Sheet feeding or delivering – Delivering – With transfer means between conveyor and receiver
Patent
1994-05-09
1996-01-02
Bollinger, David H.
Sheet feeding or delivering
Delivering
With transfer means between conveyor and receiver
271183, 271198, 271203, B65H 4300
Patent
active
054801362
ABSTRACT:
In the case of a device for depositing sheets on a stack table having stack abutments, comprises a conveying system which includes a plurality of endless conveyor belts arranged in parallelism and mechanism to drive the conveyor belts at the same speed to convey the sheets separately in spaced relation to each other on an upper surface thereof, it is possible to ensure more gentle handling of the sheets and more reliable and troublefree operation together with operation at a higher speed if the device comprises a perforated belt system which overlaps the one end of the conveyor belt system and comprises a plurality of parallel endless perforated belts adapted to be driven by a motor at an adjustable speed, such perforated belt system extending over the stack table, a plurality of suction air ducts, which are respectively arranged behind each lower run of such perforated belt and are solely open toward the perforated belt, a source of vacuum which is connected with the ends of the vacuum ducts nearest to the conveyor belt system and is adapted to supply vacuum reducing the air pressure in the suction air ducts, and a motor control sensor adapted to respond to the leading edge of a sheet and to the fall of a sheet from the perforated belt duct system and able to be adjusted in the direction of movement of the sheet to a distance from the start of the suction air ducts, which is less than the sheet length, such sensor being adapted to accelerate the motor with the perforated belt system in alternation after the fall of a sheet to a high conveying speed and after engagement of the sheet to slow it down again.
REFERENCES:
patent: 3123354 (1964-03-01), Ungerer
patent: 3328027 (1967-06-01), Schmidtke
patent: 4824092 (1989-04-01), Kriefall et al.
Bollinger David H.
Franz Gremser KG
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