Printing – Bed-and-platen machines – Web
Reexamination Certificate
2002-11-06
2004-07-13
Yan, Ren (Department: 2854)
Printing
Bed-and-platen machines
Web
C101S227000, C101S066000, C101S348000, C101S349100
Reexamination Certificate
active
06761113
ABSTRACT:
BACKGROUND OF THE INVENTION
The invention relates to a printing device for printing labels which have been removably affixed to a carrier strip, in particular goods labels, comprising at least one label feed device which comprises at least one wiper head, as well as comprising at least one printer with at least one print head for printing the label.
A printing device of this type is known from the state of the art. For example, a portable labelling device for affixing and delaminating printed labels is known from DE 32 16 258 A1. In this labelling device, the labels are arranged one behind the other on a carrier belt.
Furthermore, from U.S. Pat. No. 3,997,384, a device comprising a multitude of permanent label feed devices is known.
Such known printing devices are associated with a disadvantage in that, when a different label model is required, e.g., involving a different color, graphic design or text, it becomes necessary to manually exchange the carrier strip with the labels (ticket roll, tape of flat folded labels sold under the trademark LIPORELLO™). This precludes operation using a variety of labels. If during a labeling process, different label types are required, in particular if the choice of model only results from parameters obtained immediately prior to printing, as may for example be the case where there is a combination of a printer and a weighing device, such labelling devices cannot be used.
It is desirable that labelling can be carried out with various label models.
In this context it must be borne in mind that the goods to be labelled are acquired by means of an automatic pattern recognition device, and depending on the object to be labelled, one of many different labels is selected. However, there may also be a need for weight-dependent or piece-number-dependent printing and labelling or labelling based on input by an operator or by a computer system.
With known labelling devices, in the most unfavourable case, the ticket roll has to be exchanged between each label. This makes economical labelling quite impossible.
From U.S. Pat. No. 4,768,435, an option is known which ensures uninterrupted operation. This printed publication proposes the use of two printers for printing two different models. Since a printer accounts for a significant part of the expense of a labelling device and also takes up additional room, such a device becomes considerably more expensive as the number of different label models increases.
EP 0 309 659 and EP 0 362 976 describe a device for printing several models without the need to change the model roll. These devices make do with a single printer. It is proposed that pieces of paper be printed which after completion of the printing process are cut off. In this way it is possible to advance the beginning of a selected paper supply roll, lead it to the printer, cut it off, and after completion of the printing process push the free beginning back again, before selecting the beginning of another supply roll.
However, such a process is not possible if instead of paper pieces, self-adhesive labels affixed to a carrier strip are to be printed. This is because after printing and removing a label, the label-free carrier strip remains and has to be accommodated again. In addition, the carrier strip must be kept taut so as to ensure good quality label printing.
SUMMARY OF THE INVENTION
It is thus the object of the invention to be able to print different label models in a continuous labelling process, using at least one printer.
According to the invention, the object derived and explained above is met in that a conveyor device is provided which conveys to a printer the label which has been peeled off at the wiper head. The labels, which depending on particular requirements are peeled off at the wiper heads or wiper edges by the respective label feed devices, are conveyed to the printer. Said printer can then print the labels as specified by a control system. The printed labels are then affixed to the goods by means of a labelling device. A multitude of label feed devices can be arranged along the conveyor device. The maximum number of label feed devices is determined by the size of the conveyor device as well as by the time allowed for label feed from the wiper head to the printer. The label which is peeled off from that wiper head which is located the largest distance away from the print head, must be able to be conveyed to the printer within the permitted time span. The conveyor device according to the invention makes it possible to mix and print the labels of the various label feed devices at will.
By using at least one conveyor device which comprises at least one label transfer station, said conveyor device, of which there is at leat one, conveying the labels peeled off at the wiper head of which there is at least one, to the printer of which there is at least one, wherein at first a first conveyor device conveys the label peeled off from the carrier strip and transfers the peeled-off label at least once at the label transfer station to the same first conveyor device or to a further conveyor device, the label to be printed can be conveyed even along substantial distances. The use of the same type of conveyor device, or of different types of conveyor devices, is possible.
It is also possible to provide at least two different conveyor devices which convey the label peeled off at the wiper head, of which there is at least one, to the printer, of which there is at least one, wherein at first the first conveyor device conveys the label and then the second conveyor device conveys the label. The use of different conveyor devices makes it possible to flexibly arrange the printing device and to adapt it to the particular circumstances of the available space and the process technology used.
A printing device is proposed in which the conveyor device, of which there is at least one, is a conveyor belt, and in which the conveyor belt conveys the peeled-off labels to the printer, of which there is at least one. The conveyor belt can be any of the following: an elastic belt, a plate belt, a chain or any other belt which essentially is tensioned between at least two rotating cylinders which are arranged so as to be axially parallel to each other. The labels can be quickly conveyed to the printer by way of the conveyor belt. Immediately after the printing process, the conveyor belt can convey the printed label to a labelling device.
The necessary design space can be limited by using a conveying roller which conveys the peeled-off labels to the printer, of which there is at least one. If a conveying roller is used, the printed labels can also be fed to a labelling device directly after the printing process. In this arrangement, the conveying roller may be a conveyor drum.
The conveyor device, of which there is at least one, can be a plate, with the plate carrying out either a rotary movement or an oscillating movement. In the case of a rotary plate, the label feed devices are arranged along a radius of the plate. In this way, the rotary movement causes the peeled-off labels to be conveyed to a printer, of which there is at least one, which printer is arranged at the same radius of the plate. A plate which essentially oscillates along the horizontal axis, first moves to the label feed device which requires the next label, picks this label up at the wiper head and then moves to the printer. At the printer, the label is printed. After the label has been printed, it must be removed from the plate by a gripper arm and must be conveyed to a labelling device.
The printed labels are taken up by at least one labelling device and are affixed to the product. The labelling device is arranged along the path of conveyance of the objects to be labelled and takes up the labels which have been printed by the printer, of which there is at least one. After the labels have been taken up, they are placed onto the objects to be labelled and are affixed.
A particularly simple and reliable option of feeding the carrier strips to the wiper heads, results from an embodiment of the print
Espera Werke GmbH
Evans Andrea H.
Proskauer Rose LLP
Yan Ren
LandOfFree
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