Adhesive bonding and miscellaneous chemical manufacture – Surface bonding means and/or assembly means therefor – With bending – folding – winding – or wrapping means
Patent
1992-10-14
1994-03-01
Simmons, David A.
Adhesive bonding and miscellaneous chemical manufacture
Surface bonding means and/or assembly means therefor
With bending, folding, winding, or wrapping means
156448, 156566, 156DIG26, 156DIG27, B65C 900
Patent
active
052903885
DESCRIPTION:
BRIEF SUMMARY
DESCRIPTION
The present invention refers to a labelling machine.
In the case of labelling machines, e.g. for bottles, glass jars and vessels, receptacles etc., it is common practice to subject, with the aid of a control means, the plates to specific rotary motions and rotary positions in the course of the labelling process, said rotary motions and positions being transmitted by frictional or positive engagement to the objects to be labelled, which are pressed onto the plates by the plungers and which, in turn, entrain said plungers which are supported in a freely rotatable manner. In cases of use in which the angular position of the plunger does not have any influence on the labelling process, this is absolutely unproblematic.
There are, however, also cases of use in which the angular position of the plunger during the labelling process has to be defined precisely. This is, for example, necessary when the plunger has on one side thereof a flattened contact surface for a label end projecting upwards beyond the object to be labelled, or is equipped with a controllable gripping finger for a label, or is provided with an opening permitting a label to be applied to the upper side of an object to be labelled, or when the surface of the object to be labelled which is seized by the plunger is eccentric with respect to the axis of rotation of the plate. In such cases, it is known to provide the plunger with a rotating means of its own. Such a labelling machine is described in German-Offenlegungsschrift 38 23 471.
The present invention deals with the problem of constructing in the case of a labelling machine according to the generic clause the rotating means, which is used for rotating the plungers, in a particularly simple and economy-priced manner.
In the case of a labelling machine according to the present invention, direct control of the plungers by the rotating means is only effected if said plungers are raised from the objects to be labelled, whereas indirect control of the plungers by means of the plates is effected if said plungers are pressed onto an object to be labelled. This permits a particularly simple and economy-priced structural design of the rotating means, and it is also easily possible to equip labelling machines which have already been delivered, subsequently with such a rotating means. Resetting of the rotating means will, in most cases, not be necessary, when the rotary program for the plates is changed; the rotating means mainly has to guarantee that the plunger will occupy a predetermined starting position, when it is applied to the vessel or the like. Complicated cam paths, which directly influence the plungers during the whole labelling process, can be dispensed with.
There are many possibilities of constructing the rotating means. The necessary starting position or neutral position of a plunger can, for example, be defined by two cooperating stop means in a very simple manner, one of said stop means being connected to the plunger and the other to the stationary part of the labelling machine. By means of a torsion spring acting on the plunger, the stop means are caused to engage as soon as the plunger has been raised from the object to be labelled. After having been applied to an object to be labelled, the plunger will then be entrained by said object against the force exerted by the torsion spring. In this case, the torsion spring of the rotating means will also be effective when the plunger has been applied to the object to be labelled, but a sufficiently weak dimensioning of said spring will guarantee that its force will easily be exceeded.
It will, however, be particularly expedient, when, in accordance with the further development of the invention, the rotating means is only effective as long as the plunger is not in contact with an object to be labelled. In this case, the plunger can rotate in the labelling area together with the object to be labelled completely unhindered without being obstructed by a torsion spring or the like.
On the basis of a further development, the necessary
REFERENCES:
patent: 4545832 (1985-10-01), Hoffmann
patent: 4594123 (1986-06-01), Eder
Engel, Jr. James J.
Krones AG Hermann Kronseder Maschinenfabrik
Simmons David A.
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