Sheet feeding or delivering – Feeding – With means to interrupt feeding
Patent
1993-09-20
1994-09-20
Olszewski, Robert P.
Sheet feeding or delivering
Feeding
With means to interrupt feeding
271105, 271107, B65H 712
Patent
active
053482867
ABSTRACT:
Device for controlling an individual separation of sheets incorrectly separated from a sheet pile, including a lifting device for lifting an uppermost sheet of the sheet pile so as to feed it to a machine associated therewith, includes a structure having parts of a contactless measuring arrangement insertable between the lifted sheet and the remainder of the sheet pile for measuring the thickness of the lifted sheet, and a circuit arrangement connected to the lifting device and the measuring arrangement for evaluating signals of the measuring arrangement regarding a presence of double or multiple sheets and generating a switching signal for starting or stopping the operation of the lifting device, the structure being formed as a bifurcated contact foot having two legs and a scanning gap defined therebetween, each of the legs, respectively, including parts of the measuring arrangement for measuring the sheet thickness and, in a measuring position of the measuring arrangement, one of the legs being inserted between the lifted uppermost sheet, at a marginal region thereof, and the sheet pile remainder, the other of the legs being disposed above the lifted sheet, and the sheet being received in the scanning gap.
REFERENCES:
patent: 3744787 (1973-07-01), Morrison
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patent: 3993303 (1976-11-01), Riedl et al.
patent: 4462585 (1984-07-01), Gieson et al.
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patent: 4533133 (1985-08-01), Hams
patent: 4697246 (1987-09-01), Zemke et al.
patent: 4728097 (1988-03-01), Vandersyde et al.
Druzbick Carol Lynn
Greenberg Laurence A.
Heidelberger Druckmaschinen AG
Lerner Herbert L.
Olszewski Robert P.
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