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EP0395864B1 - Dispositif pour l'élimination de la poussière dans des plieuses de machines d'imprimerie - Google Patents

Dispositif pour l'élimination de la poussière dans des plieuses de machines d'imprimerie Download PDF

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Publication number
EP0395864B1
EP0395864B1 EP90105015A EP90105015A EP0395864B1 EP 0395864 B1 EP0395864 B1 EP 0395864B1 EP 90105015 A EP90105015 A EP 90105015A EP 90105015 A EP90105015 A EP 90105015A EP 0395864 B1 EP0395864 B1 EP 0395864B1
Authority
EP
European Patent Office
Prior art keywords
paper
turning bar
paper web
disposed
region
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.)
Expired - Lifetime
Application number
EP90105015A
Other languages
German (de)
English (en)
Other versions
EP0395864A2 (fr
EP0395864A3 (fr
Inventor
Hermann c/o Fa. Eltex-Elektrostatik-GmbH Künzig
Günther c/o Fa. Eltex-Elektrostatik-GmbH Thoma
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.)
Eltex Elektrostatik GmbH
Original Assignee
Eltex Elektrostatik GmbH
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 Eltex Elektrostatik GmbH filed Critical Eltex Elektrostatik GmbH
Publication of EP0395864A2 publication Critical patent/EP0395864A2/fr
Publication of EP0395864A3 publication Critical patent/EP0395864A3/fr
Application granted granted Critical
Publication of EP0395864B1 publication Critical patent/EP0395864B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B41F23/002—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing cleaning devices for sheets or webs

Definitions

  • the present invention relates to a device for dedusting turning bars in folders for printing presses.
  • Folders such as those used for printing presses, have turning bars on which the direction of movement of the continuous paper webs is reversed. Due to the vented turning bars, the cut dust carried along the cutting edges is rejected and sedimented by the blowing air of the turning bar and the centrifugal acceleration. This accumulated paper dust affects the functioning of the entire folding apparatus, which previously required mechanical cleaning of the apparatus at certain time intervals.
  • the object of the present invention is to provide a generic device according to the preamble of the main claim, by which mechanical cleaning is not necessary.
  • the object on which the invention is based is achieved in a device according to the preamble of the main claim by the characterizing features of the device
  • the turning bar is surrounded by several suction chambers with a semicircular cross section.
  • the suction chambers can also be arranged in pairs covering the two side edges of the paper web.
  • a high DC voltage is applied to the discharge electrodes arranged at the paper inlet and at the paper outlet, and the turning bar can preferably be grounded or insulated with respect to this DC voltage by means of a specific discharge resistance.
  • the low dust accumulation also reduces the risk of explosion from dust.
  • the arrangement of the suction chambers which is semicircular in cross section, in particular removes the dust particles thrown off tangentially during the rotation around the turning bar.
  • the suction effect can be further improved if the turning bar is rigid and hollow and, at least in the area of the wrap angle of the paper web, has a perforation which is supplied with compressed gas or compressed air via the interior of the hollow turning bar, which is then sucked off through the suction chambers.
  • Such an arrangement has the effect that an air cushion is generated on the turning bar, over which the paper web moving over the turning bar "floats".
  • the circulation of the paper web around the turning bar is improved because it exerts a suction effect on the paper web and the air cushion reduces the frictional forces.
  • the high air flow that forms at the edges of the paper web favors the suction effect during dedusting.
  • the space between the paper inlet and the paper outlet is also designed as a suction chamber.
  • the suction chambers surrounding the turning bar in cross section in a semicircular arrangement, which are connected to a suction device, for example a pump, are delimited on their sides facing the paper web or turning bar by a plurality of roller-shaped delimiting elements which are arranged at such distances from one another that there is sufficient space between them for the dust particles to pass through.
  • Roller-shaped limiting elements have proven to be particularly effective for this purpose, since they offer few points of attack for the deposition of the dust particles to be extracted.
  • the suction chamber lying in the space between the paper inlet and the paper outlet can also be at least partially delimited by roller-shaped delimiting elements on its side pointing towards the turning bar.
  • the figure shows the dedusting device in a vertical section through the longitudinal axis of the turning bar and perpendicular to the plane of the incoming and outgoing paper web.
  • the turning bar 8 is rotated by the paper web 10 so that the paper inlet 12 reaches the turning bar from below and the paper outlet 14 runs at the upper edge of the turning bar. This results in a wrap angle of the paper web 10 around the turning bar 8 of 180 °.
  • the turning bar 8 which is hollow on the inside, has on it inside the Circumferential angle formed circular wall on a plurality of perforations 16, through which compressed gases or compressed air, which are directed into the interior of the hollow turning bar, exit in the direction of the paper web 10. This forms an air cushion 1 between the turning bar 8 and the paper web 10, on which the paper web 10 rests almost without friction.
  • the compressed air or compressed gases emerging through the perforations 16 are guided laterally under the paper web to the edges thereof.
  • a plurality of suction chambers 3 are arranged one behind the other in the paper running direction, which surround the turning bar in an arrangement which is semicircular in cross section.
  • the suction chambers 3 are delimited towards the turning bar by roller-shaped limiting elements 18 which are arranged at such intervals that an intermediate space remains between them for the passage of the dust particles to be extracted as well as the compressed air or compressed gases.
  • Each suction chamber 3 is delimited by side walls 20 and by a rear wall 22, a connecting piece 24 being provided within the rear wall 22 for connection to a vacuum device, for example a vacuum pump. Through these connecting pieces 24, the radially flung-off dust particles 2 entering the suction chambers 3 between the roller-shaped limiting elements 18 and the gases are extracted.
  • a further suction chamber 3p is provided, which is delimited on the side facing away from the turning bar 8 by a suction nozzle 28 and by roller-shaped limiting elements 18. Through this suction chamber, the particles 4 between the webs and those deposited due to turbulence Particle 5 suctioned off.
  • a discharge electrode 6, to which a high DC voltage is applied, is arranged at the paper inlet 12 in the area in front of the first suction chamber 3a.
  • a discharge electrode 6 is arranged, to which a high DC voltage is also applied.
  • the turning bar is grounded via a bleeder resistor.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cleaning In General (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
  • Accessory Devices And Overall Control Thereof (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)

Claims (9)

  1. Dispositif pour l'élimination de la poussière produite lors de la découpe des bords latéraux des bandes de matériaux, plus particulièrement des bandes de papier, au niveau des barres de retournement des plieuses destinées à renvoyer la bande de papier, de préférence dans des machines d'imprimerie,
       caractérisé en ce qu'une ou plusieurs chambres d'aspiration (3a, b, c ...) est prévue dans la zone de l'un des deux bords latéraux de la bande de papier, chacune desdites chambres d'aspiration étant orientée parallèlement à la barre de retournement (8), une ou plusieurs de ces chambres ayant la forme d'un arc, vu dans le sens de l'avancement du papier, autour d'une partie de la barre de retournement (8) et en ce que des électrodes de décharge (6) sont disposées au niveau de l'entrée du papier (12) dans la zone située en face de la (première) chambre d'aspiration (3a, 3) et au niveau de la sortie du papier (14) dans la zone située derrière la dernière chambre d'aspiration (3n, 3) sur le côté de la bande de papier (10) opposé à la barre de retournement (8).
  2. Dispositif selon la revendication 1, caractérisé en ce qu'une tension élevée de courant continu, ayant l'une ou l'autre des deux polarités, ou une tension élevée de courant alternatif peut être appliquée aux électrodes de décharge (6).
  3. Dispositif selon les revendications 1 ou 2, caractérisé en ce que la barre de retournement (8) est mise à la terre, éventuellement par une résistance ou présente une isolation électrique.
  4. Dispositif selon l'une des revendications 1 à 3, caractérisé en ce que les chambres d'aspiration (3) sont reliées à une source de sous-pression.
  5. Dispositif selon l'une des revendications 1 à 4, caractérisé en ce que l'espace entre l'entrée du papier (12) et la sortie du papier (14) présente une chambre d'aspiration (3p) au niveau de la face intérieure de la bande de papier (10).
  6. Dispositif selon l'une quelconque des revendications 1 à 5 caractérisé en ce que la barre de retournement (8) est immobilisée dans le sens de rotation, en ce qu'elle est creuse et en ce qu'elle présente une perforation (16) dans la zone de contact entre la barre et la bande de papier (10), de préférence, dans la zone couvrant un angle de 180°, du gaz ou de l'air comprimé étant injecté à travers la dite perforation depuis l'intérieur de la barre de retournement creuse.
  7. Dispositif selon l'une quelconque des revendications 1 à 6 caractérisé en ce que les chambres d'aspiration (3) présentent, sur leur face orientée vers la bande de papier (10), un nombre multiple d'éléments cylindriques de délimitation (18) disposés avec un certain écartement les uns par rapport aux autres.
  8. Dispositif selon l'une quelconque des revendications 1 à 7 caractérisé en ce que les chambres d'aspiration (3a, b, c ...) sont disposées par paires, de façon à recouvrir les deux bords latéraux de la bande de papier (10).
  9. Dispositif selon l'une quelconque des revendications 1 à 8 caractérisé en ce que les chambres d'aspiration (3) s'étendent sur toute la largeur de la bande de papier.
EP90105015A 1989-04-29 1990-03-16 Dispositif pour l'élimination de la poussière dans des plieuses de machines d'imprimerie Expired - Lifetime EP0395864B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3914310A DE3914310A1 (de) 1989-04-29 1989-04-29 Vorrichtung zum abfuehren des staubes in falzapparaten fuer druckmaschinen
DE3914310 1989-04-29

Publications (3)

Publication Number Publication Date
EP0395864A2 EP0395864A2 (fr) 1990-11-07
EP0395864A3 EP0395864A3 (fr) 1991-10-30
EP0395864B1 true EP0395864B1 (fr) 1995-01-04

Family

ID=6379819

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90105015A Expired - Lifetime EP0395864B1 (fr) 1989-04-29 1990-03-16 Dispositif pour l'élimination de la poussière dans des plieuses de machines d'imprimerie

Country Status (5)

Country Link
US (1) US5027462A (fr)
EP (1) EP0395864B1 (fr)
JP (1) JPH0367654A (fr)
AT (1) ATE116598T1 (fr)
DE (2) DE3914310A1 (fr)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4120973A1 (de) * 1991-06-25 1993-01-07 Eltex Elektrostatik Gmbh Vorrichtung zum abfuehren von staub
DE4305955C1 (de) * 1993-02-26 1994-07-21 Koenig & Bauer Ag Profilleiste zum Führen einer Rollenkette
US5412836A (en) * 1993-10-06 1995-05-09 Gerber Garment Technology, Inc. Cloth cutter bed slat cleaner with vacuum removal feature
DE10004305A1 (de) * 2000-02-01 2001-08-02 Heidelberger Druckmasch Ag Verfahren und Vorrichtung zur Entfernung von Partikeln von Materialbahnen
EP1125646B1 (fr) 2000-02-01 2003-08-06 Heidelberger Druckmaschinen Aktiengesellschaft Dispositif pour enlever des particules de bandes
DE10018010C2 (de) * 2000-04-11 2003-10-16 Eltex Elektrostatik Gmbh Vorrichtung zum Entstauben swie deren Verwendung
JP4723074B2 (ja) * 2000-11-02 2011-07-13 日置電機株式会社 消臭装置
US6673003B2 (en) * 2001-05-09 2004-01-06 The Procter & Gamble Company Vacuum cleaning folding rail
DE10128823C2 (de) * 2001-06-15 2003-05-08 Koenig & Bauer Ag Vorrichtungen zum Wenden einer Bahn
DE10164724B4 (de) * 2001-06-15 2004-04-08 Koenig & Bauer Ag Vorrichtung zum Wenden einer Bahn
US6708919B2 (en) 2002-03-19 2004-03-23 Kimberly-Clark Worldwide, Inc. Turning bar assembly for use with a moving web
CN102177023A (zh) * 2008-10-10 2011-09-07 惠普开发有限公司 自动清理空气惰轮
CN101920860B (zh) * 2010-04-10 2012-02-15 佛山市宝索机械制造有限公司 无需助卷板的无芯纸卷复卷机

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2082411A (en) * 1935-08-20 1937-06-01 Carle J Merrill Paper cleaning device
US2818595A (en) * 1953-09-11 1958-01-07 Oxy Dry Sprayer Corp Apparatus for cleaning paper for printing
US3420710A (en) * 1964-09-03 1969-01-07 Du Pont Process and apparatus for cleaning webs utilizing a sonic air blast
US3434639A (en) * 1966-01-07 1969-03-25 Perkin Elmer Corp Transports for elongated material
US4026701A (en) * 1975-02-24 1977-05-31 Xerox Corporation Gas impingement and suction cleaning apparatus
US4454621A (en) * 1982-01-15 1984-06-19 Static Inc. Sheet and web cleaner
JPS5983661A (ja) * 1982-11-02 1984-05-15 Mitsubishi Heavy Ind Ltd 紙粉除去装置
JPS6135250A (ja) * 1984-07-05 1986-02-19 Hoomen Kogyo Kk 廻転する丸ブラシとエア−噴射ノズルを内蔵する紙面集塵装置
DE3436870C1 (de) * 1984-10-08 1986-05-15 U.E. Sebald Druck und Verlag GmbH, 8500 Nürnberg Luftumspülte Wendestange für Rotationsdruckmaschinen
DE3512308A1 (de) * 1985-04-04 1986-10-16 Albert-Frankenthal Ag, 6710 Frankenthal Falzapparat
EP0245526B1 (fr) * 1986-04-29 1989-04-26 Eltex-Elektrostatik Gesellschaft mbH Sonde pour le dépoussiérage de pistes en mouvement, en particulier pour des pistes en papier
US4824002A (en) * 1986-06-06 1989-04-25 Ford John W Contactless web support guide

Also Published As

Publication number Publication date
JPH0367654A (ja) 1991-03-22
DE3914310A1 (de) 1990-10-31
EP0395864A2 (fr) 1990-11-07
ATE116598T1 (de) 1995-01-15
DE59008166D1 (de) 1995-02-16
EP0395864A3 (fr) 1991-10-30
US5027462A (en) 1991-07-02
DE3914310C2 (fr) 1993-03-04

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