Method and device for detecting full condition in a receiving magazine of a film handling apparatus
AssigneeMinnesota Mining and Manufacturing Company
InventorAndrea Gagliardo
Life of this patent
Estimating the term…
Abstract
To provide a simple way to control full magazine condition in apparatus where films driven to the receiving magazine rest therein one on the other, the method provides for the following steps: sending an IR light signal toward the films in the magazine; letting the signal be reflected by the last arrived film; collecting the reflected signal with a photosensor; having the photosensor emit an alarm signal when the intensity of the light collected thereby is greater than threshold value of the photosensor itself, thereby showing that the last arrived film is too near to the photosensor, because the magazine is full; repeating the above steps every time a film is fed. This method allows also film jammed detection out side the magazine.
Claims19
A method for detecting at least one condition selected from the group consisting of a) film jammed outside a magazine and b) full magazine conditions in a film receiving magazine of a film handling apparatus, wherein films are driven along a film path to the receiving magazine in which they rest one on the other, characterized by comprising the steps of:
- sending an IR light signal toward the films in the magazine;
- letting the signal be reflected by the last arrived film in the magazine;
- collecting the reflected signal with a photosensor;
- having the photosensor emit an alarm when the intensity of the light collected thereby is greater than a threshold value of the photosensor itself, thereby showing that the last arrived film is too near to the photosensor, because of a jam or because the magazine is full;
- and
- repeating the steps every time a film is fed.
Method for detecting film jammed outside a magazine and full magazine conditions in a film receiving magazine of a film handling apparatus, wherein films are driven along a film path to the receiving magazine in which they rest one on the other, characterized by comprising the steps of:
- sending a first IR light signal having a first lower power toward the films in the magazine;
- letting the signal be reflected by the last arrived film;
- collecting the reflected signal with a photosensor;
- having the photosensor emit a film jam alarm signal when the intensity of the light collected thereby is greater than the threshold value of the photosensor itself, thereby showing that the last arrived film is at a distance from the photosensor which corresponds to the position of a jammed film;
- sending a second IR light signal having a second higher power toward the films in the magazine;
- letting the signal be reflected by the last arrived film;
- collecting the reflected signal with the photosensor;
- having the photosensor emit a full magazine alarm signal when the intensity of the light collected thereby is greater than the threshold value of the photosensor itself, thereby showing that the last arrived film is at a distance from the photosensor which corresponds to the full condition of the magazine;
- repeating the above steps every time a film is fed.
A device for detecting at least one condition selected from a) film jammed outside a magazine and b) full magazine conditions in a film receiving magazine of a film handling apparatus, wherein films are driven along a film path to the receiving magazine in which they rest one on the other, characterized by comprising an IR light source and an IR photosensor placed over the magazine and oriented thereto, the light source and the photosensor being tuned so as to have an alarm signal emitted by the photosensor when the intensity of the light collected is greater than a threshold value of the photosensor itself, thereby indicating that the last received film is too near to the photosensor, because of a jam or because the magazine is full.
A photographic exposing apparatus which comprises a film feed magazine for feeding photographic film into an exposure site, an exposure site, and a film receiving magazine, wherein said film receiving magazine contains a device for detecting in said photographic exposing apparatus at least one condition selected from a) film jammed outside said film receiving magazine and b) full magazine conditions in said film receiving magazine, wherein photographic films are driven along a light tight film path from the feeding magazine, through said exposure site, to the receiving magazine in which they rest one on the other, said device for detecting comprising an IR light source and an IR photosensor placed over the magazine and oriented thereto, the light source and the photosensor being tuned so as to have an alarm signal emitted by the photosensor when the intensity of the light collected is greater than a threshold value of the photosensor itself, thereby indicating that the last received film is too near to the photosensor, because of a jam or because the magazine is full.
Dependencies are inferred from the claim text.