Slitter with translating cutting devices
View Patent ↗Apparatus for cutting a moving receiver includes a plurality of cutting devices and a transport mechanism for selectively moving the cutting devices perpendicular to the feed direction of the receiver. Each cutting device includes two parallel cutting wheels and a pressure wheel arranged so that the cutting wheels are pressed laterally against the pressure wheel to form two cutting areas and a chad area arranged laterally between the cutting areas. A drive mechanism rotates the cutting wheels or pressure wheel of two or more of the cutting devices so that the rotating cutting wheels engage the moving receiver to cut the moving receiver parallel to its feed direction. A controller receives a job specification including two or more specified cut locations and causes the transport mechanism to laterally position two or more of the cutting devices to cut the moving receiver in the specified cut locations.
1. Apparatus for cutting a moving receiver comprising:
a. a plurality of cutting devices, each comprising two parallel cutting wheels and a pressure wheel arranged so that the cutting wheels are pressed laterally against the pressure wheel to form two cutting areas and a chad area arranged laterally between the cutting areas;
b. a drive mechanism for rotating the cutting wheels or pressure wheel of two or more of the plurality of cutting devices so that the rotating cutting wheels engage the moving receiver to cut the moving receiver parallel to its feed direction in the cutting areas, whereby one or more chads are cut out of the receiver;
c. a transport mechanism for selectively moving the plurality of cutting devices perpendicular to the feed direction of the receiver; and
d. a controller for receiving a job specification including two or more specified cut locations and causing the transport mechanism to laterally position two or more of the plurality of cutting devices to cut the moving receiver in the specified cut locations.
2. The apparatus according to claim 1 , wherein a surface of the pressure wheel of each of the plurality of cutting devices is harder than a surface of the cutting wheels.
3. The apparatus according to claim 1 , wherein the pressure wheel of each of the plurality of cutting devices is harder than the cutting wheels.
4. The apparatus according to claim 1 , wherein the drive mechanism rotates the cutting wheels, further comprising:
e. A shaft on which the cutting wheels are mounted and along which the transport mechanism selectively moves the cutting wheels.
5. The apparatus according to claim 4 , wherein the shaft extends beyond the edge of the receiver and the transport mechanism is adapted to move at least one of the cutting devices beyond the edge of the receiver.
6. The apparatus according to claim 1 , wherein the drive mechanism rotates the pressure wheels of two or more of the plurality of cutting devices, further comprising:
e. a shaft on which the pressure wheels are mounted and along which the transport mechanism selectively moves the pressure wheels.
7. The apparatus according to claim 6 , wherein the shaft extends beyond the edge of the receiver and the transport mechanism is adapted to move at least one of the plurality of cutting devices beyond the edge of the receiver.
8. The apparatus according to claim 1 , further including a friction member disposed between the cutting wheels of one of the plurality of cutting devices and adapted to draw the receiver through the plurality of cutting devices.
9. The apparatus according to claim 8 , wherein the friction member and the pressure wheel of the corresponding cutting device form a nip through which the moving receiver is drawn.
10. The apparatus according to claim 1 , wherein the circumferential speed of the cutting wheels is at most 15% greater than the speed of the receiver in its feed direction.
11. The apparatus according to claim 1 , wherein at least one of the plurality of cutting devices includes a deflector laterally disposed in the chad area of the at least one of the plurality of cutting devices and extending through the plane of the receiver, so that the deflector engages the chad as the receiver moves and directs the chad away from the feed direction of the receiver.