| 摘要 |
The disclosure is of an impact printer assembly for use in facsimile machines or the like comprising a housing which contains a plurality of parallel slidable plates, each of which carries an electrical winding in the form of a coil. Each plate and its coil is disposed between a pair of magnets with the coil in operative relation with the magnets. The magnets are positioned so that a north pole is adjacent to one surface of a plate and a south pole is adjacent to the opposite surface of the plate. Thus, each magnet is in operative relation with two plates except for the first and last magnets of the assembly. The printer assembly includes a plurality of parallel printing plates, each of which has a leading portion which provides the desired impact and a second portion which is in engagement with a plate and is driven thereby when signal current flows through the coil on that plate. When current is supplied to the coil of a plate in the proper direction, the plate is urged in a direction such that the associated printing plate strikes the paper and forms a character. Current flow in the opposite direction reverses the plate and retracts it and the printing plate back to the ready-to-print position.
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