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公开(公告)号：EP0143575A2
公开(公告)日：1985-06-05
申请号：EP84307797.5
申请日：1984-11-12
IPC分类号： B41J9/26
CPC分类号： B41J9/48
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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2.发明公开Apparatus and method for automatically determining defective thermal printhead elements 失效Gerätund Methode zur automatischen Bestimmung defekter Heizelemente in einem Druckkopf。
公开(公告)号：EP0174751A1
公开(公告)日：1986-03-19
申请号：EP85305794.1
申请日：1985-08-14
IPC分类号： B41J3/20
摘要： In a thermal printer, data in the form of character data separated by gaps is supplied over a data line (38) to a shift register (15). the latched outputs of which cause operation of thermal elements (R 1 -R N ) in a thermal printhead (11 During a test mode of operation, test data is supplied to operate the thermal elements (R 1 -R N ) in succession, a sensing resistor (R s ) providing corresponding test signals which are digitized by an A/D converter (39). Each digitized test signal is compared with an associated initial, stored, digitized test signal, and if the current value deviates by more than a predetermined amount from the initial value, a failure signal is provided. A processor (19) is thereupon effective to cause the subsequent character data to be shifted such that the defective element is aligned with a location which is not used for printing, such as an intercharacter gap. In a modification, the test signals for all the thermal elements (R 1 -R N ) are compared with a common fixed, predetermined reference level.
摘要翻译： 在热敏打印机中，通过间隙分离的字符数据形式的数据通过数据线（38）提供给移位寄存器（15），其锁存输出使得热元件（R1-RN）在热 打印头（11）。 在测试操作模式期间，提供测试数据以连续地操作热元件（R1-RN），提供由AD转换器（39）数字化的相应测试信号的感测电阻器（RS）。 将每个数字化的测试信号与相关联的初始，存储的数字化测试信号进行比较，并且如果当前值从初始值偏移超过预定量，则提供故障信号。 因此，处理器（19）有效地使随后的字符数据被移位，使得缺陷元件与不用于打印的位置（诸如间隙间隙）对齐。 在修改中，将所有热元件（R1-RN）的测试信号与公共固定的预定参考电平进行比较。
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3.发明授权Apparatus and method for automatically determining defective thermal printhead elements 失效用于自动确定有缺陷的热打印元件的装置和方法
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公开(公告)号：EP0143575A3
公开(公告)日：1986-01-08
申请号：EP84307797
申请日：1984-11-12
IPC分类号： B41J09/26
CPC分类号： B41J9/48
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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