Sheet feeding or delivering – Feeding – Separator and conveyor
Reexamination Certificate
2000-03-14
2001-09-18
Bollinger, David H. (Department: 3651)
Sheet feeding or delivering
Feeding
Separator and conveyor
C271S010110, C271S149000
Reexamination Certificate
active
06290223
ABSTRACT:
The present invention concerns a device for individually feeding flat products, such as sheets of paper or cards to a processing station, for example a scanner, a reader, a computer peripheral or a printer.
The invention concerns more particularly a device of this type in which the products to be supplied are not stacked, but are juxtaposed inside a vertical feed attachment.
Feed devices with vertical feed attachments, wherein the sheets are evacuated downwards via the effect of gravity, are already known, in particular from French Patent No. 2 546 820 and Japanese Patent No. 7 172 597. However, these devices have the drawback that several sheets are liable to be fed simultaneously to the processing station, which can cause the device or processing station to jam. In the absence of such a jam, the simultaneous feeding of several sheets has the effect of concealing the sheets driven simultaneously with the first sheet of the pile. They can thus not be processed, which, particularly in the case of feeding a scanner, is a major drawback.
The object of the present invention is to overcome the drawbacks of the aforementioned prior art by providing a device which allows only one product to be fed at a time.
The device according to the invention thus concerns a feed attachment having a wall with substantially vertical orientation, against which the products are juxtaposed, and a system for extracting said products to feed them one by one to the processing station. This device is principally characterised in that the extraction system includes:
means for applying a force to press against said wall the product which is nearest thereto,
means for driving said nearest product to move it upwards,
grasping means for loading said product when it has been moved over a predetermined distance by said driving means,
means for detecting the loading of the product by said grasping means, these detection means being capable of supplying a detection signal and
control means responding to said detection signal to give a command to said applying means to exert said force as long as the product has not been loaded by the grasping means and to cease applying said force as soon as the product has been loaded, so as to cause the products other than the product in contact with the wall to fall back into the feed attachment.
REFERENCES:
patent: 4640602 (1987-02-01), Redding et al.
patent: 4795145 (1989-01-01), Fuller
patent: 5836581 (1998-11-01), Vernackt
patent: 2546820 (1984-12-01), None
patent: 7-172597 (1995-07-01), None
Bardet Jean-Luc
Lautenschlager Pierre-Andre
Roux Jean
Axiome Alpha S.A.
Baker & Botts L.L.P.
Bollinger David H.
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