EP0629154A1 - Dusting appliance. - Google Patents
Dusting appliance.Info
- Publication number
- EP0629154A1 EP0629154A1 EP93904014A EP93904014A EP0629154A1 EP 0629154 A1 EP0629154 A1 EP 0629154A1 EP 93904014 A EP93904014 A EP 93904014A EP 93904014 A EP93904014 A EP 93904014A EP 0629154 A1 EP0629154 A1 EP 0629154A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- box
- downstream
- powder
- product conveying
- nozzle arrangement
- 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
- 238000010410 dusting Methods 0.000 title claims abstract description 11
- 239000000843 powder Substances 0.000 claims abstract description 49
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 5
- 230000010152 pollination Effects 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- 239000011148 porous material Substances 0.000 claims description 2
- 230000006835 compression Effects 0.000 abstract 3
- 238000007906 compression Methods 0.000 abstract 3
- 238000011161 development Methods 0.000 description 8
- 230000018109 developmental process Effects 0.000 description 8
- 238000007789 sealing Methods 0.000 description 5
- 239000002245 particle Substances 0.000 description 4
- 239000000976 ink Substances 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 238000011109 contamination Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000012229 microporous material Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
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 flat products, in particular printed products, with powder according to the preamble of claim 1.
- Such a pollination device is described in DE-PS 22 07 983.
- An upstream and downstream air curtain ensures that no powder dust escapes from the actual treatment room.
- the air extraction in the interior ensures that the air curtains divide cleanly and swirl-free at their free end adjacent to the product conveying level and excess powder is continuously removed from the treatment room.
- the downstream suction nozzle arrangement is located in the conveying direction in front of the downstream air nozzle arrangement. This juxtaposition leads to a very sharp redirection of the air in a small area.
- the downstream suction nozzle arrangement ir-. the box end wall lies above the downstream air nozzle .ar arrangement, and in this way one obtains a less sharply curved, larger section of the box end detecting circulation, that is to say an air roller running in the opposite direction to the conveying direction than an air curtain hitting the conveying surface perpendicularly. This applies in particular when the downstream air nozzle arrangement is inclined according to claim 4.
- FIG. 1 a vertical section through a dusting device for printed products, which is arranged behind a dryer at the upper end of an increasing conveyor section in a printing press;
- FIG. 2 a transverse section through the pollination device according to FIG. 1 along the section line II-II there;
- FIG. 3 shows an enlarged section through part of a ceiling wall of the dusting device according to FIGS. 1 and 2.
- 10, 12 denote two chain guides, in which only schematically indicated conveyor chains 14 are guided.
- the conveyor chains 14 carry tabs 16 aligned in pairs at intervals, which in turn are not close to the carrier shown for printed products.
- the conveyed surface of the printed products is indicated by dash-dotted lines at 18.
- FIG. 1 shows the upper end of a rising conveyor path section and a deflection section into the horizontal.
- a dryer 20 Arranged in the rising conveying section is a dryer 20, only indicated schematically, which dries the moist printing inks by hot air and / or radiation.
- a dusting device designated as a whole by 22, is provided downstream of the dryer 20.
- the box section 26 is formed in the upstream end with a square cross-section compressed air channel 30, which is equipped in its wall facing the conveying surface 18 with a plurality of nozzles which together produce a vertical upstream air curtain 32 directed against the conveying surface 18.
- a suction channel 33 with suction openings facing the conveying surface 18 is provided in parallel behind the compressed air channel 30. Viewed in the conveying direction, behind the compressed air duct 30 and in front of the suction duct 33, a powder duct 34 is provided, to which a powder / air mixture is supplied from an atomizer 36, which is only indicated schematically.
- the atomizer 36 can e.g. have the structure described in DE-OS 38 19 203, to which reference is made.
- the box section 26 is closed towards the conveying surface 18 by a wall 38, the distance from the product conveying surface of which is denoted by h.
- the box section 28 is inclined overall by a small angle w with respect to the box section 26. This inclination is chosen with a view to adapting to the curved conveying surface 18.
- the wall 42 has a significantly greater distance from the conveying surface 18 than the wall 38. The average distance corresponds to the distance H.
- the walls 40 and 42 are an air permeable microporous material, e.g. a sintered material produced from fine polyethylene particles.
- the walls 40 and 42 are fastened to strips 44 which are in turn carried by outer boundary walls 46 of the box section 28.
- the flat space lying between the boundary walls 46 and the walls 40, 42 is connected via a line 48 to a compressed air source.
- Box profiles 50 form the side walls of the box section 28. They are connected via a perforated wall 52 to the interior of the box section 28 and are connected via a line 54 to a vacuum source. The same applies to a box profile 56 which forms the end of the box section .28 and has an essentially triangular cross section, which is connected to the inside of the box via a perforated wall 58 (cf. FIG. 2 ⁇ and is also connected to the line 54 .
- a compressed air duct 60 having a rectangular cross section is connected to the bevelled lower end of the box profile 56 in such a way that its cross-sectional axis has an angle of approximately 45 ° with the conveying surface 18.
- lower end wall of the compressed-air duct 60 carries sen a plurality unplayed Dü ⁇ which together create an air curtain 62, which, contrary to the product conveying direction to the dusting device is incident at an angle of 45 ⁇ 22 leaving print products.
- This air curtain is mostly through the openings 58 are suctioned off, so that this air curtain as a whole forms a relatively large diameter air roller rotating against the product conveying direction.
- compressed air channels 64, 66 are divided by intermediate walls in the box profiles, which are again provided with a plurality of nozzles in their walls located in FIG Generate air curtains 68, 70.
- a sheet guide box denoted overall by 72, is provided below the conveying surface 18. This is closed off towards the conveying surface by a perforated plate 74 with fine perforations and is connected to a vacuum line 76.
- sealing strips 78 which hang downward can be provided, which extend up to the immediate vicinity of the movement surface of the ends of the drivers (not shown) which are moved by the conveyor chains 14.
- the bow guide box 72 can carry sealing strips 80 which are brought up to the movement surface of the fastening ends of the drivers.
- the compressed air duct 60 is attached to the powder box 24 in an electrically insulated manner and is connected to the one terminal of a high-voltage source 32, which emits a voltage of 7.5 kV.
- the other terminal of the high-voltage switch is connected to the powder box 24. In this way, a field is built up from the compressed air channel 60 to the powder box 24, which powder particles also enter the inside of the barracks.
- the wall 40 and the wall 42 are fastened to the strips 44 with screws 84.
- the latter have passages 86 so that the back of the microporous wall material is continuously pressurized with compressed air.
- the wall material has very small sintered particles 90 which e.g. can consist of polyethylene.
- Such a material is mechanically self-supporting and has a very small pore size.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Electrostatic Spraying Apparatus (AREA)
- Breeding Of Plants And Reproduction By Means Of Culturing (AREA)
Abstract
Dispositif de saupoudrage de produits formés par compression qui comporte une boîte à poudre (24) présentant une section de boîte (28) située en aval, dans le sens du transport, dont la paroi de converture (40, 42) est plus éloignée de la surface de transport des produits (18) que la paroi de couverture (38) d'une section de boîte (26) située en amont. Un dispositif à buses d'air (60) situé en aval produit un rideau d'air (62) arrivant sur les produits formés par compression obliquement, dans une direction opposée au sens de transport des produits. Un dispositif de saupoudrage de ce type ne génère que des pertes minimes de poudre dans l'environnement ambiant même lorsque les vitesses de transport des produits formés par compression sont élevées et que la concentration de poudre à l'intérieur de la boîte de poudre (24) est élevée.Device for sprinkling products formed by compression which comprises a powder box (24) having a box section (28) located downstream, in the direction of transport, the converting wall (40, 42) of which is further away from the product transport surface (18) than the cover wall (38) of an upstream box section (26). A downstream air nozzle device (60) produces an air curtain (62) arriving on the formed products by compression obliquely in a direction opposite to the direction of transport of the products. A dusting device of this type generates only minimal losses of powder in the ambient environment even when the transport speeds of the products formed by compression are high and the concentration of powder inside the powder box (24 ) is high.
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4207118 | 1992-03-06 | ||
DE4207118A DE4207118C2 (en) | 1992-03-06 | 1992-03-06 | Pollinator |
PCT/EP1993/000432 WO1993017866A1 (en) | 1992-03-06 | 1993-02-25 | Dusting appliance |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0629154A1 true EP0629154A1 (en) | 1994-12-21 |
EP0629154B1 EP0629154B1 (en) | 1996-01-03 |
Family
ID=6453399
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP93904014A Expired - Lifetime EP0629154B1 (en) | 1992-03-06 | 1993-02-25 | Dusting appliance |
Country Status (5)
Country | Link |
---|---|
US (1) | US5443005A (en) |
EP (1) | EP0629154B1 (en) |
JP (1) | JP3184529B2 (en) |
DE (2) | DE4207118C2 (en) |
WO (1) | WO1993017866A1 (en) |
Families Citing this family (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5537925A (en) * | 1993-09-03 | 1996-07-23 | Howard W. DeMoore | Infra-red forced air dryer and extractor |
US5746131A (en) * | 1995-11-02 | 1998-05-05 | Heidelberger Druckmaschinen Ag | Powder sprayer |
DE19703626A1 (en) * | 1996-01-31 | 1998-08-06 | Weitmann & Konrad Fa | Dusting of flat objects in motion |
DE29623325U1 (en) | 1996-03-11 | 1998-03-05 | Platsch, Hans Georg, 70565 Stuttgart | Device for dusting printed products |
DE19622234A1 (en) * | 1996-06-03 | 1997-12-04 | Weitmann & Konrad Fa | Powdering machine for workpiece in transit |
DE19643747A1 (en) * | 1996-10-23 | 1998-04-30 | Heidelberger Druckmasch Ag | Separating medium application device for flat products |
DE19643987C1 (en) * | 1996-10-31 | 1998-02-19 | Roland Man Druckmasch | Spraying powder onto freshly printed sheets |
DE19647259A1 (en) * | 1996-11-15 | 1998-05-20 | Weitmann & Konrad Fa | Method and device for cleaning means of transport |
DE19648227A1 (en) * | 1996-11-21 | 1998-05-28 | Hans Georg Platsch | Method and device for dusting products, in particular printed products |
EP0847856A3 (en) * | 1996-12-10 | 1998-12-30 | Heidelberger Druckmaschinen Aktiengesellschaft | Powdering device for sheets |
US5966836A (en) * | 1997-04-11 | 1999-10-19 | Howard W. DeMoore | Infrared heating apparatus and method for a printing press |
DE19751383B4 (en) * | 1997-11-20 | 2004-12-09 | Weitmann & Konrad Gmbh & Co Kg | Method and device for applying powder to moving printed sheets |
DE19901670C5 (en) * | 1998-01-20 | 2016-11-03 | Hans-Peter Koch | Method and device for keeping clean and / or cleaning a sheet delivery of a sheet-fed offset printing press |
DE19859246A1 (en) * | 1998-01-20 | 1999-07-22 | Koch Hans Peter | Sheet offset printing process |
DE19901245A1 (en) * | 1998-02-17 | 1999-08-19 | Heidelberger Druckmasch Ag | Printed sheet powder dusting system, e.g. for high speed rotary printing machine |
DE29805248U1 (en) * | 1998-03-24 | 1998-05-20 | MAN Roland Druckmaschinen AG, 63075 Offenbach | Pollination device in a printing press |
DE19812711C2 (en) * | 1998-03-24 | 2000-04-27 | Roland Man Druckmasch | Pollination device in a printing press |
DE19826083B4 (en) * | 1998-06-12 | 2005-03-31 | Koenig & Bauer Ag | Powder extraction in jibs of sheet-fed rotary printing presses |
JP2001001496A (en) * | 1999-06-24 | 2001-01-09 | Toppan Printing Co Ltd | Apparatus and method for collecting dust for printer |
DE10161269B4 (en) * | 2001-12-13 | 2005-03-17 | Koenig & Bauer Ag | Boom of a sheet-fed rotary printing machine |
DE10161267B4 (en) | 2001-12-13 | 2007-08-09 | Koenig & Bauer Aktiengesellschaft | Device for powder and hot air extraction in the delivery of a sheet-fed rotary printing machine |
DE102004054386C5 (en) * | 2003-12-01 | 2018-10-25 | Heidelberger Druckmaschinen Ag | Method for protecting a chain guide of a printing press against the penetration of powder |
CN101045365A (en) * | 2006-03-28 | 2007-10-03 | 海德堡印刷机械股份公司 | Device for applicating powder onto sheets |
DE102009001510A1 (en) * | 2009-03-12 | 2010-09-16 | Manroland Ag | Sheet processing machine |
DE102011005887B4 (en) * | 2010-09-17 | 2024-05-08 | manroland sheetfed GmbH | Device for extracting powder residues in printing machines |
Family Cites Families (8)
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 |
US3333570A (en) * | 1964-10-09 | 1967-08-01 | Jens A Paasche | Anti-ink offset powder assembly |
DE2207983C3 (en) * | 1972-02-21 | 1980-05-29 | Albin Platsch Zerstaeubungstechnik, 7000 Stuttgart | Powder dusting device |
DE2519831A1 (en) * | 1975-05-03 | 1976-11-11 | Platsch Zerstaeubung Albin | DEVICE FOR POWDER INJECTION |
US4332198A (en) * | 1980-06-23 | 1982-06-01 | Schmoeger Duane A | Printing press with an air assist sheet delivery and powdering system |
US4867063A (en) * | 1986-11-25 | 1989-09-19 | Gerald Baker | Method and apparatus for dispensing powder in a printing press |
DE3819203A1 (en) * | 1988-06-06 | 1989-12-07 | Klaschka Ind Elektronik | DUSTING DEVICE |
US4882992A (en) * | 1988-07-29 | 1989-11-28 | Airtech Company, Inc. | Combination powder applying and/or infrared drying attachment for printing presses |
-
1992
- 1992-03-06 DE DE4207118A patent/DE4207118C2/en not_active Expired - Fee Related
-
1993
- 1993-02-25 US US08/256,550 patent/US5443005A/en not_active Expired - Lifetime
- 1993-02-25 EP EP93904014A patent/EP0629154B1/en not_active Expired - Lifetime
- 1993-02-25 WO PCT/EP1993/000432 patent/WO1993017866A1/en active IP Right Grant
- 1993-02-25 DE DE59301342T patent/DE59301342D1/en not_active Expired - Fee Related
- 1993-02-25 JP JP51529393A patent/JP3184529B2/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO9317866A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE4207118C2 (en) | 2001-05-10 |
WO1993017866A1 (en) | 1993-09-16 |
EP0629154B1 (en) | 1996-01-03 |
DE59301342D1 (en) | 1996-02-15 |
JP3184529B2 (en) | 2001-07-09 |
DE4207118A1 (en) | 1993-09-09 |
US5443005A (en) | 1995-08-22 |
JPH07504134A (en) | 1995-05-11 |
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Legal Events
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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