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    • 1. 发明授权
    • Printing ribbon feeding mechanism in a printer
    • 在打印机中打印RIBBON送料机构
    • US3786906A
    • 1974-01-22
    • US3786906D
    • 1972-07-11
    • COPAL CO LTD
    • OKABE K
    • B41J33/512B41J33/50B41J33/44
    • B41J33/50B41J33/512
    • Printing ribbon feeding mechanism in a printer having a pair of ribbon reel supporting shafts alternately driven in the opposite directions to each other so as to feed the printing ribbon from a reel supported on one of the shafts to a reel supported on the other shaft and vice versa. The feeding mechanism has a ratchet feeding member reciprocably moved between a pair of ratchet wheels secured to the shafts, respectively, each time the printing operation is effected, and swingable to alternately engage with either of the ratchet for driving the same, a detent member alternately engageable with either of the ratchet wheels so as to prevent the reverse rotation of the same, a compression spring connecting the ratchet feeding member to the detent member so that, when the ratchet feeding member engages with either one of the ratchet wheels, the detent member is also engaged with the ratchet wheel with which the ratchet feeding member engages, whereas, when the ratchet feeding member is swung to engage with the other ratchet wheel, the detent member is also swung to engage with the other ratchet wheel with which the ratchet feeding member engages, and a pair of detecting levers each adapted to detect the amount of the ribbon wound on the reel which is mounted on the respective shaft and cooperating with the ratchet feeding member so that, when the diameter of the coil of ribbon on either of the reels is reduced to a predetermined value, the detecting lever detecting the diameter reduced to the predetermined value engages with the ratchet feeding member so as to swing the same to disengage from the ratchet wheel with which it has been engaged and engage with the other ratchet wheel from which it has been disengaged thereby permitting the ribbon to be fed in the reverse direction. The reversing of the direction of feeding of the ribbon is automatically repeated during the printing operation of the printer.
    • 在具有一对色带卷轴支撑轴的打印机中印刷色带供给机构,所述一对色带卷轴支撑轴彼此相反地交替地驱动,以将印刷色带从支撑在其中一个轴上的卷轴输送到支撑在另一轴上的卷轴和副 反之亦然。 进给机构具有在每次打印操作时分别在固定到轴的一对棘轮之间往复运动的棘轮进给构件,并且可摆动地交替地与用于驱动该棘轮的棘轮交替地接合,棘爪构件交替地 可与任一个棘轮啮合,以防止其相反旋转,即将棘轮进给构件连接到止动构件的压缩弹簧,使得当棘轮进给构件与棘轮中的任一个啮合时,止动构件 还与棘轮进给构件接合的棘轮接合,而当棘轮进给构件摆动以与另一个棘轮接合时,止动构件也摆动以与棘轮进给的另一个棘轮接合 以及一对检测杆,每个检测杆适于检测卷绕在卷轴上的卷带的量 并且与棘轮进给构件配合,使得当任一个卷轴上的带状线圈的直径减小到预定值时,检测到减小到预定值的直径的检测杆与棘轮进给构件接合 为了使其从其与其啮合的棘轮脱离,与已经从其分离的另一个棘轮啮合,从而允许带沿相反方向进给。 在打印机的打印操作期间,自动重复色带馈送方向的反转。
    • 6. 发明专利
    • DE2517775C2
    • 1983-11-03
    • DE2517775
    • 1975-04-18
    • ING. C. OLIVETTI & C., S.P.A., 10015 IVREA, TORINO, IT
    • ODDICINI, GIUSEPPE, BANCHETTE, TORINO, IT
    • B41J33/512B41J33/22B41J33/26B41J33/514B41J33/516B41J35/10B41J35/28
    • A ribbon feed device for a ribbon in a cartridge, comprises means for supporting the cartridge with spools therein engaged on hubs of the device, guide means for guiding a length of ribbon looped out of the cartridge, and a single control member operable from a normal position to an operated position to shift the guide means transversely of the length of the ribbon to a position of greater accessibility for fitting the ribbon therein. The ribbon feed device is capable of accepting either an inked ribbon cartridge or a carbon coated cartridge and includes a pair of sensing levers urged by a spring adapted to sense the inked ribbon wound on the two spools respectively through apertures in the inked ribbon cartridge and to control means for effecting reversal of the movement of the inked ribbon. Moreover, the feed mechanism includes a feed roller and counter-roller for unidirectionally feeding the carbon coated ribbon. The control member withdraws the sensing levers from contact with the ribbon and the counter-roller from the feed roller. The inked ribbon cartridge includes a first aperture enabling the sensing levers to contact the inked ribbon wound on the two spools and a second aperture in which the feed roller and the counter-roller are freely rotatable, externally to the path of the inked ribbon in the cartridge. The carbon coated ribbon cartridge includes an aperture which engages the sensing levers and sets the mechanism to wind in the corresponding spool the ribbon fed thereto from the feed roller and counter-roller.
    • 8. 发明专利
    • IT1036483B
    • 1979-10-30
    • IT6879075
    • 1975-07-10
    • OLIVETTI & CO SPA
    • B41J32/00B41J33/46B41J33/512B41J35/28B41J
    • An inked ribbon cartridge is removably mountable in a printing machine of the type comprising a support for the cartridge, two transport elements engageable with two spools, respectively, of the cartridge around which the ribbon is wound, two sensing elements for sensing the amount of the ribbon wound on the two spools, respectively, of the cartridge, a ribbon movement reversing mechanism controlled by the sensing elements for determining the direction of the rotation of the two shafts, and a control element for shifting the sensing elements from an operative position in which they sense the ribbon to an inoperative position in which they are disengaged from the spools. The cartridge comprises on a bottom part thereof at least one aperture for access of the sensing elements to the two spools and an opposing part arranged so to co-operate with the control element for the sensing elements as to cause them to shift from the inoperative position to the operative position when the cartridge is mounted on the support of the machine and from the operative position to the inoperative position when the cartridge is removed from said support.