US3796489A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microfiche camera
Assignee: Canon Inc
•
Filing: 1972-05-25
•
Granted: 1974-03-12
•
Expires: 1992-05-25
Abstract
Abstract A microfiche camera has a film positioning system in which a film carrier is arranged to be driven in the transverse dimension of the film. Accurate reference exposure position is assured by a light source and a photo-electric cell, one of which is on the carrier while the other has a fixed position in the camera. The registry of these elements that stops the shifting device is made precise by the use of a slit. For successive exposures lengthwise of the film, the film is pulled through the carrier by a roller drive, the load of which is kept light by maintainence of a loop on both ends of the exposure area. The loop maintainence arrangement in one form has only one photocell and light source pair for each loop chamber.
Inventors
- 👤 Y Sone
- 👤 T Toda
- 👤 K Kashiwagi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:54
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/32; G03B27/52; G03B27/58; G03B27/583
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
254 words
In a microfiche camera of the type comprising means for transporting an unexposed film means for taking up the exposed film, optical means, means for shifting the film transversely thereof relative to said optical means in an exposure position, and means for forming the film loop, whereby a large number of data images are recorded in row and column on the film with a wider width, an improvement of said film shifting means comprising a a film carrier member for holding the film in said exposure position arranged opposite to said optical means, b means for driving said carrier member transversely of the film, c a light source means for generating a light beam, d light receiving means disposed in a predetermined position relative to said carrier member and said optical means for receiving said light beam from said light source means to generate an electrical signal, wherein one of either of said light source means or said light receiving means is mounted on said film carrier member to move in unison therewith, while the other is disposed in the path of movement of said carrier member, and e control means coupled to said light receiving means for stopping said driving means, whereby when said light receiving means receives said light beam by the relative movement between said carrier member and light receiving means, said driving means is stopped by said electric signal generated by said light receiving means to stop said film carrier member at a reference relative position with said optical means.
Claim 2
Dependent Claim
254 words
In a microfiche camera of the type comprising means for transporting an unexposed film means for taking up the exposed film, optical means, means for shifting the film transversely thereof relative to said optical means in an exposure position, and means for forming the film loop, whereby a large number of data images are recorded in row and column on the film with a wider width, an improvement of said film shifting means comprising a a film carrier member for holding the film in said exposure position arranged opposite to said optical means, b means for driving said carrier member transversely of the film, c a light source means for generating a light beam, d light receiving means disposed in a predetermined position relative to said carrier member and said optical means for receiving said light beam from said light source means to generate an electrical signal, wherein one of either of said light source means or said light receiving means is mounted on said film carrier member to move in unison therewith, while the other is disposed in the path of movement of said carrier member, and e control means coupled to said light receiving means for stopping said driving means, whereby when said light receiving means receives said light beam by the relative movement between said carrier member and light receiving means, said driving means is stopped by said electric signal generated by said light receiving means to stop said film carrier member at a reference relative position with said optical means.
Claim 3
Dependent Claim
121 words
An improvement as set forth in claim 1, wherein said light source means comprises a light source mounted upon said film carrier member in opposed relation with said optical means and a slit disposed in front of said light source, said light receiving means comprises a sole photoelectric cell which generates an electrical signal when it receives the light from said light source, and said control means comprises a position control circuit which is connected into a driving circuit of said driving means and regulates the relative position between said carrier member and said optical means, wherein said position control circuit stops said driving means when said photoelectric cell receives the light from said light source and generates an electrical signal.
Claim 4
Dependent Claim
45 words
An improvement as set forth in claim 1, wherein said microfiche camera further comprises a switch means for switching the direction of said driving means in response to the output signal generated when said carrier member has reached at the terminal position of its movement.
Claim 5
Dependent Claim
233 words
A microfiche camera for photographing a number of images in the form of a matrix on a wide microfilm comprising means for supplying an unexposed film, means for winding up an exposed film, optical means for forming an image of an object to be photographed on the surface of said film, shifting means for shifting said film in the direction of the width of the film relative to said optical means at an exposure position, loop means for forming a loop of said film, wherein said loop means comprises a first and a second loop chambers provided upstream and downstream of said exposure position, respectively, with respect to the direction of feeding of said film, two pairs of light source and a photoelectric cell, each pair being provided on opposed walls of each of said loop chambers, the light path between said light source and said photoelectric cell being interrupted by the loop of said film when said loop of said film reaches at a predetermined value, film driving means disposed in the vicinity of said exposure position for transporting said film in normal and reverse directions, and control means for controlling said supplying means and said winding up means in response to the normal and reverSe switching of said film driving means and the output signal of said photoelectric cell to maintain the amount of the loop in said loop chambers constant.
Claim 6
Dependent Claim
233 words
A microfiche camera for photographing a number of images in the form of a matrix on a wide microfilm comprising means for supplying an unexposed film, means for winding up an exposed film, optical means for forming an image of an object to be photographed on the surface of said film, shifting means for shifting said film in the direction of the width of the film relative to said optical means at an exposure position, loop means for forming a loop of said film, wherein said loop means comprises a first and a second loop chambers provided upstream and downstream of said exposure position, respectively, with respect to the direction of feeding of said film, two pairs of light source and a photoelectric cell, each pair being provided on opposed walls of each of said loop chambers, the light path between said light source and said photoelectric cell being interrupted by the loop of said film when said loop of said film reaches at a predetermined value, film driving means disposed in the vicinity of said exposure position for transporting said film in normal and reverse directions, and control means for controlling said supplying means and said winding up means in response to the normal and reverSe switching of said film driving means and the output signal of said photoelectric cell to maintain the amount of the loop in said loop chambers constant.
Claim 7
Dependent Claim
68 words
A microfiche camera according to claim 4, wherein said control means comprises a gate circuit adapted for an output signal from said photoelectric cell of said first loop chamber and normal and reverse signals from said film driving means, the output from said gate circuit being supplied to said driving circuit of the driving source of said supplying means to switch the driving direction of said driving source.
Claim 8
Dependent Claim
69 words
A microfiche camera according to claim 4, wherein said control means comprises a gate circuit adapted to receive an output signal from said photoelectric cell of said second loop chamber and normal reverse signals from said film driving means, the output from said gate circuit being supplied to said driving circuit of the driving source of said winding up means to switch the driving direction of said driving source.
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) | 1977-03-11 | 1977-09-10 | 1978-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-11 | 1981-09-10 | 1982-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-11 | 1985-09-10 | 1986-03-12 | $7700.00 | Window Closed / Lapsed |