Printing machine

• US 8,960,891 B2
• Filed: 05/25/2012
• Issued: 02/24/2015
• Est. Priority Date: 06/01/2011
• Status: Active Grant

• Current Assignee: Koenig & Bauer AG
• Original Assignee: Koenig & Bauer AG
• Inventors: Hcker, Christoph Alban, Huppmann, Frank Eberhard, Wander, Stefan
• Primary Examiner(s): Martin, Laura
• Assistant Examiner(s): Liang, Leonard S
• Application Number:
  US14/119,275
• Publication Number:
  US 20140184710A1
• Time in Patent Office: 1,005 Days
• Field of Search: 347/102, 347/101, 347/16, 347/17, 347/38, 347/40, 347/104, 347/106
• US Class Current: 347/102
• CPC Class Codes: B41J 11/0015 for treating before, during or after printing or for uniform coating or laminating the copy material before or after printing selective coating B41J2/2114
• CPC Class Codes: B41J 11/002 Curing or drying the ink on the copy materials, e.g. by heating or irradiating
• CPC Class Codes: B41J 11/00214 using UV radiation
• CPC Class Codes: B41J 11/00216 using infrared [IR] radiation or microwaves
• CPC Class Codes: B41J 11/0022 using convection means, e.g. by using a fan for blowing or sucking air
• CPC Class Codes: B41J 15/16 Means for tensioning or winding the web
• CPC Class Codes: B41J 15/165 for tensioning continuous copy material by use of redirecting rollers or redirecting nonrevolving guides
• CPC Class Codes: B41J 3/60 for printing on both faces of the printing material

Abstract

The invention relates to a printing machine, wherein the printing machine has at least one first printing unit and at least one first dryer, wherein the at least one first printing unit has at least one inkjet print head, at least one first central cylinder, and an integral first drive motor dedicated to the at least one first central cylinder, and wherein the at least one first dryer is embodied as a radiation dryer, and wherein the at least one first dryer has at least one ventilating device, which has at least one air infeed line and at least one air removal line, and wherein at least one first cooling unit is arranged downstream of the at least one first dryer along a transport path of a printing material through the printing machine.

Claims

1. A printing machine, wherein the printing machine has at least one first printing unit and at least one first dryer, wherein the at least one first printing unit has at least one inkjet print head, at least one first central cylinder, and an integral first drive motor dedicated to the at least one first central cylinder, and wherein the at least one first dryer is embodied as a radiation dryer having a radiation source, and wherein at least one first cooling unit is arranged downstream of the radiation source of the at least one first dryer along a transport path of a printing material through the printing machine, characterized in that the at least one first dryer has at least one ventilating device, which has at least one air infeed line and at least one air removal line, and in that the transport path of the printing material through an area of action of the at least one first dryer extends at least 75% in at least one direction having a greater vertical component than an optionally existing horizontal component, and in that a straight line connecting a rotational axis of the at least one first central cylinder of the at least one first printing unit with a rotational axis of at least one second central cylinder of at least one second printing unit intersects at least one dryer unit, which includes the at least one first dryer.

2. The printing machine according to claim 1, characterized in that the at least one first dryer, which is followed by at least one second printing unit, which is followed by at least one second dryer are arranged downstream of the at least one first printing unit along the transport path of the printing material through the printing machine.

3. The printing machine according to claim 1, characterized in that the at least one first dryer is embodied as an infrared radiation dryer.

4. The printing machine according to claim 1, characterized in that the at least one first cooling unit has at least one first cooling roller.

5. The printing machine according to claim 4, characterized in that part of an outer surface of the at least one first cooling roller, which is provided as a contact surface between the at least one first cooling roller and the printing material, has a wrap angle around the at least one first cooling roller measures at least 180°

.

6. The printing machine according to claim 4, characterized in that a first cooling impression roller is provided, and which is engageable against the at least one first cooling roller.

7. The printing machine according to claim 6, characterized in that the at least one first cooling roller has an integral drive motor dedicated to the at least one first cooling roller.

8. The printing machine according to claim 7, characterized in that the drive motor which is dedicated to the at least one cooling roller, and the first cooling impression roller are part of a web tension adjustment system and are connected to a machine controller of the printing machine.

9. The printing machine according to claim 1, characterized in that the area of action of the at least one first dryer is composed of areas of action of all radiation sources of the at least one first dryer.

10. The printing machine according to claim 1, characterized in that the at least one ventilating device of the at least one first dryer has the at least one air infeed line with at least one ventilation opening connected thereto, and the at least one air removal line with at least one venting opening connected thereto.

11. The printing machine according to claim 1, characterized in that at least one ventilation opening, which is connected to the at least one air infeed line, is arranged between at least two radiation sources of the at least one first dryer.

12. The printing machine according to claim 1, characterized in that a positive pressure is maintained in the at least one first dryer.

13. The printing machine according to claim 1, characterized in that at least one rewetting unit is arranged downstream of the at least one first dryer (301) along the transport path of the printing material.

14. The printing machine according to claim 1, characterized in that part of the outer surface of the at least one first central cylinder, which part is provided as a contact surface between the at least one first central cylinder and a printing material, has a wrap angle around the at least one first central cylinder of at least 270°

.

15. The printing machine according to claim 1, characterized in that a first side of the printing material web which has been imprinted by the at least one first printing unit is not in contact with any component of the printing machine between a last point of contact of the printing material web with the at least one first central cylinder of the at least one first printing unit and an area of action of the at least one first dryer.

16. The printing machine according to claim 1, characterized in that a second side of the printing material web, which is in contact with the first central cylinder of the at least one first printing element, is in contact with at least one of a deflecting roller of the at least one first printing unit and/or with at least one deflecting roller of the at least one first dryer between a last point of contact of the printing material web with the at least one first central cylinder of the at least one first printing unit and the area of action of the at least one first dryer.

17. The printing machine according to claim 1, characterized in that an infeed nip, which is formed by a traction roller and a traction impression roller, is arranged between a web edge aligner at least two alignment rollers and the at least one first central cylinder, along a transport path of a printing material web.

18. The printing machine according to claim 1, characterized in that at least one infeed nip, a first impression roller nip, a first cooling roller nip a second impression roller nip, a second cooling roller nip and a drawing nip are arranged along a transport path of a printing material through the printing machine.

19. The printing machine according to claim 1, characterized in that the printing machine is embodied as a web-fed inkjet printing machine.

20. The printing machine according to claim 1, characterized in that a temperature control device of the at least one first dryer has at least one liquid temperature-controlled component.