Ribbon drive for a thermal demand printer
    2.
    发明授权
    Ribbon drive for a thermal demand printer 失效
    色带驱动器用于热需求打印机

    公开(公告)号:US6034708A

    公开(公告)日:2000-03-07

    申请号:US789166

    申请日:1997-01-24

    摘要: A thermal demand printer for printing on media is a novel system which includes a case structure including a hinged cover panel, easily removable guide structures and media hanger, and a single central support wall to which the various components are attached. The printer includes a power supply circuit for receiving power from an external source and conditioning it for operation of the printer. An input device is provided for receiving command signals related to the operation of the printer. A control circuit for processing the command signals and generating corresponding control signals for controlling the operation of the printer and a printhead assembly for processing the control signals and generating corresponding control signals for controlling the operation of the printer are mounted in the case structure and coupled to the input device and the power supply circuit. The printhead assembly includes a printhead support structure which controls the printhead. A ribbon take-up spindle, method of operating the take-up spindle using a PMDC motor, and a spring wrap clutch device help to control the tension in the transfer ribbon used in the printer. The printer also includes a medial sensor and a method of sensing media by way of detecting the opacity of the media passing through the sensor. The printer includes a method of printhead control using double data loading and a method of accelerating and decelerating media relative to the printhead using pulse width modulation.

    摘要翻译: 用于在介质上打印的热需求打印机是一种新颖的系统,其包括壳体结构,其包括铰接盖板,易于拆卸的导向结构和介质悬挂器,以及单个中心支撑壁,各个部件附接到该中心支撑壁。 打印机包括用于从外部源接收电力并对其进行调理以用于打印机的操作的电源电路。 提供输入装置用于接收与打印机的操作有关的命令信号。 用于处理命令信号并产生用于控制打印机的操作的相应控制信号的控制电路和用于处理控制信号并产生用于控制打印机操作的相应控制信号的打印头组件安装在壳体结构中并耦合到 输入设备和电源电路。 打印头组件包括一个控制打印头的打印头支撑结构。 带状卷取轴,使用PMDC电机操作卷取轴的方法以及弹簧卷绕离合器装置有助于控制打印机中使用的转印带中的张力。 打印机还包括内侧传感器和通过检测通过传感器的介质的不透明度来感测介质的方法。 打印机包括使用双重数据加载的打印头控制方法和使用脉冲宽度调制相对于打印头加速和减速介质的方法。

    Switchable divider
    4.
    发明授权
    Switchable divider 失效
    可切换分频器

    公开(公告)号:US4200842A

    公开(公告)日:1980-04-29

    申请号:US895743

    申请日:1978-04-13

    申请人: Dan E. Monnier

    发明人: Dan E. Monnier

    IPC分类号: H03K23/66 H03K21/36

    CPC分类号: H03K23/66

    摘要: A frequency divider circuit is selectively operable for providing an output signal characterized by a first frequency or a second frequency equal to one-half the first frequency. An input signal at the first frequency is supplied to the clock terminal of a D-type flip-flop and a stream of control pulses, developed in synchronism with the input signal, are selectively coupled by a logic circuit to the set terminal of the flip-flop. The D and Q terminals of the flip-flop are coupled together forming an output for providing a signal at the first frequency in response to the presence of the control pulses and at the second frequency in response to the absence of the control pulses.

    摘要翻译: 分频器电路选择性地可操作用于提供由第一频率或第二频率表征的输出信号,其等于第一频率的二分之一。 将第一频率的输入信号提供给D型触发器的时钟端子,并且与输入信号同步显影的控制脉冲流通过逻辑电路选择性地耦合到翻盖的设定端子 -flop。 触发器的D和Q端子耦合在一起形成用于响应于控制脉冲的存在而响应于不存在控制脉冲而以第二频率提供第一频率的信号的输出。