公开(公告)号：US4650351A

公开(公告)日：1987-03-17

申请号：US729023

申请日：1985-04-30

申请人： Vencil D. Engle ,  Cameron H. Hafer ,  Frank M. Hughes ,  Donald J. Steger ,  Edward G. Stewart ,  Ramon L. Street ,  John A. Thompson

发明人： Vencil D. Engle ,  Cameron H. Hafer ,  Frank M. Hughes ,  Donald J. Steger ,  Edward G. Stewart ,  Ramon L. Street ,  John A. Thompson

IPC分类号： B41J32/02 ,  B41J33/24 ,  B41J33/26 ,  B41M5/26 ,  B41J3/02 ,  B41J35/28

CPC分类号： B41J33/26

摘要： A thermal printer (10) has a thermal transfer medium (28) fed past a thermal printhead (21) at a substantially constant velocity by a feed roll (82) engaging the thermal transfer medium just prior to the printhead to maintain a portion of the thermal transfer medium between the printhead and the feed roll relatively stiff. The feed roll is mounted on a cartridge (30) having the thermal transfer medium supplied therefrom. A drag brake (70) is disposed in the feed path of the thermal transfer medium prior to the feed roll to cause a substantially constant premetering tension to be applied to the thermal transfer medium irrespective of the coefficient of friction between the drag brake and the thermal transfer medium. A carrier (14), which supports the printhead and a feed roll driver (90), is driven separately from the feed roll driver so that various ratios between the velocities of the thermal transfer medium and the carrier are obtained to produce various print qualities. One print quality occurs in a draft mode, which is a relatively high speed, in which there is substantial conservation of the thermal transfer medium. The peel angle of the thermal transfer medium from a recording medium (12) on which printing occurs is maintained at a relatively low angle to increase the contact time between the thermal transfer medium and the recording medium.

摘要翻译： 热敏打印机（10）具有热传递介质（28），其通过刚好在打印头之前与热转印介质接合的进给辊（82）以基本恒定的速度被馈送通过热打印头（21），以保持一部分 打印头和进料辊之间的热转印介质相对较硬。 进料辊安装在其上提供有热转印介质的盒（30）上。 拖曳制动器（70）设置在进给辊之前的热转印介质的进给路径中，以使得将基本上恒定的预测张力施加到热转印介质上，而不管拖曳制动器和热量传感器之间的摩擦系数如何 转移介质。 支撑打印头和进料辊驱动器（90）的载体（14）与进料辊驱动器分开地驱动，使得获得热转印介质和载体的速度之间的各种比率以产生各种打印质量。 一个打印质量发生在一个相对较高的速度的牵伸模式中，其中存在大量的热转印介质的保存。 来自记录介质（12）的热转印介质的剥离角度保持在相对低的角度，以增加热转印介质和记录介质之间的接触时间。

公开(公告)号：US5525979A

公开(公告)日：1996-06-11

申请号：US514938

申请日：1995-08-14

申请人： Vencil D. Engle ,  Andrew C. Hogan ,  Larry E. Stahlman

发明人： Vencil D. Engle ,  Andrew C. Hogan ,  Larry E. Stahlman

IPC分类号： H01H13/702 ,  H03K17/94

CPC分类号： H01H13/702 ,  H01H2215/006 ,  H01H2227/036 ,  H01H2233/016

摘要： A low-profile keyboard (5) each switch (3) having a dished keybutton (3) held upward by a rubber dome (49) and having ribs (55) which depress extension (43 and 31) which carry electrical traces (45 and 33) to activate the switch. The assembly is mounted on post (15). A lower recess (21) permits excess travel to a quiet stop. The rubber sheet (47) provides spill resistance.

摘要翻译： 每个开关（3）的低调键盘（5）具有由橡胶圆顶（49）向上保持的碟形按键（3），并具有压制延伸部（43和31）的肋（55） 33）激活开关。 组件安装在柱（15）上。 下部凹口（21）允许过多的行程到一个安静的停止。 橡胶片（47）提供防溢出性。

公开(公告)号：US4221489A

公开(公告)日：1980-09-09

申请号：US957942

申请日：1978-11-06

申请人： Vencil D. Engle ,  Raymond M. Marowski ,  Edward E. Pollard ,  John L. Pullen

发明人： Vencil D. Engle ,  Raymond M. Marowski ,  Edward E. Pollard ,  John L. Pullen

IPC分类号： B41J13/02 ,  B41J13/036 ,  B41J13/076

CPC分类号： B41J13/036 ,  B41J13/076

摘要： A paper feed roll assembly is disclosed which is pivotally mounted on a central point with three degrees of freedom of movement. The feed rolls are engageable with the periphery of the platen. Additionally, the support for the paper feed rolls is deflectable about the central point by a feed roll release member to effect the withdrawal of the feed rolls from the periphery of the platen to enhance paper insertion and removal. The pivot point support provides for freedom of movement in the three necessary degrees of freedom to allow equilization of feed roll force against the platen and for alignment of the feed rolls with the periphery of the platen to insure proper paper feed. The feed roll truck frame, by virtue of its pivotal mounting, may be deflected downward to permit release or insertion of the paper. A deflection means or eccentric bar is disclosed for deflecting the truck member away from the periphery of the platen against the force of the pivot support acting toward the platen.

摘要翻译： 公开了一种供纸辊组件，其被枢转地安装在具有三个运动自由度的中心点上。 进料辊可与压板的周边接合。 此外，供纸辊的支撑件可以通过进给辊释放构件围绕中心点偏转，以使进给辊从压盘的周边退出以增强纸的插入和移除。 枢轴点支撑件提供三个必要自由度的运动自由度，以允许进给辊力相对于压板的等同化，并且用于使进给辊与压板的周边对准以确保适当的进纸。 进料辊车架由于其枢转安装而可能向下偏转以允许纸的释放或插入。 公开了一种偏转装置或偏心杆，用于使卡车构件克服着作用于压板的枢转支撑件的力而远离压板的周边。

公开(公告)号：US5268816A

公开(公告)日：1993-12-07

申请号：US951980

申请日：1982-09-28

申请人： William A. Abell, Jr. ,  Vencil D. Engle

发明人： William A. Abell, Jr. ,  Vencil D. Engle

IPC分类号： G06F1/16 ,  H05K7/16

CPC分类号： G06F1/162 ,  G06F1/1643 ,  G06F1/1671 ,  G06F1/1679 ,  G06F1/1683

摘要： A portable personal computer has a display screen movable between a substantially vertical position when a keyboard is in a substantially horizontal position and exposed for use and a substantially horizontal position in which the keyboard is not accessible or viewable but the display screen is accessible and viewable. In its substantially horizontal position, the display screen can be used as a book reading device or a pen based personal computer, for example. When the display screen is in its substantially horizontal position, function control buttons are accessible.

摘要翻译： 便携式个人计算机具有显示屏幕，当键盘处于基本水平的位置并且被暴露使用时，显示屏幕可在基本垂直的位置之间移动，并且基本上水平的位置，其中键盘不可访问或可观看，但是显示屏幕是可访问和可观看的。 在其基本水平的位置，例如，显示屏可以用作书本阅读装置或笔式个人计算机。 当显示屏处于其基本水平位置时，功能控制按钮可以访问。