EP0074045A1 - Dispositif pour l'application de particules de poudre - Google Patents

Dispositif pour l'application de particules de poudre Download PDF

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Publication number
EP0074045A1
EP0074045A1 EP82107941A EP82107941A EP0074045A1 EP 0074045 A1 EP0074045 A1 EP 0074045A1 EP 82107941 A EP82107941 A EP 82107941A EP 82107941 A EP82107941 A EP 82107941A EP 0074045 A1 EP0074045 A1 EP 0074045A1
Authority
EP
European Patent Office
Prior art keywords
powder
sheet
powder particles
gripper
underside
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.)
Withdrawn
Application number
EP82107941A
Other languages
German (de)
English (en)
Inventor
Heinz Weitmann
Edwin Dr. Muz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Weitmann and Konrad GmbH and Co KG
Original Assignee
Weitmann and Konrad GmbH and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Weitmann and Konrad GmbH and Co KG filed Critical Weitmann and Konrad GmbH and Co KG
Publication of EP0074045A1 publication Critical patent/EP0074045A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
    • B05B5/025—Discharge apparatus, e.g. electrostatic spray guns
    • B05B5/057—Arrangements for discharging liquids or other fluent material without using a gun or nozzle
    • 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 applying powder particles by means of a gas flow generating spray device onto sheets of paper or the like printed in a printing press, which are transported by gripper carriages and endless gripper chains from a printing device of the printing press to a stack and are deposited there.
  • the spraying or dusting device which generates the gas stream laden with powder is arranged between sections of the gripper chain which are moved in opposite directions, that is to say inside the area enclosed by this chain. Since the gripper chain rotates at a relatively high speed, for example 100 m / min or even more, and the gripper carriages holding the paper sheets are relatively bulky structures with great air resistance, strong air vortices form at the location of the spraying device, which spray the top of the sheet evenly by means of the gas powder emerging from the spraying device, which greatly impedes the powder particles which carry the gas stream.
  • the delivery device 2 comprises, in a manner known per se, two endless gripper chains 5 which are arranged at a mutual spacing and which are connected by transverse gripper carriages. The length of these gripper carriages 6, measured transversely to the plane of the drawing in FIG. 1, and thus the distance between the two gripper chains 5, of which only a single chain is shown in FIG.
  • the gripper carriages 6 are provided on their end faces with rollers 7 (FIG. 3) which run in corresponding guideways arranged on the machine housing 1.
  • Each gripper carriage 6 has a gripper 8 which holds the sheet 3 to be transported at the front edge, so that each sheet is dragged along by the relevant gripper carriage 6 in the direction of arrow A to the stack 4.
  • the empty gripper carriages return to the printing device in the direction of arrow B, where they are loaded again with printed sheets and then pass through the delivery device 2 in the direction of arrow A.
  • the sheets 3 are dragged along by the gripper car 6 so that the printed sheet side in FIG. 1 and in particular on the stack 4 is directed upwards.
  • the printed sheets In order to promote the drying of the printed sheets 3 on the stack 4 and to prevent smearing of the still damp printing ink when the sheets are stacked on top of one another in the stack 4, the printed sheets must be coated with powder, for example starch powder, before they are deposited.
  • powder for example starch powder
  • a powder dusting device is arranged between the gripper carriages 6 moving in opposite directions and thus inside the area enclosed by the endless chains 5, which is shown in dashed lines in FIG. 1 and provided with the reference number 9. From this device, the powder reaches the printed top of the sheet 3, which lies between the gripper chains 5 and the gripper car 6.
  • each gripper car 6 has a considerable distance from the sheet top to be coated, which is unfavorable for even and lossless pollination.
  • the gripper carriages running in the opposite direction at high speed in the area of the device 9 generate turbulence which, on the one hand, also hinders the uniform application of the powder and also triggers a carryover of the powder to places on the printing press where the powder is highly undesirable.
  • the invention is based on the general idea of removing the spray device 9 from the area between the chains 5 and the gripper carriage 6 and arranging it outside the area wrapped around the chain, in such a way that pollination of the sheets of below on the - usually unprinted - underside of the sheet.
  • a spray device arranged and functioning in this way is schematically provided with the reference number 11.
  • Such a spray device could also be arranged as indicated in FIG. 1 by reference number 12. In this case, pollination does not take place vertically, but diagonally from below. In both cases, the powder or solid particles to be applied fly against the effect of gravity.
  • FIG. 2 shows a nozzle 13 which is suitable for this purpose and widens towards its outlet end, from which a moderately turbulent cloud of smoke 14 emerges.
  • FIG 3 shows a particularly preferred embodiment of a powder spraying device. This device is based on the idea that in order to better adhere the solid particles carried in the gas stream with the leading arc, the particles and the arc are each electrically charged with opposite polarity.
  • FIG. 3 again shows part of the gripper chain 5, which is connected to a gripper carriage 6.
  • a roller 7 of the gripper carriage 6 runs in a guide track (not shown).
  • the actual gripper 8, which serves to clamp the sheet of paper 3, is also arranged on the gripper carriage 6. The whole arrangement again moves in the direction of arrow A.
  • An electrostatic spraying device which is designated as a whole by the reference symbol 21, is arranged below the sheet 3 and at a very short distance from the underside thereof.
  • This device comprises, in a housing, which is preferably made of insulating material, a channel 22 which extends over the entire width of the arc 3.
  • the gas stream charged with powder is blown in at a moderate speed in the direction of arrow C.
  • the channel 22 has an opening 27 directed transversely to the forward direction A of the sheet 3, which can be designed, for example, as a slot extending over the entire width of the sheet 3.
  • a plurality of openings 27 lying next to one another in the direction of the arc width can also be used.
  • the device 21 has a transverse channel 28, in which in the direction perpendicular to the drawing 3 a row of metal tips 29 is arranged.
  • the metal tips 29 are connected to a high voltage source 31, which charges the tips 29 with a high voltage of certain polarity.
  • a second row of electrodes formed by tips 32 is charged via a high voltage source 33 with high voltage of opposite polarity as the tips 29.
  • the tips 32 are located in the path of the incoming gas stream carrying the powder particles in front of the opening 27.
  • the trough 26 can be grounded.
  • the spray device 21 functions in the following manner:
  • the underside of the arc 3 advancing in the direction of arrow A is electrically charged with a certain polarity (for example positive) due to the corona discharges which form at the tips 29.
  • the powder particles entering in the direction of arrow C receive an electrical charge of opposite polarity (for example negative) as they travel through the corona discharges which form at the tips 32.
  • These charged particles pass the (slit-shaped) opening 27, they are attracted by the oppositely charged underside of the sheet 3 and held there, so that the underside 3 of the sheet is coated with a fine layer of powder.
  • Excess powder gets into the tub 26 in the direction of arrow D due to the negative pressure generated at the outlet end 24. There is none over the opening 27 charged paper sheet is present, no charged powder emerges from the opening 27.
  • the arrangement of the spray devices 11 and 12 on de and outside of that of the 5 enclosed area has the advantage that the spray devices 11, 12 almost be arranged on the underside of the sheet therefore sufficient to apply the powder Particles a gas stream of very low speed, which is unable to undesirably disperse the powder particles in the environment outside the sheet 3.
  • the spray device 21 shown in FIG. 3 is not only suitable for powder dusting from below for sheets that are transported by a gripper device with gripper chains 5 and gripper carriage 6. In the case of other sheet conveying devices, the dusting with the device 21 shown in FIG. 3 could also easily take place from above.
  • the electrode 32 with voltage source 33 shown in FIG. 3 can be omitted.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Electrostatic Spraying Apparatus (AREA)
  • Discharge By Other Means (AREA)
  • Adjustment And Processing Of Grains (AREA)
  • Catching Or Destruction (AREA)
EP82107941A 1981-09-05 1982-08-28 Dispositif pour l'application de particules de poudre Withdrawn EP0074045A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19813135220 DE3135220A1 (de) 1981-09-05 1981-09-05 Vorrichtung zum aufbringen von puderteilchen
DE3135220 1981-09-05

Publications (1)

Publication Number Publication Date
EP0074045A1 true EP0074045A1 (fr) 1983-03-16

Family

ID=6140960

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82107941A Withdrawn EP0074045A1 (fr) 1981-09-05 1982-08-28 Dispositif pour l'application de particules de poudre

Country Status (4)

Country Link
EP (1) EP0074045A1 (fr)
JP (1) JPS5871165A (fr)
DD (1) DD203500A5 (fr)
DE (1) DE3135220A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2545968A1 (fr) * 1983-05-10 1984-11-16 Canon Kk Appareil d'enregistrement
EP0695584A2 (fr) 1994-08-06 1996-02-07 PLATSCH, Hans G. Appareil de poudrage
EP0839650A1 (fr) * 1996-10-31 1998-05-06 MAN Roland Druckmaschinen AG Appareil de poudrage
EP0839651A1 (fr) * 1996-10-31 1998-05-06 MAN Roland Druckmaschinen AG Procédé pour saupoudrer, spécialement un matériau en feuille imprimé dans une machine d'impression
EP0847856A2 (fr) * 1996-12-10 1998-06-17 Heidelberger Druckmaschinen Aktiengesellschaft Dispositif pour saupoudrer des feuilles
EP0947321A1 (fr) * 1998-03-24 1999-10-06 MAN Roland Druckmaschinen AG Poudreur dans une machine d'impression

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3217779A1 (de) * 1982-05-12 1983-11-17 Weitmann & Konrad GmbH & Co KG, 7022 Leinfelden-Echterdingen Vorrichtung zur steuerung des puderbestaeubers in einer druckmaschine
JPH0498140U (fr) * 1991-01-23 1992-08-25
JPH082640B2 (ja) * 1991-08-23 1996-01-17 有限会社島田機械サービス 浮き出し加工用粉末付着装置
DE19632899A1 (de) * 1996-08-16 1998-02-19 Weitmann & Konrad Fa Vorrichtung zum Bestäuben bewegter Gegenstände, insbesondere bedruckter Papierbögen
DE19707157B4 (de) * 1997-02-22 2006-04-06 Weitmann & Konrad Gmbh & Co Kg Vorrichtung zum Bestäuben von bewegten flächigen Produkten
DE29805248U1 (de) * 1998-03-24 1998-05-20 MAN Roland Druckmaschinen AG, 63075 Offenbach Bestäubungseinrichtung in einer Druckmaschine
DE19836022A1 (de) * 1998-08-10 2000-02-17 Weitmann & Konrad Fa Vorrichtung zum Bestäuben von bedruckten Bogen aus Papier o. dgl.
DE102005032801B4 (de) * 2005-07-14 2010-07-01 Manroland Ag Verfahren und Vorrichtung zum Bepudern von Bedruckstoffen
DE102007027473A1 (de) 2007-06-14 2008-12-18 Manroland Ag Drucktechnisch hergestellte funktionale Komponenten
WO2011030644A1 (fr) * 2009-09-14 2011-03-17 株式会社コスモテック Dispositif de dispersion de poudre pour impression
DE202009016037U1 (de) 2009-11-24 2010-02-25 Manroland Ag Vorrichtung zum Bepudern von Bedruckstoffen
DE102010043568A1 (de) * 2010-11-08 2012-05-10 Weitmann & Konrad Gmbh & Co Kg Vorrichtung zum Aufbringen von Puder auf Bedruckstoffe
CN102649346B (zh) * 2011-02-28 2017-08-29 海德堡印刷机械股份公司 从下面给经印刷和/或涂有亮油的页张撒粉或扑粉的设备

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2110219A (en) * 1937-07-31 1938-03-08 Binks Mfg Co Method of preventing offset in printing
US3556519A (en) * 1967-06-23 1971-01-19 Leo Keller Method and apparatus for stacking paper sheets or the like
GB1459834A (en) * 1972-02-22 1976-12-31 Owens Corning Fiberglass Corp Impregnating strands formed from a plurality of non-conducting filaments

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2110219A (en) * 1937-07-31 1938-03-08 Binks Mfg Co Method of preventing offset in printing
US3556519A (en) * 1967-06-23 1971-01-19 Leo Keller Method and apparatus for stacking paper sheets or the like
GB1459834A (en) * 1972-02-22 1976-12-31 Owens Corning Fiberglass Corp Impregnating strands formed from a plurality of non-conducting filaments

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2545968A1 (fr) * 1983-05-10 1984-11-16 Canon Kk Appareil d'enregistrement
EP0695584A2 (fr) 1994-08-06 1996-02-07 PLATSCH, Hans G. Appareil de poudrage
EP0695584A3 (fr) * 1994-08-06 1997-04-09 Hans G Platsch Appareil de poudrage
EP0839650A1 (fr) * 1996-10-31 1998-05-06 MAN Roland Druckmaschinen AG Appareil de poudrage
EP0839651A1 (fr) * 1996-10-31 1998-05-06 MAN Roland Druckmaschinen AG Procédé pour saupoudrer, spécialement un matériau en feuille imprimé dans une machine d'impression
EP0847856A2 (fr) * 1996-12-10 1998-06-17 Heidelberger Druckmaschinen Aktiengesellschaft Dispositif pour saupoudrer des feuilles
EP0847856A3 (fr) * 1996-12-10 1998-12-30 Heidelberger Druckmaschinen Aktiengesellschaft Dispositif pour saupoudrer des feuilles
US6038998A (en) * 1996-12-10 2000-03-21 Heidelberger Druckmaschinen Ag Device for applying powder to sheets
EP0947321A1 (fr) * 1998-03-24 1999-10-06 MAN Roland Druckmaschinen AG Poudreur dans une machine d'impression

Also Published As

Publication number Publication date
JPS5871165A (ja) 1983-04-27
DE3135220A1 (de) 1983-03-17
DD203500A5 (de) 1983-10-26

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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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AK Designated contracting states

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STAA Information on the status of an ep patent application or granted ep patent

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18D Application deemed to be withdrawn

Effective date: 19840223

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Inventor name: MUZ, EDWIN, DR.

Inventor name: WEITMANN, HEINZ