EP0442903B1 - Powdering device for printed articles - Google Patents

Powdering device for printed articles Download PDF

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Publication number
EP0442903B1
EP0442903B1 EP89911806A EP89911806A EP0442903B1 EP 0442903 B1 EP0442903 B1 EP 0442903B1 EP 89911806 A EP89911806 A EP 89911806A EP 89911806 A EP89911806 A EP 89911806A EP 0442903 B1 EP0442903 B1 EP 0442903B1
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EP
European Patent Office
Prior art keywords
nozzle bodies
adjustment means
nozzle
spacing adjustment
spacing
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EP89911806A
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German (de)
French (fr)
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EP0442903A1 (en
Inventor
Hans G. Platsch
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Individual
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Priority to AT89911806T priority Critical patent/ATE85003T1/en
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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
    • B41F23/04—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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
    • B05B15/60—Arrangements for mounting, supporting or holding spraying apparatus
    • B05B15/68—Arrangements for adjusting the position of spray heads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/14—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas designed for spraying particulate materials
    • B05B7/1481—Spray pistols or apparatus for discharging particulate material
    • B05B7/1486—Spray pistols or apparatus for discharging particulate material for spraying particulate material in dry state

Definitions

  • the invention relates to a device for dusting printed products with fine powder according to the preamble of claim 1.
  • Devices of this type are installed over the conveying path of the printed products on printing presses and dust the printed side of the freshly printed product with fine powder, so that the printed products do not stick together over the color layers when they are placed one on top of the other.
  • the fine powder particles of corn starch, CaCO3 or sugar have a particle size of usually between 10 and 50 microns and are atomized in an air stream. This mist is directed against the printed products via generally strip-shaped nozzle bodies, the axis of the strip bodies running parallel to the conveying direction of the printed products and a plurality of such nozzle bodies being arranged parallel to one another above the conveying path of the printed products.
  • the overall fog curtain produced by the nozzle body arrangement must be so wide that it still completely covers the widest printed products. If smaller printed products are printed, one must either accept that the part of the powder curtain that is located outside the printed products is uselessly generated and enters machine parts located below the path of the printed products. This is disadvantageous both in terms of the contamination of the machine and in terms of the cost of the powder material. If, on the other hand, you rebuild the nozzle body arrangement so that the width of the powder curtain corresponds to the width of the printed products, this means a longer stop of the printing press, which is only possible at very high Conditions is economically justifiable.
  • US Pat. No. 4,622,896 discloses a device for dusting printed products, in which a nozzle strip extending transversely to the conveying direction of the printed products has a plurality of nozzles attached at predetermined locations, each of which can be individually closed by snap-on annular caps. In this way, parts of the printed products that are not printed can be kept free from pollination. These caps are moved manually and under visual control, which is difficult for a pollinator housed inside a larger printing press.
  • the present invention therefore provides a device for dusting printed matter with fine powder according to the preamble of claim 1, in which the width of the powder curtain produced by the nozzle body arrangement can be changed at short notice and without complex adjustment work.
  • a pollination device In a pollination device according to claim 5, one can not only adjust different nozzle bodies strictly synchronously by the same distances, but also by different distances that are in a predetermined relationship to each other. Nevertheless, only a single mechanically moving drive rod is required, so that the mechanical structure of the pollination device is simple.
  • a pollination device In a pollination device according to claim 7, there is a finely adjustable soap adjustment of the nozzle body in conjunction with a very simple mechanical construction of the switching couplings which control the adjustment movement of the individual nozzle bodies.
  • a mechanically strictly coupled adjustment of the individual nozzle bodies is obtained in a mechanically particularly simple manner.
  • long strip-shaped nozzle bodies can also be placed at an angle to the conveying direction of the printed products.
  • Each of the nozzle bodies then sweeps over a transverse area of the printed products, which corresponds to the opening angle of the partial curtain produced by it plus the transverse offset of its ends.
  • the width of the powder mist generated by the individual nozzle bodies is automatically adjusted to the respective spacing of the nozzle bodies.
  • the powder dusting device shown in FIGS. 1 and 2 has two substantially U-shaped bearing frames 10, 12, each of which has a fastening plate 14 and lateral bearing legs 16, 18.
  • bores 20 are provided, in which mounting screws can be accommodated, which serve to attach the bearing frames 10, 12 to horizontal struts of a printing press or to attach the bearing frames 10, 12 to a support plate, not shown in the drawing, which then in turn is attached to a printing press.
  • a square guide rail 22 is fixed in the lower section in the bearing legs 16, 18.
  • a threaded spindle 26 is mounted parallel to the guide rail 22 in the bearing legs 16, 18 using axial / radial bearings 24.
  • This has a square drive section 28 which is mechanically coupled to an electric motor 30.
  • the left ends of the threaded spindles 26 carry chain wheels 32, over which a chain 34 runs.
  • the threaded spindle 26 of the rear bearing frame 12 which is not connected to a motor, is coupled to the driven threaded spindle 26 of the front bearing frame 10.
  • the guide heads 36 are slidable.
  • the guide heads 36 each have on the underside a T-shaped cross section running perpendicular to the drawing plane of FIG. 1 and having a complementary cross section with a rotationally symmetrical holding pin 40 which can be displaced and rotated and which moves from the top of an assigned nozzle strip, indicated overall by 42 is at the top.
  • the nozzle strips 42 each have an internal distribution channel 44 which runs in the longitudinal direction of the strip and which, via a plurality of dispensing nozzles pointing downward, emits a powder mist against printed products which pass under the nozzle strip arrangement.
  • the guide heads 36 In its upper section, the guide heads 36 have a threaded bore 48 into which a locking screw 50 can be screwed, the tip of which works into the top of the guide rail 22. Of the various guide heads 36, only one is equipped with a locking screw 50; in the embodiment shown in FIG. 1, this is the middle guide head. This selected guide head serves as a fixed point when the nozzle bar 42 is adjusted in the transverse direction.
  • a parallelogram scissor grille designated overall by 52, which has grating arms 54, 56 laid crosswise.
  • the lattice links 54, 56 are each articulated to one of the guide heads 36 at the crossover point by means of a pivot pin 58.
  • the free ends of the lattice links 54, 56 are connected by pivot pins 60, 62.
  • One of the guide heads 36 which differs from the guide head 36 braked by the locking screw 50, in the exemplary embodiment shown in FIG. 1 the leftmost of the guide heads 36, carries a drive head 64 which is provided with a threaded bore 66 which is on the threaded spindle 26 is running.
  • the distance between the nozzle strips 42 can thus be increased or decreased, the adjustment movement taking place symmetrically to the braked central guide head and thus also the central nozzle strip.
  • the rightmost guide head in Fig. 1 were braked, one would get a constant increase or decrease in the spacing between the nozzle strips, based on a fixed point, which is the same as in Fig. 1 and 2, if the powder dusting device shown in Figs Figure 1 is the right end of the guide rail 22.
  • the distributor channels 44 of the various nozzle strips 42 are connected to a mist generator (not shown in more detail) via flexible hoses 68.
  • the powder mist is obtained by atomizing fine particles of 10 to 50 microns, preferably 15 to 20 microns from corn starch, CaCO3 or sugar in a stream of compressed air.
  • the powder dusting device shown in FIGS. 1 and 2 can be adjusted simply by exciting the electric motor 30 in one or the other sense of rotation for the dusting of printed products of different widths.
  • the printed products of different widths can either be fed to the center of the printing machine (central guide head braked) or fed in that their one side edges run equally on one side of the printing press (edge guide head braked).
  • the threaded spindle 26 now has two spindle sections 26a and 26b provided with opposite threads, which work together with two drive heads 64 which are placed on the two peripheral guide heads 36. These peripheral guide heads are thus inevitably moved symmetrically to the center plane of the powdering device.
  • helical springs 70 are now provided, each of which is inserted between adjacent guide heads 36 arranged on the guide rail 22 with slight sliding play.
  • the coupling chain 34 provided in the exemplary embodiment according to FIGS. 1 and 2 is also omitted.
  • the drive sections 28 of both threaded spindles 26 are each connected to an associated electric motor 30 or 30 ', so that the distance between the guide heads and nozzle strips for the front and rear bearing frames can be set differently. It is also possible to achieve an inclined position of the nozzle strips 42 with respect to the conveying direction of the printed products (from top to bottom in FIG. 4), as shown in FIG. 4.
  • Each of the nozzle strips 42 can thus sweep over a transverse area of the printed products which is larger than the cone opening angle of the corresponds to fog generated by the individual nozzle strip 42.
  • each of the guide heads 36 is assigned its own drive head 64 which runs on the threaded spindle 26.
  • the drive heads 64 contain specially designed clutches, by means of which they can optionally be connected to the threaded spindle 26 in a drive-locking manner or can be separated therefrom.
  • These switching clutches which will be described in more detail with reference to FIG. 6, are controlled via control lines 72 using a computer 74, which works together with a keypad 76, a monitor 70 and a multiple light barrier 80 covering the conveying path of the printed products in the transverse direction.
  • the width of the powder mist generated overall by the nozzle bar arrangement can thus either be set automatically in accordance with the width of the printed products measured by the multiple light barrier 80 or selected in accordance with values set on the keypad 76.
  • a two-armed lever 82 is rotatably mounted in the drive heads 64 about a horizontal pin 83.
  • the lever arm 84 carries at one end a nut segment 86 which can run on the threaded spindle 26.
  • a second lever arm 88 of the lever 82 carries a brake body 90 which cooperates with one side surface of the guide rail 22.
  • An armature plate 92 is also attached to the lever arm 84 and is connected to an electromagnet 94 cooperates, which is attached to the housing of the drive head 64, designated 96.
  • a helical compression spring 98 is clamped between the armature plate 92 and the end face of the electromagnet 94, by means of which the lever 82 is pretensioned into the position shown in FIG. 6, in which the brake body 90 rests on the guide rail 22 and the nut segment 86 is disengaged from the threaded spindle 26 is.
  • the electromagnet 94 is energized, on the other hand, the brake body 90 is lifted off the guide rail 22 and the nut segment 86 is placed on the threaded spindle 26. Now the drive head 64 under consideration and the guide head 36 connected to it and the nozzle bar 42 carried by it are adjusted according to the rotation of the threaded spindle 26.
  • the computer 74 works in such a way that it excites the electric motor 30 for as long as an adjustment movement of drive heads 64 is required at all.
  • the electromagnets 94 of the various drive heads 64 are, however, only excited over part of this period of time, as is necessary to adjust the drive heads 64 to different degrees.
  • the delivery characteristic of the nozzle strips is also changed synchronously, that is to say the opening angle of the Mist cone enlarged with increasing distance between the nozzle bars, reduced with decreasing nozzle bar distance.
  • FIG. 7 shows a mechanical solution for this compulsory change in the jet characteristic in synchronism with the distance between the nozzle strips.
  • the nozzle strips each have side channel walls 102, 104 articulated via joints 100, which delimit a variable nozzle opening 106.
  • the lower ends of the channel walls 102, 104 of adjacent nozzle strips 42 are each connected by horizontal coupling plates 108, specifically via joints 110.
  • the width of the nozzle opening 106 is automatically increased when the drive heads 64 are moved apart, and is automatically reduced when the drive heads 64 are brought closer together.
  • the coupling plates 108 together with the channel walls 102, 104 form a variable cover of the powder-filled space upwards.
  • the threaded spindle 26 is now held non-rotatably by the bearing legs 16, 18, and the drive heads 64 each contain an independently controllable drive motor 112 which is controlled by the computer 74 in one or the other direction of rotation.
  • the drive motor 112 is fixed to the housing 96 and its shaft carries a helical gear 114, which with a corresponding combs helical toothed ring 116 which is applied to the outside of a threaded sleeve 118.
  • the threaded sleeve 118 has a bearing collar 120 which is axially distant from the ring gear 116 and which is mounted in a side wall of the housing 96 via an axial / radial bearing 122.
  • the threaded sleeve 118 runs on the threaded spindle 26, and by driving the drive motor 112 in one or the other direction of rotation, the drive head 64 under consideration can thus be moved to the left or right on the threaded spindle 26.
  • the computer 74 takes care of the coordination of the movement of the different drive heads 64.
  • the same adjustment device is provided for the second ends of the nozzle bodies 42 as is shown in FIGS. 8 and 9.
  • the control of the drive heads 64 is likewise carried out by the computer 74, the drive control 64 lying one behind the other in the conveying direction of the printed sheets being normally acted upon by the same control signals.
  • the threaded spindles 26 'and 26 ⁇ are inevitably coupled by a chain drive 126, so run at the same speed.
  • an intermediate piece 128 is inserted between the drive head 64 and the guide head 36, which overlaps the threaded spindle 26' with play.
  • the drive heads 64 for the different nozzle strips work together with four different threaded spindles 261, 262, 263 and 264.
  • the threaded spindle 262 runs twice as fast as the threaded spindle 261, the threaded spindles 263 and 264 three or four times as fast.
  • stepper motors 1301, 1302, 1303 and 1304 work on the threaded spindles.
  • the stepper motor 1304 receives its control pulses via a frequency divider 1324 with a partial ratio "3" from the output of a pulse generator 134.
  • the frequency divider 1324 thus allows every third of the pulses provided by the pulse generator 134 to pass through.
  • the stepper motors 1303, 1302 and 1301 are applied via frequency dividers 1323, 1322 and 1321 with the control pulses of the pulse generator 134, the partial ratio of which is "4", "6" and "12".
  • the pulse generator 134 itself is a controllable pulse generator and receives a signal via a line 136 from the computer 74, which specifies the number of pulses to be emitted by the pulse generator 134. This can e.g. by passing a binary-coded number, which presets a counter contained in the pulse generator 134, the pulse generator each time after receiving such a number begins to generate pulses which are simultaneously given to a down-counter terminal of this internal counter and stop the pulse output when the Counter is reset to zero.
  • a single electric motor 30 can again be used to drive a threaded spindle 26.
  • the threaded spindle 26 then works directly on the threaded spindle 261, while the threaded spindles 262 to 264 are coupled to the threaded spindle 26 via gears 1382 to 1384.
  • the gearboxes 1382, 1383 and 1384 provide a speed ratio by a factor of "2", "3" and "4".
  • the gears 138 can be toothed gears, belt gears or chain gears.
  • FIG. 12 is very similar to that according to FIG. 11, only the stepper motors 130 i work on driven deflection wheels 140 i running in the bearing leg 18, the one together with deflection wheels 142 i arranged freely running in the bearing leg 16 and belts 144 i running over these wheels form an associated drive head 64 i working belt drive.
  • the drive heads 64 i are assigned hydraulic actuating cylinders 146 i , which are supplied with pressure medium via flow dividers 148 i and a control valve 150.
  • the flow dividers 148 i ensure that the piston rods of the actuating cylinders 1481 to 1484 move again in the ratio 1: 2: 3: 4.
  • these are fixed using clamping pieces 152 in the vicinity of the associated drive head 64 on the associated guide rail 22, the actuating cylinders lying on both sides of the device centering in opposite directions, which is due to the corresponding interchanging of their working lines 154 and 156 is compensated.
  • the total number of nozzle strips 42 can be increased or decreased in the exemplary embodiments described above, in which case the different degrees of the adjustment movements are selected in accordance with the changed number of strips.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Coating Apparatus (AREA)
  • Spray Control Apparatus (AREA)
  • Treatment Of Fiber Materials (AREA)

Abstract

A powdering device for sprinkling fine powder on printed articles has a plurality of mutually parallel nozzles (42) which spray the powder. The spacing of the nozzles (42) can be varied by means of a threaded drive (26, 66) and a slidable parallelogram lattice grate (52).

Description

Die Erfindung betrifft ein Gerät zum Bestäuben von Druckerzeugnissen mit feinem Puder gemäß dem Oberbegriff des Anspruches 1.The invention relates to a device for dusting printed products with fine powder according to the preamble of claim 1.

Derartige Geräte werden über dem Förderweg der Druckerzeugnisse an Druckmaschinen installiert und bestäuben die Druckseite des frisch gedruckten Erzeugnisses mit feinem Puder, damit die Druckerzeugnisse nicht über die Farbschichten zusammenkleben, wenn sie übereinandergelegt werden. Die feinen Puderpartikel aus Maisstärke, CaCO₃ oder Zucker haben eine Teilchengröße von in der Regel zwischen 10 und 50 µ und werden in einem Luftstrom vernebelt. Dieser Nebel wird über in der Regel leistenförmige Düsenkörper gegen die Druckerzeugnisse gerichtet, wobei die Achse der Leistenkörper parallel zur Förderrichtung der Druckerzeugnisse verläuft und eine Mehrzahl derartiger Düsenkörper parallel nebeneinander über dem Förderweg der Druckerzeugnisse angeordnet ist.Devices of this type are installed over the conveying path of the printed products on printing presses and dust the printed side of the freshly printed product with fine powder, so that the printed products do not stick together over the color layers when they are placed one on top of the other. The fine powder particles of corn starch, CaCO₃ or sugar have a particle size of usually between 10 and 50 microns and are atomized in an air stream. This mist is directed against the printed products via generally strip-shaped nozzle bodies, the axis of the strip bodies running parallel to the conveying direction of the printed products and a plurality of such nozzle bodies being arranged parallel to one another above the conveying path of the printed products.

Der von der Düsenkörperanordnung insgesamt erzeugte Nebelvorhang muß so breit sein, daß er auch die breitesten Druckerzeugnisse noch vollständig überdeckt. Werden kleinere Druckerzeugnisse gedruckt, so muß man entweder in Kauf nehmen, daß der seitlich außerhalb der Druckerzeugnisse Teil des Pudervorhanges nutzlos erzeugt wird und in unter dem Förderweg der Druckerzeugnisse liegende Maschinenteile eintritt. Dies ist sowohl im Hinblick auf die Verunreinigung der Maschine als auch im Hinblick auf die Kosten des Pudermateriales nachteilig . Baut man andererseits die Düsenkörperanordnung so um, daß die Breite des Pudervorhanges der Breite der Druckerzeugnisse entspricht, so bedeutet dies einen längeren Stop der Druckmaschine, der nur bei sehr hohen Auflagen wirtschaftlich vertretbar ist.The overall fog curtain produced by the nozzle body arrangement must be so wide that it still completely covers the widest printed products. If smaller printed products are printed, one must either accept that the part of the powder curtain that is located outside the printed products is uselessly generated and enters machine parts located below the path of the printed products. This is disadvantageous both in terms of the contamination of the machine and in terms of the cost of the powder material. If, on the other hand, you rebuild the nozzle body arrangement so that the width of the powder curtain corresponds to the width of the printed products, this means a longer stop of the printing press, which is only possible at very high Conditions is economically justifiable.

In der US-A 4 622 896 ist ein Gerät zum Bestäuben von Druckerzeugnissen offenbart, bei welchem eine sich quer zur Förderrichtung der Druckerzeugnisse erstreckende Düsenleiste eine Vielzahl an vorgegebenen Stellen angebrachten Düsen aufweist, die jeweils einzeln durch aufklemmbare ringförmige Kappen verschließbar sind. Auf diese Weise lassen sich Teilbereiche der Druckerzeugnisse, die nicht bedruckt sind, von einer Bestäubung freihalten. Die Versetzung dieser Verschlußkappen erfolgt manuell und unter visueller Kontrolle, was bei einem im Inneren einer größeren Druckmaschine untergebrachten Bestäubungsgerät Schwierigkeiten bereitet.US Pat. No. 4,622,896 discloses a device for dusting printed products, in which a nozzle strip extending transversely to the conveying direction of the printed products has a plurality of nozzles attached at predetermined locations, each of which can be individually closed by snap-on annular caps. In this way, parts of the printed products that are not printed can be kept free from pollination. These caps are moved manually and under visual control, which is difficult for a pollinator housed inside a larger printing press.

Durch die vorliegende Erfindung soll daher ein Gerät zum Bestäuben von Druckerzeugnisses mit feinem Puder gemäß dem Oberbegriff des Anspruches 1 geschaffen werden, bei welchem die Breite des von der Düsenkörperanordnung erzeugten Pudervorhanges kurzfristig und ohne aufwendige Justierarbeiten verändert werden kann.The present invention therefore provides a device for dusting printed matter with fine powder according to the preamble of claim 1, in which the width of the powder curtain produced by the nozzle body arrangement can be changed at short notice and without complex adjustment work.

Diese Aufgabe ist erfindungsgemäß gelöst durch ein Bestäubungsgerät gemäß Anspruch 1.This object is achieved according to the invention by a pollination device according to claim 1.

Bei dem erfindungsgemäßen Bestäubungsgerät ist nur ein einziges Element zu bedienen, um den transversalen Abstand der Düsenkörper zu verändern, nämlich des Betätigungsglied der Abstands-Einstellmittel. Die gemäß der Stellung dieses einzigen Betätigungsgliedes jeweils notwendige Stellung der einzelnen Düsenkörper wird dagegen automatisch und damit rasch eingefahren.In the pollination device according to the invention, only a single element has to be operated in order to change the transverse distance between the nozzle bodies, namely the actuator of the distance adjusting means. The position of the individual nozzle bodies which is necessary in each case according to the position of this single actuating element, on the other hand, is retracted automatically and thus rapidly.

Vorteilhafte Weiterbildungen der Erfindung sind in Unteransprüchen angegeben.Advantageous developments of the invention are specified in the subclaims.

Mit der Weiterbildung der Erfindung gemäß Anspruch 2 wird auf einfache Weise eine streng gleichförmige, synchrone Verstellung der einzelnen Düsenkörper erhalten, da es ausreicht, zwei beliebig ausgesuchten, voneinander entfernten Punkten des Parallelogramm-Scherengestänges eine vorgegebene Relativbewegung aufzuprägen, um die gewünschten synchronen Verstellbewegungen der Düsenkörper zu erhalten.With the development of the invention according to claim 2, a strictly uniform, synchronous adjustment of the individual nozzle bodies is obtained in a simple manner, since it is sufficient to impress a predetermined relative movement on two arbitrarily selected, spaced apart points of the parallelogram scissors linkage in order to achieve the desired synchronous adjustment movements of the nozzle bodies to obtain.

Der gleiche Vorteil ist einem Bestäubungsgerät gemäß Anspruch 3 zu eigen.The same advantage is inherent to a pollination device according to claim 3.

Bei einem Bestäubungsgerät gemäß Anspruch 5 kann man die verschiedenen Düsenkörper nicht nur streng synchron um gleiche Strecken verstellen sondern auch um unterschiedliche Strecken, die in einem fest vorgegebenen Verhältnis zueinander stehen. Trotzdem wird nur eine einzige mechanisch bewegte Antriebsstange benötigt, so daß der mechanische Aufbau des Bestäubungsgerätes einfach ist.In a pollination device according to claim 5, one can not only adjust different nozzle bodies strictly synchronously by the same distances, but also by different distances that are in a predetermined relationship to each other. Nevertheless, only a single mechanically moving drive rod is required, so that the mechanical structure of the pollination device is simple.

Mit der Weiterbildung der Erfindung gemäß Anspruch 6 wird erreicht, daß die Düsenkörper jeweils nach dem Verstellen automatisch sicher in der angefahrenen Lage verriegelt werden.With the development of the invention according to claim 6 it is achieved that the nozzle bodies are automatically locked securely in the approached position after each adjustment.

Bei einem Bestäubungsgerät gemäß Anspruch 7 hat man eine fein dosierbare seifliche Verstellung der Düsenkörper in Verbindung mit einem sehr einfachen mechanischen Aufbau der Schaltkupplungen, welche die Verstellbewegung der einzelnen Düsenkörper steuern.In a pollination device according to claim 7, there is a finely adjustable soap adjustment of the nozzle body in conjunction with a very simple mechanical construction of the switching couplings which control the adjustment movement of the individual nozzle bodies.

Dabei wird mit der Weiterbildung gemäß Anspruch 8 auf sehr einfache Weise ein zwangsweises Festbremsen der Düsenkörper für alle Zeiten gewährleistet, zu denen keine Verstellbewegung befohlen wird.With the development according to claim 8, a forced braking of the nozzle body is ensured in a very simple manner for all times at which no adjustment movement is commanded.

Die Weiterbildung der Erfindung gemäß Anspruch 9 ermöglicht es, die Verstellung der einzelnen Düsenkörper variabler vorzunehmen, da die Synchronisierung durch die Steuerung auf einfache Weise, z.B. durch Umprogrammieren geändert werden kann.The development of the invention according to claim 9 makes it possible to make the adjustment of the individual nozzle bodies more variable, since the synchronization by the control is simple, e.g. can be changed by reprogramming.

Den gleichen Vorteil erhält man auch mit den Weiterbildungen der Erfindung gemäß den Ansprüchen 11 und 12.The same advantage is also obtained with the developments of the invention according to claims 11 and 12.

Eine mechanisch streng gekoppelte Verstellung der einzelnen Düsenkörper erhält man gemäß Anspruch 13 auf mechanisch besonders einfache Weise.A mechanically strictly coupled adjustment of the individual nozzle bodies is obtained in a mechanically particularly simple manner.

Dabei zeichnet sich die Weiterbildung der Erfindung gemäß Anspruch 14 dann durch besonders kompakten und nochmals mechanisch vereinfachten Aufbau aus.The development of the invention according to claim 14 is then characterized by a particularly compact and again mechanically simplified structure.

Mit der Weiterbildung der Erfindung gemäß Anspruch 15 wird erreicht, daß sich die Verstellwege benachbarter Düsenkörper etwas überlappen können, trotzdem aber die Mittel zum kontinuierlichen Einstellen des Abstandes zwischen den Düsenkörpern mechanisch sehr einfachen Aufbau aufweisen.With the development of the invention according to claim 15 it is achieved that the adjustment paths of adjacent nozzle bodies can overlap somewhat, but still have the means for continuously adjusting the distance between the nozzle bodies mechanically very simple structure.

Die Weiterbildung der Erfindung gemäß Anspruch 16 ist im Hinblick auf den Aufbau der Abstands-Einstellmittel unter Verwendung gleicher Gewindespindeln von Vorteil.The development of the invention according to claim 16 is advantageous with regard to the structure of the distance adjusting means using the same threaded spindles.

Die Weiterbildung der Erfindung gemäß Anspruch 17 ist im Hinblick auf ein sicheres und verkantungsfreies Verstellen langer Düsenkörper von Vorteil.The development of the invention according to claim 17 is advantageous with regard to a safe and tilt-free adjustment of long nozzle bodies.

Mit der Weiterbildung der Erfindung gemäß Anspruch 18 wird erreicht, daß lange leistenförmige Düsenkörper auch schräg zur Förderrichtung der Druckerzeugnisse angestellt werden können. Jeder der Düsenkörper überstreicht dann einen transversalen Bereich der Druckerzeugnisse, der dem öffnungswinkel des von ihm erzeugten Teilvorhanges plus der transversalen Versetzung seiner Enden entspricht. Dies ermöglicht es, mit Düsenkörpern zu arbeiten, die einen nicht zu stark aufgeweiteten Nebelkegel erzeugen. Derartige stark aufgeweitete Nebelkegel führen zwangsweise dazu, daß ein größerer Bruchteil des Pudermateriales verlorengeht.With the development of the invention according to claim 18 it is achieved that long strip-shaped nozzle bodies can also be placed at an angle to the conveying direction of the printed products. Each of the nozzle bodies then sweeps over a transverse area of the printed products, which corresponds to the opening angle of the partial curtain produced by it plus the transverse offset of its ends. This makes it possible to work with nozzle bodies that produce a mist cone that is not widened too much. Such widened mist cones inevitably lead to the fact that a larger fraction of the powder material is lost.

Bei einem Bestäubungsgerät gemäß Anspruch 20 erhält man automatisch eine Anpassung der Breite der von den einzelnen Düsenkörper erzeugten Pudernebel an den jeweiligen Abstand der Düsenkörper.In the case of a dusting device according to claim 20, the width of the powder mist generated by the individual nozzle bodies is automatically adjusted to the respective spacing of the nozzle bodies.

Diese zur Abstandseinstellung synchrone Änderung der Strahlbreite erhält man gemäß Anspruch 21 auf einfache mechanische Weise.This change of the beam width synchronous to the distance adjustment is obtained according to claim 21 in a simple mechanical manner.

Mit der Weiterbildung der Erfindung gemäß Anspruch 22 ist dabei gewährleistet, daß Pudernebel nicht nach oben aus dem Bestäubungsgerät austreten kann.With the development of the invention according to claim 22 it is ensured that powder mist can not escape upwards from the pollination device.

Nachstehend wird die Erfindung anhand von Ausführungsbeispielen unter Bezugnahme auf die Zeichnung näher erläutert. In dieser zeigen:

  • Figur 1: eine Aufsicht auf die Stirnseite eines Puderbestäubungsgerätes, in welcher einige Teile weggebrochen sind;
  • Figur 2: eine Aufsicht auf das Puderbestäubungsgerät gemäß Figur 1;
  • Figuren 3 und 4: zu den Figuren 1 und 2 ähnliche Ansichten eines abgewandelten Puderbestäubungsgerätes;
  • Figur 5: eine zu Figur 1 ähnliche Ansicht eines weiter abgewandelten Puderbestäubungsgerätes;
  • Figur 6: einen vertikalen Schnitt durch einen Führungs/ Verstellkopf für eine der Düsenleisten des Puderbestäubungsgerätes nach Figur 5 in vergrößertem Maßstabe;
  • Figur 7: einen Ausschnitt aus einer abgewandelten Düsenleistenanordnung mit gemäß dem Leistenabstand automatisch veränderlicher Breite des von den Leisten abgegebenen Pudernebels;
  • Figuren 8 und 9: zu den Figuren 5 und 6 ähnliche Ansichten eines abgewandelten Puderbestäubungsgerätes;
  • Figur 10: eine Stirnansicht eines weiter abgewandelten Puderbestäubungsgerätes; und
  • Figuren 11 bis 13: Aufsichten auf weitere Ausführungsformen eines Puderbestäubungsgerätes;
The invention is explained in more detail below on the basis of exemplary embodiments with reference to the drawing. In this show:
  • Figure 1 is a plan view of the front of a powder dusting device, in which some parts have broken away;
  • FIG. 2: a top view of the powder dusting device according to FIG. 1;
  • FIGS. 3 and 4: views similar to FIGS. 1 and 2 of a modified powder dusting device;
  • FIG. 5: a view similar to FIG. 1 of a further modified powder dusting device;
  • FIG. 6: a vertical section through a guide / adjustment head for one of the nozzle strips of the powder dusting device according to FIG. 5 on an enlarged scale;
  • FIG. 7: a detail from a modified nozzle strip arrangement with a width of the powder mist emitted by the strips which automatically changes according to the strip spacing;
  • FIGS. 8 and 9: views similar to FIGS. 5 and 6 of a modified powder dusting device;
  • FIG. 10: an end view of a further modified powder dusting device; and
  • FIGS. 11 to 13: top views of further embodiments of a powder dusting device;

Das in den Figuren 1 und 2 gezeigte Puderbestäubungsgerät hat zwei im wesentlichen U-förmige Lagerrahmen 10, 12, die jeweils eine Befestigungsplatte 14 sowie seitliche Lagerschenkel 16, 18 aufweisen.The powder dusting device shown in FIGS. 1 and 2 has two substantially U-shaped bearing frames 10, 12, each of which has a fastening plate 14 and lateral bearing legs 16, 18.

In der Befestigungsplatte 14 sind Bohrungen 20 vorgesehen, in denen Befestigungsschrauben Aufnahme finden können, die zum Anbringen der Lagerrahmen 10, 12 an horizontalen Streben einer Druckmaschine oder zum Anbringen der Lagerrahmen 10, 12 an einer in der Zeichnung nicht näher gezeigten Tragplatte dienen, die dann ihrerseits an einer Druckmaschine befestigt wird.In the mounting plate 14 bores 20 are provided, in which mounting screws can be accommodated, which serve to attach the bearing frames 10, 12 to horizontal struts of a printing press or to attach the bearing frames 10, 12 to a support plate, not shown in the drawing, which then in turn is attached to a printing press.

In den Lagerschenkeln 16, 18 ist im unteren Abschnitt eine Vierkant-Führungsschiene 22 festgelegt. Parallel über der Führungsschiene 22 ist in den Lagerschenkeln 16, 18 unter Verwendung von Axial/Radiallagern 24 eine Gewindespindel 26 gelagert. Diese hat einen Vierkant-Antriebsabschnitt 28, der mechanisch mit einem Elektromotor 30 gekoppelt ist.A square guide rail 22 is fixed in the lower section in the bearing legs 16, 18. A threaded spindle 26 is mounted parallel to the guide rail 22 in the bearing legs 16, 18 using axial / radial bearings 24. This has a square drive section 28 which is mechanically coupled to an electric motor 30.

Die linken Enden der Gewindespindeln 26 tragen Kettenräder 32, über welche eine Kette 34 läuft. Auf diese Weise ist die nicht mit einem Motor verbundene Gewindespindel 26 des hinteren Lagerrahmens 12 mit der getriebenen Gewindespindel 26 des vorderen Lagerrahmens 10 gekoppelt.The left ends of the threaded spindles 26 carry chain wheels 32, over which a chain 34 runs. In this way, the threaded spindle 26 of the rear bearing frame 12, which is not connected to a motor, is coupled to the driven threaded spindle 26 of the front bearing frame 10.

Auf der Führungsschiene 22 sind mehrere Führungsköpfe 36 im Gleitspiel verschiebbar. Die Führungsköpfe 36 haben jeweils auf der Unterseite eine senkrecht zur Zeichenebene von Figur 1 verlaufende T-förmigen Querschnitt aufweisende Haltenut 38, die einen komplementären Querschnitt aufweisenden rotationssymmetrischen Haltezapfen 40 verschiebbar und drehbar aufnimmt, der von der Oberseite einer zugeordneten, insgesamt mit 42 bezeichneten Düsenleiste nach oben steht.On the guide rail 22, several guide heads 36 are slidable. The guide heads 36 each have on the underside a T-shaped cross section running perpendicular to the drawing plane of FIG. 1 and having a complementary cross section with a rotationally symmetrical holding pin 40 which can be displaced and rotated and which moves from the top of an assigned nozzle strip, indicated overall by 42 is at the top.

Die Düsenleisten 42 haben jeweils einen innenliegenden, in Leistenlängsrichtung verlaufenden Verteilerkanal 44, der über eine Vielzahl nach unten weisender Abgabedüsen einen Pudernebel gegen Druckerzeugnisse abgibt, die unter der Düsenleistenanordnung vorbeilaufen.The nozzle strips 42 each have an internal distribution channel 44 which runs in the longitudinal direction of the strip and which, via a plurality of dispensing nozzles pointing downward, emits a powder mist against printed products which pass under the nozzle strip arrangement.

Die Führungsköpfe 36 haben in ihrem oberen Abschnitt eine Gewindebohrung 48, in welche eine Feststellschraube 50 eingedreht werden kann, deren Spitze sich in die Oberseite der Führungsschiene 22 hineinarbeitet. Von den verschiedenen Führungsköpfen 36 wird nur ein einziger mit einer Feststellschraube 50 bestückt; dies ist beim in Figur 1 gezeigten Ausführungsbeispiel der mittlere Führungskopf. Dieser ausgewählte Führungskopf dient als Fixpunkt bei Verstellungen der Düsenleiste 42 in transversaler Richtung.In its upper section, the guide heads 36 have a threaded bore 48 into which a locking screw 50 can be screwed, the tip of which works into the top of the guide rail 22. Of the various guide heads 36, only one is equipped with a locking screw 50; in the embodiment shown in FIG. 1, this is the middle guide head. This selected guide head serves as a fixed point when the nozzle bar 42 is adjusted in the transverse direction.

Damit die Führungsköpfe 36 zwangsläufig nur so verstellt werden können, daß die Abstände benachbarter Düsenleisten 42 alle gleich groß sind, ist ein insgesamt mit 52 bezeichnetes Parallelogramm-Scherengitter vorgesehen, welches über Kreuz gelegte Gitterlenker 54, 56 hat. Die Gitterlenker 54, 56 sind an der überkreuzungsstelle jeweils durch einen Gelenkzapfen 58 gelenkig mit einem der Führungsköpfe 36 verbunden. Die freien Enden der Gitterlenker 54, 56 sind durch Gelenkzapfen 60, 62 verbunden.So that the guide heads 36 can inevitably only be adjusted in such a way that the distances between adjacent nozzle strips 42 are all the same size, a parallelogram scissor grille, designated overall by 52, is provided, which has grating arms 54, 56 laid crosswise. The lattice links 54, 56 are each articulated to one of the guide heads 36 at the crossover point by means of a pivot pin 58. The free ends of the lattice links 54, 56 are connected by pivot pins 60, 62.

Einer der Führungsköpfe 36, der sich von dem durch die Feststellschraube 50 festgebremsten Führungskopf 36 unterscheidet, beim in Figur 1 gezeigten Ausführungsbeispiel der am weitesten links gelegene der Führungsköpfe 36, trägt einen Antriebskopf 64, der mit einer Gewindebohrung 66 versehen ist, die auf der Gewindespindel 26 läuft. Durch Drehen der Gewindespindel 26 im einen oder im anderen Drehsinne kann man somit den Abstand der Düsenleisten 42 vergröBern oder verkleinern, wobei die Verstellbewegung symmetrisch zu dem festgebremsten mittleren Führungskopf und damit auch der mittleren Düsenleiste erfolgt. Würde man statt dem mittleren Führungskopf den in Figur 1 am weitesten rechts gelegenen Führungskopf festbremsen, so erhielte man bei im übrigen unveränderter Ausbildung des in den Figuren 1 und 2 gezeigten Puderbestäubungsgerätes eine gleichmäßige Vergrößerung bzw. Verkleinerung der Düsenleistenabstände aufbauend auf einem Fixpunkt, der beim in Figur 1 rechts gelegenen Ende der Führungsschiene 22 liegt.One of the guide heads 36, which differs from the guide head 36 braked by the locking screw 50, in the exemplary embodiment shown in FIG. 1 the leftmost of the guide heads 36, carries a drive head 64 which is provided with a threaded bore 66 which is on the threaded spindle 26 is running. By rotating the threaded spindle 26 in one or the other direction of rotation, the distance between the nozzle strips 42 can thus be increased or decreased, the adjustment movement taking place symmetrically to the braked central guide head and thus also the central nozzle strip. If, instead of the middle guide head, the rightmost guide head in Fig. 1 were braked, one would get a constant increase or decrease in the spacing between the nozzle strips, based on a fixed point, which is the same as in Fig. 1 and 2, if the powder dusting device shown in Figs Figure 1 is the right end of the guide rail 22.

Die Verteilerkanäle 44 der verschiedenen Düsenleisten 42 sind über flexible Schläuche 68 mit einem nicht näher gezeigten Nebelerzeuger verbunden. Den Pudernebel erhält man durch Zerstäuben feiner Partikel von 10 bis 50 µ, vorzugsweise 15 bis 20 µ aus Maisstärke, CaCO₃ oder Zucker in einem Druckluftstrom.The distributor channels 44 of the various nozzle strips 42 are connected to a mist generator (not shown in more detail) via flexible hoses 68. The powder mist is obtained by atomizing fine particles of 10 to 50 microns, preferably 15 to 20 microns from corn starch, CaCO₃ or sugar in a stream of compressed air.

Man erkennt, daß das in den Figuren 1 und 2 gezeigte Puderbestäubungsgerät einfach durch Erregen des Elektromotors 30 im einen oder anderen Drehsinne für das Bestäuben von Druckerzeugnissen unterschiedlicher Breite eingestellt werden kann. Dabei können die Druckerzeugnisse unterschiedlicher Breite entweder auf der Mitte der Druckmaschine (mittlerer Führungkopf festgebremst) oder so zugeführt werden, daß ihre einen Seitenkanten gleichermaßen bei der einen Seite der Druckmaschine laufen (randständiger Führungskopf festgebremst).It can be seen that the powder dusting device shown in FIGS. 1 and 2 can be adjusted simply by exciting the electric motor 30 in one or the other sense of rotation for the dusting of printed products of different widths. The printed products of different widths can either be fed to the center of the printing machine (central guide head braked) or fed in that their one side edges run equally on one side of the printing press (edge guide head braked).

Bei dem abgewandelten Ausführungsbeispiel nach den Figuren 3 und 4, sind Teile, die obenstehend schon beschrieben wurden, wieder mit dem gleichen Bezugszeichen versehen.In the modified exemplary embodiment according to FIGS. 3 and 4, parts which have already been described above are again provided with the same reference symbols.

Die Gewindespindel 26 hat nun aber zwei mit gegenläufigem Gewinde versehene Spindelabschnitte 26a und 26b, welche mit zwei Antriebsköpfen 64 zusammenarbeiten, die auf die beiden randständigen Führungsköpfe 36 aufgesetzt sind. Diese randständigen Führungsköpfe werden somit zwangsläufig symmetrisch zur Mittelebene des Puderbestäubungsgerätes bewegt.However, the threaded spindle 26 now has two spindle sections 26a and 26b provided with opposite threads, which work together with two drive heads 64 which are placed on the two peripheral guide heads 36. These peripheral guide heads are thus inevitably moved symmetrically to the center plane of the powdering device.

Zur Gewährleistung gleicher Abstände zwischen den einzelnen Düsenleisten sind nunmehr Schraubenfedern 70 vorgesehen, die jeweils zwischen benachbarte der unter leichtem Gleitspiel auf der Führungsschiene 22 angeordneten Führungsköpfe 36 eingefügt sind.In order to ensure the same distances between the individual nozzle strips, helical springs 70 are now provided, each of which is inserted between adjacent guide heads 36 arranged on the guide rail 22 with slight sliding play.

Bei dem Ausführungsbeispiel nach den Figuren 3 und 4 ist auch die beim Ausführungsbeispiel nach Figur 1 und 2 vorgesehene Kopplungs-Kette 34 weggelassen. Die Antriebsabschnitte 28 beider Gewindespindeln 26 sind jeweils mit einem zugeordneten Elektromotor 30 bzw. 30′ verbunden, so daß der Abstand der Führungsköpfe und Düsenleisten für den vorderen und hinteren Lagerrahmen unterschiedlich eingestellt werden kann. Man kann so auch eine Schrägstellung der Düsenleisten 42 zur Förderrichtung der Druckerzeugnisse (in Figur 4 von oben nach unten) erzielen, wie sie in Figur 4 wiedergegeben ist. Damit kann jede der Düsenleisten 42 einen transversalen Bereich der Druckerzeugnisse überstreichen, der größer ist, als dies dem Kegelöffnungswinkel des von der einzelnen Düsenleiste 42 erzeugten Nebels entspricht. Man kann also mit verhältnismäßig scharfen Nebelstrahlen arbeiten und trotzdem mit einer kleinen Anzahl von Düsenleisten 42 die gesamte Breite der Druckmaschine abdecken. Die beim Verschwenken der Düsenleisten 42 aufzunehmenden kleinen Relativbewegungen in Leistenlängsrichtung sind deshalb möglich, weil die Haltezapfen 40 längsverschiebbar in den Haltenuten 38 der Führungsköpfe 36 einsitzen.In the exemplary embodiment according to FIGS. 3 and 4, the coupling chain 34 provided in the exemplary embodiment according to FIGS. 1 and 2 is also omitted. The drive sections 28 of both threaded spindles 26 are each connected to an associated electric motor 30 or 30 ', so that the distance between the guide heads and nozzle strips for the front and rear bearing frames can be set differently. It is also possible to achieve an inclined position of the nozzle strips 42 with respect to the conveying direction of the printed products (from top to bottom in FIG. 4), as shown in FIG. 4. Each of the nozzle strips 42 can thus sweep over a transverse area of the printed products which is larger than the cone opening angle of the corresponds to fog generated by the individual nozzle strip 42. So you can work with relatively sharp fog rays and still cover the entire width of the printing press with a small number of nozzle strips 42. The small relative movements to be recorded in the longitudinal direction of the bar when the nozzle bars 42 are pivoted are possible because the retaining pins 40 are longitudinally displaceably seated in the retaining grooves 38 of the guide heads 36.

Beim Ausführungsbeispiel nach den Figuren 5 und 6 ist jedem der Führungsköpfe 36 ein eigener Antriebskopf 64 zugeordnet, der auf der Gewindespindel 26 läuft. Die Antriebsköpfe 64 enthalten speziell ausgebildete Schaltkupplungen, über die sie wahlweise mit der Gewindespindel 26 antriebsschlüssig verbindbar sind bzw. von dieser trennbar sind. Die Steuerung dieser unter Bezugnahme auf Figur 6 noch näher zu beschreibenden Schaltkupplungen erfolgt über Steuerleitungen 72 unter Verwendung eines Rechners 74, der mit einem Tastenfeld 76, einem Monitor 70 sowie einer den Förderweg der Druckerzeugnisse in transversaler Richtung überdeckenden Mehrfachlichtschranke 80 zusammenarbeitet. Damit kann die Breite des insgesamt von der Düsenleistenanordnung erzeugten Pudernebels entweder automatisch gemäß der von der Mehrfachlichtschranke 80 gemessenen Breite der Druckerzeugnisse eingestellt werden oder gemäß am Tastenfeld 76 eingestellter Werte gewählt werden.In the exemplary embodiment according to FIGS. 5 and 6, each of the guide heads 36 is assigned its own drive head 64 which runs on the threaded spindle 26. The drive heads 64 contain specially designed clutches, by means of which they can optionally be connected to the threaded spindle 26 in a drive-locking manner or can be separated therefrom. These switching clutches, which will be described in more detail with reference to FIG. 6, are controlled via control lines 72 using a computer 74, which works together with a keypad 76, a monitor 70 and a multiple light barrier 80 covering the conveying path of the printed products in the transverse direction. The width of the powder mist generated overall by the nozzle bar arrangement can thus either be set automatically in accordance with the width of the printed products measured by the multiple light barrier 80 or selected in accordance with values set on the keypad 76.

Wie aus Figur 6 ersichtlich, ist in den Antriebsköpfen 64 jeweils ein zweiarmiger Hebel 82 um einen horizontalen Stift 83 drehbar gelagert. Dessen einer Hebelarm 84 trägt am einen Ende ein Muttersegment 86, welches auf der Gewindespindel 26 laufen kann. Ein zweiter Hebelarm 88 des Hebels 82 trägt einen Bremskörper 90, der mit der einen Seitenfläche der Führungsschiene 22 zusammenarbeitet. Am Hebelarm 84 ist ferner eine Ankerplatte 92 angebracht, die mit einem Elektromagneten 94 zusammenarbeitet, der am mit 96 bezeichneten Gehäuse des Antriebskopfes 64 befestigt ist.As can be seen from FIG. 6, a two-armed lever 82 is rotatably mounted in the drive heads 64 about a horizontal pin 83. The lever arm 84 carries at one end a nut segment 86 which can run on the threaded spindle 26. A second lever arm 88 of the lever 82 carries a brake body 90 which cooperates with one side surface of the guide rail 22. An armature plate 92 is also attached to the lever arm 84 and is connected to an electromagnet 94 cooperates, which is attached to the housing of the drive head 64, designated 96.

Zwischen die Ankerplatte 92 und die Stirnfläche des Elektromagneten 94 ist eine Schraubendruckfeder 98 eingespannt, durch welche der Hebel 82 in die in Figur 6 gezeigte Stellung vorgespannt ist, in welcher der Bremskörper 90 an der Führungsschiene 22 anliegt und das Muttersegment 86 außer Eingriff mit der Gewindespindel 26 ist. Bei erregtem Elektromagneten 94 wird dagegen der Bremskörper 90 von der Führungsschiene 22 abgehoben, das Muttersegment 86 auf die Gewindespindel 26 aufgesetzt. Nun wird der betrachtete Antriebskopf 64 und der mit ihm verbundene Führungskopf 36 sowie die von diesem getragene Düsenleiste 42 gemäß der Drehung der Gewindespindel 26 verstellt.A helical compression spring 98 is clamped between the armature plate 92 and the end face of the electromagnet 94, by means of which the lever 82 is pretensioned into the position shown in FIG. 6, in which the brake body 90 rests on the guide rail 22 and the nut segment 86 is disengaged from the threaded spindle 26 is. When the electromagnet 94 is energized, on the other hand, the brake body 90 is lifted off the guide rail 22 and the nut segment 86 is placed on the threaded spindle 26. Now the drive head 64 under consideration and the guide head 36 connected to it and the nozzle bar 42 carried by it are adjusted according to the rotation of the threaded spindle 26.

Der Rechner 74 arbeitet grob gesprochen so, daß er den Elektromotor 30 solange erregt, wie eine Verstellbewegung von Antriebsköpfen 64 überhaupt benötigt wird. Dia Elektromagneten 94 der verschiedenen Antriebsköpfe 64 werden aber nur über einen Teil dieser Zeitspanne erregt, wie dies eben zum unterschiedlich weiten Verstellen der Antriebsköpfe 64 notwendig ist.Roughly speaking, the computer 74 works in such a way that it excites the electric motor 30 for as long as an adjustment movement of drive heads 64 is required at all. The electromagnets 94 of the various drive heads 64 are, however, only excited over part of this period of time, as is necessary to adjust the drive heads 64 to different degrees.

Man erkennt, daß man durch entsprechendes Programmieren des Rechners 74 eine zwangsweise gleichförmige zur Mittelebene des Puderbestäubungsgerätes erfolgende Verstellung der Düsenleisten 42 genauso bewerkstelligen kann wie eine in vorgegebener Weise asymmetrische oder ungleichförmige Verstellung der verschiedenen Düsenleisten.It can be seen that by appropriately programming the computer 74, a forced adjustment of the nozzle strips 42 which is inevitably uniform with respect to the center plane of the powder dusting device can be accomplished in the same way as an asymmetrical or non-uniform adjustment of the various nozzle strips in a predetermined manner.

Für manche Anwendungsfälle ist es vorteilhaft, wenn man zugleich mit dem Verstellen des Abstandes zwischen benachbarten Düsenleisten 42 auch die Abgabecharakteristik der Düsenleisten synchron ändert, also den Öffnungswinkel des Nebelkegels mit zunehmendem Abstand der Düsenleisten vergrößert, mit abnehmendem Düsenleistenabstand verkleinert.For some applications, it is advantageous if, simultaneously with the adjustment of the distance between adjacent nozzle strips 42, the delivery characteristic of the nozzle strips is also changed synchronously, that is to say the opening angle of the Mist cone enlarged with increasing distance between the nozzle bars, reduced with decreasing nozzle bar distance.

Figur 7 zeigt eine mechanische Lösung für diese zwangweise Änderung der Strahlcharakteristik synchron zum Abstand der Düsenleisten.FIG. 7 shows a mechanical solution for this compulsory change in the jet characteristic in synchronism with the distance between the nozzle strips.

Die Düsenleisten haben jeweils über Gelenke 100 angelenkte seitliche Kanalwände 102, 104, die eine variable Düsenöffnung 106 begrenzen. Die unteren Enden der Kanalwände 102, 104 benachbarter Düsenleisten 42 sind jeweils durch horizontale Kopplungsplatten 108 verbunden, und zwar über Gelenke 110.The nozzle strips each have side channel walls 102, 104 articulated via joints 100, which delimit a variable nozzle opening 106. The lower ends of the channel walls 102, 104 of adjacent nozzle strips 42 are each connected by horizontal coupling plates 108, specifically via joints 110.

Aus Figur 7 ist direkt ersichtlich, daß die Breite der Düsenöffnung 106 automatisch vergrößert wird, wenn die Antriebsköpfe 64 auseinander gefahren werden, automatisch verkleinert werden, wenn die Antriebsköpfe 64 näher zusammengestellt werden. Darüber hinaus bilden die Kopplungsplatten 108 zusammen mit den Kanalwänden 102, 104 eine variable Abdeckung des pudererfüllten Raumes nach oben.It can be seen directly from FIG. 7 that the width of the nozzle opening 106 is automatically increased when the drive heads 64 are moved apart, and is automatically reduced when the drive heads 64 are brought closer together. In addition, the coupling plates 108 together with the channel walls 102, 104 form a variable cover of the powder-filled space upwards.

Beim Ausführungsbeispiel nach den Figuren 8 und 9 sind Bauteile, die obenstehend unter Bezugnahme auf die Figuren 5 und 6 schon erläutert würden, wieder mit denselben Bezugszeichen versehen und werden nicht noch einmal im einzelnen beschrieben.In the exemplary embodiment according to FIGS. 8 and 9, components which would have already been explained above with reference to FIGS. 5 and 6 are again provided with the same reference symbols and will not be described again in detail.

Die Gewindespindel 26 ist nun unverdrehbar von den Lagerschenkeln 16, 18 gehalten, und die Antriebsköpfe 64 enthalten jeweils einen unabhängig steuerbaren Antriebsmotor 112, der vom Rechner 74 her in der einen oder anderen Drehrichtung angesteuert wird. Der Antriebsmotor 112 ist jeweils am Gehäuse 96 festgemacht und seine Welle trägt ein schräg verzahntes Zahnrad 114, welches mit einem entsprechend schräg verzahnten Zahnkranz 116 kämmt, der auf die Außenseite einer Gewindehülse 118 aufgebracht ist. Die Gewindehülse 118 hat einen axial vom Zahnkranz 116 entfernten Lagerbund 120, der über ein Axial/Radiallager 122 in einer Seitenwand des Gehäuses 96 gelagert ist.The threaded spindle 26 is now held non-rotatably by the bearing legs 16, 18, and the drive heads 64 each contain an independently controllable drive motor 112 which is controlled by the computer 74 in one or the other direction of rotation. The drive motor 112 is fixed to the housing 96 and its shaft carries a helical gear 114, which with a corresponding combs helical toothed ring 116 which is applied to the outside of a threaded sleeve 118. The threaded sleeve 118 has a bearing collar 120 which is axially distant from the ring gear 116 and which is mounted in a side wall of the housing 96 via an axial / radial bearing 122.

Die Gewindehülse 118 läuft auf der Gewindespindel 26, und durch Erregen des Antriebsmotors 112 in der einen oder anderen Drehrichtung läßt sich somit der betrachtete Antriebskopf 64 auf der Gewindespindel 26 nach links oder rechts verschieben. Die Abstimmung der Bewegung der verschiedenen Antriebsköpfe 64 besorgt der Rechner 74.The threaded sleeve 118 runs on the threaded spindle 26, and by driving the drive motor 112 in one or the other direction of rotation, the drive head 64 under consideration can thus be moved to the left or right on the threaded spindle 26. The computer 74 takes care of the coordination of the movement of the different drive heads 64.

Für die zweiten Enden der Düsenkörper 42 ist die gleiche Verstelleinrichtung vorgesehen, wie sie in den Figuren 8 und 9 gezeigt ist. Die Ansteuerung der Antriebsköpfe 64 besorgt ebenfalls der Rechner 74, wobei normalerweise die in Förderrichtung der Druckbogen hintereinander liegenden Antriebsköpfe 64 mit denselben Steuersignalen beaufschlagt werden.The same adjustment device is provided for the second ends of the nozzle bodies 42 as is shown in FIGS. 8 and 9. The control of the drive heads 64 is likewise carried out by the computer 74, the drive control 64 lying one behind the other in the conveying direction of the printed sheets being normally acted upon by the same control signals.

Auch beim Ausführungsbeispiel nach Figur 10 sind oben schon erläuterte Bauteile wieder mit denselben Bezugszeichen versehen. In den Lagerschenkeln 16, 18 sind nun drehbar zwei Gewindespindeln 26′ und 26˝ angeordnet. Auf diesen Gewindespindeln befinden sich vier Gewinde 124a, 124b, 124c und 124d unterschiedlicher Steigung: das Gewinde 124b hat die doppelte Steigung wie das Gewinde 124a; das Gewinde 124c hat die dreifache Steigung des Gewindes 124a und das Gewinde 124d hat die vierfache Steigung des Gewindes 124a. Wie aus Figur 10 ersichtlich, überlappen sich die Gewinde 124 auf eine kurze Wegstrecke, und aus diesem Grunde sind sie auf die beiden Gewindespindeln 26′ und 26˝ verteilt. Nimmt man eine Lücke im Einstellbereich des Abstandes der Düsenkörper 42 in Kauf, so kann man die Gewinde 124 auch sämtlich auf einer einzigen Gewindespindel anbringen.In the exemplary embodiment according to FIG. 10, components already explained above are again provided with the same reference symbols. In the bearing legs 16, 18 two threaded spindles 26 'and 26' are now rotatably arranged. There are four threads 124a, 124b, 124c and 124d of different pitch on these threaded spindles: the thread 124b has twice the pitch as the thread 124a; thread 124c has three times the pitch of thread 124a and thread 124d has four times the pitch of thread 124a. As can be seen from Figure 10, the threads 124 overlap for a short distance, and for this reason they are distributed over the two threaded spindles 26 'and 26'. If one accepts a gap in the setting range of the distance between the nozzle bodies 42, one can the threads 124 are also all attached to a single threaded spindle.

Die Gewindespindeln 26′ und 26˝ sind durch einen Kettentrieb 126 zwangsläufig gekoppelt, laufen also mit gleicher Drehzahl.The threaded spindles 26 'and 26˝ are inevitably coupled by a chain drive 126, so run at the same speed.

Bei denjenigen der Düsenkörpern 42, die von der Gewindespindel 26′ her angetrieben werden, ist zwischen den Antriebskopf 64 und den Führungskopf 36 ein Zwischenstück 128 eingefügt, welches die Gewindespindel 26˝ unter Spiel übergreift.In those of the nozzle bodies 42 which are driven by the threaded spindle 26 ', an intermediate piece 128 is inserted between the drive head 64 and the guide head 36, which overlaps the threaded spindle 26' with play.

Durch Drehen der Gewindespindel 26′ werden somit die Düsenleisten 42 beim Ausführungsbeispiel nach Figur 10 genauso zwangsläufig in gleicher Weise verfahren wie unter Verwendung des in Figur 1 gezeigten Scherengitters 52.By rotating the threaded spindle 26 ', the nozzle strips 42 in the exemplary embodiment according to FIG. 10 are inevitably moved in exactly the same way as when using the scissor grid 52 shown in FIG. 1.

Bei der in Figur 11 gezeigten weiteren Variante arbeiten die Antriebsköpfe 64 für die verschiedenen Düsenleisten mit vier verschiedenen Gewindespindeln 26¹, 26², 26³ und 26⁴ zusammen. Dabei läuft die Gewindespindel 26² zweimal so schnell wie die Gewindespindel 26¹, die Gewindespindeln 26³ und 26⁴ drei- bzw. viermal so schnell.In the further variant shown in FIG. 11, the drive heads 64 for the different nozzle strips work together with four different threaded spindles 26¹, 26², 26³ and 26⁴. The threaded spindle 26² runs twice as fast as the threaded spindle 26¹, the threaded spindles 26³ and 26⁴ three or four times as fast.

Auf die Gewindespindeln arbeiten vier Schrittmotoren 130¹, 130², 130³ und 130⁴. Der Schrittmotor 130⁴ erhält seine Steuerimpulse über einen Frequenzteiler 132⁴ mit Teilverhältnis "3" vom Ausgang eines Impulsgebers 134. Der Frequenzteiler 132⁴ läßt also jeden dritten der vom Impulsgeber 134 bereitgestellten Impulse hindurchlaufen. Entsprechend werden die Schrittmotoren 130³, 130² und 130¹ über Frequenzteiler 132³, 132² und 132¹ mit den Steuerimpulsen des Impulsgebers 134 beaufschlagt, deren Teilverhältnis "4", "6" und "12" beträgt.Four stepper motors 130¹, 130², 130³ and 130⁴ work on the threaded spindles. The stepper motor 130⁴ receives its control pulses via a frequency divider 132⁴ with a partial ratio "3" from the output of a pulse generator 134. The frequency divider 132⁴ thus allows every third of the pulses provided by the pulse generator 134 to pass through. Correspondingly, the stepper motors 130³, 130² and 130¹ are applied via frequency dividers 132³, 132² and 132¹ with the control pulses of the pulse generator 134, the partial ratio of which is "4", "6" and "12".

Der Impulsgeber 134 selbst ist ein steuerbarer Impulsgeber und erhält über eine Leitung 136 vom Rechner 74 ein Signal, das die Anzahl der vom Impulsgeber 134 jeweils abzugebenden Impulse vorgibt. Dies kann z.B. durch übergabe einer binär verschlüsselten Zahl erfolgen, die einen im Impulsgeber 134 enthaltenen Zähler vorsetzt, wobei der Impulsgeber jeweils nach Erhalt einer solchen Zahl beginnt Impulse zu erzeugen, die gleichzeitig auf eine Rückwärts-Zählklemme dieses internen Zählers gegeben werden und die Impulsabgabe beendet, wenn der Zähler auf Null zurückgestellt ist.The pulse generator 134 itself is a controllable pulse generator and receives a signal via a line 136 from the computer 74, which specifies the number of pulses to be emitted by the pulse generator 134. This can e.g. by passing a binary-coded number, which presets a counter contained in the pulse generator 134, the pulse generator each time after receiving such a number begins to generate pulses which are simultaneously given to a down-counter terminal of this internal counter and stop the pulse output when the Counter is reset to zero.

Bei einer in Figur 11 gestrichelt eingezeichneten Variante kann man wieder einen einzigen Elektromotor 30 verwenden, um eine Gewindespindel 26 anzutreiben. Die Gewindespindel 26 arbeitet dann direkt auf die Gewindespindel 26¹, während die Gewindespindeln 26² bis 26⁴ über Getriebe 138² bis 138⁴ an die Gewindespindel 26 angekoppelt sind. Die Getriebe 138², 138³ und 138⁴ besorgen eine Drehzahlübersetzung um den Faktor "2", "3" und "4". Die Getriebe 138 können Zahnradgetriebe, Riemengetriebe oder Kettengetriebe sein.In a variant shown in broken lines in FIG. 11, a single electric motor 30 can again be used to drive a threaded spindle 26. The threaded spindle 26 then works directly on the threaded spindle 26¹, while the threaded spindles 26² to 26⁴ are coupled to the threaded spindle 26 via gears 138² to 138⁴. The gearboxes 138², 138³ and 138⁴ provide a speed ratio by a factor of "2", "3" and "4". The gears 138 can be toothed gears, belt gears or chain gears.

Das Ausführungsbeispiel nach Figur 12 ist dem nach Figur 11 sehr ähnlich, nur arbeiten die Schrittmotoren 130i auf im Lagerschenkel 18 laufende getriebene Umlenkräder 140i, die zusammen mit im Lagerschenkel 16 freilaufend angeordneten Umlenkrädern 142i und über diese Räder laufenden Riemen 144i einen auf einen zugeordneten Antriebskopf 64i arbeitenden Riementrieb bilden.The embodiment according to FIG. 12 is very similar to that according to FIG. 11, only the stepper motors 130 i work on driven deflection wheels 140 i running in the bearing leg 18, the one together with deflection wheels 142 i arranged freely running in the bearing leg 16 and belts 144 i running over these wheels form an associated drive head 64 i working belt drive.

Beim Ausführungsbeispiel nach Figur 13 sind den Antriebsköpfen 64i hydraulische Stellzylinder 146i zugeordnet, die über Mengenteiler 148i und ein Steuerventil 150 mit Druckmittel versorgt werden. Die Mengenteiler 148i stellen sicher, daß sich die Kolbenstangen der Stellzylinder 148¹ bis 148⁴ wieder im Verhältnis 1:2:3:4 bewegen. Um einheitlich die gleichen Stellzylinder verwenden zu können, sind diese unter Verwendung von Klemmstücken 152 in der Nachbarschaft des zugeordneten Antriebskopfes 64 auf der zugeordneten Führungsschiene 22 festgemacht, wobei die zu den beiden Seiten der Gerätemitteleben liegenden Stellzylinder entgegengesetzt ausgerichtet sind, was durch entsprechendes Vertauschen ihrer Arbeitsleitungen 154 und 156 kompensiert wird.In the exemplary embodiment according to FIG. 13, the drive heads 64 i are assigned hydraulic actuating cylinders 146 i , which are supplied with pressure medium via flow dividers 148 i and a control valve 150. The flow dividers 148 i ensure that the piston rods of the actuating cylinders 148¹ to 148⁴ move again in the ratio 1: 2: 3: 4. In order to be able to use the same actuating cylinders uniformly, these are fixed using clamping pieces 152 in the vicinity of the associated drive head 64 on the associated guide rail 22, the actuating cylinders lying on both sides of the device centering in opposite directions, which is due to the corresponding interchanging of their working lines 154 and 156 is compensated.

Es versteht sich, daß man bei den oben beschriebenen Ausführungbeispielen die Gesamtzahl der Düsenleisten 42 erhöhen oder auch erniedrigen kann, wobei dann die Unter° schiede der Verstellbewegungen entsprechend der geänderten Leistenanzahl gewählt werden.It goes without saying that the total number of nozzle strips 42 can be increased or decreased in the exemplary embodiments described above, in which case the different degrees of the adjustment movements are selected in accordance with the changed number of strips.

Claims (22)

  1. Apparatus for dusting printed products with fine powder, with a plurality of preferably bar-shaped nozzle bodies supported by a frame part and arranged at a distance apart, characterised by means (26, 52; 26, 72; 26, 82 to 94) for continuously adjusting tire spacing between the nozzle bodies (42), which comprise an individual actuating member (26;74) serving for adjusting the spacing between the nozzle bodies (42).
  2. Apparatus according to Claim 1, characterised in that the spacing adjusting means comprise a lazy tongs arrangement (52), whereof the individual links (54, 56) are connected to each other and pivotally (58 to 62) to the nozzle bodies (42).
  3. Apparatus according to Claim 1, characterised in that the spacing adjustment means (2) comprise adjusting members (36, 64) able to move with respect to each other and acting on the two nozzle bodies (42) located furthest towards the outside and springs (70) located between adjacent nozzle bodies (42), the nozzle bodies (42) arranged between the adjusting members (36, 64) being able to slide freely on a guide (22).
  4. Apparatus according to Claim 3, characterised in that the adjusting members (36, 64) are connected to external nozzle bodies (42) of the nozzle body arrangement.
  5. Apparatus according to Claim 1, characterised in that the spacing adjustment means comprise a drive rod (26), which can be connected by way of individually controllable switching couplings (82 to 94) to the nozzle bodies (42) which are arranged to slide; and that the switching couplings (82 to 94) can be actuated by way of a control circuit (74) cooperating with a selection member (76;80).
  6. Apparatus according to Claim 5, characterised in that the spacing adjustment means comprise brakes (90) actuated in phase opposition with the controllable switching couplings (92 to 94), which brakes cooperate with a brake bar, which preferably simultaneously represents a guide bar (22) for the nozzle bodies (42).
  7. Apparatus according to Claim 5 or 6, characterised in that the spacing adjustment means comprise a thread-drive (26, 66; 26, 86) driven by a servo motor (30) and the switching couplings have nut segments (86), which are supported by a lever (82) mounted to rotate on the housing (96) of the nozzle bodies (42).
  8. Apparatus according to Claim 7, characterised in that a further arm (88) of the lever (82) supports a brake member (90) cooperating with the brake bar (22).
  9. Apparatus according to Claim 1, characterised in that the spacing adjustment means comprise an elongated travelling member (26) and drive heads (64) travelling thereon and synchronised by a control (74), for each of the nozzle bodies (42).
  10. Apparatus according to Claim 9, characterised in that the travelling member (26) is a threaded spindle or toothed rack and the drive head (64) comprises threaded sleeves (118) cooperating with the threaded spindle or pinions cooperating with the toothed rack.
  11. Apparatus according to Claim 1, characterised in that the spacing adjustment means comprise operating cylinders (146) operated by pressure medium, which are each associated with one of the nozzle bodies (42) and are synchronised by a control arrangement (74).
  12. Apparatus according to Claim 1, characterised in that the spacing adjustment means comprise belt or chain drives (130, 140-144), which are each associated with one of the nozzle bodies (42) and are synchronised by a control arrangement (74).
  13. Apparatus according to Claim 1, characterised in that the spacing adjustment means comprise separate threaded sections (124a to 124d) as well as drive heads (64) travelling thereon, which are each associated with one of the nozzle bodies (42).
  14. Apparatus according to Claim 13, characterised in that at least partial groups of the thread sections (124a to 124d) have a different pitch and are supported by a common spindle (26′ or 26˝).
  15. Apparatus according to Claim 14, characterised in that adjacent thread sections (124a to 124d) of different pitch are arranged on different threaded spindles (26′, 26˝).
  16. Apparatus according to one of Claims 13 to 15, characterised in that at least one partial group of the thread sections have the same pitch and are driven by drive shafts travelling at different speeds (132¹ to 132⁴ ; 138¹ to 138⁴) a control arrangement (74) determining the speed ratio of these drive shafts.
  17. Apparatus according to one of Claims 1 to 16, the nozzle bodies being in the shape of bars, characterised in that a set of spacing adjustment means (26, 52; 26, 64, 72; 26, 64) is associated with the end sections of the nozzle bodies (42).
  18. Apparatus according to Claim 17, characterised in that the two sets of spacing adjustment means can be actuated independently of each other and the end sections of the nozzle bodies (42) are connected pivotally (38, 40) to the spacing adjustment means, at least the one end sections of the nozzle bodies (42) additionally being connected in a slideable manner to the associated spacing adjustment means.
  19. Apparatus according to Claim 17, characterised in that the spacing adjustment means are connected (32, 34) in a compulsory manner for a common, identical adjustment of the nozzle bodies (42).
  20. Apparatus according to one of Claims 1 to 19, characterised by means (108) for adjusting the jet characteristics of the nozzle bodies (42) in synchronism with the adjustment of the spacing between the nozzle bodies (42).
  21. Apparatus according to Claim 20, characterised in that the nozzle bodies (42) comprise tilting flaps (102, 104) defining the jet characteristics and the tilting flaps of adjacent nozzle bodies are pivotally connected by coupling members (108).
  22. Apparatus according to Claim 21, characterised in that the coupling members (108) are constructed as plates closing the gaps between the tilting flaps (102, 104).
EP89911806A 1988-11-11 1989-10-17 Powdering device for printed articles Expired - Lifetime EP0442903B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89911806T ATE85003T1 (en) 1988-11-11 1989-10-17 DEVICE FOR DUSTING PRINTED PRODUCTS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8814129U DE8814129U1 (en) 1988-11-11 1988-11-11 Device for dusting printed products
DE8814129U 1988-11-11

Publications (2)

Publication Number Publication Date
EP0442903A1 EP0442903A1 (en) 1991-08-28
EP0442903B1 true EP0442903B1 (en) 1993-01-27

Family

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Application Number Title Priority Date Filing Date
EP89911806A Expired - Lifetime EP0442903B1 (en) 1988-11-11 1989-10-17 Powdering device for printed articles

Country Status (5)

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US (1) US5163370A (en)
EP (1) EP0442903B1 (en)
JP (1) JP2892729B2 (en)
DE (2) DE8814129U1 (en)
WO (1) WO1990005064A1 (en)

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US5094398A (en) * 1990-09-13 1992-03-10 Nordson Corporation Quick-adjusting, multiple dispenser positioner
DE4237111B4 (en) * 1992-11-04 2006-03-09 Platsch, Hans G., Dipl.-Ing. dusting device
DE19501346A1 (en) * 1995-01-18 1996-07-25 Hans Georg Platsch Device for measuring the surface of a printed product
DE19600075A1 (en) * 1996-01-03 1997-07-10 Hans Georg Platsch Device for powdering printed matter
DE19836018A1 (en) 1998-08-10 2000-02-17 Weitmann & Konrad Fa Arrangement for applying powder to printed sheets
DE20020564U1 (en) * 2000-12-05 2001-05-03 Nordson Corp Westlake Device for dispensing fluids, in particular flowable adhesive
DE102007046651A1 (en) * 2007-09-28 2009-04-02 Heidelberger Druckmaschinen Ag powder device
JP5863408B2 (en) 2011-11-14 2016-02-16 東芝機械株式会社 Painting robot system and spray gun unit
DE102013205471A1 (en) * 2013-03-27 2014-10-02 Weitmann & Konrad Gmbh & Co Kg Device for the distributed application of powder to moving printed products
DE102015014715A1 (en) * 2015-11-17 2017-05-18 Eltosch Grafix GmbH Apparatus and method for powdering printed sheets
MX2019014165A (en) * 2018-11-28 2020-08-03 Prec Valve And Automation Inc Multiple fourth axis robot.
CN115364607A (en) * 2022-09-14 2022-11-22 河南北筑沥青发泡科技有限公司 Spraying dust removal system

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Publication number Priority date Publication date Assignee Title
US2110218A (en) * 1935-11-27 1938-03-08 Binks Mfg Co Offset preventing in printing
US2110052A (en) * 1936-06-08 1938-03-01 Jens A Paasche Spray treating apparatus
US3333570A (en) * 1964-10-09 1967-08-01 Jens A Paasche Anti-ink offset powder assembly
DE2519831A1 (en) * 1975-05-03 1976-11-11 Platsch Zerstaeubung Albin DEVICE FOR POWDER INJECTION
DE2637875B2 (en) * 1976-08-23 1979-11-15 Albin Platsch Zerstaeubungstechnik, 7000 Stuttgart Device for regulating the amount of powder when dusting freshly printed sheets
US4622896A (en) * 1985-04-01 1986-11-18 Wizer Equipment, Inc. Powder spray gun
US4867063A (en) * 1986-11-25 1989-09-19 Gerald Baker Method and apparatus for dispensing powder in a printing press

Also Published As

Publication number Publication date
DE8814129U1 (en) 1990-03-15
JP2892729B2 (en) 1999-05-17
EP0442903A1 (en) 1991-08-28
DE58903420D1 (en) 1993-03-11
US5163370A (en) 1992-11-17
WO1990005064A1 (en) 1990-05-17
JPH04501388A (en) 1992-03-12

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