Sheet Stacker

Details Sheet Stacker Sheet Stacker

1989-07-03

1991-01-29

Schacher, Richard A.

Sheet feeding or delivering

Delivering

Rotary conveyor

271220, B65H 2922

Patent

active

049880870

ABSTRACT:
A sheet stacker and an automatic printing machine containing a sheet stacker are provided comprising a generally horizontal stacking platform having an outboard and an inboard end, an arcuate turn baffle at the inboard end of the platform for guiding and turning sheets onto the platform having a convex side forming a drive nip with a sheet drive assembly comprising a rotatable dirve shaft having fixedly mounted thereto as least one cylindrical, compressible foam drive roll and least two cylindrical fiber brushes, the diameter of the fiber brushes being greater than the diameter of the foam drive rolls whereby the brushes when rotated urge the lead edge of a sheet being fed generally vertically downward toward the nip formed between the foam rolls and the baffle to enable the foam rolls to actively drive the sheet through the nip around the turn baffle onto the support platform toward the outboard end.

REFERENCES:
patent: 3523687 (1970-08-01), Petersen
patent: 3815899 (1974-06-01), Hatzmann
patent: 4056264 (1977-11-01), Dhooge et al.
patent: 4330116 (1982-05-01), Newsome
patent: 4428574 (1984-01-01), Kataoka
patent: 4431177 (1984-02-01), Beery et al.
patent: 4589654 (1986-05-01), Kanoto
patent: 4767114 (1988-08-01), Nishimoto
patent: 4824091 (1989-04-01), Knight

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