EP0886579A1 - Einrichtung zum bestäuben von druckprodukten - Google Patents
Einrichtung zum bestäuben von druckproduktenInfo
- Publication number
- EP0886579A1 EP0886579A1 EP97901026A EP97901026A EP0886579A1 EP 0886579 A1 EP0886579 A1 EP 0886579A1 EP 97901026 A EP97901026 A EP 97901026A EP 97901026 A EP97901026 A EP 97901026A EP 0886579 A1 EP0886579 A1 EP 0886579A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cylinder
- conveyor
- feed
- printed products
- delivery
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F23/00—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing
- B41F23/04—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing by heat drying, by cooling, by applying powders
- B41F23/06—Powdering devices, e.g. for preventing set-off
Definitions
- the invention relates to a device for dusting printed products according to the preamble of claim 1.
- Devices of this type comprise a nozzle arrangement which is arranged inside a printing press above the conveying plane, in which the printed products are moved in a flying manner by grippers carried by endless conveyors.
- the printing products are dusted under conditions which are not exactly constant.
- the present invention is therefore intended to develop a pollinating device according to the preamble of claim 1 in such a way that the printed products are dusted in a constant position with respect to the nozzle arrangement.
- the printed products are arranged flat on the circumferential surface of a conveying cylinder, which moves them past the nozzle arrangement. In this way, there is a constant distance between the surface of the printed products and the nozzle arrangement, even when the conveying speed changes, and a very reliable conveying of the printed products in the vicinity of the powders dispensing nozzle arrangement.
- the development of the invention according to claim 2 is advantageous with regard to a particularly secure fixing of the printed products on the peripheral wall of the feed cylinder.
- This holding on can also be controlled particularly well via the size of the negative pressure. It can also be implemented equally well for very different substrates of the printed products (paper, foils, etc.).
- Claim 3 ensures that the peripheral wall of the delivery cylinder is air-permeable, but no powder particles are sucked through it.
- a fixation of the printed products on the peripheral wall of the delivery cylinder, as specified in claim 4, ensures a good and safe positioning of the printed products on the delivery cylinder.
- the conveyor cylinder and thus the entire dusting device can be easily integrated into the conveyor device of a printing press.
- the conveying cylinder is cleaned without mechanical loading. stirring the cylinder surface.
- the development of the invention according to claim 8 has the advantage that powder dispensed by the nozzle arrangement does not reach remote machine areas.
- FIG. 1 a lateral schematic, partially sectioned view of the outlet end of a printing press, in which a dusting device is arranged;
- FIG. 1 views similar to FIG. 1, in which modified arrangements of the pollination device are reproduced with some details omitted.
- 10 denotes a side frame plate, which represents the outlet-side end of a printing press.
- a second side frame plate parallel to the frame plate 10 is to be thought of above the drawing plane of FIG. 1.
- chain wheels 12 are mounted, over which a conveyor chain 14 runs.
- Grippers 16 are attached to this at regular intervals, each of which moves a printed printed sheet 18 past dryers 20, 22, 24 from a last ink station not shown in the drawing.
- the entire arrangement is symmetrical about a longitudinal center plane of the printing press, which coincides with the plane of the drawing.
- the surface of a conveyor cylinder 28, which is also mounted in the side plates 10, runs tangentially to the outlet-side sprocket 14.
- the conveyor cylinder 28 rotates counterclockwise at a peripheral speed corresponding to the speed of the conveyor chains 16.
- the conveyor chains 32 again carry grippers 18 and run synchronously with the conveyor cylinder 28 and thus with the conveyor chains 16, so that the printed sheets 20 are conveyed uniformly overall in a substantially continuous way.
- a suction box 36 is arranged above the feed cylinder 28, the edge of which faces the feed cylinder 28 runs parallel and at a small distance above the cylinder surface.
- Blow lines 37 run in the interior of the suction box 36 in the vicinity of the front and rear walls and are connected to the outlet of a compressor 38 and end at the open end of the suction box adjacent to the feed cylinder 28.
- a powder nozzle strip 40 is also arranged parallel to the axis of the conveying cylinder 28. It has discharge openings for powder mist cones 42 that face the cylinder surface.
- the interior of the suction box 36 is also connected to a suction blower 46 via a line 44.
- a further suction box 48 is arranged below the delivery cylinder 28 and is also connected to the suction fan 46.
- a blow nozzle strip 50 is arranged in its interior and is connected to the outlet of a compressor 52.
- the feed cylinder 28 has a peripheral wall made of porous material, and its interior is also connected to the suction blower 46 via a suction line which is led out in the cylinder axis and is not shown in the drawing.
- the pores of the wall material are open and have a smaller diameter than the dusted powder particles.
- an electrode 54 Arranged upstream of the sprocket 14 is an electrode 54 which is at a high positive potential and extends across the path of the printed sheets 20 and charges the surface thereof electrostatically.
- Another electrode 56 is arranged downstream of the sprockets 30 and also extends across the path of the printed sheets. The ionization caused by this electrode discharges the printed sheets again.
- the printing sheets 20 are electrostatically charged.
- the grippers 18 open and the printed sheets 20 are taken over by the conveyor cylinder 28 due to their electrostatic charging and due to the negative pressure applied to the interior of the conveyor cylinder 28 and placed there against the outer surface of the peripheral wall.
- the so flutter-free and printed sheets 20 lying securely on the conveying cylinder 28 pass under the powder nozzle bar 40 and are dusted by the powder mist cones 42.
- the printed sheets are taken over by the grippers 18, which are carried by the conveyor chains 32 and move past the electrode 56, whereby the printed sheets are unloaded again.
- the printed sheets 20 are then conveyed to the left in the drawing to a storage space for the finished printed products, where the grippers 33 are opened.
- Powder that is carried along is blown off from the portion of the surface of the conveying cylinder that is located in the drawing by air jets emerging from the blowing nozzle strip 50 and suctioned off via the line 44.
- the air flow maintained in the suction box 36 due to the blow lines 37 and the application of negative pressure largely prevents powder particles from escaping laterally from the suction box surrounding the nozzle bar 40.
- FIG. 2 differs from that according to FIG. 1 in that the feed cylinder 28 now has a smaller diameter and its axis lies essentially on the connecting line of the axes of the chain wheels 14 and 30.
- This arrangement is particularly compact.
- the powder nozzle strip 40 is carried directly by the wall of the suction box 36 on the right.
- the cleaning of the remote from the suction box 36 the side of the conveying cylinder 28 is illustrated in FIG. 2 only by arrows indicating the flow of the air.
- An arrangement as shown in FIG. 2 is suitable for installation in printing presses with a coating tower.
- the exemplary embodiment according to FIG. 3 is largely similar to that according to FIG. 2, only electrodes 54, 56 are again provided in order to charge the printed sheets before they are fed onto the feed cylinder 28 or to discharge them behind the feed cylinder 28.
- 36 electrodes 58, 60 are provided in the interior of the suction box, which serve to electrostatically charge the powder.
- the voltage required for this can e.g. are in the range from 1 kV to 100 kV.
- the dusting device is assigned to the cylinder of the last printing unit of an commercial printing press without a coating tower.
- the delivery cylinder 28 also assumes the role of an impression cylinder.
- a powder mist generator 62 is shown schematically, which generates a powder / carrier gas mixture with which the powder nozzle strip 40 is applied.
- the above-mentioned exemplary embodiments have in common that the printed sheets in the area of the powder nozzle strip 40 are fixed flat and firmly on a base, namely a peripheral section of the conveying cylinder 28. There is thus a constant distance between the dye or varnish layer to be dusted, no dynamic interaction between the printed sheets and the powder mist cones, as is obtained by fluttering the latter in the case of printed sheets guided only by grippers, and furthermore the escape can also be avoided of Pull powder into the printing machine preventing suction box 36, which surrounds the powder nozzle bar 40, in the immediate vicinity of the surface of the conveying cylinder 28, so that the powder mist leakage currents are drastically reduced, because with conventional pollination devices, in which the moving past If the printed sheet on the powder nozzle strip 40 is made by grippers, a large distance between the suction box and the plane of movement of the printed sheets must be maintained to ensure that the grippers pass through.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Electrostatic Spraying Apparatus (AREA)
- Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
- Discharge By Other Means (AREA)
- Printing Methods (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19609438A DE19609438B4 (de) | 1996-03-11 | 1996-03-11 | Einrichtung zum Bestäuben von Druckprodukten |
DE19609438 | 1996-03-11 | ||
PCT/EP1997/000147 WO1997033753A1 (de) | 1996-03-11 | 1997-01-15 | Einrichtung zum bestäuben von druckprodukten |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0886579A1 true EP0886579A1 (de) | 1998-12-30 |
EP0886579B1 EP0886579B1 (de) | 2001-05-16 |
Family
ID=7787901
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97901026A Expired - Lifetime EP0886579B1 (de) | 1996-03-11 | 1997-01-15 | Einrichtung zum bestäuben von druckprodukten |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0886579B1 (de) |
JP (1) | JP4118953B2 (de) |
DE (2) | DE19609438B4 (de) |
WO (1) | WO1997033753A1 (de) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19901245A1 (de) * | 1998-02-17 | 1999-08-19 | Heidelberger Druckmasch Ag | Vorrichtung zum Pudern bedruckter Bogen |
DE29805248U1 (de) * | 1998-03-24 | 1998-05-20 | MAN Roland Druckmaschinen AG, 63075 Offenbach | Bestäubungseinrichtung in einer Druckmaschine |
DE19826083B4 (de) * | 1998-06-12 | 2005-03-31 | Koenig & Bauer Ag | Puderabsaugung in Auslegern von Bogenrotationsdruckmaschinen |
DE19836022A1 (de) | 1998-08-10 | 2000-02-17 | Weitmann & Konrad Fa | Vorrichtung zum Bestäuben von bedruckten Bogen aus Papier o. dgl. |
DE10227242A1 (de) * | 2002-06-19 | 2004-02-05 | Koenig & Bauer Ag | Anordnung zum Pudern von Flächengebilden in einer Druckmaschine |
DE10256320A1 (de) * | 2002-11-28 | 2004-06-09 | Weitmann & Konrad Gmbh & Co Kg | Einrichtung zum Bestäuben von Druckbogen |
DE102009001510A1 (de) | 2009-03-12 | 2010-09-16 | Manroland Ag | Bogenverarbeitungsmaschine |
DE102010001326A1 (de) * | 2010-01-28 | 2011-08-18 | manroland AG, 63075 | Bogendruckmaschine |
DE102010040371A1 (de) | 2010-09-08 | 2012-03-08 | Manroland Ag | Verfahren zum Bestäuben von Bogenmaterial und Verarbeitungsmaschine mit einer Bestäubungsvorrichtung |
DE102012200898A1 (de) | 2012-01-23 | 2013-07-25 | Manroland Ag | Verfahren zum Aufbringen von Puder |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3053180A (en) * | 1960-03-17 | 1962-09-11 | Donald J Doyle | Anti-offset powder spray and cleaner system |
DE4341566B4 (de) * | 1993-12-07 | 2005-03-10 | Heidelberger Druckmasch Ag | Trennmittelschichten zum Oberflächenschutz frisch bedruckter Bogen und Vorrichtung zum Beschichten der frisch bedruckten Bogen mit der Trennmittelschicht |
DE19539757C1 (de) * | 1995-10-26 | 1997-05-22 | Roland Man Druckmasch | Ausleger für eine Bogenrotationsdruckmaschine |
-
1996
- 1996-03-11 DE DE19609438A patent/DE19609438B4/de not_active Expired - Fee Related
-
1997
- 1997-01-15 EP EP97901026A patent/EP0886579B1/de not_active Expired - Lifetime
- 1997-01-15 JP JP53221797A patent/JP4118953B2/ja not_active Expired - Fee Related
- 1997-01-15 WO PCT/EP1997/000147 patent/WO1997033753A1/de active IP Right Grant
- 1997-01-15 DE DE59703549T patent/DE59703549D1/de not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO9733753A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE59703549D1 (de) | 2001-06-21 |
EP0886579B1 (de) | 2001-05-16 |
DE19609438A1 (de) | 1997-09-18 |
JP4118953B2 (ja) | 2008-07-16 |
JP2000506090A (ja) | 2000-05-23 |
DE19609438B4 (de) | 2007-10-11 |
WO1997033753A1 (de) | 1997-09-18 |
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