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Method and apparatus for positioning control

Image Number 3 for United States Patent #3965562.

In order to accurately position a plurality of work pieces in registration with a plurality of corresponding target positions on another work piece, the distance between a first detector, which detects one of the positions of a plurality of positioning targets on a single first workpiece, and another detector for detecting the position of another positioning target on the work piece is made equal to the distance between the positioning targets. One of a second plurality of other work pieces is positioned in registration with one of the positioning targets and a detecting mechanism provided with the detectors is rotated about a prescribed reference position. Then another positioning target on the first work piece is detected by means of the detecting mechanism, so that the positions Of the plurality of second work pieces will be brought into registration with the plurality of positioning targets on the first work piece.

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