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公开(公告)号：US4746235A
公开(公告)日：1988-05-24
申请号：US918965
申请日：1986-10-15
申请人： Hans W. Mueller , Kenneth D. Vought
发明人： Hans W. Mueller , Kenneth D. Vought
摘要： The present invention includes means for maintaining a printing element in its home position without any accompanying noise and for thereafter moving the carrier to its left margin position after the power switch is turned on. A latch member controlled by an actuator engages a notch in a flange of a rotating printing element drive gear for establishing the home position of the printing element. When the latch member engages the flange, the printing element drive gear motor is deenergized, stopping rotation of the drive gear, and the noise which would otherwise be caused by the print element drive motor continuously trying to rotate against the latch member is eliminated.
摘要翻译： 本发明包括用于将印刷元件保持在其初始位置而没有任何伴随噪声的装置，并且此后在电源开关接通之后将载体移动到其左边距位置。 由致动器控制的闩锁构件接合旋转印刷元件驱动齿轮的凸缘中的凹口，以建立打印元件的原始位置。 当闩锁构件接合凸缘时，打印元件驱动齿轮电动机被断电，停止驱动齿轮的旋转，并且否则由打印元件驱动电动机连续地试图相对于闩锁构件旋转引起的噪声被消除。
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公开(公告)号：US1751761A
公开(公告)日：1930-03-25
申请号：US24053127
申请日：1927-12-16
申请人： ALBERT RODRIAN
发明人： ALBERT RODRIAN
IPC分类号： B41J7/96
CPC分类号： B41J7/96 , Y10T29/53978
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公开(公告)号：US4685816A
公开(公告)日：1987-08-11
申请号：US805681
申请日：1985-12-06
申请人： Ali T. Mazumder , Brian M. Fairey
发明人： Ali T. Mazumder , Brian M. Fairey
摘要： An impact-type, printing apparatus which is readily adjusted to enable the impact face of the associated print hammer to be precisely located with reference to the plane of a character (or a typewheel) to be printed to enable printing in special fonts like E13-B. First and second eccentric members and a separate moveable member are used to provide the adjustments necessary for the precise location of the impact face.
摘要翻译： 一种冲击式打印装置，其易于调整以使相关打印锤的冲击面相对于要打印的字符（或打字纸）的平面精确定位，以使得能够以特殊字体（例如E13- B. 使用第一和第二偏心构件和单独的可移动构件来提供冲击面的精确位置所需的调整。
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公开(公告)号：US4027764A
公开(公告)日：1977-06-07
申请号：US698313
申请日：1976-06-22
申请人： Toshio Kashio
发明人： Toshio Kashio
CPC分类号： B41J7/96 , Y10S24/909 , Y10S400/903
摘要： An apparatus for confirming the correct impression of printing characters wherein any of the characters arranged in at least one line circumferentially extending on the peripheral surface of a cylindrical printing drum is designated by controlling the operation of the printing drum to be brought to a prescribed printing position on the surface of the recording medium for printing and the printing drum can be moved in the axial direction, and which comprises a detector for detecting a circumferential angle defined by the position of the selected one of said linearly arranged characters with a point of referential angle provided on the rotating printing drum; a counter for counting signals denoting the steps of the rotation of said printing drum required for said selected character to take a desired printing position; and a comparison circuit for comparing a number of rotation steps required for the printing drum to return to the point of a referential angle after impression of one line of characters on a recording medium is brought to an end and a number of rotation steps required for the printing drum to run through a circumferential angle defined by the position of the terminal character of the respective lines impressed on the recording medium with the referential angle point, thereby finding an error, if any, occurring in impressing the respective lines on the recording medium.
摘要翻译： 一种用于确认打印字符的正确印象的装置，其中通过控制打印鼓到达规定打印位置的操作来指定在圆柱形印刷鼓的圆周表面上周向延伸的至少一行中布置的任何字符 在用于打印的记录介质的表面上，并且印刷滚筒可沿轴向移动，并且其包括用于检测由所选择的一个所述线性排列的字符的位置限定的圆周角的检测器，其具有参考点 设置在旋转印刷鼓上; 计数器，用于计数表示所述所选字符所需的所述打印鼓旋转的步骤以采取期望的打印位置的信号; 并且比较电路，用于比较在记录介质上的一行字符的印象之后印刷鼓返回到参考角所需的旋转步数的数量结束，并且为 印刷滚筒以由参考角度点印在记录介质上的相应线的端子字符的位置限定的圆周角度延伸，从而发现在记录介质上印刷各行时发生的错误（如果有的话）。
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公开(公告)号：US2984327A
公开(公告)日：1961-05-16
申请号：US84308559
申请日：1959-09-29
申请人： ROYAL MCBEE CORP
发明人： HOLLAND JOHN H
IPC分类号： B41J7/96
CPC分类号： B41J7/96
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公开(公告)号：US4595935A
公开(公告)日：1986-06-17
申请号：US640894
申请日：1984-08-14
摘要： A system and method are disclosed for automatically detecting any defective elements in a linear array of thermal printhead elements of a thermal printer and for automatically correcting for at least one defective thermal printhead element. In a preferred embodiment of the invention an ON/OFF line from a microprocessor is turned OFF to turn off a voltage regulator, thereby preventing the thermal printhead elements from printing. With the voltage regulator OFF, a diode is forward biased to enable a voltage divider to be formed between a sensing resistor and any one of the thermal printhead elements that is activated at any given time. When a subsequent sense voltage (or resistance measurement) of an element exceeds the value of the initial reference sense voltage for that by a predetermined amount, that element is detected as a defective element. A software subroutine, in the microprocessor is then utilized to change the position of serial data bits carrying data to be printed such that the detected defective thermal element is not utilized during a normal printing operation.
摘要翻译： 公开了一种用于自动检测热敏打印机的热打印头元件的线性阵列中的任何缺陷元件并且用于自动校正至少一个有缺陷的热打印头元件的系统和方法。 在本发明的优选实施例中，来自微处理器的ON / OFF线被关断以关闭电压调节器，从而防止热打印头元件的打印。 在电压调节器关闭的情况下，二极管被正向偏置，以便在感测电阻和任何一个在任何给定时间被激活的热敏打印头元件之间形成一个分压器。 当元件的后续感测电压（或电阻测量）超过预定量的初始参考感测电压的值时，该元件被检测为缺陷元件。 然后利用微处理器中的软件子程序改变携带要打印的数据的串行数据位的位置，使得在正常打印操作期间未使用检测到的有缺陷的热元件。
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公开(公告)号：US4398837A
公开(公告)日：1983-08-16
申请号：US361063
申请日：1982-03-23
申请人： Hiroshi Torii , Masaharu Mori
发明人： Hiroshi Torii , Masaharu Mori
摘要： A printing apparatus comprising a print wheel having a multiplicity type elements, and a detecting unit for detecting angular positions of the print wheel including its fixed home position. The apparatus further comprises a control unit which includes a first counter which stores data representative of an angular distance of a type element currently located at the printing position as measured from the home position, and a second counter which stores data representative of an angular position of a type element designated by a print signal. Both counters are operated as they receive position signals from the detecting unit. The control unit is so arranged that in the event of an unexpected rotation of a wheel driving rotary shaft which is not a result of the actuation of a wheel driving motor in response to the print signal, the print wheel is first reset to the home position before it is rotated to bring a designated type element to the printing position, whereby chances for printing errors due to such unexpected rotation are eliminated. A method for controlling to prevent the printing errors is also disclosed.
摘要翻译： 一种打印装置，包括具有多种类型元件的打印轮，以及用于检测包括其固定原位的打印轮的角位置的检测单元。 该装置还包括控制单元，该控制单元包括第一计数器，该第一计数器存储表示从原始位置测量的当前位于打印位置处的类型元素的角距离的数据;以及第二计数器，其存储表示 由打印信号指定的类型元素。 当两个计数器从检测单元接收到位置信号时，它们都被操作。 控制单元被布置成使得在轮驱动旋转轴意外旋转的情况下，不是由于打印信号而引起的车轮驱动电动机的结果，所以打印轮首先被复位到原始位置 在旋转以将指定类型的元件带到打印位置之前，由此消除了由于这种意外旋转引起的打印错误的机会。 还公开了一种防止打印错误的控制方法。
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公开(公告)号：US4291620A
公开(公告)日：1981-09-29
申请号：US78727
申请日：1979-09-25
申请人： Hitoshi Yamasaki , Yasutaka Iwawaki
发明人： Hitoshi Yamasaki , Yasutaka Iwawaki
CPC分类号： B41J7/96
摘要： A digital printer of the print wheel controlling type comprising a timing signal generator for developing type selection controlling signals (.alpha.) for selecting a desired type mounted on the print wheel, and a wheel round detection signal (.beta.) for indicating a complete one round of the print wheel. A print control circuit is provided for detecting whether the wheel round detection signal (.beta.) is developed next after the development of the type selection controlling signals (.alpha.) by a predetermined number. If the wheel round detection signal (.beta.) is not developed at a preselected timing, the print control circuit learns an erroneous printing operation, and functions to conduct a corrected printing operation.
摘要翻译： 一种打印轮控制类型的数字打印机，包括用于显示用于选择安装在打印轮上的期望类型的类型选择控制信号（α）的定时信号发生器，以及用于指示完整的一轮的轮回检测信号 打印轮。 提供了一种打印控制电路，用于检测在类型选择控制信号（α）开发预定数量之后，轮回检测信号（β）是否被开发。 如果在预选定时没有产生轮回检测信号（β），则打印控制电路学习错误的打印操作，并且用于进行校正的打印操作。
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公开(公告)号：US4264220A
公开(公告)日：1981-04-28
申请号：US102792
申请日：1979-12-12
CPC分类号： B41J1/24 , B41J19/202 , B41J7/96
摘要： In a printwheel type of printer using a selection stepper motor for driving the printwheel, means are provided for performing printwheel homing operation upon occurrence of predetermined events. Such an event, is detected and reported to microprocessor means which drive motion means for bringing the printer carriage assembly to a first extreme left position where a stop element fixed relative to the printwheel rotation is made to enter the path of another stop element attached to rotate with the printwheel. Subsequently, the selection stepper motor driving the printwheel is driven for a number of steps at least equal to one motor revolution to ensure reaching inhibition of the printwheel rotation by bringing the rotating stop element into contact with the relatively fixed stop element. The carriage is then moved back to the left margin writing position where the relatively fixed stop element is withdrawn from the path of the other stop element and the angular printwheel home position is noted and stored by the microprocessor means.
摘要翻译： 在使用用于驱动打印轮的选择步进电机的打印轮型打印机中，提供用于在发生预定事件时执行打印轮归位操作的装置。 这种事件被检测并被报告给微处理器装置，微处理器装置驱动运动装置，以使打印机托架组件进入第一最左侧位置，其中相对于打印轮旋转固定的止动元件进入附接到旋转的另一个止动元件的路径 与打印轮。 随后，驱动打印轮的选择步进电动机被驱动至少等于一个电动机转数的数个步骤，以通过使旋转止动元件与相对固定的止动元件接触来确保达到对打印轮旋转的抑制。 然后将滑架移回到左边距书写位置，其中相对固定的止动元件从另一个止动元件的路径中撤出，并且角度打印轮原位被微处理器装置记录和存储。
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