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| Sensitive measuring cell for a differential refractometer of the interference type |
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| Surface mountable air towel |
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| Athletic shoe |
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| Stepped polygon scan mirror |
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| Photoelectric device with optical fiber and laser emitting chip |
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| Method and apparatus for fabricating thermoplastic containers |
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| Wet type developing device for use in electrophotography |
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| Method of making connector for light-conductive fibers |
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| Method of warm runner injection molding phenolic resins with para-substituted phenol |
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Method of detecting frame edge
| Details |
Inventors: Matsumoto, Fumio;
Assignee: Fuji Photo Film Co., Ltd. (Kanagawa, JP)
Primary Examiner: Nelms; David C.
Assistant Examiner: Messinger; Michael
Attorney, Agent or Firm: Sughrue, Mion, Zinn, Macpeak & Seas
A method of detecting a frame edge of a film by a first group of light-receiving element arrays and a second group of light-receiving element arrays, each of the groups being composed of at least one array of light-receiving elements disposed perpendicular to the advancing direction of the film in such a manner as to be parallel with each other. The presence of a frame edge is preliminarily detected by the first group of light-receiving element arrays, and the position of the frame edge is precision-detected by the second group of light-receiving element arrays. Accordingly, since the precision detetction is effected after preliminary detection, the range of precision detection can be narrowed, thereby shortening the detection time. |
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DETAILED DESCRIPTION Accordingly, an object of the present invention is to enhance the practicability and versatility of the above-described positioning method proposed by the present applicant, i.
e.
, to provide a method of detecting a frame edge which makes it possible to feed a film at high speed as a whole by feeding the film at high speed at a portion of the film in the vicinity of the range of precision detection by making narrow the range of precision detection of the frame edge position by fine-pitch film feeding in relation to preliminary detection, in such a manner that automatic positioning can be effected efficiently with respect to a leading frame irrespective of an elongated negative film and a short negative film, thereby overcoming the drawbacks of the prior art.
To this end, according to the present invention, there is provided a method of detecting a frame edge of a film fed by first and second groups of light-receiving element arrays, the first group of light-receiving element arrays being composed of at least one array extending perpendicularly of an advancing direction of the film, the second group of light-receiving element arrays being composed of at least one array extending in the same direction as that of the first group of light-receiving element arrays in such a manner as to be parallel with the first group of light-receiving element arrays, comprising the steps of: (a) preliminarily detecting the presence of the frame edge by the first group of light-receiving element arrays; and (b) precision-detecting the position of the frame edge by the second group of light-receiving element arrays after preliminary detection of the frame edge.
According to the present invention, the presence of a frame edge is detected preliminarily by the first group of light-receiving element arrays, and the position of the frame edge is precision-detected by the second group of light-receiving element arrays.
Thus, since the presence of the frame edge is detected preliminarily, the range of precision detection of the frame edge can be restricted to a small range
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Nonmetallic Processes 
