EP0395864B1 - Device for removal of dust in fold apparatus of printing machines - Google Patents

Device for removal of dust in fold apparatus of printing machines 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
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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
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German (de)
French (fr)
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EP0395864A2 (en
EP0395864A3 (en
Inventor
Hermann c/o Fa. Eltex-Elektrostatik-GmbH Künzig
Günther c/o Fa. Eltex-Elektrostatik-GmbH Thoma
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Eltex Elektrostatik GmbH
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Eltex Elektrostatik GmbH
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Publication date
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Publication of EP0395864A2 publication Critical patent/EP0395864A2/en
Publication of EP0395864A3 publication Critical patent/EP0395864A3/en
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Publication of EP0395864B1 publication Critical patent/EP0395864B1/en
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Expired - Lifetime legal-status Critical Current

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    • 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.

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  • 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)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Accessory Devices And Overall Control Thereof (AREA)

Abstract

In a dedusting device for angle bars in folding apparatuses for printing machines, the angle bar (8) is surrounded, parallel to its axis and in the paper-running direction, at least in the region of one of the lateral edges of the paper-running path (10), by a plurality of successive suction chambers (3) in cross-sectionally semicircular arrangement. Discharge electrodes (6), to which a direct voltage is applied, are arranged at the paper inlet (12) in the region upstream of the first suction chamber (3a) and at the paper outlet (14) in the region downstream of the last suction chamber (3n) opposite the angle bar (8).

Description

Die vorliegende Erfindung betrifft eine Vorrichtung zum Entstauben von Wendestangen in Falzapparaten für Druckmaschinen.The present invention relates to a device for dedusting turning bars in folders for printing presses.

Falzapparate, wie sie beispielsweise für Druckmaschinen verwendet werden, weisen Wendestangen auf, an denen die Bewegungsrichtung der durchlaufenden Papierbahnen umgekehrt wird. Durch die belüfteten Wendestangen wird der an den Schnittkanten mitgeführte Schnittstaub durch die Blasluft der Wendestange und der Zentrifugalbeschleunigung abgewiesen und sedimentiert. Dieser anfallende Papierstaub beeinträchtigt die Funktionsweise der gesamten Falzapparatur, wodurch bisher in gewissen Zeitabständen eine mechanische Reinigung der Apparatur erforderlich war.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.

Aus "Papier + Kunststoff-Verarbeiter" Nr. 9, 1975, S. 58 ist ein Absaug-Reinigungsgerät für Papierbahnen bekannt, bei welchem mit Hochspannung neutralisierte Ladungsteilchen über einen Bürsten-Absaugmechanismus von der Bahn entfernt werden. Dieses Gerät ist infolge seiner Konstruktion nicht für Wendestangen von Falzapparaten geeignet.From "Paper + Plastic Processor" No. 9, 1975, p. 58 a suction cleaning device for paper webs is known, in which charge particles neutralized with high voltage are removed from the web via a brush suction mechanism. Due to its design, this device is not suitable for turning bars on folders.

Aufgabe der vorliegenden Erfindung ist es, eine gattungsgemäße Vorrichtung gemäß dem Oberbegriff des Hauptanspruches zu schaffen, durch die sich eine mechanische Reinigung erübrigt.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.

Die der Erfindung zugrundeliegende Aufgabe wird bei einer Vorrichtung gemäß dem Oberbegriff des Hauptanspruches durch dessen kennzeichnende Merkmale gelöst Dabei wird zumindest im Bereich einer der Seitenkanten der Papierbahn, an welcher eine Entstaubung erfolgen soll, die Wendestange von mehreren Absaugkammern im Querschnitt halbkreisförmig umgeben. Die Absaugkammern können aber auch Jeweils paarweise die beiden Seitenkanten der Papierbahn überdeckend angeordnet sein. Schließlich ist bei großem Staubanfall auch eine Anordnung der Absaugkammern über die gesamte Breite der durchlaufenden Papierbahn möglich.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. However, the suction chambers can also be arranged in pairs covering the two side edges of the paper web. Finally, if there is a large amount of dust, it is also possible to arrange the suction chambers over the entire width of the continuous paper web.

An die am Papiereinlauf und am Papierauslauf angeordneten Entladeelektroden wird eine hohe Gleichspannung angelegt, wobei die Wendestange vorzugsweise bezüglich dieser Gleichspannung geerdet oder isoliert sein kann über einen bestimmten Ableitwiderstand. Durch den geringen Staubanfall wird ferner die Explosionsgefahr durch Staub verringert.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.

Durch die in im Querschnitt halbkreisförmige Anordnung der Absaugkammern werden insbesondere die beim Umlauf um die Wendestange tangential abgeschleuderten Staubpartikel abgesaugt. Die Absaugwirkung läßt sich noch verbessern, wenn die Wendestange starr und hohl ausgebildet ist und zumindest im Bereich des Umschlingungswinkels der Papierbahn eine Perforation aufweist,der über das Innere der hohlen Wendestange Druckgas bzw. Druckluft zugeführt wird, die dann durch die Absaugkammern abgesaugt wird. Durch eine solche Anordnung wird die Wirkung erzielt, daß auf der Wendestange ein Luftpolster erzeugt wird,über welchem die sich über die Wendestange bewegende Papierbahn "schwimmt". Außerdem wird der UmLauf der Papierbahn um die Wendestange verbessert, weil sie eine Saugwirkung auf die Papierbahn ausübt und das Luftpolster die Reibungskräfte herabsetzt. Die an den Papierbahnkanten sich ausbildenden hohe Luftströmung begünstigt den Absaugeffekt bei der Entstaubung.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". In addition, 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.

In einer weiteren Ausführungsform der Erfindung ist auch der Zwischenraum zwischen dem Papiereinlauf und dem Papierauslauf als Absaugkammer ausgebildet. Dadurch werden auch die zwischen den Bahnen anfallenden Staubpartikel sowie die an der Rückseite der Wendestange aufgrund von Turbulenzen sich ablagernden Staubpartikel abgesaugt.In a further embodiment of the invention, the space between the paper inlet and the paper outlet is also designed as a suction chamber. As a result, the dust particles that accumulate between the webs and the dust particles deposited on the back of the turning bar due to turbulence are also extracted.

Die die Wendestange im Querschnitt in halbkreisförmiger Anordnung umgebenden Absaugkammern, die mit einer Absaugvorrichtung ,beispielsweise einer Pumpe, verbunden sind, sind an ihren zur Papierbahn bzw. zur Wendestange hin gerichteten Seiten durch eine Vielzahl von walzenförmigen Begrenzungselementen begrenzt, die in solchen Abständen voneinander angeordnet sind, daß ein hinreichender Raum zwischen ihnen zum Durchtritt der abgesaugten Staubpartikel verbleibt. Walzenförmige Begrenzungselemente haben sich für diesen Zweck als besonders wirkungsvoll erwiesen, da sie wenig Angriffspunkte für eine Ablagerung der abzusaugenden Staubpartikel bieten. Auch die im Zwischenraum zwischen dem Papiereinlauf und dem Papierauslauf liegende Absaugkammer kann zumindest teilweise an ihrer zur Wendestange hinweisenden Seite durch walzenförmige Begrenzungselemente begrenzt sein.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.

Die Erfindung wird nachfolgend unter Bezugnahme auf die einzige Figur anhand eines Ausführungsbeispiels näher erläutert.The invention is explained in more detail below with reference to the single figure using an exemplary embodiment.

Die Figur zeigt die Entstaubungsvorrichtung in einem senkrechten Schnitt durch die Längsachse der Wendestange und senkrecht zur Ebene der ein- und auslaufenden Papierbahn.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.

Die Wendestange 8 wird von der Papierbahn 10 so umlaufen, daß der Papiereinlauf 12 von unten an die Wendestange gelangt und der Papierauslauf 14 an der Oberkante der Wendestange verläuft. Dadurch ergibt sich ein Umschlingungswinkel der Papierbahn 10 um die Wendestange 8 von 180°. Die Wendestange 8, die innen hohl ausgebildet ist, weist an ihrer innerhalb des Umschlingungswinkels ausgebildeten kreisförmigen Wandung mehrere Perforationen 16 auf, durch welche Druckgase bzw. Druckluft, die in das Innere der hohlen Wendestange geleitet werden, in Richtung zur Papierbahn 10 austreten. Dadurch bildet sich zwischen der Wendestange 8 und der Papierbahn 10 ein Luftpolster 1 aus, auf welchem die Papierbahn 10 nahezu reibungsfrei ruht. Die durch die Perforationen 16 austretende Druckluft bzw. Druckgase werden unter der Papierbahn seitlich zu deren Rändern geführt.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.

Parallel zur Achse der Wendestange 8 sind in Papierlaufrichtung hintereinander mehrere Absaugkammern 3 angeordnet, die die Wendestange in im Querschnitt halbkreisförmiger Anordnung umgeben. Die Absaugkammern 3 werden zur Wendestange hin durch walzenförmige Begrenzungselemente 18 begrenzt, die in solchen Abständen angeordnet sind, daß zwischen ihnen ein Zwischenraum zum Durchtritt der abzusaugenden Staubpartikel sowie der Druckluft bzw. Druckgase verbleibt. Jede Absaugkammer 3 ist durch Seitenwände 20 und durch eine Rückwand 22 begrenzt, wobei innerhalb der Rückwand 22 ein Anschlußstutzen 24 zur Verbindung mit einer Vakuumeinrichtung, beispielsweise einer Vakuumpumpe, vorgesehen ist. Durch diese Anschlußstutzen 24 werden die zwischen den walzenförmigen Begrenzungselementen 18 in die Absaugkammern 3 eintretenden radial abgeschleuderten Staubpartikel 2 und die Gase abgesaugt.Parallel to the axis of the turning bar 8, 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.

Im Zwischenraum zwischen dem Papiereinlauf 12 und dem Papierauslauf 14 ist eine weitere Absaugkammer 3p vorgesehen, die an der von der Wendestange 8 abgewandten Seite durch einen Absaugstutzen 28 sowie durch walzenförmige Begrenzungselemente 18 begrenzt wird. Durch diese Absaugkammer werden die Partikeln 4 zwischen den Bahnen sowie die aufgrund von Turbulenzen abgelagerten Partikel 5 abgesaugt.In the space between the paper inlet 12 and the paper outlet 14, 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.

Am Papiereinlauf 12 ist im Bereich vor der ersten Absaugkammer 3a eine Entladeelektrode 6 angeordnet, an die eine hohe Gleichspannung angelegt ist. Ebenso ist im Bereich nach der letzten Absaugkammer 3n gegenüber der Wendestange 8 eine Entladeelektrode 6 angeordnet, an der gleichfalls eine hohe Gleichspannung angelegt ist. Gegenüber dieser Gleichspannung der beiden Entladeelektroden ist die Wendestange über einen Ableitwiderstand geerdet.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. Likewise, in the area after the last suction chamber 3n opposite the turning bar 8, a discharge electrode 6 is arranged, to which a high DC voltage is also applied. In relation to this DC voltage of the two discharge electrodes, the turning bar is grounded via a bleeder resistor.

Durch das Zusammenwirken der Absaugkammern 3a bis 3n und 3p mit den beiden EntLadeelektroden 6 wird eine hohe Entstaubungswirkung im Bereich der Wendestange erreicht, so daß auf eine mechanische Reinigung verzichtet werden kann und die Explosionsgefahr aufgrund von Staub verringert ist.The interaction of the suction chambers 3a to 3n and 3p with the two discharge electrodes 6 achieves a high dedusting effect in the area of the turning bar, so that mechanical cleaning can be dispensed with and the risk of explosion due to dust is reduced.

Claims (9)

  1. Device for removing the dust which arises during the cutting of material, preferably paper webs, having side edges at turning bars of folders for redirecting the paper web, preferably in printing presses,
    characterized in that
    at least
    in the region of one of the two side edges of the paper web one or more suction chambers (3a, b, c ...) are provided, of which each extends in the same direction as the turning bar (8) and one is disposed in paper running direction curved about a portion of the turning bar (8) or a plurality are individually disposed successively in paper running direction curved about a portion of the turning bar (8), and that discharge electrodes (6) are disposed at the paper inlet (12) in the region in front of the first or in front of the suction chamber (3a, 3) and at the paper outlet (14) in the region after the last or after the suction chamber (3n, 3) at the side of the paper web (10) remote from the turning bar (8).
  2. Device according to claim 1, characterized in that a high normal d.c. voltage of one or both polarities or a high a.c. voltage may be applied to the discharge electrodes (6).
  3. Device according to claim 1 or 2, characterized in that the turning bar (8) is, if need be, earthed or electrically insulated by means of a resistor.
  4. Device according to one of claims 1 to 3, characterized in that the suction chambers (3) are connected to a vacuum source.
  5. Device according to one of claims 1 to 4, characterized in that the space between the paper inlet (12) and the paper outlet (14) has a suction chamber (3p) on the inside of the paper web (10).
  6. Device according to one of claims 1 to 5, characterized in that the turning bar (8) is disposed in a non-rotatable manner, is hollow and at least in the region of the angle of wrap of the paper web (10), preferably 180°, has a perforation (10) to which compressed gas or compressed air is supplied through the interior of the hollow turning bar.
  7. Device according to one of claims 1 to 6, characterized in that the suction chambers (3) at their sides facing the paper web (10) have a plurality of cylindrical limit elements (18) disposed at intervals.
  8. Device according to one of claims 1 to 7, characterized in that the suction chambers (3a, b, c ...) are each disposed in pairs overlapping the two side edges of the paper web (10).
  9. Device according to one of claims 1 to 8, characterized in that the suction chambers (3) extend over the entire width of the paper web running through.
EP90105015A 1989-04-29 1990-03-16 Device for removal of dust in fold apparatus of printing machines Expired - Lifetime EP0395864B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3914310 1989-04-29
DE3914310A DE3914310A1 (en) 1989-04-29 1989-04-29 DEVICE FOR DRAINING DUST IN FOLDING DEVICES FOR PRINTING MACHINES

Publications (3)

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

Family

ID=6379819

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90105015A Expired - Lifetime EP0395864B1 (en) 1989-04-29 1990-03-16 Device for removal of dust in fold apparatus of printing machines

Country Status (5)

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

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DE10018010C2 (en) * 2000-04-11 2003-10-16 Eltex Elektrostatik Gmbh Dust removal device and its use
JP4723074B2 (en) * 2000-11-02 2011-07-13 日置電機株式会社 Deodorizer
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DE10164724B4 (en) * 2001-06-15 2004-04-08 Koenig & Bauer Ag Device for turning a web
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WO2010042123A1 (en) * 2008-10-10 2010-04-15 Hewlett-Packard Development Company, L.P. Automatic cleaning air idler
CN101920860B (en) * 2010-04-10 2012-02-15 佛山市宝索机械制造有限公司 Coreless paper roll rerewinder in no need of auxiliary winding plate

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Also Published As

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

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