Washing device for impression cylinders

Claim 2

In a washing device for an impression cylinder of a printing machine comprising a washing roller capable of being brought into contact with and liftable away from a cylinder jacket surface of the impression cylinder in the vicinity of a gripper bridge of the impression cylinder, and being sprayable with cleaning solution, the washing roller comprising a washing brush extending over substantially the entire length of the impression cylinder and being separately driven, the washing roller being rotatable in a direction opposite the direction of rotation of the impression cylinder and being rotatable at a higher speed than the rotating speed of the impression cylinder, and wherein the washing roller is movable automatically into its contact with the impression cylinder.

Claim 3

In a washing device as claimed in claim 1, wherein said washing brush is shaped slightly convex.

Claim 4

In a washing device as claimed in claim 1, wherein the washing brush is arranged in a collector trough only open towards the jacket surface of the impression cylinder and is rotatable in a manner that, in an adjusted contact position of the washing brush, bristle tips of the washing brush are in intensive contact with the jacket surface of the impression cylinder.

Claim 5

In a washing device as claimed in claim 3, wherein said spring means comprise a plurality of spray nozzles for applying washing solution to the washing brush during the washing procedure, said spray nozzles being arranged in said collecting trough, parallel to the washing brush and spaced at regular intervals from one another.

Claim 6

In a washing device as claimed in claim 3, including a yieldable adjusting device through the intermediary of which said collecting trough is movable into operational proximity with the impression cylinder.

Claim 7

In a washing device as claimed in claim 1, including an adjustment element mounted on said gripper bridge of the impression cylinder, said adjusting element interacts with a setting element acting on said wash brush wherein in the set contact position, the washing brush is raised over the gripper bridge.

Claim 8

In a washing device as claimed in claim 5, including means for pneumatically operating said yieldable adjusting device.

Claim 9

In a washing device as claimed in claim 3, including a doctor blade fixed in said collector trough in the area of said bristle tips.

Claim 10

In a washing device as claimed in claim 1, including a motor firmly bolted to a frame wall of the printing machine which provides a separate drive of the washing brush, said motor having a spur gear drive train, with one of the gears being mounted on the shaft of the washing brush and another spur gear secured on the motor shaft.

Claim 11

In a washing device as claimed in claim 9, wherein the intermediate spur gear between the washing brush and the spur gear connected to the motor has a shaft on which an end of a respective bearing lever is mounted so as to be pivotable about the axis of the intermediate spur gear, the other end of the respective bearing lever being likewise rotatably mounted on said shaft of the washing brush, said bearing lever having a surface facing towards the impression cylinder and formed as a cam cooperatively engageable with a support roller mounted on the gripper shaft of the gripper bridge carried by the impression cylinder.

Claim 12

In a washing device as claimed in claim 9, wherein said motor has a base bracket whereon a bearing bracket is mounted, and including a pneumatic brush setting device, basically comprising a piston and a cylinder pivotally linked to said bearing bracket and adjustable into two end positions, said setting device including a control rod connected at one end to said piston and at the other end articulatingly to said collecting trough.

Claim 13

In a washing device as claimed in claim 3, wherein said collector trough includes a drain in the base thereof for draining of washing solution.

Claim 14

In a washing device as claimed in claim l, including an electronic control device in combination with a selection system by means of which the number of impression cylinders to be cleaned can be preselected.

Claim 15

In a washing device for an impression cylinder of a printing machine having an impression cylinder with a gripper bridge, a washing roller, means for bringing the washing roller into contact with and for lifting the washing roller away from a cylindrical jacket surface of the impression cylinder in vicinity of a gripper bridge of the impression cylinder, and means for spraying the washing roller with cleaning solution, the washing roller comprising a washing brush extending over substantially the entire length of the impression cylinder, means for driving the washing roller independently of the impression cylinder so that the washing roller is rotatable in the same direction of rotation as, but at a higher speed than that of the impression cylinder and so that respective mutually opposing adjacent locations of said washing brush and said cylindrical jacket surface are travelling in opposite directions, and means for moving the washing roller automatically into its contact with the impression cylinder, said means for driving the washing roller comprising a motor firmly mounted on a frame wall of the printing machine, said motor having a shaft journal whereon a drive spur gear is fastened, said drive spur gear meshing, via two intermediate spur gears, with a spur gear fixed to a shaft of the washing brush for driving the brush, said intermediate spur gear immediately following said motor having a shaft; on which an end of a respective bearing lever is mounted so as to be pivotable about the axis of said last-mentioned intermediate spur gear, the other end of the respective bearing lever being likewise rotatably mounted on said shaft of the washing brush, said bearing lever having a surface facing towards the impression cylinder and formed as a cam cooperatively engageable with a support roller mounted on the gripper shaft of the gripper bridge carried by the impression cylinder.

Claim 16

In a washing device for an impression cylinder of a printing machine having an impression cylinder with a gripper bridge, a washing roller, means for bringing the washing roller into contact with and for lifting the washing roller away from a cylindrical jacket surface of the impression cylinder in vicinity of a gripper bridge of the impression cylinder, and means for spraying the washing roller with cleaning solution, the washing roller comprising a washing brush extending over substantially the entire length of the impression cylinder, means for driving the washing roller independently of the impression cylinder so that the washing roller is rotatable in the same direction of rotation as, but at a higher speed than that of the impression cylinder and so that respective mutually opposing adjacent locations of said washing brush and said cylindrical jacket surface are travelling in opposite directions, and means for moving the washing roller automatically into its contact with the impression cylinder, said means for driving the washing roller comprising a motor firmly mounted on a frame wall of the printing machine, said motor having a shaft journal whereon a drive spur gear is fastened, said drive spur gear meshing, via two intermediate spur gears, with a spur gear fixed to a shaft of the washing brush for driving the brush, said intermediate spur gear immediately following said motor having a shaft; on which an end of a respective bearing lever is mounted so as to be pivotable about the axis of said last-mentioned intermediate spur gear, the other end of the respective bearing lever being likewise rotatably mounted on said shaft of the washing brush, said bearing lever having a surface facing towards the impression cylinder and formed as a cam cooperatively engageable with a support roller mounted on the gripper shaft of the gripper bridge carried by the impression cylinder.

Claim 17

Washing device according to claim 14, wherein the washing brush is slightly cambered.

Claim 18

Washing device according to claim 14, wherein the washing brush is arranged in a collecting trough open only towards the jacket surface of the impression cylinder and is rotatable in a manner that, in an adjusted contact position of the washing brush, bristle tips of the washing brush are in intensive contact with the jacket surface of the impression cylinder.

Claim 19

Washing device according to claim 16, wherein said spraying means comprise a plurality of spray nozzles for applying washing solution to the washing brush during a washing operation, said spray nozzles being arranged in said collecting trough, parallel to the washing brush and spaced at regular intervals from one another.

Claim 20

Washing device according -to claim 16, including a yieldable adjusting device through the intermediary of which said collecting trough is movable into operational proximity with the impression cylinder.

Claim 21

Washing device according to claim 18, including means for pneumatically operating said yieldable adjusting device.

Claim 22

Washing device according to claim 16, including a wiper fixed in said collecting trough in vicinity of said bristle tips.

Claim 23

Washing device according to claim 16, wherein said collecting trough has a bottom wall wherein a drain for used washing solution is located.

Claim 24

Washing device according to claim 14, wherein said motor has a base bracket whereon a bearing bracket is mounted, and including a pneumatic brush setting device, basically comprising a piston and a cylinder, pivotally linked to said bearing bracket and adjustable into two end positions, said setting device including a control rod connected at one end to said piston and at the other end articulatingly to said collecting trough.