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2. 发明授权

US4650351A Thermal printer 失效
标题翻译：热敏打印机
公开(公告)号：US4650351A
公开(公告)日：1987-03-17
申请号：US729023
申请日：1985-04-30
申请人： Vencil D. Engle , Cameron H. Hafer , Frank M. Hughes , Donald J. Steger , Edward G. Stewart , Ramon L. Street , John A. Thompson
发明人： Vencil D. Engle , Cameron H. Hafer , Frank M. Hughes , Donald J. Steger , Edward G. Stewart , Ramon L. Street , John A. Thompson
IPC分类号： B41J32/02 , B41J33/24 , B41J33/26 , B41M5/26 , B41J3/02 , B41J35/28
CPC分类号： B41J33/26
摘要： A thermal printer (10) has a thermal transfer medium (28) fed past a thermal printhead (21) at a substantially constant velocity by a feed roll (82) engaging the thermal transfer medium just prior to the printhead to maintain a portion of the thermal transfer medium between the printhead and the feed roll relatively stiff. The feed roll is mounted on a cartridge (30) having the thermal transfer medium supplied therefrom. A drag brake (70) is disposed in the feed path of the thermal transfer medium prior to the feed roll to cause a substantially constant premetering tension to be applied to the thermal transfer medium irrespective of the coefficient of friction between the drag brake and the thermal transfer medium. A carrier (14), which supports the printhead and a feed roll driver (90), is driven separately from the feed roll driver so that various ratios between the velocities of the thermal transfer medium and the carrier are obtained to produce various print qualities. One print quality occurs in a draft mode, which is a relatively high speed, in which there is substantial conservation of the thermal transfer medium. The peel angle of the thermal transfer medium from a recording medium (12) on which printing occurs is maintained at a relatively low angle to increase the contact time between the thermal transfer medium and the recording medium.
摘要翻译：热敏打印机（10）具有热传递介质（28），其通过刚好在打印头之前与热转印介质接合的进给辊（82）以基本恒定的速度被馈送通过热打印头（21），以保持一部分打印头和进料辊之间的热转印介质相对较硬。进料辊安装在其上提供有热转印介质的盒（30）上。拖曳制动器（70）设置在进给辊之前的热转印介质的进给路径中，以使得将基本上恒定的预测张力施加到热转印介质上，而不管拖曳制动器和热量传感器之间的摩擦系数如何转移介质。支撑打印头和进料辊驱动器（90）的载体（14）与进料辊驱动器分开地驱动，使得获得热转印介质和载体的速度之间的各种比率以产生各种打印质量。一个打印质量发生在一个相对较高的速度的牵伸模式中，其中存在大量的热转印介质的保存。来自记录介质（12）的热转印介质的剥离角度保持在相对低的角度，以增加热转印介质和记录介质之间的接触时间。

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