发明公开
EP0143575A3 Variable impact printing apparatus and method 失效
可变影响印刷设备和方法

Variable impact printing apparatus and method
摘要:
A variable impact printing mechanism includes a supporting magnetic structure (12) having a plurality of circumferential coils (40-48) mounted thereon and having a central bore (14) in which a magnetic hammer (16) is positioned for linear movement to cooperate with a type member (22) positioned adjacent to one end of the bore (14) in order to effect printing on a record member (24) positioned between the hammer (16) and the type member (22). A controller (100) including a microprocessor and table look-up memory is provided to energize drivers (50-58) for the various coils (40-48) in predetermined sequences to vary the velocity achieved by the hammer (16) at the end of its printing movement in accordance with varying printing requirements.
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