Sheet feeding or delivering – Delivering to stack and feeding therefrom – With sheet sensor for selective location
Patent
1986-06-30
1988-09-20
Schacher, Richard A.
Sheet feeding or delivering
Delivering to stack and feeding therefrom
With sheet sensor for selective location
271 35, 271 94, 271 99, B65H 304
Patent
active
047718960
ABSTRACT:
Apparatus which takes stacks of pre-formed, stored printed signatures and forms them into a uniform shingle, running at extremely high velocity, for transport into a processing device such as a rotary trimmer or quarter folder. The apparatus, in certain major aspects, includes an input conveyor and a support table creating a vertical queue stack of signatures which is maintained at very low but essentially constant weight and height by photocell control of the speed of a conveyor which adds signatures to the top of the stack, a conveyor belt running beneath the bottom of the stack in a cut-out region of the stack-supporting table, with sequential vacuum clutching to the tail portions of successive signatures caused by spaced rows of holes extending across that belt and registerable with longitudinal slots in a vacuum shoe beneath the belt. As each row of holes reaches and runs along the slots, vacuum action clutches successive signatures to the belt, and the signatures are pushed at a constant rate seriatim from the bottom of the stack to exit in overlapped, shingled relation through a gate. The shingle setback is determined by the spacing between rows of holes in the belt, and the velocity of the exiting shingle may be varied by changing the belt drive speed without affecting the shingle setback.
REFERENCES:
patent: 3522943 (1970-08-01), Swanson
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patent: 4046369 (1977-09-01), Kluge
patent: 4081181 (1978-03-01), Crowe
patent: 4361317 (1982-11-01), Lapp-Emden
patent: 4456241 (1984-06-01), Newsome
patent: 4463942 (1984-08-01), Newsome
patent: 4526359 (1985-07-01), Garavuso
patent: 4555101 (1985-11-01), Stobb
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