US 3,976,291 AGranted

Arrangement for separating sheets of paper and the like

AssigneeGAO Gesellschaft fur Automation und Organisation mbH

InventorsHerbert Bernardi, Erhard Lehle, Joseph Geier, Gerd Von Aschwege, Markus Haberstroh

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Abstract

In the arrangement, a batch or stack of vertically oriented recording media sheets is supported on edge on a horizontal vibrating table which is vibrated by a vibrating conveyor and the sheets are advanced singly, starting with the leading or frontmost sheet, through a separating slot between a pair of endless belts constituting a transporting arrangement. A first rotating suction drum is mounted at the rear end of the vibrating table and is formed with circumferentially spaced suction bores for operative relation with a rotary slide valve to connect the suction bores intermittently to a suction system. A second rotating suction drum is arranged within the range of the separating slot and serves as a separating drum, and a hold-back suction drum is also arranged within the range of the separating slot and serves as a hold-back device, the hold-back suction drum having the same design as the first rotating suction drum. The second rotating suction drum is also operatively associated with a rotary slide valve and has a single series of slots aligned in an axial plane and intermittently connected to a suction system by the associated rotary slide valve.

Claims15

Dependent claims

In an arrangement for separating or singling out paper sheets, documents, and similar recording media from a batch, with several of the sheets of documents initially being moved toward a separating slot with the aid of an intermittent pull-off device and a vibrating device, after which the leading recording medium is extracted from the batch, with the aid of a further pull-off device and an intermittently acting device serving to hold back the trailing recording media, and fed to a transporting arrangement through the separating slot, the improvement comprising, in combination, a first rotating suction drum mounted at the rear end of the batch, considered in the direction of separation movement, and rotating in a direction to feed the leading recording media toward said separating slot to constitute said intermittent pull-off device, said first suction drum being formed with circumferentially spaced suction channels, a rotary slide valve operatively associated with said first suction drum and operable to connect said suction channels intermittently to a suction system;

a vibrating table supporting the batch;
a vibrator operable to vibrate said table;
said table and vibrator constituting said vibrating device;
a second rotating suction drum, formed with suction channels, arranged within the range of said separating slot and serving as a separating drum;
a rotating hold-back suction drum also arranged within the range of said separating slot and rotating in a direction opposite the direction of rotation of said first suction drum to serve as said hold-back device;
said hold-back suction drum being formed with circumferentially spaced suction channels;
and a second rotary slide valve operatively associated with said hold-back suction drum and operable to connect the suction channels thereof intermittently to a suction system.

4 more elements

Dependencies are inferred from the claim text.