Heating circuit for a thermal recording-pen
    1.
    发明授权
    Heating circuit for a thermal recording-pen 失效
    用于热记录笔的加热电路

    公开(公告)号:US4565918A

    公开(公告)日:1986-01-21

    申请号:US472933

    申请日:1983-03-07

    CPC分类号: G01D15/10

    摘要: In an automatic recording instrument having a thermal recording-pen to record on a heat sensitive recording-paper, an operational amplifier output supplies the heating current to the thermal pen through a resistor. A non-linear transfer element receives the output voltage of the amplifier and delivers a voltage having a predetermined non-linear relation to its input. The voltage difference between the output of the non-linear transfer element and the junction point of the thermal pen to the resistor is feedback connected to the input of the amplifier. When the relative velocity between the pen and the paper is increased, the input voltage of the amplifier is increased to increase the output voltage, and when the output voltage is increased, the resistance of the thermal pen is increased to balance to the output of the non-linear transfer element for reducing the input to the amplifier. This means that the heated temperature of the thermal pen is raised when the pen moves faster on the paper and a constant thickness of the recording is maintained in a wide range of the relative velocity between the pen and the paper.

    摘要翻译: 在具有记录在热敏记录纸上的热记录笔的自动记录装置中,运算放大器输出通过电阻将加热电流提供给热笔。 非线性传递元件接收放大器的输出电压,并向其输入端传递具有预定非线性关系的电压。 非线性传输元件的输出与热笔与电阻的连接点之间的电压差反馈到放大器的输入端。 当笔和纸之间的相对速度增加时,增加放大器的输入电压以增加输出电压,并且当输出电压增加时,热笔的电阻增加以平衡到 非线性传输元件,用于减小放大器的输入。 这意味着当笔在纸张上移动得更快时,热笔的加热温度升高,并且记录的恒定厚度保持在笔和纸之间的相对速度的宽范围内。

    Thermal pen
    2.
    发明授权
    Thermal pen 失效
    热笔

    公开(公告)号:US4297714A

    公开(公告)日:1981-10-27

    申请号:US71035

    申请日:1979-08-30

    IPC分类号: G01D15/10 B41J2/335 G01D5/10

    CPC分类号: G01D5/10

    摘要: A thermal pen of thick film type comprises a thermal pen tip and a thermal pen tip holder connected to the thermal pen tip for holding the thermal pen tip. The thermal pen tip comprises a high resistance substrate formed in the form of a pen point, a heater element formed in the form of a thick film on the end of the pen point of the high resistance substrate and an electric conductor formed in the form of a thick film so as to connect to the heater element. The thermal pen tip is preferably provided with a heat-resistant protective coating to cover the end of the pen point. A heat- and wear-resistant heat-sensitive recording piece is preferably provided in a heat conductive relation to said heater element.

    摘要翻译: 厚膜型热笔包括热笔尖和连接到热笔尖的热笔尖保持器,用于保持热笔尖。 热笔尖包括以笔尖形式形成的高电阻衬底,在高电阻衬底的笔尖的端部上形成厚膜形式的加热器元件和形成为 厚膜以连接到加热器元件。 热笔尖端优选设置有覆盖笔尖端部的耐热保护涂层。 耐热耐磨热敏记录片优选地以与所述加热器元件的导热关系设置。