| 摘要 |
A flat-bed scanner for facsimile transceivers permits an original document to be inserted for scan reading and the sheet materials necessary for scan print-out to be operatively engaged respectively by the scanning read heads or writing stylii by mounting these scanning elements on an endless belt driven on two spaced pulleys. The original document is read by the read heads as they move in one direction between the pulleys and the print-out occurs on the opposite side of the pulley assembly as the writing stylii are transported by the belt on its return run. By establishing "diametric symmetry" simplified phase synchronization of two units is obtained independent of the direction of transmission.
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