| 摘要 |
A pneumatic stock feeder for punch presses and the like, said feeder having an improved fluid actuating and control system. The feeder is provided with a stock gripping fluid motor means and a feed slide actuating fluid motor means; which fluid motor means are adapted to be controlled by an improved four-way slide valve arrangement. The slide valve includes a flat plate surface on which is disposed a recesses valve cup or pad that is laterally translatable between two operative valving positions. The recesses valve cup has a flat valving surface formed thereon that slidably engages said flat plate surface and valvingly cooperates with at least three ports formed in said flat plate surface so as to thereby control the operation of said fluid motor means. A control plunger and an associated coupling means are adapted to laterally shift said valve pad between its two operative positions in response to the movement of the ram of said punch press.
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