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    • 2. 发明公开
    • Anti-reversal device for printer ribbon cartridge take-up spool
    • Rücklaufsperrefürdie aufnahmespule in einer Bandpatronefüreinen Drucker。
    • EP0042955A1
    • 1982-01-06
    • EP81103626.8
    • 1981-05-12
    • International Business Machines Corporation
    • Field, Thomas RayJagodzinski, Peter FrankPatrick, Carl Douglas
    • B41J33/00
    • B41J33/16B41J33/52
    • Connected to the take-up spool (26) of the ribbon cartridge (10) is a disc member (28) supporting a pair of flexible arms (32) with outwardly oriented pointed ends (34). Ends (34) engage ratchet teeth (44) formed on the internal surface of a cylinder (42) forming part of, or attached to, the ribbon cartridge (10). As disc (28) and arms (32) are rotated by the ribbon feed mechanism, arms (32) will flex and permit a rotation of disc (28) and take-up spool (26) with a minimal drag force. Upon reversal, the ends (34) of arms (32) engage ratchet teeth (44) and arms (32) become compression columns resisting the rotation of disc (28) and spool (26). Ends (34) of arms (32) are positioned such that they are one-half tooth out of phase to ensure that one tooth is always in engagement with the end (34) of one of the two arms (32).
    • 连接到色带盒(10)的卷取卷筒(26)的是具有向外定向的尖端(34)的一对柔性臂(32)的盘构件(28)。 端部(34)接合形成在形成色带盒(10)的一部分或连接到色带盒(10)的圆筒(42)的内表面上的棘齿(44)。 当盘(28)和臂(32)通过色带供给机构旋转时,臂(32)将以最小的拖曳力弯曲并允许盘(28)和卷取卷筒(26)的旋转。 一旦反转,臂(32)的端部(34)接合棘齿(44),并且臂(32)变为抵抗盘(28)和线轴(26)的旋转的压缩柱。 臂(32)的端部(34)被定位成使得它们是异相的两个齿,以确保一个齿总是与两个臂(32)中的一个的端部(34)接合。