| 摘要 |
PURPOSE:To make the operation easy by providing a means, which displays the size and the projection range of an enlarged projection image, not on a screen but on a frame on the outside of the screen not to hinder observation of the microfilm enlarged projection image on the screen. CONSTITUTION:Corner marks for matching of four corners of the enlarged projection image in every copy mode are not described on a screen 3. Instead, enclosing lines 61, 62, and 63 which indicate longitudinal lengths of 5 kinds of copy mode, namely, A4Y, A4T, A3Y, A3T, and A2Y and their ranges are provided on a longitudinal frame 2a along the screen outside circumference of a screen frame 2. Enclosing lines 65-68 which indicate lateral lengths of them and their ranges are described on a lateral frame 2b. Respective symbols of indications A4T, A4Y, A3T, A3Y, and A2 for individual copy modes described near centers of enclosing lines provided on the lateral frame 2b are described on surfaces of self-illuminating switches 70-74.
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