Device and method for placing a roll against/removing it from a printing press
AssigneeWIFAG Maschinenfabrik AG
InventorsAndres Miescher, Andreas Zahnd
Life of this patent
Estimating the term…
Abstract
A device is provided for engaging and/or disengaging a roller with or from a first mating roller. The device includes a second mating roller, with which the roller is engaged, and with a basic unit, with which the roller can be moved to or away from the first mating roller in the circumferential direction of the second mating roller. A process for engaging and/or disengaging a roller of a printing press with or from a first mating roller is provided wherein the roller is engaged with a second mating roller and the roller is guided in the circumferential direction of the second mating roller in the state in which it is engaged with the second mating roller.
Claims19
A device for engaging and/or disengaging a roller with or from a first mating cylinder, with a second mating cylinder having a circumferential surface defining a second mating cylinder circumferential direction and defining a tangential direction to said circumferential direction, with which the roller is engaged, the device comprising:
- a feed unit, said roller being mounted on said feed unit;
- a basic unit connected to said roller via said feed unit, said basic unit guiding said roller together with said feed unit in a direction parallel to said tangential direction of said second mating cylinder such that said basic unit moves said roller from a first position to a second position, said roller continuously engaging the second mating cylinder when said basic unit moves said roller from said first position to said second position, said roller being in contact with the first mating cylinder and the second mating cylinder in said second position, said roller being in contact with the second mating cylinder when said roller is in said first position, said roller being at a spaced location from the first mating cylinder when said roller is in said first position, said feed unit being positioned in a bisecting line position with a rotational axis between the first mating cylinder and the second mating cylinder when said roller is in said second position, said feed unit generating engaging pressure with which said roller acts approximately uniformly on the first mating cylinder and the second mating cylinder when said feed unit is in said bisecting line position such that a nip ratio between the first mating cylinder and the second mating cylinder is substantially equal.
A process for engaging and/or disengaging a roller of a printing press with or from a first mating roller, wherein the roller is engaged with a second mating roller, the process comprising the steps of:
- guiding the roller in the circumferential direction of the second mating roller in the state in which the roller is engaged with the second mating roller;
- mounting a feed unit to said roller;
- moving the roller with said feed unit in a direction tangential to an outer surface of the second mating roller such that the roller moves from a first mating roller position to a second mating roller position, said roller being in contact with the first mating roller and said second mating roller when said roller is in said second mating roller position, said roller being in contact with said second mating roller when said roller is in said first mating roller position, said feed unit having a rotational axis, said rotational axis of said feed unit bisecting an angle defined between a rotational axis of the first mating roller and a rotational axis of the second mating roller when said roller is in said second position, said feed unit generating an engaging pressure when said roller is in said second mating position such that said roller applies a uniform pressure on the first mating cylinder and the second mating cylinder, wherein a nip ratio between the first mating cylinder and the second mating cylinder is approximately equal when said roller is in said second mating position.
A printing press system, comprising:
- a first mating roller having a first mating roller rotational axis;
- a second mating roller having a circumferential surface defining a second mating roller tangential direction, said second mating roller having a second mating roller rotational axis;
- an engagement roller for engaging and/or disengaging with or from the first mating roller and for engagement with the second mating roller;
- a basic unit, said basic unit moving said engagement roller to or away from the first mating roller in the circumferential direction of the second mating roller, said basic unit being adjustable in position such that said basic unit moves said engagement roller in a direction parallel to said second mating roller tangential direction from a first roller position to a second roller position;
- a feed unit mounted to said engagement roller, said feed unit having a feed unit rotational axis, said feed unit rotational axis bisecting an angle between said first mating roller rotational axis and said second mating roller rotational axis when said engagement roller is in said second roller position, said feed unit generating a roller engaging pressure, said roller applying said roller engaging pressure uniformly to said first mating roller and said second mating roller such that a nip ratio between said first mating roller and said second mating roller is substantially equal.
Dependencies are inferred from the claim text.