SU454153A1 - Device for the single issue of sheets from the package - Google Patents

Description

one

This invention relates to sheet layout.

A device for single delivery of sheets from a bag is known, comprising a belt conveyor, suction chambers located above the lower branch, and a lifting table.

The aim of the invention is to eliminate the mechanisms regulating the magnitude of the lifting force and to ensure the piece-by-sheet delivery of sheets from the bag with a constant interval between them.

For this purpose, the suction chambers, alternately, are connected to two separate suction channels, one of which is made with a slit in the path of the sheet.

FIG. 1 shows the proposed device, a longitudinal section; in fig. 2 is a cross-sectional view along A-A in FIG. one; in fig. 3- intermediate positions of the sheet on the device in the process of unfolding.

The device consists of a lifting table 1, which is adjustable in height as the bundle of sheets 2 is disassembled. Above the lifting table is a belt conveyor 3 made of separate narrow belts 4 with a certain gap. Above the lower branch there are two rows of transverse chambers 5 and 6, connected in series through one through 2

piping 7 and 8 to fans 9 and 10.

The device works as follows. The stack of sheets 2, mounted on the lifting table I, rises to a certain distance between the upper plane of the bag and the lower branch of the conveyor, which ensures the lifting of the sheet from the bag. The captured sheet from the bag is pressed against the belts of the conveyor 3 and begins to move along with the conveyor in motion. As it moves, due to the fact that the lower branch of the conveyor crosses the suction pipe 8, the sheet also intersects this pipeline, disconnecting from the operation of chamber 6. As a result, the lifting force decreases as the vacuum is maintained only in chambers 5, but remains sufficient to keep the sheet on lower branch of the conveyor.

After the sheet passes through the suction line 8 in the chambers 6, a vacuum is again created, which entails an increase in lift. The next sheet is grabbed, after which the cycle repeats.

Subject invention

A device for single-sheet dispensing of sheets from a package, comprising a belt conveyor, suction chambers located above the lower branch of the conveyor, and a lifting table, characterized in that, in order to exclude mechanisms regulating the magnitude of the lifting force, and to ensure the sheet distribution from the package with a constant spacing between them, the suction chambers, alternately, are connected to two separate suction channels, one of which is made with a slit in the path of the sheet

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