Sheet feeding or delivering – Delivering – Reciprocating conveyors
Patent
1984-06-20
1986-11-25
Paperner, Leslie J.
Sheet feeding or delivering
Delivering
Reciprocating conveyors
271176, 414 82, B65H 2910
Patent
active
046244557
ABSTRACT:
A sheet handling machine or stacker, designed to stack sheets in such manner as to avoid tumbling or other movement resulting in possible scratching or other surface marring. Our invention is especially applicable to sheets having a relatively soft surface such as plastic-coated sheet metal, highly polished stainless steel or the like, synthetic plastic such as "vinyl," paper-covered stainless steel, etc. Our invention contemplates a machine comprising a receiver having a lateral opening designed to receive a portion of a sheet. In operation, the receiver is moved through a predetermined trajectory. In its first position the receiver seats a portion of a sheet as from a conveyor, aligns it with a stack of similar sheets and then discharges it from a position above a stack of such sheets, allowing it to drop by gravity onto the stack through a free air cushion between sheet and stack, whereby the sheet is prevented from tumbling or otherwise falling haphazardly. Instead, the sheet drops in a substantially straight vertical trajectory. The receiver is then returned to its first position to repeat the operation. Preferably, the motion is activated by compressed air. Our invention covers both a machine and method for handling sheets.
REFERENCES:
patent: 2890675 (1959-06-01), Cheever, Jr.
patent: 3670611 (1972-06-01), Jarman
patent: 3729190 (1973-04-01), Harris et al.
patent: 3747920 (1973-07-01), Linkus
patent: 3891204 (1975-06-01), Mager
patent: 4055261 (1977-10-01), Schneider
patent: 4284382 (1981-08-01), Silverman
Flowers Thaddeus S.
Radek John R.
Lebowitz Samuel
Muncy Ken
Paperner Leslie J.
Ready Metal Manufacturing Company
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