EP0809574B1 - Pulverisateur a poudre - Google Patents

Pulverisateur a poudre Download PDF

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Publication number
EP0809574B1
EP0809574B1 EP96937226A EP96937226A EP0809574B1 EP 0809574 B1 EP0809574 B1 EP 0809574B1 EP 96937226 A EP96937226 A EP 96937226A EP 96937226 A EP96937226 A EP 96937226A EP 0809574 B1 EP0809574 B1 EP 0809574B1
Authority
EP
European Patent Office
Prior art keywords
nozzles
powder
powder dusting
cam
lifting device
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
EP96937226A
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German (de)
English (en)
Other versions
EP0809574A1 (fr
Inventor
Hans G. Platsch
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Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0809574A1 publication Critical patent/EP0809574A1/fr
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Publication of EP0809574B1 publication Critical patent/EP0809574B1/fr
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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
    • B41F23/06—Powdering devices, e.g. for preventing set-off

Definitions

  • Powder dusting devices of this type are used to Printed matter in printing machines by the printing unit come and have gone through a drying section, to be provided with a powder layer, which in the following Stacking the printed matter stuck together prevented. For this purpose, they are close to the Transport level of the printed products arranged so that their nozzles mix the printed matter from air (air) and powder.
  • the gripping devices comprise a gripping mechanism, who hold the printed matter on the edge can, and protrude above the transport level of the printed egg certificates out. Therefore, in the known powder pollination facilities the nozzles are proportionate have a large distance from the transport level at which the gripping devices can pass. This large distance has the disadvantage, however, that the powder-air mixture, which is thrown out of the nozzles spreads in an uncontrolled manner in the printing press.
  • the object of the present invention is a powder dusting device of the type mentioned above To design that the powder-air mixture spatially more concentrated on the printed products can be.
  • the nozzles of the powder dusting device no longer fixed. Much more you get a mobility perpendicular to the transport plane of printed matter, such that they are Approaching gripping devices can "dodge" in the relatively short period in which the Gripping devices pass under the nozzles, one keep a correspondingly large distance from the transport level. However, as soon as the gripping device passes the nozzles has returned to a position in which it the transport level and thus the one to be pollinated Surfaces of printed matter are very close. The close proximity of the nozzle openings to the print products allows a more controlled pollination than this known powder dusting equipment was possible.
  • This embodiment is particularly robust and insensitive to faults.
  • two parallel cam surfaces are provided, which form a cam track in which the cam follower is included.
  • the two in parallel Cam surfaces guide the cam follower in both possible directions of movement, so that the latter without Using additional components to perform its function can.
  • the lifting device is mechanically separated from the control device. Latter can then be easily electrical / electronic To run. You can do this at the transport level arranged to include the first sensor when approaching a gripping device to the nozzles a first signal to the lifting device, which the lifting device causes the nozzle to move to the first position.
  • the sensor can be any device which indicates the physical proximity of the gripping device responds, e.g. B. all forms of proximity switches, Light barriers, but also around mechanical switches, the actuator of the passing gripping devices is acted upon.
  • the "reset" of the nozzles in that of the transport level can in turn be different Ways are done:
  • control device comprises a second sensor arranged on the transport plane, the second when a gripping device moves away Output signal to the lifting device, which the lifting device causes the nozzle to move to the second position.
  • control device a timer contains which of the first signal of the first sensor is initiated and after a certain period of time emits a second signal, which the lifting device Is fed and causes the nozzles in to bring the second position.
  • This variant is likely generally cheaper than the one mentioned above, be control device working with two sensors.
  • the time period defined by the timer between The occurrence of the first and second signals becomes like this chosen that at the respective speed of the Transport system is sufficient, the gripping device to the To let nozzles pass.
  • the first variant is characterized in that the Nozzles are rigidly connected to a manifold and with this forms a movable unit that over a flexible hose connected to the mixing channel is.
  • This variant comes with a single flexible Hose out, both in terms of material usage as well as in terms of assembly costs is.
  • one that is rigidly connected to the nozzle means Manifold in general also a little bigger moving mass.
  • an embodiment of the invention be selected in which the nozzles have a slight Support rod are connected to a movable unit and each nozzle over a flexible hose with one fixed manifold is connected, which in turn communicates with the mixing device.
  • the manifold not moving; the cohesion of the nozzle assembly, which combines the various nozzles, takes place over the support rod which is much lighter than one Distribution pipe can be.
  • a connection between each nozzle and the manifold be made using a flexible hose.
  • An embodiment of the invention is particularly preferred, which has a sensor that the position of the Nozzles are detected and an output signal is generated, which the mixer only works for as long as how the nozzles in the second position (close to the transport level). Pollination is so interrupted as long as the nozzles for passing one Gripping device are raised to the first position; in this way, the Above mentioned disadvantages avoided, which are known Find powder pollination facilities.
  • the lifting device is particularly easy to control, when they swing between the nozzles the two positions.
  • the lifting device has a single or multi-armed lever which carries the nozzles in a first position and in a second point is driven by a cam surface.
  • the movement between the nozzles is advantageously between the cam surface serving the two positions is so formed and driven that one revolution of the cam surface of the Movement of the transport system of the printing press around the distance between two successive gripping devices corresponds.
  • FIG 1 is the outlet area of a printing press shown. To the right of the area shown to think the actual printing unit. The printed matter are using the entire printing press With the help of a conveyor system that moves two endless Conveyor chains 1 includes.
  • the visible in Figure 1 Conveyor chain 1 lies behind the drawing level; a corresponding is endless conveyor chain 1, parallel to that shown Conveyor chain 1 running, in front of the drawing level of Figure 1 attached.
  • the two conveyor chains 1 are through a large number of gripping devices 2 with one another connected, which is perpendicular to the plane of the figure 1 extend and on each of which a gripping mechanism is attached for capturing a printed product.
  • the Construction of such gripping devices 2 is on and for known.
  • the gripping devices 2 are along the conveyor chains 1 arranged at regular intervals from each other and transport the printed products from the not shown Infeed area of the printing press through the also not shown printing unit through and then in the sense of arrow 3 on one in Figure 1 only schematically indicated powder dusting device 4 over to one Stack 5 on which they are dropped.
  • the drying section On which the still pressurized printed products largely dried, for example in the area of the conveying path provided with the reference symbol 6 '. Since the printed matter on the drying line, their length is limited for economic reasons must be kept, not completely dried be that mutual sticking excluded the powdering device 4 is provided, with which a powder layer on the printed products is applied. This prevents sticking together in stack 5 of the superimposed printed matter.
  • FIG. 1 An embodiment of such a powder dusting device 4 is larger in Figures 2 and 3 shown to scale.
  • a plurality of nozzles 6 that over a common manifold 7 are fed on the transport level of the conveyed by the conveyor chains 1 Printed products.
  • the manifold 7 is via a flexible hose 16 with a Mixing device 8 connected, in which the powder, in generally a corn starch product mixed with air and so is conveyed to the nozzles 6.
  • a sprocket 9 is in the machine housing, which is not is shown in more detail by means of an axle stub 10 rotatably mounted and engages in the transport chain 1 one behind the plane of the drawing in Figures 2 and 3 is moved in the direction of arrow 3.
  • the circumference of the sprocket 9 corresponds to the distance below which the gripping devices 2 of the conveyor chains 1 are worn.
  • cam track 11 which are parallel to each other has extending cam surfaces 11a, 11b.
  • the cam track 11 has the following shape:
  • the cam track 11 follows an arc that is concentric with the center of rotation of the chain wheel 9 and has a relatively small radius.
  • the angle range ⁇ is adjoined on both sides by angles ⁇ 1 and ⁇ 2 transition areas in which the cam track 11 changes from the smaller radius to a larger radius.
  • the cam track 11 follows an arc that is also concentric with the center of rotation of the chain wheel 9, but has a larger radius.
  • the distributor pipe 7 is with a cam follower Serving pin 12 projecting in the axial direction provided which engages in the cam track 11.
  • the Distribution pipe 7 and thus the nozzles 6 are between two Guides 13, indicated by dashed lines in the drawing are movable in the vertical direction. The order is so that the vertical position of the nozzles 6 through the cam track 11, ultimately through the rotational position the sprocket 9 is determined.
  • the distance between two successive gripping devices 2 on the transport chain 1 corresponds to the scope of the Sprocket 9 or an integer multiple thereof.
  • the sprocket 9 is mounted so that the cam track 11th in the angular range ⁇ , in which they are smaller than the circular arc Diameter follows, in engagement with the cam follower 12th of the distributor pipe 7, when under the nozzles 6 a gripping device 2 passes by.
  • the powdering device 4 described above works as follows:
  • the cam follower 12 of the distributor tube 7 gets into that transition region of the cam track 11 in the chain wheel 9, which is assigned to the lagging angular range ⁇ 2 .
  • the cam follower 12 so that the distributor pipe 7 and the nozzles 6 fastened thereon, is again transferred into that area of the cam track 11 which has the larger radius.
  • This transfer of the cam follower 12 is accompanied by a lowering of the distributor pipe 7, which is displaceable between the guides 13, and the nozzles 6 into the position shown in FIG. 3.
  • the conditions are such that the nozzles 6 briefly from the transport level of the printed products pull back to pass a gripping device 2 and then immediately afterwards return to a position adjacent to the transport level.
  • a sensor 15 which detects the presence of the lowered manifold 7 or the lowered nozzles 6 notes.
  • the one shown in the drawing Embodiment of the sensor 15 is a reflection light barrier.
  • All types of proximity switches or a mechanical one Microswitch, the actuator in Path of movement of the nozzles 6 or one with it moving component is.
  • the sensor 15 inputs the mixing device 8 Switch-on signal.
  • the mixing device 8 then delivers the powder-air mixture through the flexible hose 16 to the distributor pipe 7, from which they go through the nozzles 6 emerges in the direction of the printed products. Poses the sensor 15, on the other hand, as shown in FIG. 2, fixed, that the nozzles 6 and the manifold 7 for passage a gripping device 2 are raised up there he to the mixing device 8 a shutdown signal, so that no powder is blown out of the nozzles 6 during this time becomes.
  • the cam device which is lifting and lowering of the nozzles 6 causes as a cam track 11 configured two opposite cam surfaces 11a and 11b.
  • the cam follower 7 is thus both in Direction upwards as well as downwards between the two cam surfaces 11a and 11b positively.
  • the nozzles 6 and the manifold 7 are by a pretensioner, e.g. a feather, after applied above, so that the cam follower 12 without Counter-guidance is in contact with this one cam surface 11a remains.
  • Embodiment of the powder dusting device 4 takes place the control of the lifting and lowering movement on electronic Ways.
  • the distributor pipe 7 with the nozzles 6 on a pneumatic cylinder or other linear actuator e.g. a magnetic drive
  • a pneumatic cylinder or other linear actuator e.g. a magnetic drive
  • the Approach of a gripping device 2 to the nozzles 6 by a first sensor, e.g. B. a (reflection) light barrier detected.
  • This first sensor enters first signal to the lifting device, which then the Nozzles 6 and the manifold 7 in the upper position moves.
  • the gripping device 2 passes through a second sensor, which is similar how the first sensor can be constructed.
  • This second The sensor indicates when passing the gripping device 2 Lifting device sends a second signal, following which the nozzles 6 and the distributor pipe 7 back into the transport plane of the printed products returns to the adjacent position.
  • the sensors which act on the lifting device, also for switching on and off the mixing device 8 can be used.
  • Embodiment of the powder moistening device 4 becomes a complete nozzle assembly consisting of a distributor pipe 7 and the nozzles 6, back and forth in the vertical direction moved.
  • a single flexible one is sufficient Hose 16, which is the connection between the Mixing device 8 and the manifold 7 produces. It may be beneficial to reduce the moving masses, the manifold 7 stationary on Attach machine frame and only the nozzles that are in in this case by a very light connecting rod are held together to reciprocate vertically. In this embodiment of the invention everyone leads Nozzle a flexible hose to the manifold.
  • the lifting device comprises a double-armed Lever 17, on one arm 18 of which the nozzles 6 are arranged are and the other arm 19 of a cam surface 11a, 11b is driven, for which purpose it is driven by a drive pin 20 engages in the cam track 11.
  • the lever 17 is on a pin 21 fixed to the frame.
  • the sprocket 9 rotates the cam track 11 synchronously Movement of conveyor chains 1, and as a result obtained the nozzles swing from one to the other Position.
  • the cam track 11 is attached to the chain wheel 9, the extent of which is the distance between two successive ones Gripping devices 2 corresponds.
  • the phase position of the sprocket 9 is in the assembly on the phase position the gripping devices 2 matched, so that again it is ensured that the nozzles 6 during the passage a gripping device 2 each by a sufficient Distance from that covered by the printed matter Web to be lifted off.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Discharge By Other Means (AREA)

Claims (14)

  1. Pulvérisateur à poudre pour une imprimeuse avec
    a) de nombreuses buses à l'aide desquelles un mélange poudre-air porteur est dirigé contre les produits imprimés déplacés par des dispositifs de saisie du système de transport de l'imprimeuse.
    b) un dispositif mélangeur dans lequel la poudre est mélangée à de l'air pour la production du mélange poudre-air porteur;
    c) au moins une conduite de raccordement qui relie le dispositif mélangeur aux buses, caractérisé par
    d) un dispositif de levage (9 à 13) qui peut déplacer les buses (6) en va-et-vient entre deux positions, à savoir
    da) une première position relativement éloignée du niveau de transport des produits imprimés, et
    db) une seconde position relativement proche du niveau de transport des produits imprimés et
    e) un dispositif de commande (11, 12) captant la position du dispositif de saisie (2) qui agit avec le dispositif de levage (9 à 13) de telle manière que celui-ci amène les buses (6) dans la première position tant qu'un dispositif de saisie (2) se trouve à proximité des buses (6), et qui amène les buses (6) dans la deuxième position lorsque le dispositif de saisie (2) se trouve a distance suffisante des buses (6).
  2. Pulvérisateur a poudre selon la revendication 1, caractérisé en ce que le dispositif de levage et le dispositif de commande sont assemblés dans un mécanisme à came (9 à 13) qui comprend :
    a) au moins une roue à chaínes (9) agissant avec une chaíne de transport (1) du système de transport ;
    b) au moins une surface à came (11a, 11b) fermée en soi et entraínée par la roue à chaínes (9) ;
    c) au moins un membre de poursuite à came (12) raccordé aux buses (6) qui agit avec la surface à came (11a, 11b) ;
    d) un guidage (13) qui guide les buses (6) sur la voie entre leurs deux positions.
  3. Pulvérisateur à poudre selon la revendication 2, caractérisé en ce que deux surfaces à came parallèles (11a, 11b) sont prévues, qui forment une voie à came (11) dans laquelle est logé le membre de poursuite à came (12).
  4. Pulvérisateur à poudre selon la revendication 2, caractérisé en ce qu'une seule surface à came est prévue et en ce que le membre de poursuite à came est pressé contre l'une des surfaces à came par un dispositif de précontrainte.
  5. Pulvérisateur à poudre selon la revendication 1, caractérisé en ce que le dispositif de levage est séparé mécaniquement du dispositif de commande et en ce que ce dernier comprend au moins un premier capteur placé sur le niveau de transport et qui transmet un premier signal au dispositif de levage lors du rapprochement d'un dispositif de saisie vers les buses, signal qui fait que le dispositif de levage amène la buse dans la première position.
  6. Pulvérisateur à poudre selon la revendication 5, caractérisé en ce que le dispositif de commande comprend un deuxième capteur placé sur le niveau de transport qui transmet un deuxième signal au dispositif de levage lors du mouvement de reirait d'un dispositif de saisie, signal qui fait que le dispositif de levage amène la buse dans la deuxième position.
  7. Pulvérisateur a poudre selon la revendication 5, caractérisé en ce que le dispositif de commande contient un relais temporisateur activé par le premier signal du premier capteur et qui donne un second signal après écoulement d'un certain temps, second signal qui est amené au dispositif de levage et qui fait que celui-ci amène les buses dans la deuxième position.
  8. Pulvérisateur à poudre selon l'une des revendications précédentes, caractérisé en ce que les buses (6) sont raccordées à un tuyau distributeur (7) de façon rigide et forment avec celui-ci une unité mobile raccordée au dispositif mélangeur (8) à l'aide d'un tuyau flexible (16).
  9. Pulvérisateur à poudre selon l'une des revendications 1 a 7, caractérisé en ce que les buses sont reliées en une unité mobile à l'aide d'une barre porteuse légère et chaque buse raccordée à un tuyau distributeur fixe au moyen d'un tuyau flexible, tuyau distributeur qui de son côté est en liaison avec le dispositif mélangeur.
  10. Pulvérisateur à poudre selon l'une des revendications précédentes, caractérisé en ce qu'il présente un capteur (15) qui enregistre la position des buses (6) et qui génère un signal de sortie, lequel ne met en fonction le dispositif mélangeur (8) que pour la période de temps pendant laquelle les buses (6) se trouvent dans la deuxième position.
  11. Pulvérisateur à poudre selon la revendication 1, caractérisé en ce que le dispositif de levage déplace les buses dans un mouvement de rotation entre les deux positions.
  12. Pulvérisateur à poudre selon la revendication 11, caractérisé en ce que le dispositif de levage comprend un levier à un ou plusieurs bras, qui, au premier endroit, porte les buses (6) et sur lequel a prise, à un second endroit, une surface à came (11) entraínée de façon synchrone à la vitesse de transport des produits imprimés.
  13. Pulvérisateur à poudre selon l'une des revendications 2 à 12, caractérisé en ce que la surface à came (11a, 11b), pour continuer le mouvement de la chaíne de transport (1), effectue un cycle dont la distance correspond à l'intervalle entre deux dispositifs de saisie (2) successifs.
  14. Pulvérisateur à poudre selon la revendication 2 associée à la revendication 13, caractérisé en ce que la circonférence de la roue à chaínes (9) correspond à la distance entre des dispositifs de saisie (2) successifs.
EP96937226A 1995-12-14 1996-10-25 Pulverisateur a poudre Expired - Lifetime EP0809574B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19546720A DE19546720A1 (de) 1995-12-14 1995-12-14 Puderbestäubungseinrichtung
DE19546720 1995-12-14
PCT/EP1996/004635 WO1997021545A1 (fr) 1995-12-14 1996-10-25 Pulverisateur a poudre

Publications (2)

Publication Number Publication Date
EP0809574A1 EP0809574A1 (fr) 1997-12-03
EP0809574B1 true EP0809574B1 (fr) 1999-05-26

Family

ID=7780139

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96937226A Expired - Lifetime EP0809574B1 (fr) 1995-12-14 1996-10-25 Pulverisateur a poudre

Country Status (5)

Country Link
US (1) US5823112A (fr)
EP (1) EP0809574B1 (fr)
JP (1) JPH11500376A (fr)
DE (2) DE19546720A1 (fr)
WO (1) WO1997021545A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009041225A1 (de) 2009-09-11 2011-03-24 Heidelberger Druckmaschinen Ag Druckmaschine mit einer Pudervorrichtung

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19636658C2 (de) * 1996-09-10 2000-12-14 Roland Man Druckmasch Vorrichtung zur Oberflächenbehandlung von bogenförmigen Bedruckstoffen
JP2001239645A (ja) * 2000-03-02 2001-09-04 Komori Corp 枚葉輪転印刷機のパウダー装置
US20050045055A1 (en) * 2003-08-28 2005-03-03 Daniel Gelbart Security printing method
DE102011076067A1 (de) 2011-05-18 2012-11-22 manroland sheetfed GmbH Verfahren zum Auslegen von Bogenmaterial in einer Bogenverarbeitungsmaschine und Auslegervorrichtung
WO2015062625A1 (fr) * 2013-10-28 2015-05-07 Hewlett-Packard Indigo Bv Application d'un fluide sur un substrat

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1555797A (en) * 1924-09-12 1925-09-29 Allen L Grammer Spraying apparatus
US4332198A (en) * 1980-06-23 1982-06-01 Schmoeger Duane A Printing press with an air assist sheet delivery and powdering system
DE3143089A1 (de) * 1981-10-30 1983-05-26 Heidelberger Druckmaschinen Ag, 6900 Heidelberg Vorrichtung zum trocknen von bedruckten bogen an offsetdruckmaschinen
US4807528A (en) * 1987-06-10 1989-02-28 Airtech Company, Inc. Offset prevention means for printing presses
US5001980A (en) * 1988-12-29 1991-03-26 Komori Printing Machinery Co., Ltd. Delivery apparatus for sheet-fed printing press
JP2870660B2 (ja) * 1990-03-06 1999-03-17 理想科学工業株式会社 孔版印刷装置
JP3025361B2 (ja) * 1992-02-07 2000-03-27 理想科学工業株式会社 孔版印刷装置のブレード式スキージ装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009041225A1 (de) 2009-09-11 2011-03-24 Heidelberger Druckmaschinen Ag Druckmaschine mit einer Pudervorrichtung

Also Published As

Publication number Publication date
US5823112A (en) 1998-10-20
JPH11500376A (ja) 1999-01-12
DE59602001D1 (de) 1999-07-01
EP0809574A1 (fr) 1997-12-03
WO1997021545A1 (fr) 1997-06-19
DE19546720A1 (de) 1997-06-19

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