| 摘要 |
A compact, smoothly operating, X-Y positioning mechanism for use in microfiche projecting apparatus is disclosed. The positioning mechanism occupies an area substantially the same size as one microfiche, however is displaceable over an area approximately four times as large. Smooth translation of the positioning mechanism is provided by two pairs of parallel rollers, the rollers of one pair being disposed perpendicularly to the other pair to allow for positioning in any direction.
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