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1. 发明授权

US3931929A Tape perforator 失效
标题翻译：胶带穿孔机
公开(公告)号：US3931929A
公开(公告)日：1976-01-13
申请号：US557230
申请日：1975-03-10
申请人： Leon N. Canick , Charles S. Aldrich
发明人： Leon N. Canick , Charles S. Aldrich
IPC分类号： G06K1/02
CPC分类号： G06K1/02
摘要： The present disclosure is particularly directed to means that will slow down the operation of the tape perforating apparatus during the time intervals when the fulcrum levers must either travel into place or withdraw themselves from underneath of the lift levers in order to create more time for the critical transfer to take place. The present invention utilizes a double-ended bellcrank instead of the crank link disclosed in the aforementioned patent. As the main drive shaft rotates, the upper end of the bellcrank travels through an elliptical path that creates a partial dwell in the travel of the cradle when the front end of the cradle is near its low position. A partial dwell therefore occurs at the rear end of the lift levers at the critical transfer position.
摘要翻译：本公开特别涉及在支点杆必须行进到位或者从升降杆的下方退出的时间间隔期间将减慢带穿孔装置的操作的装置，以便为关键的转移发生。本发明采用双端曲拐而不是上述专利中公开的曲柄连杆。当主驱动轴旋转时，曲拐的上端行进通过椭圆形路径，当摇架的前端靠近其低位置时，该椭圆形路径在托架的行进中产生局部驻留。因此，在临界转移位置的升降杆的后端处发生局部停留。

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