Method and device for contact-free retention of sheets
AssigneeHeidelberger Druckmaschinen AG
InventorsPeter Hachmann, Uwe Tessmann
Life of this patent
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Abstract
A method of retaining a sheet on at least one of a transfer cylinder and a guide surface of a sheet-guiding device in a sheet-processing machine by pneumatically activatable nozzles for producing an air cushion beneath the respective sheet, which comprises producing an air cushion by an air-pressure distribution resulting in air flows beneath the respective sheet, the air-pressure distribution being based virtually only on radially decelerated air flow, and being capable of retaining the respective sheet in position; and a retaining device for performing the method.
Claims16
A method of retaining a sheet on at least one of a transfer cylinder and a guide surface of a sheet-guiding device in a sheet-processing machine by pneumatically activatable nozzles for producing an air cushion beneath the respective sheet, which comprises producing an air cushion by an air-pressure distribution resulting in air flows beneath the respective sheet, the air-pressure distribution being based virtually only on radially decelerated air flow, and being capable of retaining the respective sheet in position.
A device for retaining sheets on at least one of a transfer cylinder and a guide surface of a sheet-guiding device in a sheet-processing machine, comprising pneumatically activatable nozzles for producing an air cushion beneath the respective sheets, said nozzles having respective central blast-air openings as a center thereof, and an outflow feature selected from the group consisting of outflow openings arranged in a circle around said center and at least one outflow channel.
A device for retaining sheets on at least one of a transfer cylinder and a guide surface of a sheet-guiding device in a sheet-processing machine, comprising pneumatically activatable nozzles for producing an air cushion beneath the respective sheets, said nozzles constituting a swivel nozzle as a center, and an outflow feature selected from the group consisting of outflow openings arranged in a circle around said center and at least one outflow channel.
Dependencies are inferred from the claim text.