Abstract: In a double-belt press for the manufacture of wood chip boards and the like having a width less than the nominal working width of the double-belt press, the forming belts are held in contact with the support structure so as to ensure heat transfer in the edge portion of the pressing zone extending beyond the edge of the filling which produces the boards to the region near the edge of the pressing zone. In this edge portion, an edge filling composed of unbonded particles is compressed on a compressible rotating belt.

Abstract: A hydraulically supported roll includes a stationary crosshead extending through a rotatable hollow roll, which is heated at its inner and outer circumferences. A thermostatic control and regulating device is provided to keep the temperatures at the inner circumference and the outer circumference of the hollow roll at the same level during the heatin-up and/or cooling-down phase.

Abstract: A hydrostatically supported roll includes a stationary crosshead, which extends through a rotatable hollow cylinder to form a surrounding clearance space therewith. Annular sealing elements are radially movable in bores provided in the crosshead to sealingly abut the inner circumference of the hollow cylinder. The sealing elements are arranged in diametrically opposing pairs, i.e., they are offset by 180.degree. in the circumferential direction of the roll at the same longitudinal position along the roll. The entire clearance space surrounding the sealing elements is filled with hydraulic fluid at a predetermined pressure, except for the areas in which the sealing elements are present.

Abstract: An apparatus for applying a treatment fluid, such as dye, onto an advancing web of material has a run-off surface sloping down toward the web that extends above and over the width of the web. The dye flows onto the web from the lower edge of the run-off surface. The dye is applied onto an upper zone of the run-off surface from individual nozzles, which are a constituent part of nozzle combs that are pivotable about a transverse axis between a first position disposed above the run-off surface and a second position over a run-off gutter.

Abstract: An apparatus for applying a treatment fluid on a web of material includes a run-off surface extending transversely over a web to be treated. The run-off surface slopes down obliquely onto the web and has an upper portion upon which treatment fluid applied thereto flows down over the run-off surface onto the web via the lower edge thereof. A flow homogenizing baffle is provided on the run-off surface. The baffle is formed from closely spaced deflection elements that even out any irregularities that exist in the fluid film flowing over the upper portion of the run-off surface.

Abstract: In a roll apparatus formed by a top roll and a hydraulically supported bottom roll, which together form a roll nip, additional piston/cylinder units that can lift the hollow cylinder near its working position closing the roll nip are provided at least at the ends of the hydraulically supported bottom roll. Due to the geometric arrangement employed, this lifting function is operative only up to a predetermined position of the hollow cylinder relative to its crosshead, which is selected to be at a short distance before closure of the roll nip. The pressure in the piston/cylinder unit degenerates whenever the piston of the additional piston/cylinder unit is forced out of sealing contact with its respective cylinder when the predetermined position is reached.

Abstract: A process for producing a smooth and glossy surface on a paper web and a calender arrangement for carrying out the process are disclosed. The calender arrangement comprises two sets of rolls through which the paper web is conducted in succession. Each set of rolls comprises a highly heated hard roll and a soft roll. A cooling device arranged upstream of at least one of the nips formed between the roll sets restricts the amount of heat transfer to the inner layers of the paper web and the attendant, undesirable partial plasticization of the inner layers of the web.

Abstract: A temperature measuring arrangement for a revolving roll which includes a contactless temperature sensor by means of which the temperature of an annular peripheral zone of the roll situated outside the operating zone of the roll is measured contactlessly. Upon detection of a deviation from a given temperature or given time response of the temperature, a contact temperature sensor which is active only briefly is, by means of a control unit, brought into abutment, using a movement drive, at a point inside the operating zone of the roll.

Abstract: A jig for the application of treatment liquor on a web of material comprises a reservoir tank formed to receive the total quantity of liquor required for application during at least one treatment pass of the web and an applicator system arranged inside the jig for proportioning the application of liquor onto the web, with the reservoir tank supplying the applicator system with treatment liquor.

Abstract: A flexure-controllable roll includes a stationary crosshead extending through a hollow cylinder, which is rotatable about the crosshead and supported by hydrostatic supporting elements that are radially displaceable by at least one piston/cylinder unit associated with each supporting element. Hydraulic fluid flows from the cylinder chamber of each piston/cylinder unit via choke bores into supply pockets formed in the contact surface of each supporting element. An additional piston/cylinder unit is provided on the rear side of the supporting element for exerting additional forces directed either toward the supporting element to press it against the inner circumference of the hollow cylinder or away from the supporting element to pull it away from the inner circumference.

Abstract: A continuous process for treating a web of material by the wet-in-wet application of two serially arranged treatment baths includes the steps of: applying a first treatment bath to the web; squeezing off excess moisture from the web to a specified moisture content; applying a second treatment bath to the web while it is still wet from the first treatment bath such that the web is in contact with a quantity of the second bath that is no greater than that quantity that can be continually absorbed by the web; replenishing the second treatment bath; and reducing the moisture content of the web to a specified moisture content immediately after application of the second treatment bath.

Abstract: In a hydraulically supported roll including a rotatable hollow cylinder and a stationary crosshead, transverse end seals are provided to seal a longitudinal chamber formed in the clearance space between the crosshead and the hollow cylinder. Each transverse end seal includes a roller bearing having a first bearing ring rotatable with the hollow cylinder and a second bearing ring mounted on the crosshead. The first bearing ring includes a first surface, which along with a second surface formed on a ring secured to the crosshead, defines a clearance gap. The gap has a width of less than 0.1 mm. The first bearing ring seals the longitudinal chamber at the inner circumference of the hollow cylinder and the first and second gap defining surfaces are located on parts that are axially restrained with respect to the crosshead.

Abstract: A roll arrangement comprises a hydraulically supported bottom roller having rotating hollow cylinder and a stationary crosshead extending lengthwise through the cylinder to form a clearance space therewith. The end of the crosshead are supported by force exerting devices. The forces producing the line pressure of the roll are transferred through a hydraulic supporting device, such as hydraulic fluid contained within a longitudinal pressure chamber in the crosshead, to the inner circumference of the hollow cylinder. When a quick release action is desired to separate the bottom roller from its counterroll, the pressure in the longitudinal chamber is suddenly lowered by opening a quick release valve connected to a return tank. A corresponding reduction of the pressure in the force exerting devices to permit separation of the rollers occurs only after a sensor, such as a dynamometer, has determined that the load on the crosshead has been substantially removed.

Abstract: In a roll having a hollow roll through which a stationary cross piece extends, a bearing housing is provided for a bearing which engages an axial extension of the hollow roll. The extension has a smaller outer diameter than the outer diameter of the hollow roll. The bearing is located in the bearing housing between the outside circumference of the extension and the inside circumference of the bearing housing. The bearing housing has lubricant feed and discharge passages separate from means for hydraulically supporting the hollow roll. The bearing housing has a bore which fits over the end of the cross piece without play thereby forming a support distance.

Abstract: A calender arrangement including a first stack of rolls with a first heated hard roll, which, together with a center soft roll, forms a nip. On the other side of the soft roll, another soft roll is arranged, which, together with the soft roll, forms another nip. A second stack of rolls with a soft roll which interacts with a second hard heated roll follows the first stack of rolls. The second hard heated roll contacts the paper web on the side lying opposite the side contacted by the first heated hard roll in the first stack. A further hard roll can also cooperate with the hard roll in the second stack to form a hard nip. The treatment that the paper web undergoes, varies in accordance with the type and sequence of the nips through which it is guided.

Abstract: A hydrostatically supported roll has several hydrostatic support elements supporting the inner circumference of a rotating hollow roll. The hydrostatic elements are supported on the stationary crosshead that extends through the rotating roll to form a clearance space therewith. Each hydrostatic element has support pockets supplied with a first pressurized fluid via choke canals and branch lines connected to a flow-controlled pump delivering a constant volume of first pressurized liquid, regardless of the counterpressure in the support pockets. The first pressurized liquid fed to the support pockets is temperature-controlled. The support pockets are separated from essentially closed pressure chambers, which are supplied with a second pressure-controlled pressurized liquid from separate feedlines for pressing the hydrostatic elements against the inner circumference of the hollow roll to support same. The second pressurized liquid is not communicated to the inner circumference of the hollow roll.

Abstract: In a fabric treatment apparatus for applying a washing or rinsing liquid to a dyed or printed textile web, the web is transported by a sieve conveyor belt along a horizontal path. Spaced from one another along that horizontal path are several liquid applicators or spray pipes. Associated with each spray pipe is a respect dwell stretch and a suction device, the dwell stretch being located downstream of the respective liquid applicator and upstream of the respective suction device. The dwell stretch includes either two sets of rotatable rollers spaced a distance from one another or a rotatable sieve drum.

Abstract: A sealing arrangement for a roll having a stationary crosshead extending through a rotating hollow roll, which forms an outer working roll circumference, includes longitudinal seals and transverse end seals disposed against the inside circumference of the hollow roll. The seals form at least one longitudinal chamber in the annular clearance space between the crosshead and hollow roll. The longitudinal chamber may be filled with pressure liquid for supporting the hollow roll. Each transverse end seal has a relief chamber formed by a recess in the side of the transverse end seal facing away from the longitudinal chamber and a shoulder of a circumferential slot in the crosshead in which the transverse end seal is disposed. A pressure chamber is formed between the bottom of the circumferential slot and the bottom side of the transverse end seal. Both chambers are in fluid communication with the longitudinal chamber.

Abstract: A jig has two winding rolls in two troughs which surround the winding rolls concentrically and contain treatment liquor, and a squeezing device for a web of material passing from the one to the other winding roll arranged between the winding rolls. The squeezing device is arranged high enough that the web of material runs from the squeezing device downward toward both sides. A partition extends upward between the troughs up to the squeezing device.

Abstract: A jig for the application of treatment liquor on a web of material comprises a reservoir tank formed to receive the total quantity of liquor required for application during at least one treatment pass of the web and an applicator system arranged inside the jig for proportioning the application of liquor onto the web, with the reservoir tank supplying the applicator system with treatment liquor.