EP0812685A1 - Appareil d'aspiration pour l'extraction de l'air hors d'une fente d'entrée entre une bande et un cylindre de refroidissement dans une presse rotative offset à bobine - Google Patents

Appareil d'aspiration pour l'extraction de l'air hors d'une fente d'entrée entre une bande et un cylindre de refroidissement dans une presse rotative offset à bobine Download PDF

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Publication number
EP0812685A1
EP0812685A1 EP97109068A EP97109068A EP0812685A1 EP 0812685 A1 EP0812685 A1 EP 0812685A1 EP 97109068 A EP97109068 A EP 97109068A EP 97109068 A EP97109068 A EP 97109068A EP 0812685 A1 EP0812685 A1 EP 0812685A1
Authority
EP
European Patent Office
Prior art keywords
suction
suction device
web
material web
cooling roller
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Withdrawn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
EP97109068A
Other languages
German (de)
English (en)
Inventor
Alfred Bisinger
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 EP0812685A1 publication Critical patent/EP0812685A1/fr
Withdrawn legal-status Critical Current

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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
    • B41F23/0476—Cooling
    • B41F23/0479—Cooling using chill rolls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H23/00—Registering, tensioning, smoothing or guiding webs
    • B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
    • B65H23/26—Registering, tensioning, smoothing or guiding webs longitudinally by transverse stationary or adjustable bars or rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2601/00—Problem to be solved or advantage achieved
    • B65H2601/20—Avoiding or preventing undesirable effects
    • B65H2601/21—Dynamic air effects
    • B65H2601/211—Entrapping air in or under the material

Definitions

  • the invention relates to a suction device for air extraction in the area of the inlet gap between a material web and a cooling roller of a web offset printing press.
  • the aim is therefore to keep the air gap as small as possible or to avoid it altogether.
  • the material web is cooled more quickly due to the reduced thermal resistance, which means that the number of cooling rollers can be reduced or the web speed can be increased.
  • the reduction or elimination of the air gap prevents the formation of condensate from solvent vapors and prevents the already solidified ink from being redissolved. Complex cleaning of the cooling rollers can thus be avoided.
  • a simple way to reduce the air gap is to mechanically press the web in the infeed area, for example using a pressure roller.
  • this method cannot be used in web offset printing presses for webs of material coming out of the dryer and to be cooled, since this is not yet the case would smear completely dried print image.
  • an air gap between the material web and the cooling roller is prevented as soon as it occurs, because by means of the suction nozzle, which opens a nozzle opening facing the inlet gap, both the air entrained by the material web and the cooling roller is effectively extracted. An air gap cannot then form.
  • a suction device in the area of the inlet gap between the web and the first cooling roller for generating a vacuum is known from German utility model G 94 19 702.4, but this suction device is designed to obtain smooth and undulated sheets. Concrete design features for a suction device for effectively reducing an air gap are not disclosed.
  • the cooling effect of the cooling roller is increased and solvent vapors cannot condense on the roller, so that the dried printing ink is not redissolved by condensed solvents. This prevents the ink from smearing.
  • the suction slot preferably extends over the entire cooling roller length, so that the suction device can be used for material webs of different widths.
  • the outer areas of the suction slot are open; however, this generally reduces the suction power only slightly, since the material web width mostly covers a substantial part of the cooling roll length.
  • the suction unit is advantageously connected to at least one end of the suction nozzle.
  • the suction device 10 is preferably provided at least on the first cooling roller 16 of a cooling roller arrangement connected downstream of a dryer (not shown), since the reduction of the air gap on the first cooling roller 16 is particularly important.
  • the material web 14 is transported in the direction of the arrow 18.
  • the suction device 10 consists essentially of an upper housing wall 28 adjacent to the material web 14, a lower housing wall 30 adjacent to the cooling roller 16 and a rear housing wall 32 opposite the suction slot 24, and end walls which have at least one connection 33 for a suction unit, of which in Figure 4 only one Suction hose 35 is shown.
  • the means are formed in that the rear housing wall 32 reaches the cooling roller 16 in the immediate vicinity.
  • a lateral force component acts on the material web 14, which causes the material web 14 stretched in the transport direction to spread.
  • Such a configuration of the impingement jet nozzle 40 is preferably also provided for the blow-off nozzle 36, which then, in addition to the peeling effect for the entrained air, also ensures a spreading effect for the material web 14.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
EP97109068A 1996-06-13 1997-06-05 Appareil d'aspiration pour l'extraction de l'air hors d'une fente d'entrée entre une bande et un cylindre de refroidissement dans une presse rotative offset à bobine Withdrawn EP0812685A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19623657 1996-06-13
DE1996123657 DE19623657A1 (de) 1996-06-13 1996-06-13 Saugvorrichtung zur Luftabsaugung im Bereich des Einlaufspaltes zwischen einer Materialbahn und einer Kühlwalze einer Rollenoffsetdruckmaschine

Publications (1)

Publication Number Publication Date
EP0812685A1 true EP0812685A1 (fr) 1997-12-17

Family

ID=7796879

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97109068A Withdrawn EP0812685A1 (fr) 1996-06-13 1997-06-05 Appareil d'aspiration pour l'extraction de l'air hors d'une fente d'entrée entre une bande et un cylindre de refroidissement dans une presse rotative offset à bobine

Country Status (3)

Country Link
EP (1) EP0812685A1 (fr)
JP (1) JPH1052905A (fr)
DE (1) DE19623657A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2832084A1 (fr) * 2001-11-12 2003-05-16 Vai Clecim Procede et dispositif de stabilisation du defilement a grande vitesse d'un produit en bande
DE102006027146B4 (de) * 2006-06-12 2009-06-04 Koenig & Bauer Aktiengesellschaft Verfahren zur Herabsetzung der benötigten Kühlleistung in einem Kühlwalzenständer einer Rollenrotationsdruckmaschine und eine Vorrichtung in einem Kühlwalzenständer mit Kühlwalzen
EP1795347A3 (fr) * 2005-10-28 2010-10-27 Koenig & Bauer Aktiengesellschaft Support pour cylindre de refroidissement et méthode pour refroidir une bande de papier guidée dans ce support
DE102012220431A1 (de) * 2012-11-09 2014-05-15 Koenig & Bauer Aktiengesellschaft Trocknungseinrichtung einer Druckmaschine
EP3702164A1 (fr) * 2019-03-01 2020-09-02 Ricoh Company, Ltd. Appareil, unité d'entrée d'air et appareil de sortie de liquide

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19918130A1 (de) 1999-04-21 2000-10-26 Heidelberger Druckmasch Ag Kühl- und Befeuchtungseinheit für Rotationsdruckmaschinen
KR100864029B1 (ko) * 2007-07-25 2008-10-16 주식회사 에스케이지플라스텍 산소 차단성 수축필름 제조장치

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4476636A (en) * 1980-10-27 1984-10-16 Gross Frank R Boundary air layer modification structure for heat transfer roll
WO1987005063A1 (fr) * 1986-02-21 1987-08-27 Beloit Corporation Prevention de l'ondulation de la feuille dans des sechoirs de bandes de papier
DE4211381A1 (de) * 1992-04-04 1993-10-07 Kba Planeta Ag Leiteinrichtung in Bogendruckmaschinen
EP0699527A2 (fr) * 1994-08-25 1996-03-06 MAN Roland Druckmaschinen AG Procédé et dispositif pour le guidage plat de feuilles fixées dans les pinces sur la surface courbe d'un cylindre dans une machine à imprimer rotative

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4476636A (en) * 1980-10-27 1984-10-16 Gross Frank R Boundary air layer modification structure for heat transfer roll
WO1987005063A1 (fr) * 1986-02-21 1987-08-27 Beloit Corporation Prevention de l'ondulation de la feuille dans des sechoirs de bandes de papier
DE4211381A1 (de) * 1992-04-04 1993-10-07 Kba Planeta Ag Leiteinrichtung in Bogendruckmaschinen
EP0699527A2 (fr) * 1994-08-25 1996-03-06 MAN Roland Druckmaschinen AG Procédé et dispositif pour le guidage plat de feuilles fixées dans les pinces sur la surface courbe d'un cylindre dans une machine à imprimer rotative

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2832084A1 (fr) * 2001-11-12 2003-05-16 Vai Clecim Procede et dispositif de stabilisation du defilement a grande vitesse d'un produit en bande
WO2003041885A1 (fr) * 2001-11-12 2003-05-22 Vai Clecim Procede et dispositif de stabilisation du defilement a grande vitesse d'un produit en bande
US7300018B2 (en) 2001-11-12 2007-11-27 Siemens Vai Metals Technologies Sas Method and device for stabilizing high-speed unwinding of a strip product
EP1795347A3 (fr) * 2005-10-28 2010-10-27 Koenig & Bauer Aktiengesellschaft Support pour cylindre de refroidissement et méthode pour refroidir une bande de papier guidée dans ce support
DE102006027146B4 (de) * 2006-06-12 2009-06-04 Koenig & Bauer Aktiengesellschaft Verfahren zur Herabsetzung der benötigten Kühlleistung in einem Kühlwalzenständer einer Rollenrotationsdruckmaschine und eine Vorrichtung in einem Kühlwalzenständer mit Kühlwalzen
DE102012220431A1 (de) * 2012-11-09 2014-05-15 Koenig & Bauer Aktiengesellschaft Trocknungseinrichtung einer Druckmaschine
DE102012220431B4 (de) 2012-11-09 2022-12-01 Koenig & Bauer Ag Verfahren zur Trocknung eines Bedruckstoffs mittels einer Trocknungseinrichtung einer Druckmaschine
EP3702164A1 (fr) * 2019-03-01 2020-09-02 Ricoh Company, Ltd. Appareil, unité d'entrée d'air et appareil de sortie de liquide
US11235598B2 (en) 2019-03-01 2022-02-01 Ricoh Company, Ltd. Apparatus, inlet air unit and liquid discharging apparatus

Also Published As

Publication number Publication date
JPH1052905A (ja) 1998-02-24
DE19623657A1 (de) 1997-12-18

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