Device for controlling the means delivering sheets to a machine

Details Device for controlling the means delivering sheets to a machine Device for controlling the means delivering sheets to a machine

2005-04-05

2005-04-05

Walsh, Donald P. (Department: 3653)

Sheet feeding or delivering

Feeding

Pack holders

C271S155000, C414S796700, C414S926000

Reexamination Certificate

active

06874780

ABSTRACT:
A device for controlling delivery of sheets from a stack includes a lift for a stack of sheets. A sheet inserter removes sheets from the top of the stack to move them. A detector detects the front top level of the stack and measures the extent of variations in the level of the stack. A computer receives a measurement from the detector and acts on a first electric motor for the lift to raise the stack. A source of information connected to the computer relates to the supply frequency in real time and to the nominal thickness of the sheets. The computer output is connecting to a sheet supply frequency varying device for controlling the first motor to the lift. The computer is programmed so that the signal at its output is characteristic of the difference between the measured level of the stack and the calculated level thereof. An auxiliary supply device may support and raise the stack, based on the computer program, independently of the lift.

REFERENCES:
patent: 4021710 (1977-05-01), Fichte et al.
patent: 4610444 (1986-09-01), Lang et al.
patent: 4832329 (1989-05-01), Rodi et al.
patent: 5295678 (1994-03-01), Lindner et al.
patent: 5556252 (1996-09-01), Kuster

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