Claims
- 1. In a device for feeding sheets to a fed machine, said device having stationary conveying rollers that rotate continuously at the same peripheral speed as receiving rollers of the fed machine and gripper devices which reciprocate toward and away from the conveying rollers, the improvement comprising:
- A. crank means for driving the gripper devices from the conveying rollers in a reciprocating motion such that the gripper devices accelerate said sheets to about the peripheral speed of the conveying rollers; and
- B. clutch means connected between the continuously rotating conveying rollers and the crank means for the reciprocating gripper devices for engaging said crank means in time sequence with said fed machine, said clutch means being actuated in said time sequence by a rotating cam driven in timed relationship with said fed machine and a cam follower having an end for contacting the rotating cam and an actuating end for mechanically actuating the clutch means, said cam follower being pivoted between said ends.
- 2. The improvement set forth in claim 1 in which the clutch means is a roller clutch.
- 3. The improvement set forth in claim 1 in which the clutch means is an electromagnetic clutch.
- 4. The improvement set forth in claim 1 wherein there are two sets of said gripper devices which alternately move toward and away from said conveying rollers, said sets of gripper devices being driven by a double lever crank.
- 5. The improvement set forth in claim 1 wherein said cam follower acts as a ratcheting mechanism for the clutch means.
- 6. The improvement as set forth in claim 1 wherein the gripper devices comprise suction cups.
Priority Claims (1)
Number |
Date |
Country |
Kind |
2434625 |
Jul 1974 |
DT |
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RELATED APPLICATION
This application is a continuation-in-part of U.S. Pat. application Ser. No. 531,684 filed Dec. 11, 1974, now abandoned.
US Referenced Citations (6)
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
531684 |
Dec 1974 |
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