| 摘要 |
<p>In a press feeder control a main counter is provided for initially manifesting a quantity representative of the distance travelled by a web as it is drawn into position in relation to a press, and decremented in response to each incremental movement of such web, so that it is decreased to zero as the web is moved to the proper position. The drive of the web is controlled to accelerate the web at a preselected rate until a preselected velocity is obtained, and to decelerate the web at the same preselected rate so as to bring the web to the desired position as the velocity of the web is reduced to zero. Means is provided for selectively driving the out-feed drive at a faster rate than the in-feed drive, to stretch the web in the vicinty of the press.</p> |
