DE152275C

DE152275C -

Info

Publication number: DE152275C
Application number: DENDAT152275D
Authority: DE

Description

KAISERLICHESIMPERIAL

PATENTAMT.PATENT OFFICE.

Die Erfindung bezieht sich auf eine Schaltvorrichtung für die Farbwalzen an Farbdruck- und Prägepressen, durch deren Ausbildung ohne Vergrößerung des Wagenhubes in zuverlässiger Weise verhütet wird, daß die bei der Ausfahrt in Wirksamkeit zu setzenden Farbwalzen bereits während der Einfahrt mit der Druckform in Berührung kommen.The invention relates to a switching device for the ink rollers Color printing and embossing presses, thanks to their design without increasing the carriage stroke it is reliably prevented that the exit into effect inking rollers already in contact with the printing forme during entry come.

ίο Bekanntlich sind bei Farbdruck- und Prägepressen der Bewegung des Farbwalzenwagens ganz bestimmte Grenzen gesetzt, d. h. es kann dessen Hub nur verhältnismäßig gering bemessen werden, so daß besonders bei Maschinen mit großer Form die jeweilig erste Walze des ausgefahrenen Farbwalzenwagens sich in fast unmittelbarer Nähe der Form befindet und aus diesem Grunde bei der Einfahrt die rechtzeitige Außerbetriebsetzung der bei der Ausfahrt zur Einfärbungzubenutzenden Walze große Schwierigkeiten bereitet.ίο It is well known that in color printing and embossing presses the movement of the inking roller carriage set very specific limits, d. H. its stroke can only be dimensioned relatively small, so that especially In the case of machines with a large shape, the respective first roller of the extended inking roller carriage is almost in the immediate vicinity the form and for this reason the timely decommissioning at the entrance the roller to be used at the exit for inking causes great difficulties.

Die bisher bei den Pressen genannter Art angebrachten Schaltvorrichtungen konnten das vorzeitige Auftreffen der bei der Rückfahrt oder Ausfahrt in Wirksamkeit zu setzenden Farbwalzen deshalb nicht verhüten, weil bei denselben die jeweilig in der Fahrtrichtung vorauseilende Farbwalze außer Wirksamkeit gesetzt wird und wegen des geringen wagerechten Abstandes dieser Walze von der Form die Schaltvorrichtung nicht genügend Zeit findet, die zur Rückwärtsfärbung bestimmte Walze aus dem Bereich der Form zu bringen.The switching devices previously installed on the presses of the type mentioned could Therefore do not prevent the premature impact of the inking rollers to be activated on the return journey or exit, because with the same the respective inking roller hurrying ahead in the direction of travel is out of action is set and because of the small horizontal distance of this roller from the mold, the switching device is not sufficient Finds time to move the roller intended for reverse inking out of the area of the mold.

Die Beseitigung dieses längst erkannten Mangels scheiterte immer an der Unmöglichkeit, den Hub des Farbwalzenwagens zu vergrößern, aus welchem Grund die bisherige Schaltvorrichtung trotz der mangelhaften Einfärbung beibehalten wurde.The elimination of this long-recognized deficiency always failed due to the impossibility to increase the stroke of the inking roller carriage, for which reason the previous switching device despite the inadequate Coloring was retained.

Durch den Gegenstand der Erfindung soll nun eine gleichmäßige Einfärbung ohne Veränderung der Wagenbewegung dadurch erzielt werden, daß die jeweilig vor der Bewegungsrichtung liegende Farbwalze mit der Form in Berührung gebracht und die hintere, also in größerem wagerechten Abstande von der Form befindliche Walze außer Wirksamkeit gesetzt wird; denn da letztere, wie bereits erwähnt, sich in größerer wagerechter Entfernung von der Form befindet, ist trotz des geringen Wagenweges genügend Zeit zum Ausschalten der jeweilig hinteren Farbwalzen vorhanden.The subject matter of the invention is intended to produce a uniform coloring without any change the carriage movement can be achieved in that the respective in front of the direction of movement lying inking roller brought into contact with the form and the rear, i.e. at a greater horizontal distance from the roller located in the mold is disabled; because there the latter how already mentioned, is at a greater horizontal distance from the form, is despite the short carriage travel enough time to switch off the respective rear inking rollers available.

Ähnlich arbeitende Schaltvorrichtungen, bei denen gleichfalls die jeweilig hinteren Walzen außer Wirksamkeit gesetzt werden, haben bei Tiegeldruckpressen bereits Verwendung gefunden, und zwar erhält bei diesen Schaltvorrichtungen der Schalthebel seine Bewegung durch am Ende der Bahn angebrachte Anschläge, derart, daß der Farbwalzenwagen mindestens um das Maß der Schalthebelbewegung nach beiden Richtungen über die Druckform hinaus bewegt werden muß.Switching devices that work in a similar way, in which the respective rear ones are also used Rolls that are disabled are already used in platen printing presses found, and in these switching devices, the switching lever gets its movement through at the end of the path Attached stops, such that the ink roller carriage at least by the amount of Shift lever movement can be moved in both directions beyond the printing form got to.

Diese Art der Schaltbewegung hat somit zur Voraussetzung, daß dem Farbwalzenwagen eine sehr große Bewegung erteiltThis type of switching movement is therefore a prerequisite that the inking roller carriage issued a very large movement

Claims

can be done, which is not difficult to do with platen printing presses, but with color printing and embossing presses are done. Knee-lever operated presses 'insurmountable difficulties'.

In order to avoid the premature touch of the respective As already mentioned, preventing the roller with the printing form from being switched off is also

ίο in the present invention, the switching device designed so that the respective rear ink roller is disabled, but with the difference, that the distance of the respective rear inking roller from the printing form for their deactivation is made usable, d. This means that the respective rear inking roller receives its movement during the entry of the car, so that now also an enlargement for the switching movement the carriage lift is not required.

In the drawing are two different embodiments of the movement device shown.

Fig. Ι shows the extended, provided with two rollers inking roller carriage,

2 shows a carriage equipped with four rollers in the same position.

In the embodiment according to FIG. 1, the pressure levers aa ^x , which are known per se and are held movably about bolts i , are equipped with toothed segments ν ν ^λ , with which the toothed segment η of the switching lever b , which oscillates about bolt 0, meshes next to the track of the roller carriage d is moved web g and is brought by this depending on the direction of travel in one or the other inclined position.

If the inking roller carriage d now moves towards the form k (FIG. 1), the lever b is rotated to the left by the path g , with the result that the lever a lifts off the bearing of the front roller, whereas the lever a ¹ swinging downwards depresses the rear roller bearing and thereby deactivates the rear roller before it can come into contact with the form k.

The same game is repeated on the exit in the opposite sense.

If the carriage d has four or more ■ rollers (Fig. 2), the hammer-shaped levers ρ ρ ¹ , which can be moved around i between each pair of rollers, are to be connected by a rack h which can be moved in a suitable manner on the roller carriage d and which, with its teeth, is connected to the Toothed segment η of the shift lever. b combs.

Via the pins in arranged on the rack h , the vertical, fork-shaped legs of the lever p engage, so that the latter are forced to rotate around the pin i when the rack h is longitudinally displaced.

Even with this version of the. Switching device are the respective rear Inking rollers of both roller pairs are deactivated when the roller carriage has reached the end of its path moves towards the printing forme again.

Since the pressure lever α a ¹ respectively. pp ¹ are set into equilibrium by the bearings raised by the springs pushed underneath when the carriage is extended, this also causes the vertical adjustment of the shift lever b.

Godfather nt-A ν SPRU CH:

Switching device for the ink rollers on ink printing and embossing presses with ink rollers which can be switched off alternately at the beginning of the carriage movement and which receive their movement by a lever running onto a fixed track, characterized in that the switching lever (b) running onto the track (g ) with Toothed segment (η) is provided and with the likewise toothed pressure lever (aa ¹ J or with a rack (h) moving several pressure levers (ρ ρ) simultaneously so that the respective rear inking rollers are disabled.

1 sheet of drawings.