Abstract: In a flying splice roll changer a splice tail occurs at the splice joint that may induce problems in a downstream processing station. The present invention is directed to shortening of the splice tail (2) by directing the paper web (1) around a deflection roller (3) so that the splice tail (2) is located on the outer face of the roller and extends radially under the action of centrifugal force while being optionally supported by air ejected from blowing nozzles (8, 9). The splice tail is then cut with a blade (7) located in the vicinity of the outer surface of the deflection roller (3) so that only an insignificant length of a few millimeters remains.

Abstract: An apparatus applies a coating composition consisting of a resin and fine abrasive particles like corundum particles, to a paper web by feeding the composition to the paper web as it loops around a guide roller to a metering roller juxtaposed with the guide roller. The coating composition, which may develop stripes, is then equalized with a structured roller engaging the paper-web pass leaving the guide roller and formed with at least one thread-like structuring element which may be followed by or preceded by a doctor blade arrangement or a smooth-surfaced roller.

Abstract: The invention relates to a device for applying a coating substance to a continuous paper web in a process for producing abrasion-resistant laminates for manufacturing decorative paper. The coating substance consists of a viscous mixture of melamine resin and alphacellulose to which particles of corundum are added, and is applied to the visible surface of the paper. The inventive device includes a deflector roll (2) on which the paper web (1) lies in an area in which it loops around; a metering roll (6) which is arranged parallel to the deflector roll (2) and forms the boundary of a gap with the same, and which is driven synchronously or almost synchronously with the deflector roll; a slit nozzle (7) for applying the coating substance either directly to the paper web (1) on the deflector roll (2) or to the metering roll (6); and a doctor blade of a rectangular piece (9) of flexible rubber type material.

Abstract: An apparatus for drying, cooling, winding up and transverse cooling of a paper web. A lopping device is provided downstream of a conveyor segment lifting the web over the winder or sheet cutter, whichever is proximal to the cooler, the paper web then reaching a bifurcation from then which it may be directed to engagement with the mandrel in a winding readiness position of the coiler or to a conveyor segment for the transverse cutter.

Abstract: A system for treating a porous web with a liquid treatment liquid continuously moves the web along a path sequentially through a saturating station, steaming station, and drying station. A drum in the saturating station engages a back face of the web and a trough closely surrounds the drum and confronts a front face of the web. Seals form between the drum and trough a generally closed and pressurizable chamber through which the web passes and which is supplied with the treatment liquid at superatmospheric pressure so as to force the liquid against only the front face of the web. In the steaming station jets of steam are directed against the back face of the web to heat the web and disperse the treatment liquid throughout the web. The web is heated and dried in the drying station.

Abstract: A paper web impregnated with a liquid resin and following impregnation is coated with an abrasive particle containing coating mass or composition and then dried before a liquid resin is applied which does not contain the abrasive particles. The web is then finally dried and the resulting paper is particularly suitable as a cover sheet in the hot pressing of laminates since it minimizes wear of the laminate press.

Abstract: An air-cushion nozzle for an air-treatment device has a hollow housing having an upper wall formed by a pair of end plates and a central plate. The end plates form with the central plate a pair of generally parallel slots directed upwardly generally toward each other and one of the end plates is formed adjacent and along a full length of the respective slot with an array of throughgoing holes. The central plate is substantially imperforate between the slots. The housing is internally pressurized, normally with hot air, to form from each slot an upwardly directed elongated jet of air and from each of the holes a respective upwardly directed further jet of air.

Abstract: A suspension dryer for freshly moisturized webs of swellable paper has a row of lower nozzle beams which extend transversely to a throughgoing direction so as to be spaced from one another along a dryer length with a distance from one another and provided at an upper side with blowing openings, a row of upper nozzle beams extending transversely to the throughgoing direction at a distance from one another along the dryer length so as to be offset relative to the lower nozzle beams and provided on a lower side with blowing openings, a width of the nozzle beams arranged in an initial portion of the dryer length is greater than a width of the nozzle beams arranged in the remaining portion of the dryer length, and a distance between two adjacent ones of the nozzle beams arranged in the initial portion is greater than a distance between two adjacent ones of the nozzle beams arranged in the remaining portion.

Abstract: In known pressure impregnating devices there is a chamber, which continuously narrows in the transport direction, between a cylinder around which the web to be impregnated loops, and the inner wall of a trough containing the impregnating agent. The impregnating agent is supplied to the chamber under high pressure, which is further increased in the chamber by dynamic effects. Sealing problems arise at the inlet and outlet slits as well as at the front faces because of the high pressure. Disruptions in the operation can be created by fluff coming loose from the paper web as well as by impregnating agent penetrating between the sliding faces. The new device is intended to remedy these disadvantages, and is provided with the seals have alternating narrow gaps and wide grooves in the form of a labyrinth seal. The grooves are have drain openings for the impregnating agent flowing through.

Abstract: A device for stream feeding of sheet onto a stack including first and second conveyors spaced apart along a conveying path of the sheets, a deflector mounted between the conveyors and a braking system reducing a transport speed of the sheets and providing loading the sheets onto a stack.

Abstract: During thermal treatment of continuously moving metal bands more heat is supplied over a part of a treatment path to edge regions of the band per surface unit than to the center region of the band. This prevents formation of a wavy shape in the edge regions of the metal band which is advantageous for a further treatment.

Abstract: A drying apparatus for continuous product webs which contain solvents becoming volatile during drying, the drying apparatus has a dryer having means for transporting a treatment medium, an inlet slot and an outlet slot, and nozzle boxes provided at both sides of the inlet slot and the outlet slot, a cooling tunnel directly connected with the dryer, a combustion chamber for thermal combustion of a solvent which becomes volatile during drying, a first heat exchanger and a second heat exchanger, each having a primary side and a secondary side, a fireplace, a waste gas channel extending from the dryer through the secondary side of the first heat exchanger to an inlet of the combustion chamber and then from an outlet of the combustion chamber through the primary side of the first heat exchanger and the primary side of the second heat exchanger to the fireplace, a suction tube extending from the cooling tunnel, a conduit connected with the nozzle boxes through the secondary side of the second heat exchanger provide

Abstract: The invention relates to a sheet delivery system for rotary cross cutters which has a stacking place and a suction brake table preceding the stacking place. Disposed preceding the suction brake table are drawing rollers which run at at least the conveying speed of the sheets arriving from the rotary cutter and which are disposed spaced out from one another on a driven shaft and between which deflecting rollers of smaller diameter are mounted for driven suction belts guided over the suction brake table. Provided in the gaps between the drawing rollers are blowing nozzles whose blowing direction is directed over the suction brake table.

Abstract: The invention relates to an apparatus for the heat treatment and/or the drying of a web of material 1 passing continuously through. In this case the web of material 1 is treated on one or both sides with infrared radiation. The infrared radiators 6, 7 can be adjusted in their radiation capacity over the width of the web of material 1 by being heated by a plurality of individual hot-gas streams which are guided parallel to the web of material 1, can be adjusted to differing temperatures or can sweep at differing flow rates over the rear sides of radiating plates 6a, 7a of the infrared radiators 6, 7.

Abstract: The present invention relates to a web tension control device provided at a vertical drier for cloth webs, in which the cloth web is guided by means of conveyor means located in front of the lower cloth web inlet and after the lower cloth web outlet and by means of guide rollers provided in driven motion in the upper area of the drier. In order to detect without error the tension of the upward running cloth web, guide rollers 16, 17 are provided together with their common drive 18 on a rocker member 30 located outside the drier. The rocker member axis 30 is located immediately adjacent to the second guide roller 17 in running direction, while rocker member 30 is supported at the other end on a pressure cell 34 emitting a signal for the tension of the upward running cloth web.

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: 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.