Intaglio printing press with mobile carriage supporting ink-collecting cylinder

Patent metadata

Field	Value
Publication number	US-10414152-B2
Application number	US-201013518680-A
Country	US
Kind code	B2
Filing date	Dec 20, 2010
Priority date	Dec 22, 2009
Publication date	Sep 17, 2019
Grant date	Sep 17, 2019

Abstract

There is described an intaglio printing press comprising (i) a stationary machine frame (01) supporting an intaglio printing cylinder (07) and an impression cylinder (06) contacting the intaglio printing cylinder (07), (ii) an inking system (12, 13, 16) for inking the intaglio printing cylinder (07), which inking system (12, 13, 16) comprises an ink-collecting cylinder (12) designed to contact the intaglio printing cylinder (07) and at least one inking device (13, 16) for supplying ink to said ink-collecting cylinder (12), and (iii) at least a first mobile carriage (11) supporting the ink-collecting cylinder (12), which first mobile carriage (11) is adapted to be moved with respect to the stationary machine frame (01) between a working position where the ink-collecting cylinder (12) contacts the intaglio printing cylinder (07) and a retracted position where the ink-collecting cylinder (12) is retracted away from the intaglio printing cylinder (07). The axis of rotation of the ink-collecting cylinder (12) lies below a horizontal plane (P0) intersecting the axis of rotation of the intaglio printing cylinder (07) and a plane (P2) intersecting the axis of rotation of the ink-collecting cylinder (12) and the axis of rotation of the intaglio printing cylinder (07) forms, in the working position of the first mobile carriage (11), an acute angle (β) with respect to the horizontal plane (P0).

First claim

The invention claimed is:

1. An intaglio printing press comprising:
a stationary machine frame supporting an intaglio printing cylinder and an impression cylinder contacting the intaglio printing cylinder;
an inking system for inking the intaglio printing cylinder, which inking system comprises an ink-collecting cylinder designed to contact the intaglio printing cylinder and at least one inking device for supplying ink to the ink-collecting cylinder; and
at least a first mobile carriage supporting the ink-collecting cylinder, which first mobile carriage is adapted to be moved with respect to the stationary machine frame between a working position where the ink-collecting cylinder contacts the intaglio printing cylinder and a retracted position where the ink-collecting cylinder is retracted away from the intaglio printing cylinder,
wherein the axis of rotation of the ink-collecting cylinder lies below a horizontal plane containing the axis of rotation of the intaglio printing cylinder,
wherein the first mobile carriage is adapted to be moved along a direction which is parallel to the horizontal plane,
wherein a plane containing the axis of rotation of the ink-collecting cylinder and the axis of rotation of the intaglio printing cylinder forms, in the working position of the first mobile carriage, an acute angle with respect to the horizontal plane,
wherein the acute angle is between 10° and 25°,
wherein the intaglio printing cylinder is a three-segment plate cylinder carrying three intaglio printing plates, and
wherein the plane containing the axis of rotation of the ink-collecting cylinder and the axis of rotation of the intaglio printing cylinder forms in the working position an obtuse angle of 120° with respect to a plane containing the axis of rotation of the impression cylinder and the axis of rotation of the intaglio printing cylinder,
wherein the ink-collecting cylinder is a three-segment ink-collecting cylinder and wherein the inking system comprises five inking devices that are distributed about a portion of the circumference of the ink-collecting cylinder, each inking device comprising an inking unit and a colour-selector cylinder which is inked by the inking unit and contacts a portion of the circumference of the ink-collecting cylinder,
wherein one colour-selector cylinder, known as a middle colour-selector cylinder, has an axis of rotation that is in the same horizontal plane as the axis of rotation of the ink-collecting cylinder, and
wherein the remaining four colour-selector cylinders are distributed around a left half of the ink-collecting cylinder and are distributed substantially symmetrically around the ink-collecting cylinder with respect to the horizontal plane containing the axis of rotation of the ink-collecting cylinder, such that two of the remaining four colour-selector cylinders are above the middle colour-selector cylinder, and the other two of the remaining four colour-selector cylinders are below the middle colour-selector cylinder.

2. The intaglio printing press as defined in claim 1 , further comprising a wiping system for wiping the inked surface of the intaglio printing cylinder,
wherein the wiping system comprises a wiping roller assembly contacting the surface of the intaglio printing cylinder,
and wherein a plane containing the axis of rotation of the wiping roller assembly and the axis of rotation of the intaglio printing cylinder forms an obtuse angle of 120° with respect to the plane containing the axis of rotation of the impression cylinder and the axis of rotation of the intaglio printing cylinder.

3. The intaglio printing press as defined in claim 1 , wherein the ink-collecting cylinder has the same diameter as the intaglio printing cylinder.

4. The intaglio printing press as defined in claim 1 , wherein the impression cylinder has the same diameter as the intaglio printing cylinder.

5. The intaglio printing press as defined in claim 1 , wherein the intaglio printing press further comprises a second mobile carriage supporting at least part of the at least one inking device, which second mobile carriage is adapted to move with respect to the first mobile carriage between a working position where the second mobile carriage contacts the first mobile carriage and a retracted position where the second mobile carriage is retracted away from the first mobile carriage.

6. The intaglio printing press as defined in claim 1 , wherein the at least one inking device comprises an inking unit and a colour-selector cylinder which is inked by the inking unit and contacts a portion of the circumference of the ink-collecting cylinder,
and wherein the first mobile carriage also supports the colour-selector cylinder of the at least one inking device.

7. The intaglio printing press as defined in claim 1 , further comprising a drive system for driving the ink-collecting cylinder into rotation independently of the intaglio printing cylinder at least during maintenance operations.

8. The intaglio printing press as defined in claim 7 , wherein the drive system comprises an auxiliary drive for rotating the ink-collecting cylinder only during maintenance operations.

9. The intaglio printing press as defined in claim 8 , wherein the auxiliary drive is a servo motor.

10. The intaglio printing press as defined in claim 8 , further comprising a main drive which, during printing operations, drive the intaglio printing cylinder, impression cylinder and ink-collecting cylinder into rotation via gears, wherein gears between the ink-collecting cylinder and the intaglio printing cylinder are disconnected upon displacement of the first mobile carriage away from the stationary machine frame.

11. The intaglio printing press as defined in claim 7 , wherein the drive system comprises an independent drive for rotating the ink-collecting cylinder both during printing operations and during maintenance operations.

12. The intaglio printing press as defined in claim 11 , wherein the independent drive is a torque motor.

13. The intaglio printing press as defined in claim 7 , wherein the drive system used for rotating the ink-collecting cylinder further acts as a means to rotate the ink-collecting cylinder during cleaning operations.

14. The intaglio printing press as defined in claim 13 , further comprising an automatic washing device which can selectively be brought into contact with the ink-collecting cylinder during cleaning operations so as to clean the circumference of the ink-collecting cylinder.

15. The intaglio printing press as defined in claim 1 , wherein each colour-selector cylinder can be driven into rotation during maintenance operations by a drive.

16. The intaglio printing press as defined in claim 1 , further comprising a correcting and adjusting system for correcting and adjusting a rotational position of the ink-collecting cylinder with respect to a rotational position of the intaglio printing cylinder following maintenance operations to ensure proper circumferential register between the ink-collecting cylinder and the intaglio printing cylinder in the working position of the first mobile carriage.

Assignees

• Scheade Johannes Georg
• Schwitzky Volkmar Rolf
• Kba Notasys Sa

Inventors

• Scheade Johannes Georg
• Schwitzky Volkmar Rolf

Classifications

• B41F13/0024 Primary

  Frames · CPC title

• B41F31/004

  Driving means for ink rollers · CPC title

• B41F9/021

  Sheet printing presses · CPC title

• B41F9/00

  Rotary intaglio printing presses · CPC title