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US 6,648,198 B2Granted
Vacuum belt conveyor
AssigneeVoith Paper Patent GmbH
InventorSylvain Demers
Life of this patent
Estimating the term…
Abstract
A vacuum belt conveyor includes an air-pervious endless belt, a first pulley positioned at the upstream end of the conveyor and a second pulley positioned at the downstream end of the conveyor, the pulleys guiding the belt when the belt is traveling. The endless belt comes into contact with a plate having openings which are connected to a source of negative pressure. The belt, in the area of the upstream end of the conveyor, is in contact with a curved and perforated guiding surface, with the perforations, being connected to a source of negative pressure.
Claims13
A vacuum belt conveyor, comprising:
- an air-pervious endless belt;
- a first pulley disposed at an upstream end of said conveyor and a second pulley disposed at a downstream end of said conveyor, said first pulley and said second pulley configured to guide said air-pervious endless belt, said air-pervious endless belt having a conveying run from said first pulley to said second pulley and a return run from said second pulley to said first pulley;
- a plate having openings which are connected to a source of negative pressure, said plate being in contact with said air-pervious endless belt over at least a portion of said conveying run;
- and
- a curved perforated guiding surface being connected to the source of negative pressure, said guiding surface proximate to said upstream end, said air-pervious endless belt being in contact with said guiding surface.
2 more elements
A vacuum belt conveyor, comprising:
- an air-pervious endless belt;
- a first pulley disposed at an upstream end of said conveyor and a second pulley disposed at a downstream end of said conveyor, said first pulley and said second pulley configured to guide said air-pervious endless belt, said air-pervious endless belt having a conveying run from said first pulley to said second pulley and a return run from said second pulley to said first pulley;
- a plate having openings which are connected to a source of negative pressure, said plate being in contact with said air-pervious endless belt over at least a portion of said conveying run;
- and
- a curved perforated guiding surface is formed as a rotary shell of said first pulley, said curved perforated guiding surface being connected to the source of negative pressure, said guiding surface proximate to said upstream end, said air-pervious endless belt being in contact with said guiding surface.
2 more elements
A vacuum belt conveyor, comprising:
- an air-pervious endless belt;
- a first pulley disposed at an upstream end of said conveyor and a second pulley disposed at a downstream end of said conveyor, said first pulley and said second pulley configured to guide said air-pervious endless belt, said air-pervious endless belt having a conveying run from said first pulley to said second pulley and a return run from said second pulley to said first pulley;
- a plate having openings which are connected to a source of negative pressure, said plate being in contact with said air-pervious endless belt over at least a portion of said conveying run;
- and
- a curved perforated guiding surface is formed as a curved stationary plate, said curved perforated guiding surface being connected to the source of negative pressure, said guiding surface proximate to said upstream end, said air-pervious endless belt being in contact with said guiding surface.
2 more elements
A vacuum belt conveyor, comprising:
- an air-pervious endless belt;
- a first pulley disposed at an upstream end of said conveyor and a second pulley disposed at a downstream end of said conveyor, said first pulley and said second pulley configured to guide said air-pervious endless belt, said air-pervious endless belt having a conveying run from said first pulley to said second pulley and a return run from said second pulley to said first pulley;
- a plate having openings which are connected to a source of negative pressure, said plate being in contact with said air-pervious endless belt over at least a portion of said conveying run;
- a curved perforated guiding surface being connected to the source of negative pressure, said guiding surface proximate to said upstream end, said air-pervious endless belt being in contact with said guiding surface;
- and
- at least one marginal nozzle disposed at said upstream end of said conveyor, said marginal nozzle configured to emit an air jet between a web delivering roll and one of a web and a tail, to urge one of said web and said tail onto said upstream end of said conveyor.
3 more elements
Dependencies are inferred from the claim text.