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Patent US4780734A successfully refreshed from Google Patents.
US4780734A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Camera
Assignee: Canon Inc
•
Filing: 1988-01-04
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Granted: 1988-10-25
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Expires: 2008-01-04
Abstract
Abstract A camera is arranged such that when a film housed in a film cartridge is loaded into a film cartridge chamber of the camera with a leader portion of the film remaining outside the camera and upon closure of the film cartridge chamber, the leader portion of the film is retracted into the camera and the film is wound onto a film winding spool. This camera comprises a retracted-amount measuring system for measuring the retracted-amount of film when the leader portion thereof is retracted into the camera and a wound-amount detector responsive to an output of the retracted-amount measuring system to determine the amount of the film wound onto the film winding spool.
Inventors
- 👤 Yukio Ogawa
- 👤 Toyotoshi Suzuki
- 👤 Kiyoshi Alyfuku
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 02:02
CPC Classifications
G; G03; G03B; G03B17/00; G03B17/42; G03B17/425
Claims Analysis
Total Claims: 34
Claim 1
Independent Claim
123 words
A camera of the type in which when a film housed in a film cartridge is loaded into a film cartridge chamber of the camera and a closure of said film cartridge chamber is closed in such state that a leader portion of the film remains outside the camera, said leader portion of the film is retracted into the camera and then the film is wound onto a film winding spool, comprising: (A) retracted-amount measuring means for measuring a retracted amount of the film when the leader portion of the film is retracted into the camera; and (B) winding-amount deciding means responsive to an output of said retracted-amount measuring means to decide an amount of the film wound onto the film winding spool.
Claim 2
Dependent Claim
123 words
A camera of the type in which when a film housed in a film cartridge is loaded into a film cartridge chamber of the camera and a closure of said film cartridge chamber is closed in such state that a leader portion of the film remains outside the camera, said leader portion of the film is retracted into the camera and then the film is wound onto a film winding spool, comprising: (A) retracted-amount measuring means for measuring a retracted amount of the film when the leader portion of the film is retracted into the camera; and (B) winding-amount deciding means responsive to an output of said retracted-amount measuring means to decide an amount of the film wound onto the film winding spool.
Claim 3
Dependent Claim
26 words
A camera according to claim 1, in which said retracted-amount measuring means includes means for detecting an amount of movement of perforations formed in the film.
Claim 4
Dependent Claim
41 words
A camera according to claim 1, in which said winding-amount deciding means includes means for winding a sufficient amount of the film to prevent an already exposed portion of the film from being used as a photographing portion of the film.
Claim 5
Dependent Claim
41 words
A camera according to claim 1, in which said winding-amount deciding means includes means for feeding larger amount of the film to said film winding spool than the retracted amount of the leader portion of the film retracted into the camera.
Claim 6
Dependent Claim
27 words
A camera according to claim 1, in which said winding-amount deciding means includes detecting means for detecting an amount of movement of perforations formed in the film.
Claim 7
Dependent Claim
44 words
A camera according to claim 5, in which said detecting means includes a sprocket arranged to engage with the perforations and to detect the amount of movement of said perforations, said sprocket being movable into or out of a moving path of the film.
Claim 8
Dependent Claim
29 words
A camera according to claim 6, in which said detecting means includes energizing means for energizing said sprocket to move said sprocket into the moving path of the film.
Claim 9
Dependent Claim
108 words
A camera wherein a film cartridge substantially containing a film is loaded into the camera such that a portion of film extending outside of the film cartridge initially remains outside of the camera, and after the film remaining outside of the film cartridge is retracted into the camera, the film is fed to a film take-up spool, comprising: (A) a retracted amount measuring means for measuring the amount of the film retracted into the camera; and (B) a feeding amount determining means for determining the amount of the film to be fed to the film take-up spool in response to an output of said retracted amount measuring means.
Claim 10
Dependent Claim
108 words
A camera wherein a film cartridge substantially containing a film is loaded into the camera such that a portion of film extending outside of the film cartridge initially remains outside of the camera, and after the film remaining outside of the film cartridge is retracted into the camera, the film is fed to a film take-up spool, comprising: (A) a retracted amount measuring means for measuring the amount of the film retracted into the camera; and (B) a feeding amount determining means for determining the amount of the film to be fed to the film take-up spool in response to an output of said retracted amount measuring means.
Claim 11
Dependent Claim
34 words
A camera according to claim 8, wherein the film has perforations formed therein, and said retracted amount measuring means includes detecting means for detecting an amount of movement of the perforations in the film.
Claim 12
Dependent Claim
37 words
A camera according to claim 8, wherein said feeding amount determining means includes means for feeding such an amount of the film that at least an already exposed portion of the film is not used for photography.
Claim 13
Dependent Claim
34 words
A camera according to claim 8, wherein said feeding amount determining means includes means for feeding to the take-up spool a larger amount of film than the amount of film retracted into the camera.
Claim 14
Dependent Claim
34 words
A camera according to claim 8, wherein the film has perforations formed therein, and said feeding amount determining means includes detecting means for detecting an amount of movement of the perforations in the film.
Claim 15
Dependent Claim
45 words
A camera according to claim 12, in which said detecting means includes a sprocket arranged to engage with the perforations and to detect an amount of movement of said perforations, said sprocket being movable into and out of a path of movement of the film.
Claim 16
Dependent Claim
30 words
A camera according to claim 13, in which said detecting means includes energizing means for energizing said sprocket to move said sprocket into a path of movement of the film.
Claim 17
Dependent Claim
44 words
A camera according to claim 8, wherein said feeding amount determining means includes detecting means for detecting an amount of the movement of the film, said detecting means being capable of being brought into and out of the path of movement of the film.
Claim 18
Dependent Claim
79 words
A camera according to claim 8, further comprising (a) an electrically conductive contact plate disposed in a back of the camera, and (b) first and second conductive members disposed in the back of the camera rearwardly of the path of movement of the film, whereby said first and second conductive members become electrically connected upon contact with said contact plate and electrically disconnected by interposition of the film between the contact plate and the first and second conductive members.
Claim 19
Dependent Claim
18 words
A camera according to claim 8, further comprising a holding means for holding rollers for moving the film.
Claim 20
Dependent Claim
37 words
A camera according to claim 8, further comprising a camera body member and a film pressing member arranged at an aperture portion of said camera body member, said pressing member being fixed to said camera body member.
Claim 21
Dependent Claim
20 words
A camera according to claim 18, further comprising position adjusting means for adjusting the position of said film pressing member.
Claim 22
Dependent Claim
112 words
A camera wherein a film cartridge substantially containing a film is loaded into the camera such that a portion of film extending outside of the film cartridge initially remains outside of the camera, and after the film remaining outside of the film cartridge is retraced into the camera, the film is fed to a film take-up spool, comprising: (A) a retracted amount measuring means for measuring the amount of the film retracted into the film cartridge; and (B) a feeding amount determining means for determining the amount of the film to be fed to the side of the film take-up spool in response to the output of the retracted amount measuring means.
Claim 23
Dependent Claim
112 words
A camera wherein a film cartridge substantially containing a film is loaded into the camera such that a portion of film extending outside of the film cartridge initially remains outside of the camera, and after the film remaining outside of the film cartridge is retraced into the camera, the film is fed to a film take-up spool, comprising: (A) a retracted amount measuring means for measuring the amount of the film retracted into the film cartridge; and (B) a feeding amount determining means for determining the amount of the film to be fed to the side of the film take-up spool in response to the output of the retracted amount measuring means.
Claim 24
Dependent Claim
35 words
A camera according to claim 20, wherein wherein the film has perforations formed therein, and said retracted amount measuring means includes detecting means for detecting an amount of movement of the perforations in the film.
Claim 25
Dependent Claim
37 words
A camera according to claim 20, wherein said feeding amount determining means includes means for feeding such an amount of the film that at least an already exposed portion of the film is not used for photography.
Claim 26
Dependent Claim
34 words
A camera according to claim 20, wherein said feeding amount determining means includes means for feeding to the take-up spool an amount of film larger than the amount of film retracted into the camera.
Claim 27
Dependent Claim
35 words
A camera according to claim 20, wherein the film has perforations formed therein, and said feeding amount determining means includes detecting means for detecting the amount of the movement of perforations formed in the film.
Claim 28
Dependent Claim
45 words
A camera according to claim 24, in which said detecting means includes a sprocket arranged to engage with the perforations and to detect the amount of movement of said perforations, said sprocket being movable into and out of a path of movement of the film.
Claim 29
Dependent Claim
30 words
A camera according to claim 25, in which said detecting means includes energizing means for energizing said sprocket to move said sprocket into the path of movement of the film.
Claim 30
Dependent Claim
43 words
A camera according to claim 20, wherein said feeding amount determining means includes detecting means for detecting the amount of the movement of the film, said means being capable of being brought into and out of a path of movement of said film.
Claim 31
Dependent Claim
79 words
A camera according to claim 20, further comprising (a) an electrically conductive contact plate disposed in a back of the camera, and (b) first and second conductive members disposed in the back of the camera rearwardly of a path of movement of the film, whereby said first and second conductive members become electrically connected upon contact with said contact plate and electrically disconnected by interposition of the film between the contact plate and the first and second conductive members.
Claim 32
Dependent Claim
18 words
A camera according to claim 20, further comprising a holding means for holding rollers for moving the film.
Claim 33
Dependent Claim
37 words
A camera according to claim 20, further comprising a camera body member and a film pressing member arranged at an aperture portion of said camera body member, said pressing member being fixed to said camera body member.
Claim 34
Dependent Claim
20 words
A camera according to claim 30, further comprising position adjusting means for adjusting the position of said film pressing member.
References Cited (Backward Citations)
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JPS55143550A
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US4417793A
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US4504131A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-10-25 | 1992-04-25 | 1992-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-10-25 | 1996-04-25 | 1996-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-10-25 | 2000-04-25 | 2000-10-25 | $7700.00 | Window Closed / Lapsed |