| 摘要 |
An X, Y plotter particularly adapted to use both cut paper and strip paper. A driven roller provides motion of the paper back and forth according to one signal. A moveable pen block containing the pen is moved transverse the path of the paper in response to the second signal, thus providing controlled motion in the X and Y directions. According to one aspect, an idler roller is provided parallel to the driven roller around which an endless belt is disposed to be driven in combination with the drive roller by two pairs of rows of sprockets on the driven roller adapted to mate with holes provided therefor in the belt. Cut paper temporarily attached to the belt with drafting tape or the like is moved beneath the pen for plotting purposes. The inner row of sprockets is adapted for engaging holes in strip paper for moving it beneath the pen. According to another aspect, a pair of supply/takeup driven rollers are positioned with the driven roller therebetween with a single vacuum chamber divided into two compartments for receiving respective loops on either side of the driven roller. In the preferred embodiment, the two vacuum chamber portions are disposed such that the respective loops are substantially at right angles to one another.
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