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US 2024/0124256 A1Published application
Stacker for stacking sheets, and related method
AssigneeFosber S.p.A.
InventorLorenzo Vannucchi
Life of this patent
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Abstract
The stacker comprises two stacking platforms and a system for conveying corrugated board sheets, configured to discharge the sheets alternatively onto one or the other of the two stacking platforms. A switching device allows for a quick switch of the conveyor system from one to the other of two operating conditions.
Claims18
A stacker for stacking sheets, including:
- a first conveyor, comprising an entrance end and a discharge end for the sheets;
- a first stacking platform, arranged to receive sheets discharged from the discharge end of the first conveyor;
- wherein the first stacking platform is provided with a vertical lifting and lowering movement in a first stacking bay to allow forming stacks of sheets on the first stacking platform;
- along the first conveyor, a device for interrupting a flow of shingled sheets moving forward along the first conveyor;
- a second conveyor, comprising an entrance end and a discharge end for the sheets and arranged in series with the first conveyor;
- a second stacking platform arranged to receive sheets discharged from the discharge end of the second conveyor;
- wherein the second stacking platform is provided with a vertical lifting and lowering movement in a second stacking bay to allow forming stacks of sheets on the second stacking platform;
- a switching device for arranging the discharge end of the first conveyor and the entrance end of the second conveyor selectively:
- in a first position, where the discharge end of the first conveyor is misaligned relative to the entrance end of the second conveyor and positioned to discharge sheets from the first conveyor onto the first stacking platform;
- and
- a second position, where the discharge end of the first conveyor is aligned with the entrance end of the second conveyor to convey the sheets from the entrance of the first conveyor along the first and the second conveyors and to discharge the sheets onto the second stacking platform.
8 more elements
A method for forming stacks of sheets in sequence, comprising the steps of:
- conveying a flow of shingled sheets along a first conveyor extending from an entrance end to a discharge end for the sheets;
- discharging sheets from the discharge end of the first conveyor onto a first stacking platform, by gradually lowering the first stacking platform moving it away from the discharge end of the first conveyor and keeping the discharge end of the first conveyor in a position where the sheets are supplied to the first stacking platform, and forming a stack of sheets on the first stacking platform;
- forming a first gap in the flow of sheets along the first conveyor;
- when the first gap in the flow of sheets achieves the discharge end of the first conveyor, aligning the discharge end of the first conveyor with an entrance end of a second conveyor;
- conveying a flow of shingled sheets sequentially along the first conveyor and the second conveyor, that are aligned with each other, and discharging the sheets from a discharge end of the second conveyor onto a second stacking platform, by gradually lowering the second stacking platform moving it away from the discharge end of the second conveyor;
- forming a second gap in the flow of sheets along the first conveyor;
- when the second gap in the flow of sheets achieves the discharge end of the first conveyor, moving the discharge end of the first conveyor into a position where the sheets are supplied to the first stacking platform;
- conveying the flow of shingled sheets along the first conveyor and discharging the sheets from the discharge end of the first conveyor onto the first stacking platform, by gradually lowering the first stacking platform moving it away from the discharge end of the first conveyor.
5 more elements
Dependencies are inferred from the claim text.