Claims
- 1. A machine for printing sheets, in particular securities sheets, for printing unprinted sheets while not printing intermediate sheets, the machine having at least one feed (31) for unprinted sheets (32), a plate cylinder (35) with at least one printing plate, an impression cylinder (36), a wiping device (49) and an inking system (37, 38, 39, 40, 41, 42, 43, 44, 45) for inking the necessary zones of the plate or plates-carried by the plate cylinder (35), wherein for an impression cylinder (36) which can carry N sheets on its periphery, N is a multiple of 2, the plate cylinder (35) comprises N/2 plates, so that half of the sheets (32) carried by the impression cylinder (36) are printed by each of the plates during one complete revolution of the cylinders (35, 36).
- 2. The printing machine as claimed in claim 1, wherein the N/2 plates are distributed symmetrically on the plate cylinder (35).
- 3. The printing machine as claimed in claim 1, wherein it additionally contains a feed device (46) for intermediate sheets, with which an intermediate sheet (47) is introduced between each sheet (32) to be printed, and wherein the sheet which is not printed by a plate is an intermediate sheet (47).
- 4. The printing machine as claimed in claim 3, wherein the intermediate sheets are fed on the impression cylinder (36).
- 5. The printing machine as claimed in one of claims 1, wherein N is equal to 2.
- 6. The printing machine as claimed in one of claims 1, wherein it comprises a delivery stack (34), on which the sheets from the impression cylinder are deposited after a complete revolution of the latter.
- 7. The printing machine as claimed in claim 6, wherein the inking system is an indirect inking system, comprising an ink collecting cylinder (45), which interacts firstly with at least one ink applicator cylinder (42, 43, 44) and secondly with the plate cylinder (35) in order to ink the necessary zones of the plate or plates carried by the plate cylinder (35).
Priority Claims (1)
Number |
Date |
Country |
Kind |
2059/00 |
Oct 2000 |
CH |
|
CROSS REFERENCE TO RELATED APPLICATIONS
[0001] This application is a divisional application of U.S. patent application Ser. No. 10/168,784, filed Sep. 30, 2002 of the same title, the content of which is incorporated herein by reference.
Divisions (1)
|
Number |
Date |
Country |
Parent |
10168784 |
Sep 2002 |
US |
Child |
10816871 |
Apr 2004 |
US |