Patent US6065056A successfully refreshed from Google Patents.
Patent US4918485A successfully refreshed from Google Patents.
US4918485A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Roll film camera
Assignee: Minolta Co Ltd
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Filing: 1989-04-06
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Granted: 1990-04-17
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Expires: 2009-04-06
Abstract
Abstract A roll film camera is disclosed which comprises a supply reel for winding the part of a roll of recording medium yet to be used and a takeup reel for winding the part of the recording medium already used for photographing original images. This camera is constructed so as to be loaded with a plurality of types of recording medium which differs in thickness. The length of the part of the recording medium yet to be used is shown in a displaying part, according to the type of recording medium. When the residual amount of the recording medium of a given type decreases below a prescribed length, an alarm is issued which prompts the operator to make preparation for the loading of a new recording medium.
Inventors
- 👤 Kenjiro Ishii
- 👤 Fumio Fukumoto
- 👤 Koichi Nagata
- 👤 Akira Shibata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:43
CPC Classifications
G; G03; G03B; G03B1/00; G03B1/60; G03B1/64
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
179 words
A roll film camera for photographing original images on a strip of film wound up in a roll, which comprises: a supply reel for winding thereon the part of said roll film yet to be used for photographing original images, a takeup reel for winding the part of said roll film already used for photographing original images, photographing means disposed between said supply reel and said takeup reel and adapted to expose said roll film to original images and effect the photographing of original images on said roll film, takeup means for causing said roll film to be taken up on said takeup reel from said supply reel synchronously with the photographing motion of said photographing means, detecting means for detecting the diameter of said roll film wound on said supply reel, designating means for designating the thickness of said roll film, and converting means for converting the diameter of said roll film detected by said detecting means into the length of said roll film in accordance with the thickness of said roll film designated by said designating means.
Claim 2
Dependent Claim
179 words
A roll film camera for photographing original images on a strip of film wound up in a roll, which comprises: a supply reel for winding thereon the part of said roll film yet to be used for photographing original images, a takeup reel for winding the part of said roll film already used for photographing original images, photographing means disposed between said supply reel and said takeup reel and adapted to expose said roll film to original images and effect the photographing of original images on said roll film, takeup means for causing said roll film to be taken up on said takeup reel from said supply reel synchronously with the photographing motion of said photographing means, detecting means for detecting the diameter of said roll film wound on said supply reel, designating means for designating the thickness of said roll film, and converting means for converting the diameter of said roll film detected by said detecting means into the length of said roll film in accordance with the thickness of said roll film designated by said designating means.
Claim 3
Dependent Claim
29 words
A roll film camera according to claim 1, which further comprises displaying means for displaying the length of said roll film resulting from the conversion by said converting means.
Claim 4
Dependent Claim
45 words
A roll film camera according to claim 1, which further comprises displaying means for displaying an alarm on the residual amount of said roll film when the length of said roll film resulting from the conversion by said converting means has reached a prescribed value.
Claim 5
Dependent Claim
39 words
A roll film camera according to claim 1, wherein said detecting means is adapted to detect the diameter of the roll film wound on said supply reel based on the diameter of roll film wound on said takeup reel.
Claim 6
Dependent Claim
144 words
A roll film camera for photographing original images on a strip of film wound up in a roll, which comprises: a supply reel for winding thereon the part of said roll film yet to be used for photographing original images, means for sequentially feeding out said roll film from said supply reel, photographing means for projecting original images on said roll film fed out of said supply reel by said feeding and consequently photographing said original images on said roll film, detecting means for detecting the diameter of said roll film wound on said supply reel, designating means for the designating the thickness of said roll film, and converting means for converting the diameter of said roll film detected by said detecting means into the length of said roll film in accordance with the thickness of said roll film designated by said designating means.
Claim 7
Dependent Claim
144 words
A roll film camera for photographing original images on a strip of film wound up in a roll, which comprises: a supply reel for winding thereon the part of said roll film yet to be used for photographing original images, means for sequentially feeding out said roll film from said supply reel, photographing means for projecting original images on said roll film fed out of said supply reel by said feeding and consequently photographing said original images on said roll film, detecting means for detecting the diameter of said roll film wound on said supply reel, designating means for the designating the thickness of said roll film, and converting means for converting the diameter of said roll film detected by said detecting means into the length of said roll film in accordance with the thickness of said roll film designated by said designating means.
Claim 8
Dependent Claim
28 words
A microfilm camera according to claim 5, which further comprises displaying means for displaying the length of said roll film resulting from the conversion by said converting means.
Claim 9
Dependent Claim
44 words
A microfilm camera according to claim 5, which further comprises displaying means for displaying an alarm on the residual amount of said roll film when the length of said roll film resulting from the conversion by said converting means has reached a prescribed value.
Claim 10
Dependent Claim
204 words
A roll film camera capable of being loaded alternatively with first and second roll films differing in thickness, which comprises: a supply reel for winding a roll film for photographing original images, feeding means for sequentially feeding said roll film from said supply reel, photographing means for projecting original images on said roll film fed out of said supply reel by said feeding means and consequently photographing said original images on said roll film, detecting means for detecting the diameter of said roll film wound on said supply reel, first signal generating means for issuing a first signal when the diameter of said first roll film has reached a first prescribed value, second signal generating means for issuing a second signal when the diameter of second roll film has reached a second prescribed value, designating means for designating the kind of roll film loaded in the camera, and alarming means for issuing an alarm on the residual amount of said roll film based on said first signal from said first signal generating means when said designating means is designating the first roll film or based on said second signal from said second signal generating means when said designating means is designating said roll film.
Claim 11
Dependent Claim
204 words
A roll film camera capable of being loaded alternatively with first and second roll films differing in thickness, which comprises: a supply reel for winding a roll film for photographing original images, feeding means for sequentially feeding said roll film from said supply reel, photographing means for projecting original images on said roll film fed out of said supply reel by said feeding means and consequently photographing said original images on said roll film, detecting means for detecting the diameter of said roll film wound on said supply reel, first signal generating means for issuing a first signal when the diameter of said first roll film has reached a first prescribed value, second signal generating means for issuing a second signal when the diameter of second roll film has reached a second prescribed value, designating means for designating the kind of roll film loaded in the camera, and alarming means for issuing an alarm on the residual amount of said roll film based on said first signal from said first signal generating means when said designating means is designating the first roll film or based on said second signal from said second signal generating means when said designating means is designating said roll film.
Claim 12
Dependent Claim
115 words
A supply apparatus for feeding a strip of recording medium, which comprises: a supply reel for winding the part of said strip of recording medium yet to be used, payout means for sequentially paying out said strip of recording medium wound on said supply reel, detecting means for detecting the diameter of said strip of recording medium wound on said supply reel, designating mean for designating the thickness of said strip of recording medium, and converting means for converting the diameter of said strip of recording medium detected by said detecting means into the length of said strip of recording medium in accordance with the thickness of said recording medium designated by said designating means.
Claim 13
Dependent Claim
115 words
A supply apparatus for feeding a strip of recording medium, which comprises: a supply reel for winding the part of said strip of recording medium yet to be used, payout means for sequentially paying out said strip of recording medium wound on said supply reel, detecting means for detecting the diameter of said strip of recording medium wound on said supply reel, designating mean for designating the thickness of said strip of recording medium, and converting means for converting the diameter of said strip of recording medium detected by said detecting means into the length of said strip of recording medium in accordance with the thickness of said recording medium designated by said designating means.
Claim 14
Dependent Claim
30 words
A supply apparatus according to claim 9, which further comprises displaying means for displaying the length of said strip of recording medium resulting from the conversion by said converting means.
Claim 15
Dependent Claim
42 words
A supply apparatus according to claim 9, which further comprises displaying mean for displaying an alarm as to the residual amount of said roll film when the length of said recording medium converted by said converting means has reached a prescribed value.
Claim 16
Dependent Claim
158 words
A supply apparatus for supplying first and second strips of recording medium differing in thickness, which comprises: a supply reel for winding said strips of recording medium, payout means for sequentially feeding said recording medium from said supply reel, detecting means for detecting the diameter of said recording medium wound on said supply reel, first signal generating means for issuing a first signal when the diameter of said first recording medium has reached a first prescribed value, second signal generating means for issuing a second signal when the diameter of said second recording medium has reaches a second prescribed value, and alarming means for issuing an alarm on the residual amount of said recording medium, based on said first signal from said first signal generating means when said designating means is designating said first recording medium or based on said second signal from said second signal generating means when said designating means is designating said second recording medium.
Claim 17
Dependent Claim
158 words
A supply apparatus for supplying first and second strips of recording medium differing in thickness, which comprises: a supply reel for winding said strips of recording medium, payout means for sequentially feeding said recording medium from said supply reel, detecting means for detecting the diameter of said recording medium wound on said supply reel, first signal generating means for issuing a first signal when the diameter of said first recording medium has reached a first prescribed value, second signal generating means for issuing a second signal when the diameter of said second recording medium has reaches a second prescribed value, and alarming means for issuing an alarm on the residual amount of said recording medium, based on said first signal from said first signal generating means when said designating means is designating said first recording medium or based on said second signal from said second signal generating means when said designating means is designating said second recording medium.
Claim 18
Dependent Claim
25 words
A supply apparatus according to claim 12, which further comprises displaying device for displaying the length of said recording medium converted by said converting means.
Claim 19
Dependent Claim
41 words
A supply apparatus according to claim 12, which further comprises displaying means for issuing an alarm on the residual amount of said roll film when the length of said recording medium converted by said converting means has reached a prescribed value.
References Cited (Backward Citations)
US3816842A
Cited
JPS5875164A
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JPS5968748A
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US4576455A
Cited
US4758851A
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JPS62294227A
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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) | 1993-04-16 | 1993-10-16 | 1994-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-04-16 | 1997-10-16 | 1998-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-04-16 | 2001-10-16 | 2002-04-17 | $7700.00 | Window Closed / Lapsed |