Sheet feeding or delivering – Delivering – With transfer means between conveyor and receiver
Patent
1977-10-25
1978-10-10
Schacher, Richard A.
Sheet feeding or delivering
Delivering
With transfer means between conveyor and receiver
72 54, 72160, 162271, 264101, 425388, B65H 2968
Patent
active
041193091
ABSTRACT:
A device for removing curling tendency in sheets, particularly sheets fed to printing presses, in which the sheets are conveyed over two beam-like supporting members arranged transversely with respect to the direction of sheet movement and presenting supporting surfaces which are spaced parallel to one another on one side of the sheet to define a groove in between them. Suction is applied within the groove to draw a passing sheet downwardly into the groove to produce a relatively sharp concave bend in the sheet thereby to counteract the curling tendency. The cross-sectional profile of the groove is variable by a movable member to vary the profile of the groove and hence the degree of sharpness of the bend, thereby permitting the degree of correction to be varied while keeping the suction substantially constant. The device, in both preferred and alternate embodiments, has provision for removing curling tendency in opposite directions.
REFERENCES:
patent: 2531619 (1950-11-01), Gonia
patent: 4013284 (1977-03-01), Demetre
patent: 4060236 (1977-11-01), Carstedt
Mayer Peter
Simeth Claus
Roland Offsetmaschinenfabrik Faber & Schleicher AG
Schacher Richard A,.
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