US3930264A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Film cassette
Assignee: Fujifilm Holdings Corp
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Filing: 1974-04-03
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Granted: 1975-12-30
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Expires: 1994-04-03
Abstract
Abstract A film cassette is provided with a front protective board which may be slid into or out of the cassette through the monosheet exit. When inserted in the cassette, the protective board prevents entry of light through a front exposure opening formed in the cassette. When the protective board is removed from the cassette, exposed monosheets may be removed without hindrance from the cassette. If it is required to remove the cassette before exposure of all the monosheets provided therein, the protective board may be re-inserted into its original position in the cassette, and the cassette then unloaded, the remaining monosheets in the cassette being protected from exposure to light.
Inventors
- 👤 Yoshio Asano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:07
CPC Classifications
G; G03; G03D; G03D9/00; G03D9/02; G03B; G03B17/00; G03B17/26; G03B17/28; G03B17/32; G03B17/34; G03B17/48; G03B17/50; G03B17/52
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
157 words
A film cassette containing a plurality of film monosheets comprising a lightproof outer case, said case forming a front opening through wHich monosheets may be exposed, and an exit opening through which exposed monosheets may be removed, a spring means urging said monosheets toward said front opening, a protective lightproof board located in said cassette adjacent said front opening, a strip made of flexible lightproof material with a length equal to that of said exit opening and a width greater than that of said exit opening, one edge of which is attached to the interior of said case adjacent said exit opening and the free end of which covers said monosheet exit opening and is bent by pushing of said board to open said monosheet exit, whereby monosheets in said cassette may be protected from exposure to light through said front opening said lightproof board being removable from and insertable into said cassette through said monosheet exit.
Claim 2
Dependent Claim
157 words
A film cassette containing a plurality of film monosheets comprising a lightproof outer case, said case forming a front opening through wHich monosheets may be exposed, and an exit opening through which exposed monosheets may be removed, a spring means urging said monosheets toward said front opening, a protective lightproof board located in said cassette adjacent said front opening, a strip made of flexible lightproof material with a length equal to that of said exit opening and a width greater than that of said exit opening, one edge of which is attached to the interior of said case adjacent said exit opening and the free end of which covers said monosheet exit opening and is bent by pushing of said board to open said monosheet exit, whereby monosheets in said cassette may be protected from exposure to light through said front opening said lightproof board being removable from and insertable into said cassette through said monosheet exit.
Claim 3
Dependent Claim
56 words
A film cassette as defined in claim 1, wherein: said lightproof board has a projection portion adjacent one end thereof which contacts the free end portion of said flexible lightproof means upon insertion or removal of said board into or from said cassette, thereby moving said flexible lightproof means to close or open said monosheet exit.
Claim 4
Dependent Claim
132 words
A film cassette containing a plurality of film monosheets, comprising a lightproof outer case, an inner frame being contained within said outer case, said monosheets retained in said frame, said case and said frame each having a front opening through which said monosheets may be exposed and an exit through which exposed monosheets may be removed, a spring means urging said monosheets toward said front openings, flexible lightproof means attached to said inner frame adjacent said exit to close or open said exit, and a protective lightproof board, located in said cassette adjacent said front opening between said case and said frame, whereby said monosheets in said cassette may be protected from exposure to light through said opening, said lightproof board being insertable into and removable from said cassette through said exit.
Claim 5
Dependent Claim
132 words
A film cassette containing a plurality of film monosheets, comprising a lightproof outer case, an inner frame being contained within said outer case, said monosheets retained in said frame, said case and said frame each having a front opening through which said monosheets may be exposed and an exit through which exposed monosheets may be removed, a spring means urging said monosheets toward said front openings, flexible lightproof means attached to said inner frame adjacent said exit to close or open said exit, and a protective lightproof board, located in said cassette adjacent said front opening between said case and said frame, whereby said monosheets in said cassette may be protected from exposure to light through said opening, said lightproof board being insertable into and removable from said cassette through said exit.
Claim 6
Dependent Claim
78 words
A film cassette as defined in claim 3, wherein said flexible lightproof means comprises a strip of flexible light proof material with a length equal to that of said case opening and a width greater than that of said case opening, one edge of which is attached to the rear of said frame, and the free end of which covers said case monosheet exit and is bent by pushing of said board to open said case monosheet exit.
Claim 7
Dependent Claim
49 words
A film cassette as defined in claim 3, wherein said case and frame provide respectively an opening portion through which reversible drive means provided in a camera may contact the forward most monosheet or said board in said cassette to remove said monosheet or remove or re-insert said board.
Claim 8
Dependent Claim
71 words
A film cassette as defined in claim 3, wherein said frame further comprises forwardly projecting side wall portions which contact the rear of said case front wall, whereby said case and frame front walls are held apart, said lightproof board being located between said case and frame front walls and laterally between said frame forwardly projecting side wall portions, and said lightproof board is insertable into or removeable from said cassette.
Claim 9
Dependent Claim
47 words
A film cassette as defined in claim 3, wherein said case further comprises a pair of grooves formed in the inside of laterally opposite case side walls, in which sides of said inner frame are supported, said lightproof board being positioned between said case and said frame.
Claim 10
Dependent Claim
37 words
A film cassette as defined in claim 3, wherein an entrance is provided in the case of the end opposite the monosheet exit, to allow the re-insertion of said lightproof board between said case and said frame.
References Cited (Backward Citations)
US3595661A
Cited
US3748984A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-29 | 1979-06-30 | 1979-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-29 | 1983-06-30 | 1983-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-29 | 1987-06-30 | 1987-12-30 | $7700.00 | Window Closed / Lapsed |