Abstract: The invention relates to a method and apparatus for the floatable guiding of material in the form of sheets or webs. The material in the form of sheets or webs (1a, 1b, 1c) is guided over floating nozzles disposed on one side and operating on the air cushion principle. Suction shafts are disposed between the individual floating nozzles, so that during conveying the material is alternately subjected to excess pressure and negative pressure forces, being guided as a result free from back-up and flapping in a required conveying plane. The invention is more particularly suited for guiding material over convexly and/or concavely curved conveying paths such as are usual, for example, for the dragging conveyance of printed sheets between the outlet of a printing machine and the delivery.

Abstract: Apparatus for overlapping and depositing sheets cut by a crosscutter from a web of material, including a conveying device disposed immediately downstream from the crosscutter in a conveying direction of the sheets for conveying the sheets at a conveying speed along a conveying path and for further guidance thereof to floating strips extending over a sheet-pile stacking location, a combined conveying and braking device disposed immediately upstream of the stacking location and including a camshaft disposed above the conveying path of the sheets, the camshaft carrying conveying and braking cams and being rotatable in synchronism with the crosscutter, slide elements and brake elements disposed one after the other along a circle of rotation of the cams below the sheet conveying path and at a distance from one another corresponding to the length of the cams, a device for rotating the cams at the sheet conveying speed, a device for rotating the brake elements at a braking speed, the cams having a constant radius an

Abstract: An apparatus changes a sheet stack 11, formed on a conveying element, in a sheet deliverer with continuous sheet supply. To divide the stack into a lower composite stack to be conveyed away and an upper smaller component stack, two pushers 17, 20 are provided, of which the first pusher 20 is an edge pusher having a cutting edge 22 which is directed at a perpendicular front edge 23 of the stack 11 and from which an air jet is delivered which lifts the stack corner, forming a gap for the introduction of the edge pusher 20. During the further advance of the edge pusher, the smaller stack is separated over its whole width from the rest of the stack, so that the second pusher 17, constructed as a surface pusher, can be inserted perpendicularly to the direction of advance of the edge pusher 20.

Abstract: A device for floatably guiding webs or sheets of material to be conveyed by means of nozzles supplying blown air comprises a nozzle body having at least one nozzle aperture on which a jet of blowing air emerges, and a deflecting surface disposed countersunk in the nozzle body and inclined towards the outside of the nozzle body. The deflecting surface is part of the generated surface of a conical depression in the nozzle body, and a nozzle aperture is disposed eccentrically in the conical depression so that the direction of the blowing air jet is directed towards the deflecting surface at a blowing angle which is from less than 90.degree. to parallel with the deflecting surface.

Abstract: The invention relates to an apparatus for the depositing of sheets at a stacking location. The apparatus has an overhead suspension arrangement 15 which is fed with blasted air and extends some way over the stacking location 2, 3. This overhead suspension arrangement 15 has an undulating profile, extending in conveying direction, which imposes on the conveyed sheet to be deposited an undulation improving its dimensional rigidity, so that it can no longer buckle or turn on striking the stop. To reduce the conveying speed of the sheets, the stacking location is preceded by an overlapping station 9, 10, which initiates the braking operation a great distance ahead of the stacking location 2, 3 and keeps the sheet at braked speed almost until the striking of the sheet against the stop 6 without the overlapping being hindered by this.

Abstract: The invention relates to an apparatus for the floatable guiding of webs of material by air blown against the web. The apparatus comprises blowing boxes 2-6 disposed offset in relation to one another above and below the web 1 of material. Each blowing box 2-6 has two opposite rows of blowing apertures 21 whose blowing direction encloses an acute angle a2 with a deflecting surface 25, 26 which adjoins the edge of the blowing aperture 21 remote from the web 1 of material. The deflecting surface 25 also encloses an acute angle a3 with the web 1 of material. The two acute angles a2, a3 are so selected that the air blown out of the blowing apertures 21 is guided away the deflecting surfaces 25 and against the web 1 of material, where it spreads out in the form of a source flow 30. In this way both a strong air cushion supporting the web 1 of the material is obtained and also a high heat transfer at the web 1 of material and a clearly-defined flow of the blown air from the air cushion.

Abstract: The invention relates to a dryer, in particular offset dryer for material webs containing high-boiling solvents to be dried in a continuous flow. The heating-up of the dryer atmosphere with a burner takes place in a closed chamber arranged in the dryer casing. Circulating air is fed to the burner as combustion air. Further circulating air, containing solvent vapors, is mixed in with the flue gas of the burner in the chamber in order that the solvent is completely burned. The temperature-controlled hot gases of the after-burning are cooled by mixing in fresh air at the inlet slit and, if appropriate, outlet slit to such a low temperature before they pass into the dryer interior that cracking of the volatile solvents in the circulating air of the dryer cannot occur. The volatile solvents, which can be used as fuel, can be extracted from the exhaust air, which like the circulating air only contains volatile solvents as pollutants, by cooling.

Abstract: The invention relates to an apparatus for the contactless guidance of webs of material 1. The apparatus has at least two blow nozzles 2, 3, designed as slits or rows of holes, arranged one behind the other in running direction of the web of material 1 and extending transversely to it. The blow jets of these blow nozzles 2, 3 are directed in the same direction and obliquely against the web of meterial 1. On the side towards the web of material 1, flow baffles 12, 12a, 12b, 13 are provided, of which the flow baffle 12 adjoining the rear blow nozzle 2 in running direction of the web of material 1 is curved convexly toward the web of material 1. The flow baffle 12a, 12b between the convexly curved flow baffle 12 and the front blow nozzle 3 is designed as a shock diffuser. With such an apparatus, a web of material 1 is guided free from fluttering even under difficult circumstances.

Abstract: The invention relates to a device for floatably guiding webs of material by means of a gaseous or liquid medium. The device comprises one or more elongate flow elements having a surface which is arched more particularly convexly to the web of material which are disposed in succession in the direction of travel of the web and transversely thereof, and nozzles so disposed in rows at a distance from such surface that the free jets emerging from the nozzles blow on the surface of the flow member at a shallow approach flow angle and are converted on the surface into wall jets, before they blow on the web of material, more particularly by reversal of flow.

Abstract: This invention relates to a device for floatably guiding webs of material by means of gaseous or liquid medium. The device comprises at least one elongate flow member having a surface convexly curved on the top side proximate the web, and nozzles which are disposed in rows along longitudinal edges and via which the gaseous or liquid medium can be introduced in jets between the flow member and the web of material. The nozzles associated with one longitudinal edge of the device are offset in pitch in relationship with the other longitudinal edge and are so disposed that opposing diverging flow jets, flow past one another without mutual impedance. The apparatus operates on both the supporting airfoil and air cushion principles, with a smooth transition from one principle to another.

Abstract: There is disclosed a method of crosscutting a web and stacking the resultant sheets which comprises continuously feeding said web toward a cutter, decelerating the feed of said web at the cutting point for the duration of the cutting operation, while continuing the feed toward said cutter at the same rate whereby a back-up occurs in the feed direction, cutting said web, causing the new head end of the web so formed upon said cutting to overlap the tail end of the resultant cut sheet on the conveying path, conveying said sheet to a sheet stack, after said cut sheet is moved onward to said sheet stack at normal conveying speed increasing the conveying speed of the web toward said cutter until the web portion which has backed up ahead of the cutting point has been stretched taut and caused to overlap the tail end of the cut sheet.

Abstract: A dryer for a continuously traveling web is formed by an enclosure through which the web travels, and which is formed by upper and lower chambers which are vertically separable. At least one chamber has a series of jet boxes which pneumatically hold the web against deflection. A manifold for the boxes on the side of the series facing away from the web is laterally spaced from a side wall of the chamber. A blower is horizontally offset from the manifold and is positioned between the manifold and the side wall and a conduit interconnects the blower and manifold. The offset position of the blower relative to the manifold causes the two components to overlap each other, permitting them to have adequate vertical dimensions while reducing the height they would otherwise require.

Abstract: For threading a web through a float web dryer which pneumatically floats the web when traveling through the dryer, a transverse bar mounted by chains and having needles for engaging the web, picks up the start of the web and carries it through the dryer.

Abstract: A jet box is constructed with a guide surface adjoining the slit type jet which includes a substantially plane region and a bent region which defines a bend of 30.degree. to 60.degree. with the plane region. In addition, a plurality of jet holes are disposed along the bend for ejecting additional propelling medium therefrom. The jet box may be provided with a slit-type jet formed of a plurality of laterally disposed orifices. In this case, an additional row of jet holes are provided in staggered relation to the jet holes in the bend between the plane and bent regions of the guide surface.

Abstract: A continuous uncoiler for coils of web lengths adhesively connects the web of an exhausting coil on and overlapping the front web of a new supply coil and a rip cord behind the adhesive is pulled to rip off the residual portion of the overlapping web behind the adhesive.

Abstract: A freshly printed continuously traveling paper web leaves a heated print drying zone hot with its printing dry enough to avoid smudging but retaining a residual amount of the printing ink's solvent oil which continues to vaporize, forming a boundary layer of vaporizing oil traveling with the web. For cooling, the web wraps partially around one or more cooling rolls where condensation can cause the vapor boundary layer to condense on the exposed cold roll surface to a liquid phase, exerting a solvent action more or less resoftening the otherwise adequately dried printing with consequent smudging on the roll surface. To prevent this, the boundary layer is pneumatically removed from either this exposed surface of the roll not contacted by the web, or from the web itself, preventing resoftening of the printing by what would otherwise be liquid solvent oil.

Abstract: A sheet piler for sheets transported end-to-end at high velocity, has a reciprocating suction bar for reducing the sheets' traveling velocity so that their forward travel can be stopped without damaging the sheets, with the stopped sheets forming a pile. Rotating brushes press the sheets' trailing ends momentarily against the suction bar and the latter then reduces the sheets' travel velocity.

Abstract: Device for removing a stack of sheets of paper from a place of deposit to which the sheets are conveyed by a conveyor including a platform and a carrier unit. The conveyor can be lowered in relation to the plane in which the sheets are conveyed as the height of the stack increases for receiving the stack. The carrier unit can be inserted above the platform in the area of the place of deposit and on which the sheets conveyed further to the place of deposit are stacked while the platform loaded with the stack is exchanged for an empty platform. The carrier unit is composed of two plates which are arranged directly one above the other and which are capable of being inserted independently of one another into the upper area of the stack.

Abstract: A blow box for suspended guidance and/or conveyance of strip material or sheets in which the blow means is blown with the effect of a blow jet issuing from a slot nozzle at an incline against the strips or sheets to be guided and/or conveyed. The blow box includes a barrier wall provided with blast openings which are arranged therein facing the strips or sheets so as to be close to one another in a row and have blowing directions which are substantially the same or which slightly diverge towards the ends of the blow box. Each blast opening is formed by a tongue positioned in the barrier wall, the tip of the tongue being sunk into the blow box, and an inclined guide surface which is arranged with its edges around the tongue and which is sunk into the blow box, together with the edges of the guide surface which overlap into the barrier wall.

Abstract: An air cushion nozzle for a device for conveying a web in suspension on an air cushion comprising a housing with two opposed walls having bent legs at the ends thereof resting on respective baffle plate portions supported on the housing. The legs have spaced semi-circular recesses therein forming tongues between the recesses which are in contact with the baffle plate portions to form two rows of discharge outlets for jets of air at the recesses extending toward one another in parallel to form the air cushion. The baffle plate portions can be joined together by a perforate plate. The baffle plate means can be bent at different angles to produce different angles of inclination for the jets of air produced at the two rows of discharge outlets.