| 摘要 |
<p>Punched cards useful in controlling a variety of automatons, e.g. automatic printing machines, etc., can be rapidly removed by the device which has pockets to receive the punched cards. The pockets are U-shaped and have one short arm and one long one, and the long arm is somewhat lower in height than the short one, the latter having protruding ends and upright plates to receive these. The plates have groove-like folds underneath in which the short arms can be introduced. The pockets may be made of PVC.</p> |
