Sheet feeder unit

Details Sheet feeder unit Sheet feeder unit

1994-09-16

1997-01-21

Terrell, William E.

Sheet feeding or delivering

Feeding

Separator and conveyor

271270, B65H 508

Patent

active

055953816

ABSTRACT:
The invention relates to a sheet feeder unit with a suction head unit whereby sheets are removed individually from a sheet pile, fed to a belt table, and conveyed by the belt table to a sheet-processing machine. The suction head unit and the belt table are driven in phase with the sheet processing machine. Further, the belt table is driven in a periodic manner so that the transfer of sheets from the suction head unit to the belt table occurs at the slowest conveying speed of the belt table. The actual time of reaching the transfer position to the sheet-processing machine is recorded by the respectively foremost sheet located on the belt table and is compared with a reference time. Furthermore, the operating cycle of the suction head unit is corrected to be advanced or retarded in accordance with the deviation of the reference time from the actual time.

REFERENCES:
patent: 2661948 (1953-12-01), Montgomery
patent: 2756049 (1956-07-01), Stolz
patent: 3861672 (1975-01-01), Norton
patent: 4189136 (1980-02-01), Robinette
patent: 5112038 (1992-05-01), Dunaway
patent: 5295677 (1994-03-01), Hutner

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