Sheet feeding or delivering – Feeding – Separators
Patent
1993-11-26
1996-06-18
Terrell, William E.
Sheet feeding or delivering
Feeding
Separators
271228, B65H 312
Patent
active
055270271
ABSTRACT:
A sheet feeder for a sheet-fed printing machine having a cylinder with a gripper system, movable suction conveyors for separating individual sheets from a sheet pile, the suction conveyors being disposed adjacent one another in a sheet-conveying direction, and groups of revolving adjustable conveying elements for aligning the sheets on a drive side and on an operating side of the printing machine in association with the suction conveyors and cooperating therewith for feeding the sheets to the gripper system of the cylinder of the printing machine, includes a drive system for driving the groups of conveying elements independently of one another and with varied speed so as to align the sheets on both of the sides of the printing machine, and a device disposed at locations of the revolving conveying elements for querying the sheet edges and for generating, in accordance with a response to a respective query, an electric pulse for controlling the drive system; and a method of separating and aligning the sheets in the sheet feeder.
REFERENCES:
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patent: 4696465 (1987-09-01), Willi
patent: 4971304 (1990-11-01), Lofthus
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"5000-pixel CCD Linear Sensor (B/W)", SONY, pp. 903-906.
Flade Gregor
Miltner Karl-Hermann
Greenberg Laurence A.
Heidelberger Druckmaschinen AG
Kelly Tamara
Lerner Herbert L.
Terrell William E.
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