| 摘要 |
PURPOSE:To achieve the simplification of operations by enabling the magnifications depending upon the combinations of the selection inputs of size keys to be obtained by the two selection inputs of the size keys. CONSTITUTION:Paper of a desired size is selectively fed onto the operation panel, and the respective size keys 15-18 for setting scale-down rations, an equal magnification copy key 10 and scale-down copy key 20 are provided, these being connected to a scale-down ratio setting driving circuit 33 by way of a key discrimination circuit 25, timing signal generating circuit 30, temporary memory circuit 31, scale-down ratio setting gate circuit 32 and to paper feed roller driving circuits 27, 28 and lamp display circuit 20 by way of an OR gate 26 and paper feed gate circuits 23, 24. When with this arrangement the two of the size keys 15-18 are selectively and subsequently pushed, the scale-down ratios corresponding to the combinations of the respective sizes are automtically set, thus many scale-down ratios are obtainable through simple operation with less keys. |
