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公开(公告)号：US4601596A
公开(公告)日：1986-07-22
申请号：US586967
申请日：1984-03-07
申请人： Pietro Musso
发明人： Pietro Musso
摘要： The typing and erasing device is applied to a printer of the daisywheel type and comprises a carrier (84, 86) for a typing ribbon (32) having a plurality of transverse tracks which can be selected for the printing operation and a carrier for an erasing ribbon which is disposed parallel to but at a different height from the typing ribbon. The typing ribbon is contained in a cartridge on which two typing ribbon carrier arms (41) are pivoted. The carriers oscillate vertically in order to render visible the typed characters and for the operations of typing or erasing the characters at the typing point (12). A cam (81) for actuating the typing ribbon, which is controlled by a control shaft (56) selectively and successively positions the various tracks of the typing ribbon, and a second actuating cam (61) positions the correction ribbon independently of the position of the typing ribbon by way of a cam-follower pin (126) and a lever (127) which actuates the correction ribbon carrier and also the correction ribbon feed mechanism. The second cam (61) has interconnected tracks (122, 123, 124) such that selection of the correction ribbon is effected only in response to one direction of movement of the control shaft. The second cam (61) also actuates a lever (63) of the typing ribbon-feed mechanism. The cam (81) is three-lobed and rotates 120.degree. for each complete rotation of the control shaft (56) and second cam (61) fixed thereto.
摘要翻译： 打字和擦除装置被应用于菊花轮类型的打印机，并且包括用于打字色带（32）的载体（84,86），其具有可以被选择用于打印操作的多个横向轨道和用于擦除的载体 色带平行于与打字色带不同的高度设置。 打字色带包含在其中两个打字色带托架臂（41）枢转的盒中。 载体垂直振荡，以便使键入的字符可见，以及在打字点处键入或擦除字符的操作（12）。 用于致动打字色带的凸轮（81），其由控制轴（56）控制，选择性地并且连续地定位打字色带的各种轨道，并且第二致动凸轮（61）将校正带独立于位置 打印带通过凸轮从动销（126）和杠杆（127），其驱动校正色带托架以及校正色带进给机构。 第二凸轮（61）具有互连的轨道（122,123,124），使得校正带的选择仅在响应于控制轴的一个运动方向的情况下进行。 第二凸轮（61）还致动打字色带馈送机构的杆（63）。 凸轮（81）在控制轴（56）和固定于其上的第二凸轮（61）的每次完全旋转时为三叶片并旋转120度。
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