holding plate having a plurality of rectangular recesses aligned with each other in rows and columns, frame supports for retaining frames of slide films in the respective rectangular recesses and protrusions provided at corners of the rectangular recesses of the plate to keep the slide films received in the recesses away from the bottoms of the recesses. According to the invention, the slide file sheet comprises a flexible cover attached at its one side edge to one side edge of the film holding plate to cover one surfaces and/or emulsion layer surfaces of slide films so as to securely protect them from dirt, fingerprints, scratches and the like, thereby facilitating handling the slide file sheet and always obtaining clear projected images of the films without any troublesome scraping operation.
Inventors
- 👤 Jiro Ozeki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:13
CPC Classifications
B; B42; B42F; B42F5/00; B42F5/06; G; G03; G03B; G03B21/00; G03B21/54; G03B21/64
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
80 words
A slide file sheet comprising: a film holding plate having a plurality of rectangular recesses aligned with each other in rows and columns, frame supports for retaining frames of slide film in said respective rectangular recesses, separating means for preventing said slide films from directly contacting respective bottoms of said rectangular recesses of the plate, and a flexible cover being at least partially transparent and attached at its one side edge to one side edge of said film holding plate.
Claim 2
Dependent Claim
80 words
A slide file sheet comprising: a film holding plate having a plurality of rectangular recesses aligned with each other in rows and columns, frame supports for retaining frames of slide film in said respective rectangular recesses, separating means for preventing said slide films from directly contacting respective bottoms of said rectangular recesses of the plate, and a flexible cover being at least partially transparent and attached at its one side edge to one side edge of said film holding plate.
Claim 3
Dependent Claim
44 words
A slide file sheet as set forth in claim 1, wherein said separating means includes protrusions provided at corners of said rectangular recesses of said plate to keep said frames of slide film located in the recesses away from said bottoms of the recesses.
Claim 4
Dependent Claim
37 words
A slide file sheet as set forth in claim 1, wherein said cover is attached to said one side edge of said film holding plate on a surface of the film holding plate defining said rectangular recesses.
Claim 5
Dependent Claim
53 words
A slide file sheet as set forth in claim 1, wherein the width of said cover is smaller than the width of the film holding plate so as to expose binding apertures formed in another side edge of said holding plate located opposite to the side edge to which the cover is attached.
Claim 6
Dependent Claim
15 words
A slide file sheet as set forth in claim 1, wherein said cover is transparent.
Claim 7
Dependent Claim
59 words
A slide file sheet as set forth in claim 5, wherein said cover is provided with opaque masking portions in the form of a grid so as to permit remaining portions other than the opaque masking portions to be transparent respectively at least corresponding to picture zones of the slide films received in said rectangular recesses of the plate.
Claim 8
Dependent Claim
23 words
A slide file sheet as set forth in claim 6, wherein said transparent areas respectively correspond to the rectangular recesses of the plate.
Claim 9
Dependent Claim
36 words
A slide file sheet as set forth in claim 1, wherein said film holding plate is formed with openings in bottoms of said rectangular recesses corresponding to picture zones of slide films received in said recesses.
Claim 10
Dependent Claim
41 words
A slide file sheet as set forth in claim 1, wherein said cover is attached to said one side edge of said film holding plate on a side opposite to a surface of the film holding plate defining said rectangular recesses.
Claim 11
Dependent Claim
68 words
A slide file sheet as set forth in claim 1, wherein said cover consists of two halves respectively substantially the same in size as said film holding plate and closely arranged side by side and the one half is transparent for covering the surface of the film holding plate opening the rectangular recesses and the other half is diffuse transmissible for covering the opposite surface of the plate.
Claim 12
Dependent Claim
47 words
A slide file sheet as set forth in claim 10, wherein said transparent and diffuse transmissible halves are formed with binding apertures at locations corresponding to binding apertures formed in one side edge of said film holding plate when the halves cover both surfaces of the plate.
Claim 13
Dependent Claim
48 words
A slide file sheet as set forth in claim 10, wherein to said one side edge of the film holding plate is attached one side edge of said one half whose side edge opposite to said attached side edge continues to one side edge of said other half.
Claim 14
Dependent Claim
48 words
A slide file sheet as set forth in claim 10, wherein to said one side edge of the film holding plate is attached one side edge of said one half whose side edge perpendicular to said attached side edge continues to one side edge of said other half.
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) | 1988-08-05 | 1989-02-04 | 1989-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-08-05 | 1993-02-04 | 1993-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-08-05 | 1997-02-04 | 1997-08-06 | $7700.00 | Window Closed / Lapsed |