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    • 4. 发明授权
    • Ribbon cartridge having slack preventing means
    • 色带盒具有松弛防止装置
    • US4074799A
    • 1978-02-21
    • US704801
    • 1976-07-13
    • Yukio HishidaTomoyoshi WatanabeTakanobu HirayamaHideo Asakura
    • Yukio HishidaTomoyoshi WatanabeTakanobu HirayamaHideo Asakura
    • B41J32/00B41J33/14
    • B41J32/00
    • A ribbon cartridge includes a pair of housings having apertures, a pair of ribbon spools rotatably supported in the housings, and a ribbon wound on the spools. A portion of the ribbon is exposed to the outside of the housings through the apertures when the ribbon is fed from one spool to the other. Each housing rotatably supporting a hold member. The hold member has a holding portion which is movable across a ribbon passage within the respective housings for holding the ribbon and has an engaging portion which is engageable with teeth on a flange of each spool, and each hold member is biased by a spring member. When the cartridge is removed from the typewriter, the holding portion is moved across the ribbon passage and a portion of the ribbon slackened and exposed from the housing is tensioned. The engaging portion prevents the rotation of the respective spools by the biasing force of the spring member, and when the cartridge is installed in the typewriter, the hold member is retracted to a released position by a retract member of the typewriter.
    • 色带盒包括具有孔的一对壳体,一对可旋转地支撑在壳体中的色带卷轴和缠绕在卷轴上的色带。 当色带从一个卷轴馈送到另一个卷轴时,带的一部分通过孔暴露于壳体的外部。 每个壳体可旋转地支撑保持构件。 保持构件具有保持部分,该保持部分可跨过各个壳体内的带状通道移动以保持色带,并具有与每个卷轴的凸缘上的齿接合的接合部分,并且每个保持构件被弹簧构件偏置。 当墨盒从打字机中取出时,保持部分移动穿过色带通道,并且从外壳松弛并露出的色带的一部分被张紧。 接合部通过弹簧部件的作用力来防止各个卷轴的旋转,并且当打印机安装在打印机中时,保持部件通过打字机的退回部件缩回到释放位置。