| 摘要 |
A scanning device for a copying machine in which the original to be copied is stationary, the photosensitive paper moves on a conveyor, and a lens carriage moves at half the speed of the conveyor in the direction of its motion. The carriage rolls on wheels which rest on the conveyor and contact a fixed track from below, moving at half the speed of the conveyor because of the frictional contact of the wheels with the two parallel surfaces.
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