公开(公告)号：US4545693A

公开(公告)日：1985-10-08

申请号：US540967

申请日：1983-10-11

申请人： John C. Bartlett ,  Alan E. Bohnhoff ,  Donald F. Croley ,  Stanley Dyer ,  Kenneth E. Edds ,  Frank J. Horlander ,  Donald W. Stafford

发明人： John C. Bartlett ,  Alan E. Bohnhoff ,  Donald F. Croley ,  Stanley Dyer ,  Kenneth E. Edds ,  Frank J. Horlander ,  Donald W. Stafford

IPC分类号： B41J2/325 ,  B41J29/36 ,  B41J29/373 ,  B41J3/00

CPC分类号： B41J29/373 ,  B41J2/325

摘要： Ribbon (22) in thermal printing has an outer layer which adheres to printed characters at intermediate temperatures, lower than printing temperatures. The printhead (7) has a column of electrodes (9) which sweep across the character area. Lift-off is accomplished by the pattern control (40) controlling the current source (38) to provide rapid, square wave pulses displaced in phase 180 degrees at adjoining electrodes (9). The high level of the pulses is about that of the level at printing, and the pulses are sufficiently rapid so that their net effect is to raise the outer layer ribbon (22) to the intermediate temperature. At areas corresponding to underlines of characters, duration of the up period is longer. Good, long term reliability is achieved by the significant erase level being very close to the print level.

摘要翻译： 热敏打印中的色带（22）具有在低于印刷温度的中间温度下粘附于印刷字符的外层。 打印头（7）具有扫过字符区域的电极列（9）。 通过控制电流源（38）的模式控制（40）来实现提升，以提供在相邻电极（9）处以相位180度位移的快速方波脉冲。 脉冲的高电平大约是打印时的电平，并且脉冲是足够快的，使得它们的净效应是将外层带（22）升高到中间温度。 在与字符下划线相对应的区域，上升期的持续时间较长。 良好的长期可靠性是通过显着的擦除级别非常接近于打印级别实现的。

公开(公告)号：US4345845A

公开(公告)日：1982-08-24

申请号：US275183

申请日：1981-06-19

申请人： Alan E. Bohnhoff ,  Bruce M. Cassidy ,  Stanley Dyer

发明人： Alan E. Bohnhoff ,  Bruce M. Cassidy ,  Stanley Dyer

IPC分类号： B41J2/32 ,  B41J2/325 ,  B41J2/355 ,  B41J2/425 ,  B41J3/02

CPC分类号： B41J2/355 ,  B41J2/325

摘要： An electrode drive configuration for a resistive ribbon thermal printer utilizes as a feedback a monitored signal representative of an internal ribbon voltage at the print point. A monitoring contact is preferably located on the opposite side of the printhead from the drive signal return contact and the feedback signal is used to cancel the effects voltage drop variations in the common return portion of the drive signal path.

摘要翻译： 用于电阻色带热敏打印机的电极驱动配置利用表示打印点处的内部色带电压的监视信号作为反馈。 监控触点优选地位于与驱动信号返回触点相对的打印头的相对侧，并且反馈信号用于消除驱动信号路径的公共返回部分中的影响电压降变化。