Abstract: An arrangement for the coating of a running cardboard, paper or the like web (1) by coating paste, whereby an excess amount of the supplied paste is removed and the supplied coating layer is levelled by means of a scraper knife (6) separately arranged after the coating position in the running direction of the web (1). The scraper knife (6) is arranged upstream, inclined relative to the running web (1) so, that the web (1) meets the knife (6) in an angle, which exceeds 90.degree., preferably considerably exceeds 90.degree..

Abstract: The invention refers to a method and a device for varying the application amount of a coating agent at the blade coating of a moving material web (24,40,51), preferably a paper web, by corresponding control of the engagement pressure of the coating blade (20,43,50,68) against the web (24,40,51) which exhibits a coating agent surplus. The web is supported by a support, preferably a rotating support roller (25,41), and the blade is along one of its longitudinal sides clamped in a blade holder (21,44,49,69), moreover the blade is initially, with a certain force and thereby in an obtained arcuate shape, brought, with the opposite longitudinal side thereof, into engagement with the web, in a certain given angle between blade tip and web, and with a thereby defined engagement area.

Abstract: At the outflow-side end of a pre-dosing device, which comprises an applicator chamber formed at the product web in the region where the latter is guided by a counter-cylinder, a rolling doctor rod, wire wrapped or provided with circumferential grooves, is provided as a pre-dosing element, whereby high excess amounts of coating compound can be applied on the product web.

Abstract: A short-dwell coater comprises of a backing roll (1) used for guiding a paper web (1), with an upper lip (28) and a lower lip (28) forming a nozzle apparatus. This nozzle apparatus can apply the coating mix on the paper web while the web is backed by the surface of the backing roll. A doctoring member with which the excess mix applied with the nozzle apparatus can be doctored is also provided as well as a mounting fixture, to which the doctoring member is mounted, and a support structure, with which the fixture is supported. In the short-dwell further comprises an actuator, to which the nozzle apparatus is attached so that the apparatus is movable in relation to the doctoring member in order to adjust the dwell length between the doctoring member and the nozzle apparatus.

Abstract: A coater for applying liquid coating material onto a paper web carried across an upstream dip roll applicator that applies an excess layer of coating onto the surface of the web, is cahracterized by an improved downstream doctor assembly for metering and leveling the coating of the web. The doctor assembly includes a doctor blade having a top extended agianst and across the web, and a shear plate just upstream of the blade. The shear plate has a surface facing toward but spaced from the web and a ramp on the surface extending toward the web. As the coating layer on the web contacts the doctor blade, excess coating removed from the web by the blade bounces back off of the blade, flows across the shear plate surface and is deflected by the ramp against the web to rewet the excess coating layer on the web before it reaches the blade.

Abstract: A rough dosing point with applicator roll 2 is provided which relative to the opposed roll 1 forms a rough dosing gap 6. Located some distance from the rough dosing device is a finish dosing device which comprises a blade element 5 and an opposed roll 4. The web runs through a reversing roll 9 between the rough dosing gap 6 and the point of finish dosing, the distances of the web departure point from the opposed roll 1, of the rough dosing gap 6, and the run-on point of the web on the opposed roll 4 of the finish dosing point given through the blade element 5 being relatively short. The reversing roll having a maximum diameter of 300 mm, and the arcuate course of the web curving at said reversing roll at an angle of reversal between 25.degree. and 60.degree..

Abstract: A glue applicator for a labeling machine has the customary glue roller rotating about a vertical axis. A scraper blade is held adjacent the periphery of the roller to remove excess glue from the roller so that a label to which glue is transferred from the roller will not receive a coating of more than desirable thickness. Relatively small blade inserts provide the sharpened edges for scraping the excess glue from the roller. A support member is mounted to a carrier that swings about an axis parallel to the axis of the roller. The blade insert is clamped against the support member by means of a clamping member whose clamping force is developed by bolts that pass through the clamping member and are threaded into the support member. Eccentric elements are provided for adjusting the support member and, hence, the blade insert carried thereon to achieve a uniform and accurate gap between the scraping edge of the blade insert and the periphery of the roller.

Abstract: An improved doctor blade, for use at a downstream end of a pressurized coating material application zone of a paper coater, has a tip portion of a limited length and first thickness and a major body portion of a second and increased thickness. The increased thickness of the major body portion enables the doctor blade to resist flexure caused by variations in pressure of the coating material in the zone, so that the blade tip more uniformly meters and levels coating on a paper web. Also contemplated is an arrangement for clamping the blade at the downstream end of the application zone, in a manner to minimize flexure of the blade in response to variations in pressure of the coating material in the zone.

Abstract: A trailing blade paper coating apparatus is disclosed which comprises means providing a resilient curved surface for supporting a moving web of cellulosic material, an applicator for a paper coating composition and a trailing blade which in use is biased towards and in contact with the moving web of cellulosic material, and which further includes a flexible blade mounted so that, in operation of the trailing blade paper coating apparatus, the flexible blade is in contact with a web of cellulosic material to be coated at a location which is upstream relative to the trailing blade and downstream relative to the applicator for the coating composition. A method is also disclosed and claimed.

Abstract: A system for two-sided coating of a running paper web. The device comprises an application device for spreading the coating material over both sides of the web running through a first nip formed by a rotating counter roll and a levelling member.According to the invention, the device includes an auxiliary roll, which is, in the direction of progress of the web, fitted at a certain distance from the first nip and which, together with the counter roll, forms a second nip for the web which has followed along with the said roll over the distance. The diameter of the auxiliary roll is substantially smaller than the diameter of the counter roll, and the face of the auxiliary roll is substantially harder than that of the counter roll. By means of the invention, the risk of damaging the coating at the side of the web facing the roll can be reduced by the web being detached from the second nip formed between the rolls.

Abstract: An apparatus for coating a vertically travelling web comprises a vertical coating chamber defined by the web, a pair of side walls, a back wall spaced from the web, and a flexible blade applied against the web and forming a top closure of the coating chamber. There is a back-up member at the opposite side of the web forming a coating nip together with the flexible blade, through which nip the web passes. A slot at the bottom of the coating chamber forms a web entrance of the coating chamber. The width of the slot and the supply of coating substance to the coating chamber are so adapted to the speed of the web and to the viscosity of the coating substance, that only a small amount of coating substance flows downwardly through the slot during normal operation of the apparatus. The side walls of the coating chamber provide means for substantially closing the coating chamber.

Abstract: A finger-type doctor blade holder has a plurality of pressure fingers spaced along the underside of a loading plate. A doctor blade is removably supported in recesses defined between the pressure fingers and the loading plate, and the pressure fingers are mounted for pivotal movement about an axis extending across the surface to be doctored. A flexible loading tube is located alongside the finger pivot axis in a tube tray, and a force transmitting member is interposed between the pressure fingers and the loading tube. The rigidity of the force transmitting member prevents upward bulging of the loading tube between the pressure fingers, and the surface of the loading tube is indented by either the force transmitting member or a separate member at the base of the tube tray. The indentation in the tube surface enables the tube to act as a rolling diaphragm when compensating for variations in the distance between the pressure fingers and the base of the tube tray.

Abstract: A device for coating continuous webs with regulable coating strength by means of a doctor rod that rests against the coated side of the web, that is mounted in a doctor bed, and that can be elastically forced with regulable pressure against the web being coated. The doctor rod is a doctor batten that moves with little friction along at least one overflow-side slide face of a rigid doctor bed. The face of the doctor batten toward the web that is being coated is rectangular and demarcates in conjunction with the web a narrowing coating-material application gap with a geometry that depends on the degree of contact pressure. The upper edge of the face constitutes a straight and sharp stripping edge. The face and stripping edge of the doctor batten are flexible. Its face is highly resistant to wear. The contact pressure is exerted by an inflatable means of exerting pressure positioned between the batten and the bed.

Abstract: The disclosure concerns a coating device for coating a web which travels over a counter-roller. Upstream of a doctor blade for spreading the coating composition is a coating composition application chamber that includes a resilient tongue e.g. a leaf spring, which extends downstream toward the doctor blade and defines a hydrodynamic pressure slot between the tongue and the web. A pressure space for the coating composition is defined between the downstream end of the tongue and the doctor blade. The tongue is oriented to gradually narrow the height of the hydrodynamic pressure slot between the tongue and the web, and the tongue is resilient or resilently supported for this purpose. An additional retention wall helps close off the pressure space. The pressure space helps avoid air inclusions in the coating composition and creates a quiescent zone upstream of the doctor blade enabling uniform application of the coating.

Abstract: An apparatus for scraping off excess coating composition from a traveling web of paper has a doctor, in the form of a flexible blade used as is or with a metering rod thereon. The doctor is fastened to a doctor supporting beam and can be pressed against the web of a paper by means of a supporting ledge which is fastened to the doctor supporting beam. The doctor supporting beam is swingably mounted at each of its two ends in a respective intermediate pivoting lever. Each intermediate lever is, in turn, pivotably mounted to a supporting bar. The pivoting axis of the intermediate levers lies as close as possible to the line of attack of the doctor on the web of paper. However, the pivoting axis of the doctor supporting beam is displaced from the pivoting axis of the intermediate levers. The end of the intermediate lever remote from its pivoting axis is connected by a pair of lift mechanisms to the doctor supporting beam.

Abstract: A method of producing coated printing paper by the use of a blade coater. A flexible blade is pressed against a paper web carried by a backing roll, by a support member disposed on the opposite side of the blade so that the blade is bent to a specific curve. The bent blade serves to remove the excess coating applied to the paper web, with improved results. The dwell time that the coating is in contact with the paper before the excess is removed by the blade is kept to a very short period.

Abstract: An apparatus and method for applying a smooth uniform coating to a web (W) having variations in thickness and density and surface irregularities is disclosed. The invention includes a vertical floating pressure table (B) which supports the traveling web (W) against a transfer roll (20) and a scrape blade (46). Coating material (C) metered by a doctor blade (34) is applied to the transfer roll (20) at (40) and then applied to the web in a uniform layer (78). The pressure table (B) is supported against the web by a counter-balancing linkage arrangement (D) which maintains a constant uniform pressure on the table (B) and web (W) regardless of the vertical movements of a table platform (60) in response to web variations an irregularities. A smooth uniform coating (80) is provided.

Abstract: Apparatus for supporting a coater blade as used in paper forming. The apparatus comprising a blade support, clamping means for locating the blade against the blade support, and a profile support engaging the coater blade. The profile support is an elongate plate-like member which is clamped adjacent one edge and whose other edge engages the coater blade. Adjustment means is provided to adjust the position of engagement of the profile support with the blade in a direction tangential to the plane of the coater blade. The adjustment being provided by a row of screws whose heads co-operate with the profile support and which engage threadingly with a mounting means for the profile support. Spring means acts in opposition to the screws.

Abstract: A device for unilaterally clamping an elastic doctor blade into a cutting beam. The tension of the blade is varied in relation to a web of material that is to be coated and that runs over a mating roll. The doctor blade rests against the web of material along a doctor line parallel to the cutting beam. The blade is rigidly supported in its midsection along a line of support that is in fixed position with respect to the web of material parallel to the doctor line. The lower edge of the doctor blade can be displaced with respect to the plane of the doctor line and the line of support. The doctor blade is positioned in a longitudinal recess in the cutting beam. The doctor blade is clamped into the longitudinal recess against an elastic resistance in the cutting beam by means of an elastic pressure-medium hose. The lower edge of the doctor blade is guided toward the line of support when displaced out of the plane of the doctor line and the line of support.

Abstract: In a coating method, a web is run along a stationary metering member having a curved smooth surface at the upper end in such a manner that the web is in contact with the smooth surface, a solution which is substantially the same in composition as a coating solution is continuously supplied to the web at a position which is before the metering member, to wet the coating surface of said web, and a predetermined quantity of coating solution is supplied continuously to the web at a position which is after the metering member.

Abstract: A method and apparatus are provided for metering of coating on a moving web of material, such as linerboard, paperboard, paper, film, foil or the like, in which the web is fed between a support and a skirt of flexible plastic sheet material extending across the full width of the web and having a free end portion extending contiguous and parallel to and in the direction of movement of the web, and a pressurized tube in contact with the free end portion of the skirt cooperates with the skirt and the web to create a constant pressure web coating region between the web and the free end portion of the skirt within which the coating thickness is skimmed down to provide a layer of coating on the web of substantially uniform thickness.

Abstract: A device for the regulation of the wet application weight of coated webs, the web being supported on its uncoated side by a roll. The device has a stationary, inherently rigid wiping device with a concavely curved long entrance flank so that between web surface and wiping device a sickle-shaped entrance gap is formed. The radius of curvature of the entrance flank of the wiping device is equal to or only slightly greater or smaller than that of the support roll. In order to avoid wear and tear at the edge of the wiping device additional wear elements are provided at the wiping device.

Abstract: An assembly for wiping a surface of a continuously moving strip, such as a metal strip, includes a holder, a housing that is slid into and from the holder having an elongated channel extending across the pathway of the strip and facing the strip, an elongated bladder retained within the channel, a wiper blade removably attached to the strip for contacting and wiping the strip and means to inflate the bladder to determine the pressure of the wiper blade against the strip.

Abstract: A web coating method and apparatus includes a web scraping mechanism arranged after a coating section, the scraper being in the form of a wire bar. The scraping efficacy of the device is improved by forming the wire bar from small gauge wire wound upon a circular or polygonal rod, where the radius of curvature of the wire is 2 mm or less. If desired, the wire bar may be rotated relative to the web as scraping is effected.

Abstract: Reinforced facings, including reinforcing webs entrained in hydraulic cement via a slurry bath, adhere to a nailable lightweight aggregate cementitious core to form a panel web. The reinforced web is formed on abutting conveyed carrier sheets, and the web is transversely cut, between the sheets, while moving or when stopped, in response to sensing of the sheets. The cut panels, on respective sheets are stacked for curing without damaging the panel edges and in a manner to minimize panel flex. Slurry bath, facing applicators, and cutter and stacking apparatus are included.

Abstract: Coating apparatus includes three coating rollers, in a closed group, forming two coating nips with each other. First coating supply apparatus is provided on the first coating roller, followed by knife or doctor coating apparatus. Second coating supply apparatus is provided on the second roller after the first nip, followed by knife or doctor coating apparatus. After the second roller, the paper web runs through a second nip formed by the second roller and a third coating roller. The coated web is released from the third coating roller and transferred to drying apparatus, for example. If necessary, heating apparatus is provided at the first and second coating rollers for drying the web and the coating agents by heat radiation without contact with the web.

Abstract: This disclosure is concerned with enabling the use of multiple liquid adhesive nozzles principally to provide continuous uniform adhesive layers, particularly in relatively small items such as cigarette filter tips or the like, wherein a critically oriented adhesive shear surface adjacent the nozzles causes the plurality of adhesive beads simultaneously deposited by the nozzles to merge into a full, continuous, uniform coating, and with additional control features provided to control the degree of merger from separate adjacent beads to uniform merged coating.

Abstract: Heat activated, fabric conditioning products are made by impregnating a thick, absorbent substrate with fabric-conditioner chemicals. Such products are designed for use at elevated temperatures encountered in laundry dryers. This invention provides an improved process for making such products and an apparatus for applying liquids to the substrate. Previously a doctor blade was used in combination with a roller to limit the volume of liquid being applied to the substrate during compression of the substrate in a nip. The present invention concerns a thin wire drawn under tension which can function as the doctor to obtain a smooth thin film of liquid on the lower roller of the nip used for applying the liquid to the substrate.

Abstract: A wide traveling web is coated on one side thereof by passing the web through a pool of non-Newtonian coating liquid. The pool is replenished by a conduit manifold having at least one inlet port and a plurality of outlet ports. The outlet ports communicate directly with the pool. The inlet port and the outlet ports are interconnected by a plurality of branching conduits. All branching conduits subject the coating liquid to substantially identical flow rheology in that the branching conduits are of substantially equal length and substantially equal fluid shear characteristic.

Abstract: This disclosure is concerned with enabling the use of multiple liquid adhesive nozzles principally to provide continuous uniform adhesive layers, particularly in relatively small items such as cigarette filter tips or the like, wherein a critically oriented adhesive shear surface adjacent the nozzles causes the plurality of adhesive beads simultaneously deposited by the nozzles to merge into a full, continuous, uniform coating, and with additional control features provided to control the degree of merger from separate adjacent beads to uniform merged coating.

Abstract: Apparatus for coating paper webs having a doctor blade held in a clamping device which is mounted in a moveable holder. The clamping device is mounted to be pivotable about an axis parallel to the pivot axis of the holder and at a distance from the end of the doctor blade which is greater than the distance from the end of the clamping device.

Abstract: A method and apparatus for treating textile cord on a continuous basis where the cord is sequentially treated by application of aqueous solution passed through a squeeze roll station, passed through a pull roll station and then to a drying operation. The applied liquid is additionally removed from the cord by specially positioned and designed elastomeric squeeges located in the squeeze roll area and the pull roll area.

Abstract: Two side coaters and methods of coating paper on both sides are disclosed in which a web of paper to be coated is moved in a generally upward direction in partially wrapped relation to a coating roll, so that one side of the web is in contact with and supported by the roll. This one side of the web is coated by a first coating material which is applied by the coating roll. This coating material is applied to the coating roll by an applicator roll, either directly in which a puddle is formed between the applicator roll and the coating roll, or through transfer from a pair of metering rolls in which the coating puddle is formed between the metering rolls.

Abstract: Method and apparatus for coating a moving web and for independently controlling the coating's width, thickness and uniformity of thickness along the length of the web. A back-up roller supports the moving web on a portion of the roller's periphery. A stationary and pliant smoothing film is positioned adjacent the exposed surface of the web which is supported by the back-up roller. A coating liquid is metered to the confluence of the web and the smoothing film, the metering rate being selected to produce a desired coating width. A pliant pressure generating means, in the form of a membrane or a force web, holds a length of the smoothing film against the moving web with a static force whose magnitude is selected in accordance with a desired coating thickness. The relative position of the back-up roller and the pressure generating means determines the length of coincidence of the moving web, the coating liquid, and stationary smoothing film.

Abstract: The invention comprises an extrusion head for coating or adhesive application. The head is particularly well adapted for application of high viscosity hot melt adhesives in the manufacture of corrugated board. It comprises the combination of a body having a slit or series of orifices with a thin, flexible downstream spreader element. The spreader element contacts the coating receiving surface at a low acute angle to level the coating material but does not serve as a doctor to control coating thickness.When used as the adhesive applicator at the single facer of a container board corrugating machine, excellent pin adhesion values were obtained at adhesive usages as low as 6 g/m.sup.2.

Abstract: An extruder having a vertically disposed feed screw depositing a hot melt adhesive as an extrudate laterally across a carrier member. A blade with a back-up roller regulates the flow onto the moving carrier member which along with the film formed thereon is cooled and thence selectively either rolled up with the carrier member into a roll or separated therefrom and rolled up onto itself as a supply roll of adhesive.

Abstract: A coating apparatus for coating a moving web is disclosed. A scraper element is provided, transverse to the direction of travel of the web, for scraping excess coating material therefrom. The scraper element has three positions: a rest position, in which it is relatively distant from the web; a ready position, in which it is maintained a short distance from the surface of the web, preferably about 1 mm; and an operating position, in which it is pressed against the web. A positioning member includes a first subsystem for moving the scraper element from the rest position to the ready position and a second subsystem for moving the scraper element from the ready position to the operating position. The second subsystem preferably contains a pneumatic pressure element, and the first includes either a pneumatic or a hydraulic pressure element. The two subsystems are connected to each other in series.

Abstract: Magnetic recording media in which, following application of the magnetic dispersion to a web of tape base material, the magnetic particles are oriented in a preferred direction and the magnetic dispersion is dried to fix the magnetic particles in their oriented position. To assist the orienting action of the orientation magnet, a blanket is located between the latter and the coating device, which blanket is caused to make sliding contact with the applied magnetic layer.

Abstract: This invention relates to a method and apparatus for continuously coating a sheet article.The sheet article 21 is continuously driven and passes, upwardly along a vertical portion of its travel path, between two flexible blades 38 mounted on an holder 34 in such a manner that their feet are spaced from the sheet article 21.A coating composition 42 is injected into the corner 41 formed between the element 21 and the blade.The planer shape of the end zone of the blade applied against the sheet article in a parallel direction may be carried out by a pneumatic tube 40, as shown, or by other means such as flexible counterblades.The invention may be used, among others, in the coating of paper or paperboard.

Abstract: Method and apparatus for coating both sides of a moving web and for independently controlling the coatings' width, thickness and uniformity of thickness along the length of the web. A moving web is supported on a backing surface. Two stationary and pliant smoothing films are positioned one adjacent each surface of the web, including the web surface which is supported by the backing surface. A coating liquid is metered to each side of the web at the confluence of the web and the two smoothing films, the respective metering rates being selected to produce a desired respective coating width. A pliant pressure generating means, in the form of a membrane holds a length of one smoothing film against the moving web with a static force whose magnitude is selected in accordance with a desired coating thickness. The relative position of the backing surface and the pressure generating means determines the length of coincidence of the moving web, coating liquid, stationary smoothing films and pressure generating means.

Abstract: An apparatus and process are disclosed for scraping excess coating substance from a running web by moving the web past a scraper blade that is oriented transversely to the running direction of the web. The blade is pressed against the web with a variable force. A motor automatically moves the blade to maintain the angle between the scraping surface thereof and the web approximately constant when the force varies, preferably by rotating the blade about an axis which is located near the scraping surface, is transverse to the running direction of the web and extends generally parallel to the blade direction of extension across the web. The amount of movement of the blade that is necessary to maintain the angle constant is preferably determined by monitoring either the thickness of the coating on the web or the degree to which the force on the blade deforms the blade from an undeformed shape. The automatic system can preferably be disabled to permit the blade angle to be set at a selected value manually.

Abstract: A method and apparatus are disclosed for use with a paper coater located on a backing roll of, for example, a papermaking machine. In the method, apparatus in the form of a hinged bridge is used to collect excess coating liquid from a remote doctor blade or a first coater having such blade and supply the same to a second coater. The bridge may be mounted to the doctor blade or the first coater so that it can be placed in a bridging position accommodating various angles of the doctor blade, or in a second stored position wherein it will not interfere with the operation of either coater or the doctor blade.

Abstract: The disclosure concerns both an apparatus and a method for adjusting the applied weight of a coating composition on a web traveling over a support roll. The support roll is opposed by a scraper that removes excess coating composition which was just previously applied to the web. The scraper has an entrance flank that is opposed to the support roll. The downstream end of the entrance flank is defined by a sharp edged end. The length of the pressing zone between the scraper and the support roll is adjusted by swiveling the scraper around its axis with respect to the support roll so as to adjust the position of the sharp edged end of the scraper with respect to the coated surface of the web. The surface of the support roll is elastic so that it can be depressed under the pressure applied thereto by the sharp edged end of the entrance flank. The scraper may be developed as a sector of a roll having the axis of the scraper as the axis of the curve.

Abstract: Disclosed is an applicator for the application of liquid to webs and methods of using it. A web-guide path is defined through the applicator and has an intermediate enlargement. One or more inlets and one or more outlets are provided at the exterior of the applicator and at the enlargement respectively, which are part of a closed passageway system for the supply of liquid to the enlargement. A slit-like passageway system affords passage of web to the enlargement. An exit passageway with one outlet affords passage of web, to which liquid has been applied, from the enlargement out of the applicator. Means are provided for changing characteristics of the exit passageway whereby selectively to influence the application of liquid to the web. By using such an applicator in which provision is made for changing the size or shape, or both, of the exit passageway, considerable control may be exercised over both the degree of impregnation of the liquid into the web and the thickness of liquid coating on the web.

Abstract: In coating a strip of material, such as web of paper, it is passed over a support member forming one of the enclosing surfaces of a closed chamber. The closed chamber is arranged to operate under vacuum conditions. Coating liquid is supplied in excess to the closed chamber to form a layer on the surface of the strip. At the end of the coating action, as the strip leaves the closed chamber, it is contacted by a movably positionable blade which provides a wiping-off action on the strip so as to remove the excess of coating liquid from the strip. The vacuum inside the closed chamber urges the blade against the strip. Therefore, it is possible, by varying the vacuum, to vary the amount of coating liquid adhering to the strip leaving the closed chamber.

Abstract: A doctor blade holder is described that is adapted to accommodate a doctor blade in a slot in the holder and is provided with a resilient means at the base of the slot such that a blade accommodated within the slot is able to move into and out of the slot in response to variations in pressure against the doctoring edge of the doctor blade.

Abstract: A laminating device for the application of coating to sheet material includes a doctor blade and a bearing surface between which the material to be coated is passed. The bearing surface has a convex curvature whereby the area of the contact zone between the sheet material and bearing surface is minimized. Means is also provided for horizontal and vertical adjustment of the bearing surface.

Abstract: A device for continuous application of coating of constant thickness to a web employing an elastic coating knife fixed in a clamping jaw and having a free edge parallel with a fixing line, the knife being prestressed against the web which is running over a roll, the knife center area being supported along a backup line, the clamping jaw being pivotable about the abutting line of the knife on the roll and about a line outside the fixing line in which the abutting and backup lines are fixed relative to the roll and the fixing line is continuously movable relative to the roll.

Abstract: A moving, fibrous web is impregnated with a liquid by placing the liquid on the surface of the web, spreading the liquid over the web surface, pressuring a portion of the liquid into the web to partially saturate the web with the liquid and leave residual liquid on the web, and metering the residual liquid into a layer of substantially uniform thickness. This layer is then forced into the web to saturate it with liquid. This method is particularly effective for producing plastic pipe incorporating at least one layer of fibrous material saturated with liquid resin .Apparatus for practicing this method comprises a first surface transverse to the surface of the web, and a second surface converging with the web in the direction of travel of the web. The first surface performs the spreading step and the second surface performs the pressuring and metering steps.

Abstract: Two side coaters and methods of coating paper on both sides are disclosed in which a web of paper to be coated is moved in a generally upward direction in partially wrapped relation to a coating roll, so that one side of the web is in contact with and supported by the roll. This one side of the web is coated by a first coating material which is applied by the coating roll. This coating material is applied to the coating roll by an applicator roll, either directly in which a puddle is formed between the applicator roll and the coating roll, or through transfer from a pair of metering rolls in which the coating puddle is formed between the metering rolls.