Adjusting air system pressures stack height and lead edge gap in high capacity feeder
AssigneeXerox Corporation
InventorsRichard L. Dechau, William R. Haag, Michael J. Linder, Kenneth P. Moore
Life of this patent
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Abstract
The present invention is directed to device for feeding sheets seriatim from a stack. The sheet feed device includes a variable vacuum source being selectively actuable to acquire and release a top sheet from a stack; a feedhead, attached to the vacuum source to acquire the top sheet of the stack; a device to determine a plurality of predetermined properties of the sheets and to generate signals indicative thereof; and a controller to receive the generated signals and generate a signal to selectively control the vacuum source.
Claims11
A sheet feed apparatus for feeding sheets in seriatim from a stack, comprising:
- a variable vacuum source, said vacuum source being selectively actuable to acquire and release a top sheet from a sheet stack;
- a feedhead, attached to said vacuum source to acquire the top sheet of the sheet stack;
- a plurality of stack position sensors, each stack position sensor determining a distance between the feedhead and the sheet stack and generating a distance signal indicative thereof, the plurality of stack position sensors determining the distance between the feedhead and at least two locations on the sheet stack;
- an adjustable stack support, the stack support being adjustable to move the sheet stack in a direction normal to an acquisition surface of the feedhead and to tilt the sheet stack at an angle to the acquisition surface;
- and
- a controller responsive to the distance signals to generate a stack control signal to selectively adjust the adjustable stack support.
Dependencies are inferred from the claim text.