Sheet feeding or delivering – Delivering – To receiver for pack of sheets
Reexamination Certificate
1999-04-19
2001-05-08
Skaggs, H. Grant (Department: 3651)
Sheet feeding or delivering
Delivering
To receiver for pack of sheets
C271S210000
Reexamination Certificate
active
06227538
ABSTRACT:
BACKGROUND
The present invention relates to a paper tamping mechanism and more particularly to a paper tamping mechanism which assures that sheets deposited on a stack of sheets are tamped down so that the uppermost sheet lies flat on the stack.
Handling of paper sheets often involves depositing individual sheets of paper in an accumulating area. The sheets are deposited one on top of the other to form a stack in the accumulating area. Since the individual sheets are light and are fed from a source spaced from the accumulating area, the sheet being deposited sometimes may not lie flat on the stack. If this occurs, it may interfere with the transfer of the stack of sheets to some other unit or with some additional function the stack may be subjected to.
OBJECTS
The present invention avoids this problem and has for one of its objects the provision of an improved paper tamping mechanism for assuring that the topmost sheet deposited on a stack will be tamped down so that it will lie flat on the stack.
Another object of the present invention is the provision of an improved paper tamping mechanism which is operated with a minimum of moving parts.
Another object of the present invention is the provision of an improved paper tamping mechanism which is simple to operate and inexpensive to manufacture.
Other and further objects will be obvious upon the understanding of the illustrative embodiment about to be described, or which will be indicated in the appended claims, and various advantages not referred to herein will occur to one skilled in the art upon employment of the invention in practice.
These objects are accomplished by providing a tamping blade adjacent the stack which moves down to strike the topmost sheet as soon as it is deposited on the stack in order to flatten the sheet on top of the stack. In the preferred embodiment of the invention, the tamping blade has a permanent magnet therein which reacts with permanent magnets on a rotatable magnetic wheel or cylinder adjacent thereto. The permanent magnet in the tamping blade is of one polarity and the permanent magnets in the magnetic wheel are alternately magnets with positive and negative polarities. When the magnetic wheel is rotated, as soon as the permanent magnet on the wheel with a polarity the same as the polarity of the permanent magnet in the tamping blade are adjacent to each other, the magnets repel each other and the tamping blade will move down and strike the topmost sheet in order to lay it perfectly flat on the stack. As the magnetic wheel continues to rotate and a permanent magnet in the wheel of a polarity different from the polarity of the tamping blade magnet are adjacent to each other, the magnets will attract each other and the tamping blade will move up away from the stack in order to permit another sheet to be deposited on top of the stack.
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GBR Systems Corporation
Previto Joseph J.
Skaggs H. Grant
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