公开(公告)号：US4693619A

公开(公告)日：1987-09-15

申请号：US790502

申请日：1985-10-23

申请人： Hidekazu Ishii ,  Chihiro Kosaka

发明人： Hidekazu Ishii ,  Chihiro Kosaka

IPC分类号： B41J35/10 ,  B41J35/14

CPC分类号： B41J35/14

摘要： A positioning device for a printer for driving a ribbon base on which a ribbon cassette is carried by means of a stepping motor to position a ribbon to any of predetermined shift positions. The device includes a stopper for defining a home position of the ribbon cassette, and a power transmitting mechanism for transmitting a power of the stepping motor to the ribbon base. The power transmitting mechanism includes therein a torque limiter which yields a slip therein when a torque lower than a pull-out torque of the stepping motor is applied thereto. Accordingly, when the ribbon cassette is abutted with the stopper, the stepping motor is allowed to continue rotation thereof without stepping out by the torque limiter, thereby preventing an out-of-phase condition of the stepping motor at a stopped position thereof. Consequently, upon subsequent operation, the ribbon cassette can be shifted accurately, and hence color mixture in printing can be eliminated.

摘要翻译： 一种打印机的定位装置，用于驱动色带基座，借助于步进电机将色带盒承载在其上，以将色带定位到任何预定的位移位置。 该装置包括用于限定色带盒的原始位置的止动器和用于将步进电机的功率传送到色带底座的动力传递机构。 动力传递机构包括转矩限制器，当施加低于步进电动机的拉出转矩的转矩时，转矩限制器在其中产生滑动。 因此，当色带盒与止动器抵接时，允许步进电机继续旋转，而不会由转矩限制器跳出，从而防止步进电机在其停止位置的异相状态。 因此，在随后的操作中，可以精确地移动色带盒，从而可以消除印刷中的混色。

公开(公告)号：USD280912S

公开(公告)日：1985-10-08

申请号：US500983

申请日：1983-06-03

申请人： Chihiro Kosaka

设计人： Chihiro Kosaka

公开(公告)号：US4974680A

公开(公告)日：1990-12-04

申请号：US432052

申请日：1989-11-06

申请人： Hideaki Nishida ,  Chihiro Kosaka ,  Takeshi Hiyoshi ,  Tadashi Sugiyama

发明人： Hideaki Nishida ,  Chihiro Kosaka ,  Takeshi Hiyoshi ,  Tadashi Sugiyama

IPC分类号： B41J13/02 ,  B65H5/06 ,  B65H27/00 ,  F16C13/00

CPC分类号： B65H27/00 ,  B41J13/025 ,  B65H5/062 ,  F16C13/00 ,  B65H2404/133 ,  B65H2404/14 ,  B65H2404/144 ,  B65H2404/185 ,  B65H2511/22 ,  B65H2511/224

摘要： A sheet-feeding mechanism comprises feed rollers attached to a first driving shaft and spaced from each other by a predetermined distance, two of the feed rollers being end feed rollers located at both ends of the first driving shaft. A pair of end ball rollers are attached to a second driving shaft and located in correspondence to the end feed rollers. A double-structure bail roller is attached to the second driving shaft in correspondance to the feed rollers, except for the end feed rollers. The double-structure bail roller includes an inner core and an outer layer having a small friction coefficient. The iner core is elastically deformable in a direction in which the end feed rollers are pressed against the corresponding bail rollers.