Abstract: An approach pipe system which delivers pulp suspension to the headbox of a paper machine includes a tank having in its interior an upper gas space and a lower liquid space adapted to contain a liquid the upper surface of which contacts the gas in the gas space. In its interior this tank carries a flexible diaphragm which defines with the tank a flow space separated from the liquid space by the flexible diaphragm. A supply pipe communicates with this flow space for delivering a pulp suspension thereto while a discharge pipe also communicates with the flow space for receiving a pulp suspension therefrom and for continuing the travel of the pulp suspension to a headbox. The gas in the gas space acts through the liquid in the liquid space on the diaphragm to damp pressure and flow rate disturbances in the pulp suspension flowing toward the headbox.

Abstract: A paper machine has a pair of endless wire loops respectively having elongated portions which travel together upwardly along a common path where the wire loops form a twin-wire former. This common path has a lower receiving end for receiving pulp stock from which a web is to be formed and an upper discharge end from which a web issues from the twin-wire former while being transported by one of the endless wire loops beyond the discharging end of the common path. A lower forming roll around which the endless wire loops are lapped determines the lower receiving end of the common path as well as an initial portion of the common path along which the wire loops travel together. An upper forming roll is also lapped by the endless wire loop and determines the discharge end of the common path as well as a final portion thereof.

Abstract: A strip-covered roll and the method for manufacturing the same, according to which the roll includes an inner roll body and a plurality of circumferential strip portions surrounding and engaging the inner roll body so as to cover the latter, these circumferential strip portions also engaging each other and being distributed axially along the inner roll body. Each circumferential strip portion has on one side a circumferential groove and on the other side an integral circumferential projection, and the projection of one circumferential strip portion is received in and fills the groove of the next circumferential strip portion, the groove having in its interior a greater transverse dimension than at the side surface of each circumferential strip portion which is formed with the groove, so that in this way the circumferential strip portions are locked to each other.

Abstract: A paper machine has a wire which transports a web to a detaching location where the web is to be detached from the wire and transported to a press section. A felt travels up to and beyond the detaching location to engage the web at the detaching location and receive the web from the wire while continuing to transport the web, while it adheres to the felt, to the press section. At the detaching location, by way of a structure which preferably is in the form of a suction box, a flow of air is created to travel first through the wire, then through the web, and then through the felt with this flow of air being highly localized so as to travel only through a relatively narrow rectangular area which extends transversely across the felt throughout the entire width thereof as well as the entire width of the web and wire.

Abstract: A roll and roll-driving assembly includes an internal stationary shaft and an outer shell surrounding the internal shaft as well as a bearing structure supporting the outer shell for rotation with respect to the internal shaft. A rotary input shaft is coaxial with the stationary shaft to receive a rotary drive from an outside source. A sun gear is fixed coaxially to the rotary input shaft so as to rotate therewith, while a plurality of planetary gears which respectively have axes parallel to the axis of the input shaft and which mesh with the sun gear are uniformly distributed about the axis of the input shaft. An internal ring gear surrounds and meshes with the planetary gears while being supported exclusively thereby so that the internal ring gear can automatically center itself with respect to the plurality of planetary gears while a load is uniformly distributed along a plurality of power-transmission paths extending from the sun gear through the plurality of planetary gears to the internal ring gear.

Abstract: A roll manufacturing method and roll, particularly for paper machines, wherein an inner roll body is surrounded by a strip having circumferential portions such as windings which engage and extend outwardly from an exterior surface of the inner roll body with the successive windings or circumferential strip portions engaging each other so that the engaging side surfaces of successive strip turns define an interface between themselves. The side surfaces of the strip are formed with registering grooves which thus define a bore extending across the interface, and an elongated interlocking member is situated in the latter bore so as to interlock the successive turns or circumferential strip portions against radial displacement outwardly away from the inner roll body. The interlocking member preferably has a fluid-tight sealing engagement with the groove surfaces which define the bore which receives the interlocking member, so that the interlocking member also forms a moisture barrier.

Abstract: A roll of the type which is used in a paper machine has an inner roll body covered with a plurality of strips. The strips include pairs of strip portions situated one next to the other along the roll body and covering the outer surface thereof. Each pair of strip portions extends through 360.degree. around the roll body with each pair of strip portions including one strip portion at least part of which circumferentially surrounds and overlaps at least part of the other of each pair of strip portions. This one of each pair of strip portions circumferentially presses radially inwardly against at least said part of the other of each pair of strip portions to press the other of each pair of strip portions against the outer surface of the roll body.

Abstract: A headbox system for a paper-manufacturing machine includes an equalizing chamber the interior of which receives pulp stock from any suitable source and delivers this pulp stock to an outlet end of the equalizing chamber. A plurality of elongated passages, situated in a horizontal plane, respectively have inlet ends which communicate with the outlet end of the equalizing chamber to receive a pulp stock therefrom, the stock flowing along the interiors of these passages toward a slice of the headbox. A throttling plate is situated between the outlet end of the equalizing chamber and the inlet ends of the passages for throttling the flow of pulp stock from the equalizing chamber into these passages.

Abstract: A roll drive for a machine of the type used in connection with the manufacture of paper. The roll which is to be driven has an end situated at a plane which is normal to the roll axis, and at the latter plane there is a supporting structure which supports the roll for rotation about its axis. Closely adjacent to this plane is a planetary gear transmission having an output and an input. The latter output is connected by way of a suitable transmission structure to the end of the roll for driving the latter with the output of the planetary gear transmission, while a rotary drive is connected to the input of the planetary gear transmission for driving the roll through the latter transmission and structure connected between the planetary gear transmission and the end of the roll.

Abstract: An off-the-road type of vehicle which is adapted to travel on the rough terrain has a pair of frames distributed longitudinally of the vehicle, these frames, for example, forming a cab frame which is adapted to accommodate an operator of the vehicle and a load-carrying frame. A pair of ground-engaging structures such as wheels are associated with the frames to support the latter for travelling movement. A suspension connects one of the ground-engaging structures with the frame associated therewith, and this suspension includes an elastically yieldable structure to provide the possibility of elastic yielding movement in this suspension. A joint structure interconnects the pair of frames so that they are turnable one with respect to the other at least about an axis which extends longitudinally of the vehicle in the direction of travel thereof and which is substantially horizontal when the vehicle is on substantially horizontal ground.

Abstract: During the manufacture of a paper product such as paper or cardboard, a moving web of sheet material which is to form the paper product is lapped over a roll while the relatively smooth, hard surface of a smoothing member is pressed against an outer surface region of the sheet material across the entire width thereof while an inner surface region thereof engages the roll, so as to impart in this way desired characteristics to the surface of the web engaged by the smoothing member, with a frictional rubbing action being provided between the web and the surface of the smoothing member. The above roll may be the roll of a press section, a drying section, or a calendering section of a paper machine, and a suitable support structure carries the smoothing member to maintain the latter in engagement with the moving web. The smoothing member may be fixed to the supporting structure or may take the form of a smoothing roller supported for rotary movement by the supporting structure.

Abstract: A press roll for treating sheet material such as paper and suitable for use in the calender or press section of a paper machine. The roll includes a robust stationary shaft and a shell coaxially surrounding and spaced from the shaft and rotatable with respect thereto. In the gap between the shaft and shell is a sealing structure which surrounds a pressure zone in this gap to seal off this pressure zone, fluid under pressure being supplied to the zone by way of a duct which extends through the shaft, so that the fluid pressure in the pressure zone can be controlled to control deflection of the roll at its shell.

Abstract: A method of manufacturing, for a paper machine or the like, a roll which has a grooved exterior surface. An elongated strip is wound onto the exterior cylindrical surface of an inner roll body, this strip being initially straight and being curved when wound onto the inner roll body so as to conform to the curvature of the exterior surface thereof while successive turns of the strip engage each other, this strip having an inner edge region engaging the exterior surface of the inner roll body and an outer edge region distant from the inner roll body and having a thickness less than the thickness of the remainder of the strip so that the turns of the strip define between themselves at the outer edge region of the strip an elongated helical groove. While the strip is wound onto the inner roll body, a longitudinal portion of the strip which is spaced outwardly from the exterior surface of the inner roll body is elongated for facilitating the curving of the strip as it is wound onto the inner roll body.

Abstract: A multicylinder dryer, particularly for the drying of a web, includes cylinders located alternately in two rows one above the other, guiding rolls situated between adjacent cylinders in both rows and drying fabrics wrapping the web on said cylinders, the cylinder which is the first in the direction of travel being a lead-on cylinder, the other cylinders being heated drying cylinders of equal diameters.

Abstract: A roll, of the type used in paper machines, is manufactured by rotating an inner roll body around its axis while simultaneously winding onto the outer surface of the inner roll body an elongated metal strip the convolutions of which press against each other so as to cover the outer surface of the inner roll body at the area of this outer surface onto which the strip is wound. This strip has an inner edge surface engaging the outer surface of the inner roll body, an outer edge surface distant therefrom, and opposed side surfaces extending between the inner and outer edge surfaces. At each of the wound convolutions of the strip the opposed side surfaces thereof respectively engage, over their entire areas, the adjoining side surfaces of adjoining strip convolutions over the entire areas of these adjoining side surfaces.

Abstract: A paper machine has an enclosure for containing a gas under pressure. A hydraulic headbox of the paper machine includes a slice as well as a conductor structure for conducting suspension to the slice and a distributor structure for distributing suspension as uniformly as possible to the conductor structure to be conducted thereby to the slice. The gas enclosure and distributor structure respectively have hollow interior portions communicating with each other so as to provide for the suspension in the distributor portion a free surface acted upon by gas under pressure in the enclosure so that this latter gas under pressure will act as a gas cushion for damping pressure variations in the stock suspension.

Abstract: A device for measuring the consistency of pulp stock flowing in a given direction along a conduit. The device includes a carrier shaft which extends transversely with respect to the direction of stock flow, and this carrier shaft carries a sensing element extending from the carrier shaft in the downstream direction of stock flow into the stock for shearing the flowing stock and for responding to engagement with the stock for producing a torque capable of being measured for indicating consistency of the stock.

Abstract: A rotary assembly which has an inner shaft and an outer hollow cylinder coaxially surrounding and freely rotatable with respect to the inner shaft. A drive shaft is coaxial with the inner shaft and is freely rotatable with respect thereto, this drive shaft carrying an inner gear which rotates with the drive shaft. An intermediate gear meshes with the inner gear, and this intermediate gear is mounted directly on the inner shaft for free rotation with respect thereto. A circumferential gear transmission which is coaxial with the inner shaft and the outer cylinder meshes with the intermediate gear and is operatively connected with the cylinder to transmit rotation thereto from the intermediate gear which is driven by way of the inner gear from the rotary drive shaft.

Abstract: A deflection-compensated roll of the type which is adapted to be used in the calender or press section of a paper machine. The roll has an inner non-rotating axle and an outer shell surrounding and rotatable with respect to the axle, this axle and shell having a common axis. The axle includes an inner magnet structure while the shell includes an outer magnet structure which rotates together with the shell. These inner and outer magnet structures cooperate to provide attraction between the shell and axle on one side of the above axis and repulsion between the shell and axle on the opposite side of the above axis, to achieve in this way a deflection-compensation.

Abstract: A pickup and press section of a paper machine includes a suction pickup roll and felt which transfers a web from a wire, a first suction press roll and felt cooperating with the suction pickup roll and felt to define therewith a first press nip to which the web is transferred. A second suction press roll and a lower press roll situated therebeneath as well as a felt which cooperates with the latter lower press roll define a second press nip to which the web travels subsequent to the first press nip, the felt for the latter lower roll of the second press nip and for the first suction press roll being constituted by a single felt common to both of the latter rolls and supporting the web while it travels from the first to the second press nip.