Device for attaching adhesive labels to packaged goods

Details Device for attaching adhesive labels to packaged goods Device for attaching adhesive labels to packaged goods

1998-02-25

2000-01-04

Crispino, Richard

Adhesive bonding and miscellaneous chemical manufacture

Surface bonding means and/or assembly means therefor

With work feeding or handling means

156566, 156542, 156DIG37, 156DIG28, B32B 3100, B65C 926, B65C 908

Patent

active

060099267

DESCRIPTION:

BRIEF SUMMARY
BACKGROUND OF THE INVENTION

The invention relates to a device for attaching adhesive labels to packaged goods.
It is conventional to attach identifying labels to packaged goods which provide certain information in regard to the goods, especially weight, price etc. Such labels are printed in a printer with the respective information after weighing of the goods and are subsequently attached to the packaged goods whereby mainly so-called adhesive labels are used.
The attachment of the adhesive labels onto packaged goods must take into consideration that the packaged goods, which are preferably transported by continuously or intermittently operating transport devices, have often different size, respectively, height measurements so that complicated controls for actuation of the device are required whereby this is often made even more complicated because the packaged goods are so-called soft packages.
It must furthermore be taken into consideration that the adhesive labels in general are relatively thin foil elements that during their transport, respectively, during their transfer to the device for attaching the adhesive labels onto the packaged goods are not exactly aligned within a single plane but are often wavy so that often malfunctions occur during transfer of a label to the device for attaching it onto the packaged goods.
The invention therefore has as an object to design a device for attaching adhesive labels onto packaged goods such that, on the one hand, a safe transfer of a label to the device and, on the other hand, a reliable attachment of the label to the packaged goods is ensured.


SUMMARY OF THE INVENTION

As a solution to this object a device for attachment of adhesive labels onto packaged goods is inventively provided that comprises a pneumatic cylinder with two air inlets that can be alternatingly connected to a compressed air source and/or a vacuum source, in which a piston is guided between an upper and a lower dead center position, which piston is connected to the upper end of a hollow piston rod which, within the pneumatic cylinder, has a lateral air opening and at its lower end, external to the cylinder, is provided with a suction holder that comprises a suction channel connectable axially to the hollow piston rod, and closeable relative to the hollow piston rod by a check valve, and further comprises an adhesive label transfer device with which a respective label is transported into a label transfer position at a small distance below the suction holder that is in its upper dead center position, and further comprises a control device for lowering the suction holder into the label transfer position.
An important feature of the invention is that the individual label is first guided to the suction holder at a certain distance so that labels that are wavy to a certain extent can be transported into a label transfer position by the suction holder without impediment, and that the suction holder is lowered onto the label only after the label has reached this transfer position. In this lowered position the suction holder is then provided with vacuum in order to receive the individual label from the transfer unit which is then returned in order to receive a further label that has been printed by the printer.
Further features and advantages of the invention result from the dependent claims.


BRIEF DESCRIPTION OF THE DRAWINGS

The invention will be disclosed in more detail with the accompanying drawings.
FIG. 1 shows a schematic representation of a side view of the inventive device with a printer arranged upstream and a transport device for supplying the packaged goods;
FIG. 2 shows a schematic representation of a side view of the transfer unit for transferring the printed labels to the inventive device;
FIG. 3 shows a bottom view of the device shown in FIG. 2;
FIG. 4 shows, partly in section and partly in a side view, the inventive device;
FIG. 5 shows, partly in section and partly in a side view, in an enlarged representation the piston unit of the inventive device;
FIG. 6 shows in a schematic

REFERENCES:
patent: 4124436 (1978-11-01), Pettis, Jr. et al.
patent: 4255220 (1981-03-01), Kucheck et al.
patent: 4475978 (1984-10-01), Bartl
patent: 4595447 (1986-06-01), Lindstrom
patent: 5750004 (1998-05-01), Wurz et al.

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