METHOD FOR OPERATING A WEB-FED PRINTING PRESS
| Title: | METHOD FOR OPERATING A WEB-FED PRINTING PRESS |
|---|---|
| Document Number: | 20100018425 |
| Publication Date: | January 28, 2010 |
| Appl. No: | 12/509179 |
| Application Filed: | July 24, 2009 |
| Abstract: | A method for starting up a web-fed printing press is disclosed. In an embodiment, the method includes: a) a first start-up sequence is executed while using predetermined preset parameters that are specific to the printing press and/or the print job for the color register adjustment, cut-off compensator control and the ink density control; b) the web-fed printing press is subsequently stopped, where copies printed during the first start-up sequence are evaluated with respect to the color register, the cut-off compensator and the ink density, and where the preset parameters are adjusted as a function of this evaluation while the printing press is stopped; c) following this, a second start-up sequence is executed, where the preset parameters that are adjusted during the standstill are not used for printing until defined printing press speeds are reached and/or exceeded. |
| Inventors: | Schaedlich, Ralf (Plauen, DE); Toepfer, Klaus (Muehltroff, DE); Wunderlich, Thomas (Plauen, DE) |
| Assignees: | manroland AG (Offenbach/Main, DE) |
| Claim: | 1. A method for starting up a web-fed printing press while minimizing a time required for start-up and a number of wasted copies generated during the start-up, comprising the steps of: executing a first start-up sequence while using predetermined preset parameters that are specific to the printing press and/or a print job for a color register adjustment, a cut-off compensator control, and an ink density control; subsequently stopping the web-fed printing press; evaluating copies printed during the first start-up sequence with respect to a color register, a cut-off compensator, and an ink density; adjusting the predetermined preset parameters for the color register adjustment, and/or the cut-off compensator control, and/or the ink density control as a function of the evaluating step while the printing press is stopped; and subsequently executing a second start-up sequence, wherein the predetermined preset parameters for the color register adjustment, and/or the cut-off compensator control, and/or the ink density control that are adjusted while the printing press is stopped are not used for printing until defined printing press speeds are reached and/or exceeded. |
| Claim: | 2. The method according to claim 1, wherein printing-press-specific preset parameters determined during a commissioning of the web-fed printing press are used as the predetermined preset parameters for the color register adjustment during the first start-up sequence, and the predetermined preset parameters are stored in a memory of a control system of the web-fed printing press. |
| Claim: | 3. The method according to claim 1, wherein print-job-specific preset parameters from a preliminary stage are used as the predetermined preset parameters for the ink density control during the first start-up sequence, and the predetermined preset parameters are made available by a printing preliminary stage system. |
| Claim: | 4. The method according to claim 1, wherein print-job-specific preset parameters that are a function of a web path and a number of pages of a printed product are used as the predetermined preset parameters for the cut-off compensator control during the first start-up sequence, and the predetermined preset parameters are made available by a production planning system. |
| Claim: | 5. The method according to claim 1, wherein the predetermined preset parameters of the first start-up sequence are made available automatically to a control device and used automatically for the first start-up sequence. |
| Claim: | 6. The method according to claim 1, wherein the step of evaluating and the step of adjusting take place automatically or in an automated manner. |
| Claim: | 7. The method according to claim 1, wherein the predetermined preset parameters for the cut-off compensator control that are adjusted in the adjusting step are used immediately at a start of the second start-up sequence. |
| Claim: | 8. The method according to claim 1, wherein the predetermined preset parameters for the ink density control that are adjusted during the adjusting step are used when a first defined printing press speed is reached or exceeded after a start of the second start-up sequence. |
| Claim: | 9. The method according to claim 8, wherein the predetermined preset parameters for the color register adjustment that are adjusted during the adjusting step are used when a second defined printing press speed is reached or exceeded after the start of the second start-up sequence. |
| Claim: | 10. The method according to claim 9, wherein the second defined printing press speed is greater than the first defined printing press speed. |
| Claim: | 11. The method according to claim 1, wherein an infeed mechanism downstream from a printing unit is incorporated into a position regulator of a main drive axis of the web-fed printing press. |
| Claim: | 12. The method according to claim 11, wherein the infeed mechanism has a high coefficient of friction. |
| Claim: | 13. The method according to claim 1, wherein the web-fed printing press is a newspaper printing press. |
| Current U.S. Class: | 101/483 |
| Current International Class: | 41 |
| Accession Number: | edspap.20100018425 |
| Database: | USPTO Patent Applications |
Be the first to leave a comment!