Patent US3800311A successfully refreshed from Google Patents.
US3800311A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-developing sheet film magazine for use on a rollfilm camera
Assignee: Victor Hasselblad AB
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Filing: 1973-01-08
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Granted: 1974-03-26
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Expires: 1993-01-08
Abstract
Abstract A camera having a housing and lens means defining a focal plane normally cooperating with a film magazine for roll film is provided with a further magazine for sheet film adapted to be detachably secured to the housing in replacement of the roll film magazine. The sheet film in the further magazine is disposed in a film plane parallel to and rearward of the camera focal plane when the further magazine is secured to the housing; and a glass plate is mounted on the further magazine between the sheet film plane and the camera focal plane for effectively displacing the focal plane of the camera rearwardly substantially to the film plane of the sheet film in the further magazine.
Inventors
- 👤 K Olsson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 16:35
CPC Classifications
G; G03; G03B; G03B19/00; G03B19/02; G03B19/04; G03B19/08; G03B19/10
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
133 words
In a camera of the type comprising a housing, a lens, means defining a focal plane rearwardly of said lens, a rollfilm magazine, and means for detachably securing said rollfilm magazine to said housing so that rollfilm in such magazine may be positioned at said focal plane, the improvement comprising a further magazine containing sheet film and adapted to be detachably secured to said housing in replacement of said rollfilm magazine, the sheet film in said further magazine being disposed in a film plane parallel to and rearward of said camera focal plane when said further magazine is secured to said housing, and optical means carried by said further magazine for effectively displacing the focal plane of said camera rearwardly substantially to the film plane of said sheet film in said further magazine.
Claim 2
Dependent Claim
133 words
In a camera of the type comprising a housing, a lens, means defining a focal plane rearwardly of said lens, a rollfilm magazine, and means for detachably securing said rollfilm magazine to said housing so that rollfilm in such magazine may be positioned at said focal plane, the improvement comprising a further magazine containing sheet film and adapted to be detachably secured to said housing in replacement of said rollfilm magazine, the sheet film in said further magazine being disposed in a film plane parallel to and rearward of said camera focal plane when said further magazine is secured to said housing, and optical means carried by said further magazine for effectively displacing the focal plane of said camera rearwardly substantially to the film plane of said sheet film in said further magazine.
Claim 3
Dependent Claim
78 words
The structure of claim 1 wherein said camera housing includes a trigger rod projecting rearwardly of said housing and adapted to move rearwardly toward said sheet film when said further magazine is secured to said housing, the sheet film in said further magazine being disposed in a plane spaced rearward of said camera focal plane by a distance sufficient to permit free movement of said rod in a direction rearward of said housing without compressing said sheet film.
Claim 4
Dependent Claim
43 words
The structure of claim 2 wherein said optical means comprises a glass plate mounted on said further magazine between said film plane and said camera focal plane, said glass plate having a planar boundary surface which is disposed parallel to said film plane.
Claim 5
Dependent Claim
29 words
The structure of claim 3 wherein said glass plate comprises a pair of said planar boundary surfaces uniformly spaced from one another whereby said plate has a uniform thickness.
Claim 6
Dependent Claim
18 words
The structure of claim 4 wherein the sheet film in said further magazine is of the self-developing type.
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) | 1977-03-25 | 1977-09-24 | 1978-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-25 | 1981-09-24 | 1982-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-25 | 1985-09-24 | 1986-03-26 | $7700.00 | Window Closed / Lapsed |