Sheet feeding or delivering – Delivering to stack and feeding therefrom – Feeding from bottom of stack
Reexamination Certificate
1999-12-09
2001-07-31
Olszewski, Robert P. (Department: 3651)
Sheet feeding or delivering
Delivering to stack and feeding therefrom
Feeding from bottom of stack
C271S003200, C271S004100, C271S010110, C271S100000, C271S104000, C271S207000
Reexamination Certificate
active
06267367
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates to a device for collecting and transferring cut paper products etc., comprising a feeder for the cut products to be collected, a storage device for collecting the cut products, and a transport device for the collected cut products.
2. Description of the Related Art
Such devices are known in various embodiments. They are designed to collect flat paper sheets, plastic sleeves etc., which are usually very soft and flexible and are therefore difficult to manipulate. These products, which are, in general, referred to as cut products or blanks, are continuously fed without interruption by the feeder in order to be collected as a stack of a larger or smaller number of sheets and to then be placed onto the transport device.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide a device of the aforementioned kind which collects reliably such flexible cut products or blanks at high speed and which is at the same time of a compact design, i.e., requires minimal space.
In accordance with the present invention, this is achieved in that at the entrance of the storage device a collecting tray for collecting the cut products is provided and that below the collecting tray a rotatably driven transfer drum is positioned having a gripping device for a selected number of collected cut products and for placing the selected number of collected cut products onto the transport device after rotation of the transfer drum by a preset angle.
Inventively, an in-process storage device having a collecting tray is provided to which the cut products to be collected are supplied continuously. When a certain number of cut products has been received in the collecting tray, the cut products are transferred onto the rotatably driven transfer drum without having to interrupt the feeding action of further cut products to the collecting tray. The rotary speed of the transfer drum is so great that it is always ready to receive a new stack of collected cut products when the selected number is present in the collecting tray. The preset number of cut products collected in the collecting tray and stacked therein are gripped by the gripping device and placed onto the transport device by rotation of the transfer drum about the preset rotary angle. The rotary movement of the transfer drum continues until it is again in the receiving position in which a new stack of cut products can be received from the collecting tray. This device can be realized in a compact design as a table model wherein the transfer drum is positioned below the plane of the collecting tray.
The device is, in particular, designed such that the gripping device has a gripping member which is moveable into a securing or gripping position by pivoting counter to the rotational direction of the transfer drum.
In a preferred embodiment, separating fingers are provided between the collecting tray and the transfer drum. They separate the preset number of collected cut products from the following cut products and transfer them onto the gripping device.
The separating fingers are arranged on a rotatably driven rotor and extend parallel to the axis of rotation of the rotor, wherein the axis of rotation of the rotor is parallel to the rotational axis of the transfer drum.
Preferably, two symmetrically arranged and oppositely positioned rotors with facing separating fingers are provided.
At the exit of the collecting tray a separator for separating the desired number of cut products is provided. The separator is realized as a flat separating blade that can be moved between the cut products fed to and received in the collecting tray.
The rotary angle of the transfer drum, at which the placement of the cut products onto the transport device occurs, is determined by a stripping blade. The angle is approximately 180°.
Especially the arrangement of the separating fingers at corresponding rotors ensures that the collected stack in the collecting tray is moved or forced into the area of the gripping device of the transfer drum.
The rotary speed of the transfer drum and of the rotors which support the separating fingers is synchronized so that a cycled transfer can take place. Advantageously, the rotary transfer drum and the rotors have separate drives.
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Kueffner Friedrich
Olszewski Robert P.
Pfankuch Maschinen GmbH
Ridley Richard
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