Willian, Brinks, Olds, Hofer, Gilson & Lione
Image forming system
 An image forming apparatus provided with an image forming part capable of reproducing on a recording medium an image information frame recorded on a microfilm. The apparatus effects a decision as to whether or not image information is present within the range of a prescribed width inwardly of the edge of the image information frame. When the presence of the image information in the range mentioned above is discerned, the part of the projected light reaching the image forming part which falls outside the edge is intercepted and the image information within the image information frame is completely reproduced on the recording medium. When the absence of the image information in the aforementioned range is confirmed, the part of the projected light which falls outside the edge and within the range of the prescribed width inwardly of the edge is intercepted so that the background part of the negative film is not reproduced on the recording medium. The position of the edge of the image information frame is discerned by the fact that the density of the projected light is automatically detected with a sensor while the light is en route to the image forming part. During the detection of the position of the edge of the image information frame, the detection of the density of the projected light is performed outwardly from the central part of the image information frame. 
Minolta Camera Kabushiki Kaisha
G G G
G03G G03B G03G
inventional inventional inventional
Masaaki Kazuhiko Masafumi
Kuriyama Tezuka Fujita