VARIABLE CUTOFF IN A CUTTER FOLDER
A folder for a printing press includes a cutting cylinder assembly having at least two knife and anvil cylinder sets positioned near the cutting region of a folder. The cutting cylinder assembly slides or actuates one of the knife and anvil cylinder sets into a cutting position for a desired cut length. The web passes between the knife and anvil cylinder set and is cut. When the cut length needs to be changed, the assembly is relocated to such a position that a second or further set of knife and anvil cylinders is aligned with the web.
1 . A folder for a printing press comprising:
a movable assembly including
a first cutting cylinder pair including a first knife cylinder and a first anvil cylinder for cutting a web into signatures, and
a second cutting cylinder pair including a second knife cylinder and a second anvil cylinder for cutting the web into signatures;
the movable assembly supporting the first cutting cylinder pair and second cutting cylinder pair, the assembly movable to selectively position either the first cutting cylinder pair or the second cutting cylinder pair into a cutting position for cutting the web.
2 . The folder of claim 1 , wherein the movable assembly is movable perpendicular to a transport path of the web.
3 . The folder of claim 1 , further comprising one or more rails, and wherein the movable assembly is movable perpendicular to a transport path of the web on the one or more rails.
4 . The folder of claim 1 , further comprising a linear bearing or bushing, and wherein the movable assembly is movable perpendicular to a transport path of the web via the linear bearing or bushing.
5 . The folder of claim 1 , further comprising an actuator, the actuator coupled to the movable assembly, the actuator moving the movable assembly to selectively position either the first cutting cylinder pair or the second cutting cylinder pair into a cutting position for cutting the web.
6 . The folder of claim 5 , wherein the actuator is one of a hydraulic actuator, a pneumatic actuator, and a motor.
7 . The folder of claim 1 , further comprising:
a former, upstream of the movable assembly, arranged to impart a longitudinal fold to a web;
a plurality of guide belts, downstream of the movable assembly, the plurality of guide belts arranged to receive the cut web from the movable assembly;
wherein the moveable assembly is movable perpendicular to a web path of the web.
8 . The folder of claim 1 , wherein the first knife cylinder includes a first, second, third and fourth knife box positions, the first and third knife box positions equally spaced apart from each other around a circumference of the first knife cylinder, the first, second, and fourth knife box positions equally spaced apart from each other around the circumference.
9 . The folder of claim 8 , wherein the first anvil cylinder includes a first, second, third and fourth anvil positions, the first and third anvil positions equally spaced apart from each other around a circumference of the first anvil cylinder, the first, second, and fourth anvil positions equally spaced apart from each other around the circumference.
10 . The folder of claim 9 , wherein the second knife cylinder includes a first knife box and a second knife box equally spaced apart from each other around a circumference of the second knife cylinder, and the second anvil cylinder includes a first anvil and a second anvil equally spaced apart from each other around a circumference of the second anvil cylinder.
11 . The folder of claim 9 , wherein the first and third knife box positions each have removably secured therein a knife box, and the first and third anvil positions each have removably secured therein an anvil, wherein the first cutting cylinder pair provides four cuts for each revolution of a plate cylinder of the printing press.
12 . The folder of claim 9 , wherein the first, second and fourth knife box positions each have removably secured therein a knife box, and the first, second and fourth anvil positions each have removably secured therein an anvil, wherein the first cutting cylinder pair provides six cuts for each revolution of a plate cylinder of the printing press.
13 . The folder of claim 11 , further comprising a motor, the motor driving the first cutting cylinder pair.
14 to 20 . (canceled)