发明名称 |
Semi-automatic centering control |
摘要 |
Disclosed is a control mechanism and device for conditioning a typewriter to backspace on every other depression of a keylever and at the same time to prevent printing on all depressions of keylevers. Additionally, the typewriter is conditioned to not print on those cycles in which a backspace movement is not included.
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申请公布号 |
US4022312(A) |
申请公布日期 |
1977.05.10 |
申请号 |
US19750644255 |
申请日期 |
1975.12.24 |
申请人 |
INTERNATIONAL BUSINESS MACHINES CORPORATION |
发明人 |
ABELL, JR., WILLIAM ALBERTUS |
分类号 |
B41J19/62;B41J21/08;(IPC1-7):B41J23/20 |
主分类号 |
B41J19/62 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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