Apparatus for singularizing stacked portions of books and the li

Details Apparatus for singularizing stacked portions of books and the li Apparatus for singularizing stacked portions of books and the li

1990-01-10

1991-06-25

Spar, Robert J.

Material or article handling

Apparatus for moving intersupporting articles into, within,...

Unstacking apparatus

4147974, 4147976, 271 35, B65G 5906

Patent

active

050262505

ABSTRACT:
Apparatus for singularizing successive stacks of a series of stacks consisting of superimposed groups of sheets has a transporting unit which advances successive stacks of the series in a horizontal plane against a barrier which intercepts each but the lowermost group of the oncoming stack. An endless conveyor with one or more pushers is provided to advance successive lowermost groups of an intercepted stack through and beyond a clearance between the barrier and a stationary table of the transporting unit. The width of such clearance exceeds the height of a single group but is less than the combined height of two superimposed groups. The width of the clearance and the extent to which the pusher or pushers can extend above the horizontal plane are adjustable. The apparatus further comprises a gate which is pivotable behind an intercepted stack to a position in which it prevents advancement of a fresh stack toward the table and can bias each but the lowermost group of an intercepted stack against the barrier, and a raised position in which the conveyor of the transporting unit is free to deliver a fresh stack toward and into engagement with the barrier. The barrier is adjustable toward and away from the gate.

REFERENCES:
patent: 3622149 (1971-11-01), Enskat
patent: 4000821 (1977-01-01), Naito et al.
patent: 4192496 (1980-03-01), Baselice et al.
patent: 4202232 (1980-05-01), Muller
patent: 4369961 (1983-01-01), Gopel et al.
patent: 4805376 (1989-02-01), Oberdorf
patent: 4867433 (1989-09-01), Wells et al.

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