Abstract: A sheet decurler for smoothing sheets in a sheet-processing rotary printing press includes a suction chamber provided with a connection for connecting the suction chamber to a suction source, and a smoothing notch communicating with the chamber. The smoothing notch is disposed in such a way that sheets are drawable thereover. The suction chamber is constructed as a sound muffler or silencer.

Abstract: A delivery of a machine for processing flat printing materials, having a sheet guide surface over which the sheets are drawn during operation, with forcible guidance of an edge of the sheets extending in a processing direction, respectively, includes nozzles opening into the sheet guide surface and providing flow therethrough during operation, and a blown air curtain, formed during operation, which extends over the sheet guide surface transversely with respect to the processing direction and is aimed at a target region on the sheet guide surface. The nozzles are arranged on the sheet guide surface in accordance with a first mode and a second mode, the nozzles arranged in accordance with a first of the modes outputting during operation a flow which counteracts a volume flow, from the blown air curtain, which is deflected downline with respect to the processing direction.

Abstract: A guiding device of a machine for processing planar print carriers, the guiding device having a guide surface, over and beyond which sheets are drawn, during operation, simultaneously with positive guidance by a margin of the sheets, which, respectively, extends in a direction of sheet travel, and having nozzles terminating in the guide surface, for conducting therethrough, during operation, a flow of air for forming an air cushion between the guide surface and the respective sheet, comprising a region with a closed surface located on the guide surface, on the path of the print carrier along the guide surface, said region being disposed opposite a respective margin of a processable one of the print carriers of varying format, the margin extending laterally with respect to the direction of sheet travel.

Abstract: Provided in a sheet-fed printing machine is a sheet transport drum, including a first comb segment and a second comb segment, the second comb segment being mounted so as to be rotatable relative to the first comb segment for providing an adjustment to a format length corresponding with that of a printing-material sheet, the comb segments being formed of prongs having interspaces therebetween, and at least one covering provided for covering the interspaces between the prongs.

Abstract: A machine for processing sheets, in particular a sheet-fed rotary printing machine, includes a transporting cylinder for transporting the sheets and having air nozzles disposed offset in relation to one another in a direction other than an axis-parallel direction of the transporting cylinder, and having a directing configuration for directing the sheets and having air nozzles, the configuration being assigned to the transporting cylinder. The machine is distinguished in that the air nozzles include throttled air nozzles and unthrottled air nozzles.

Abstract: A guiding device in a machine for processing sheets of printing material includes unthrottled air nozzles for contact-free guidance of the sheets, and throttled air nozzles arranged at locations which are prone to contact by the sheets; and a machine for processing sheets of printing material and a sheet-fed rotary printing machine, respectively, having the guiding device.

Abstract: In a device for reducing the frictional force between a guiding or carrying element for sheets in a sheet-processing machine, in particular rotary printing machines, guiding and carrying elements acted upon by throttled blowing air include a sheet surface, orifices fluidically connected to a hollow interior, and a throttle disposed in the hollow interior. The elements are to be connected to an air source for blowing air out through the orifices and for generating an air cushion between a sheet and the sheet surface. Each of the orifices is preceded by the throttle with respect to a direction of air from the air source.

Abstract: A smoothing device includes guide surface sections for a flat printing material whose leading edge is pulled in a direction of travel over the guide surface sections. The guide surface sections have openings which communicate with throttling ducts that are pressurized with compressed air during operation. The guide surface sections form a smoothing notch and have air passage openings which communicate with a flow duct. The air passage openings are configured to cause pressure conditions when there is an air throughflow during operation such that the flat printing material forms a bead projecting into the smoothing notch.

Abstract: A sheet transport cylinder in a machine that processes sheets of printing material includes air nozzles for sheet formats of the printing-material sheets. The printing-material sheets are dimensioned from a minimum format up to a maximum format. The sheet transport cylinder is distinguished by the fact that the air nozzles are throttled air nozzles disposed to be matched to the minimum format.

Abstract: In a device for guiding sheets in a sheet-fed apparatus, preferably, a rotary printing press, sheet guide elements that are charged with blasted air are disposed at the sheet guide cylinder, and the air blast nozzles include a combination of conventional free jet nozzles and throttled nozzles, which are independently charged with different pressure levels.

Abstract: A delivery for a machine for processing flat printing materials, includes a sheet guide surface with suction openings opening into the sheet guide surface, a suction chamber communicating with the suction openings, and a sheet conveyor for gripping a respective sheet at an edge thereof extending in a sheet-conveying direction and for dragging the respective sheet over the sheet guide surface, the suction chamber being formed as a throttling duct; a machine for processing flat printing materials including the delivery; and a sheet-processing printing machine including the delivery.

Abstract: A device for reducing the noise emissions of a machine for printing flat material, wherein flat material is transportable across an impression cylinder, comprising at least one muffling element disposed across a portion of a transport path of the flat material extending along the impression cylinder, directly behind or downline from a nip, as viewed in the direction of the transport path, and at a spaced distance from the impression cylinder; and a machine including the device.

Abstract: A machine for processing planar print carriers having operationally rotating chains, and rails for guiding the chains, includes a damping covering arranged at least in sections along the rails and being clamped between two clamping surfaces, at least a first one of which is formed on the rails.

Abstract: A delivery of a machine for processing flat printing materials, having a sheet guide surface over which the sheets are drawn during operation, with forcible guidance of an edge of the sheets extending in a processing direction, respectively, includes nozzles opening into the sheet guide surface and providing flow therethrough during operation, and a blown air curtain, formed during operation, which extends over the sheet guide surface transversely with respect to the processing direction and is aimed at a target region on the sheet guide surface. The nozzles are arranged on the sheet guide surface in accordance with a first mode and a second mode, the nozzles arranged in accordance with a first of the modes outputting during operation a flow which counteracts a volume flow, from the blown air curtain, which is deflected downline with respect to the processing direction.

Abstract: A guiding device of a machine for processing planar print carriers, the guiding device having a guide surface, over and beyond which sheets are drawn, during operation, simultaneously with positive guidance by a margin of the sheets, which, respectively, extends in a direction of sheet travel, and having nozzles terminating in the guide surface, for conducting therethrough, during operation, a flow of air for forming an air cushion between the guide surface and the respective sheet, comprising a region with a closed surface located on the guide surface, on the path of the print carrier along the guide surface, said region being disposed opposite a respective margin of a processable one of the print carriers of varying format, the margin extending laterally with respect to the direction of sheet travel.