Abstract: A system to achieve an improved winding structure while winding webs (1, 1', 1" . . . ), especially paper webs, to obtain at least one wound web roll (5, 5', 5" . . . ) on a winding machine, comprises sensors 8A, 9A for determining torque load 8 and rider roll nip load 9, respectively, in order to change the tension remaining in the wound web. The winding machine is of a supporting drum type with at least two supporting drums (2, 3), at least one of these supporting drums preferably has elastic flexible surface (2', 3'). The torque and nip loads 8, 9, respectively, for changing the tension remaining in the wound web roll operate such that the tension of the web (1, 1', 1" . . . ) first decreases at increasing web roll diameter of said at least one web roll (5, 5', 5" . . .) during an initial winding phase, then stays approximately at the same level and, after winding further, decreases further at increasing wound web roll diameter during a final winding phase.

Abstract: A separating device for winding devices for material webs, particularly of paper or the like, which are longitudinally divided into several partial webs, with at least two rolls (1, 2) being essentially parallel to each other and flexed, or bowed, essentially in the same direction, with a stand (10) for the pivotable arrangement of the rolls about a common swivelling axis, with a support frame (9) for the rotatable mounting arrangement of the rolls about their respective axis of rotation and for the horizontal sweep of the rolls with respect to the stand (10) about the common swivelling axis, whereby at least one transmission pair (3, 5, 8; 8, 6, 4) for the simultaneous, automatic angular movement of the deflection line of the flexed rolls during the turning about a horizontal axis of the support frame with respect to the stand is provided in such a way, that the transmissions, or angular movement of the deflection lines, all the two rolls (1, 2) are necessarily operated by the turning movement.

Abstract: Radially spaced calibration holes are drilled parallel to the exterior surface of a cylindrical shell for a dryer roll. An ultrasonic transducer is mounted in a fixture filled with a coupling medium which allows for adjustment of the spacing and angle of the transducer which traverses the shell as it is rotated. The transducer produces a signal directed to the shell. A computer calculates the time the signal takes to travel from and return to the transducer and the depth of the shell from which the signal returns. A clear signal corresponding to holes up to one inch from the surface are found by adjusting the ultrasonic transmission angle. This angle is approximately 23 degrees from a normal to the casting surface. The calibrated transducer traverses the surface of the shell. The signals are gathered and stored to create data which may be used in maintaining the shell for the dryer roll.

Abstract: A drying section apparatus is disclosed for drying a web of paper. The apparatus includes a size press for applying size to at least one side of the web. A single tier dryer is disposed downstream relative to the size press for drying the web. The single tier dryer includes a plurality of dryer cylinders and a plurality of vacuum rolls. Each of the vacuum rolls is disposed between adjacent dryer cylinders of the plurality of dryer cylinders. A dryer felt extends around at least one of the dryer cylinders. The arrangement is such that at least one of the dryer cylinders is top felted for permitting downward removal of broke. An air cap is disposed above at least one of the dryer cylinders for blowing air through the felt for drying the web disposed between the dryer cylinder and the felt. The arrangement is such that both sides of the web are dried during passage of the web through the single tier dryer.

Abstract: A controlled deflection roll has a roll shell which is hydrostatically radially supported by internally disposed hydrostatic shoes. In order to axially position the roll shell, a mechanical locating link is provided which is disposed externally of the roll shell. The link is coupled at one end to an element attached to the roll shell, and is coupled at an opposite end to a fixed support, such as a floor stand. The end of the roll at which the locating link is disposed is thus axially fixed, while the opposite end of the roll remains free to float. The locating link can be connected to an oscillator to oscillate the roll shell axially during operation so as to distribute any non-uniformities in the roll shell and thus to mitigate their effect on the sheet.

Abstract: A flexible blade is used as a metering device by being inserted at a nip formed between a radiused profile portion of a fixed, rigid loading element and a substrate roll. The flexible blade is forced to take the shape of the profile portion at the nip, and thereby meter the coating to a desired thickness and consistency. Inflatable air tubes engage the loading element to adjust the overall thickness of the coating.

Abstract: A loose joint assembly for linking two segments of a shaft which are substantially aligned at either end of the joint assembly co-axially about a axis of rotation. The joint assembly includes a male coupling member disposed co-axially within a female coupling member with an intermediate bearing member to align the coupling members. The male coupling member has a plurality of circumferentially spaced flats located within the space enclosed by the female coupling member. A corresponding plurality of openings, preferably in the form of slots extending in the circumferential direction, are located in the female coupling member, each slot being aligned with a corresponding flat. A drive pin is attached to the male coupling member at each flat and extends radially from the flat and at least partially into the corresponding slot in the female coupling member.

Abstract: A cleaning apparatus is disclosed for cleaning a forming wire of a paper machine. The apparatus includes a shower which is disposed adjacent to the forming wire for applying a shower of cleaning fluid to the wire. A blow box is disposed closely adjacent to the forming wire and downstream relative to the shower. The box is connected to a source of pressurized air for blowing a jet of air through the wire for removing the cleaning fluid therefrom. A plate is disposed between the box and the wire. The plate defines a plurality of slots which are disposed obliquely to a direction of movement of the wire in order to supply a multiplicity of pressure pulses to the wire for removing contaminants therefrom.

Abstract: A lapping assembly is described wherein a lapping process is performed to provide a flat headbox apron floor. The lapping assembly includes an eight-legged fly-style plate and a spring loaded floating driver. The lapping assembly and operation consists of attaching a spring loaded floating driver to a machine spindle of a milling machine. A lapping fly wheel is attached to the spring loaded floating driver. A coated abrasive strip with desired grit size to achieve the desired finished results is clamped in place on the lapping fly wheel. The machine spindle is rotated, thereby rotating the spring loaded floating driver and the lapping fly wheel, and the grinding and lapping of the apron floor can begin.

Abstract: A cleaning apparatus is disclosed for cleaning and removing contaminants from a forming wire of a paper machine. The apparatus includes a shower which is disposed adjacent to the wire for supplying a cleaning fluid onto one side of the forming wire. A leading blade is disposed downstream relative to the shower. The leading blade contacts the wire on the one side of the wire and extends in a cross-machine direction across the wire. A trailing blade is disposed downstream relative to the leading blade. The arrangement being such that the leading blade and the trailing blade defined therebetween a cross-machine directional slot. The slot is connected to a source of pressurized air so that the pressurized air flows through the slot and through the wire for removing the cleaning fluid and the contaminants from the wire. Furthermore, the trailing blade and the wire define therebetween a wedge shaped gap which converges in a direction from the slot and away from the leading blade.

Abstract: A blanket passes over a concave shoe which is urged against a backing roll to form a press nip. The ends of the blanket are attached to circular heads. The transition from the nip-imposed cardioid shaped to the circular shape maintained by the heads results in a region of the blanket subject to fatigue. The heads are mounted on journals for motion between inboard stops and outboard stops which are spaced apart approximately 4 inches in the cross machine direction. Positioning of the heads on the journals is controlled by four hydraulic pistons mounted between the support beam and each head. Multiple hydraulic systems are controlled to extend the life of the blanket by alternating between holding the back head fixed and letting the front head float and fixing the front head and letting the back head float.

Abstract: An extended nip press having a concave shoe which is supported on a hydraulic actuator which urges the shoe against a backing roll. A pair of opposed profile control hydraulic actuators apply a pure couple about the load support line formed by a bearing pin which transmits the support load from the hydraulic actuator to the shoe. A leading hydraulic actuator is positioned in front of the load support line and pulls down on the shoe. A trailing hydraulic actuator is positioned behind the load support line and pushes up on the shoe. The leading hydraulic actuator and trailing hydraulic actuator are equally spaced from the load support line and have equal hydraulic actuator area and are connected to the same hydraulic reservoir. Thus the hydraulic actuators exactly balance each other out except for the couple or torque which they apply about the load support line.

Abstract: A web support foil positioned adjacent to a Yankee dryer above a creping doctor. The foil supports the web as it leaves the dryer. Mounted to the top of the foil is an adjustable air deflector which is positioned tangent to the Yankee dryer. The air deflector blocks air moving along the web. A slotted opening draws air from a leading-edge pocket collecting fibers which are broken loose during the creping action. The web is held against the bottom side of the foil by one or more air jets which are directed over the bottom surface on the foil. The jets of air function as coanda air jets and prevent the web from sticking to the bottom surface of the foil while creating a Bernoulli effect which holds the web against the bottom of the foil.

Abstract: A ventilator apparatus is disclosed for supplying air from a source of pressurized air between a dryer and a web supported by a felt extending around a roll of a single tier drying section. The apparatus includes a housing which is connected to the source of pressurized air. The housing defines a nozzle for directing a flow therethrough of a current of air. The flow is directed from the nozzle towards a diverging nip defined between the dryer and the web supported by the felt when the felt diverges away from the dryer prior to the felt extending around the roll. The arrangement is such that the flow of air compensates for an underpressure generated by the felt when diverging away from the dryer so that fluttering of the web is inhibited.

Abstract: A method and apparatus for controlling the tension and position of a web roll being wound from a continuous traveling web, including a pair of winding drums supporting the winding roll in a pocket, positioning a pair of rider rolls with a looped belt span therebetween above the pocket on a beam and first pressing downwardly on the winding roll with a first rider roll, thereafter with the tensioned belt spanning the rider roll and the web roll, and thereafter with the belt and both rider rolls, while controlling the tension in the belt.

Abstract: A method and apparatus for coating a traveling paper web includes a coating applicator disposed in movably-controlled spaced adjacency with the paper web, which is supported on a rotating backing roll. The coating applicator permits a controlled introduction of a fresh portion of an aqueous slurry of coating material which is mixed with a recirculated portion of coating material in a controlled manner to prevent the formation of large vortices within the coating applicator. The coating material flows successively through mixing, convergent, and recirculation channels, all of which are defined on one side thereof by a distinct surface of a flow stabilizer which is positioned centrally in a cavity in the coating apparatus.

Abstract: A hydrostatic self-loading controlled deflection roll has a central, hydraulically operated shoe which extends substantially the entire cross-machine width of the rotating roll shell, and two outboard shoes disposed, in the cross-machine direction, outside of the nip loading zone. The use of the outboard shoes permits the use of a single, full-length nip shoe within the nip loading zone, which simplifies control and provides for more uniform temperature distribution. The outboard shoes also provide better crown control. The outboard shoes are preferably disposed within a head flange area of the roll, at the location where spherical bearings would normally be present in a conventional roll. A bearing ring is disposed axially outside of the head flange and around a portion of a bearing box at either end of the roll for rotatably supporting the roll shell about bearings in the bearing box.

Abstract: A winding machine for winding webs, such as paper webs which may be longitudinally slit, has two support rollers (TW1 and TW2) that carry the roll being produced (R; R'; R", R"') in a winding bed formed between the support rollers. Both support rollers have elastic casings (M1 and M2) which are however deformable to a different extent. One of the support rollers is partially surrounded by the web during winding. In order to further optimize the winding quality, even in the case of heavy wound web rolls, the support roller (M1) subjected to the highest total load, that results both from static and dynamic loads during winding, has the most elastically deformable casing. Such a winding machine is preferably developed so that the space (DR) delimited by both support rollers (TW1 and TW2) and the already partially produced wound web roll (R) is sealed as much as possible at its ends and from below. An overpressure can be generated in the space (DR) for relieving the inherent weight of the roll (R).

Abstract: An applicator head is positioned beneath a backing roll and has a housing divided into three sections. A first coating pond is defined between an overflow barrier and a first wall. A converging plate extends between the first wall and a second wall, and converges toward the substrate, and a second pond is defined between the plate and an end wall. Coating is introduced to both ponds. A low pressure cavity is defined beneath the converging plate and between the first wall and the second wall. The cavity opens to the second pond, and draws air and excess coating from the second pond. The substrate is prewetted as it passes through the first pond, and coating deprived of entrained air is applied to the substrate in the second pond. Coat weight uniformity and increased machine speeds are thus achievable.

Abstract: An applicator head is positioned beneath a backing roll over which a substrate can be drawn. The applicator head has a housing which contains a pond of coating material between an up machine overflow lip and a down machine extraction plate or premetering plate. Coating material at a relatively low velocity flows into the pond adjacent to the overflow lip. The premetering plate extends radially from the coating inlet to a position proximate to and converging with the backing roll, where it premeters the amount of coating applied to the substrate. The premetering plate preferably has a plurality of holes through which coating and air are drawn. A metering element is spaced downstream of the premetering plate, and a low pressure area is constructed therebetween. Air and coating are drawn from the low pressure area through a valve, and the pressure thereby controlled.