Abstract: In an arrangement for the application of substances to a web of material (4), whereby a doctor blade (9, 13) is magnetically pressed against the material or a stencil (5) by means of a working magnet, and rests against a profiled ledge (6) in its operational position, it is proposed that in the profiled ledge (6) at least one restraining magnet (7) be provided, which keeps the doctor blade (9, 13) in rolling or sliding contact with the profiled ledge when the working magnet is switched off and raises it from the application surface (4, 5) or stencil.

Abstract: Paint or the like coating is applied to a gap between an elongated strip article and an extended surface, such as a coating head. A variable load, such as provided by air cylinders, is continuously exerted on the extended surface during operation for urging the extended surface against the applied layer on the strip, so as to maintain a uniform metering gap between the extended surface and the coated strip surface. The extended surface has a sensor for repetitively determining metering gap. A computer monitors the sensor output and causes load-exerting air cylinders to vary their applied load, in order to urge the coating head toward or away from the back-up roll, so as to reduce difference between the sensed metering gap and a predetermined gap, thus producing a uniform coating film thickness on strip articles having non-uniform surface topography.

Abstract: A system for applying one or more coats to the top and/or bottom of strips of backing and for manufacturing strip without any strips of backing. The system is has a water-cooled belt (17), at least one separate coater (9, 22, 23, and 35) for the upper and lower surfaces, separate sprinklers (12 and 25) for sprinkling the coated upper and lower surfaces of the strips of backing, featuring suction devices (13 and 26) for suctioning up any dust from the water-cooled belt and at least one additional coater (42) and water-cooled roller (67) is provided for coating strips of backing or for manufacturing a strip without the strips of backing.

Abstract: An apparatus and method for fabricating integral three-dimensional objects from successive layers of photoformable compositions by exposing the layers of the composition through a detachable flexible transparent film, one side of the film being in contact with the composition and the other side of the film with a rigid transparent plate, which guides and supports the film.

Abstract: Apparatus for and related methods of forming three-dimensional objects out of a building material, which is normally solid but which is flowable when heated. In one embodiment a support material is used to fill in portions of layers which are not to be solidified as part of the object to provide support to otherwise unsupported portions of other layers. Advantageously, the support material is also normally solid and flowable when heated, and has a lower melting point than the building material enabling the support material to later be removed without damaging the object. In an alternative embodiment this support material can be used to build a support such as a web support or the like for supporting an object surface from a second surface.

Abstract: In a coating device, a doctor blade is bent S-shaped for application of its contact force by means of a pressure bar. An additional force of a profile correction device is exerted for profile correction by means of magnets. This additional force acts preferably opposite to the main contact force. This prevents the profile correction device from causing a change of the geometry of the doctor blade in the contact area of the spreading edge of the doctor blade.

Abstract: In order to clean the support region at the bottom end of a doctor element which is clamped to a support and is thereby held to the surface of spreadable material to be doctored, the leaf spring doctor element is removable from a stop on the support against which the leaf spring is clamped in operation by a plate pusher. The support is shaped to have a groove extending along the width of the stop and the support for the doctor element. A sidewall of the groove is defined in a ledge that is movable along the support and along the groove. The sidewall supports oscillation pulse transmitters. A liquid pulse transmitting medium in the groove transmits the oscillations across the grove to the area of the leaf spring support to be cleaned. The oscillation pulse transmitters may be a series of transmitters extending along the sidewall along the groove or may comprise a long bar shaped oscillator which is oscillated at its ends.

Abstract: A doctor for the application of fluent material to a substrate (8), such as a material web has a pressing part (3) extending in the longitudinal direction of the application apparatus (application width), which comprises a working edge (30) passing over the application width (7), an actuator on the pressing part (3) along the working edge (30) and movable by means of a magnetic field, comprising at least one electromagnet and/or permament magnet (20), which together with the pressing part (3) forms a pressing unit (4).

Abstract: A coating apparatus and method is disclosed for applying coating material onto a web supported by a backing member. The apparatus includes a housing which is disposed closely adjacent to the backing member. The arrangement is such that the web supported by the backing member moves between the backing member and the housing. The housing defines a chamber having an open end facing towards the backing member. A coating shoe slidably cooperates with the web, the shoe being movably disposed within the chamber. The shoe defines a cavity which is connected to a source of pressurized coating material. The cavity has an exposed face towards the web such that the coating material flows into the cavity and through the exposed face for applying the material onto the web.

Abstract: A device for coating a web of material, especially a web of paper or cardboard, that travels around a backing roll, with a coating roll that scoops liquid coating from a chamber and demarcates in conjunction with the backing roll a coating nip, and with a flow-control system including a final flow controller and an initial flow controller upstream thereof in the direction that the web travels in and demarcating in conjunction with the backing roll an initial flow-control nip. The device has a non-resiliently supported initial flow controller that extends into the vicinity of the coating nip and demarcates it in the form of a chamber at the outlet end, whereby the initial flow-control nip remains open to the backing roll and to an outflow channel to the coating roll.

Abstract: A dry wall tape applicator where the tape moves through a chamber containing a taping compound and out a dispensing opening to a seam defined by two drywall panels. The dispensing opening is formed in part by an adjustably mounted plate, the position of which is controlled by a rotatable knob having an eccentric actuating stud member engaging a slot of the plate. The plate is held within close tolerances in a slideway so that the dispensing opening defines an accurately controlled slot of uniform width. The bottom wall of the housing has a convex configuration so that when the tape is in close proximity to the bottom wall, there is a proper application of the taping compound to the tape.

Abstract: A method of and apparatus for applying coating liquid to a web of paper traveling over a web supporting surface at speeds of 3,000, 4,000 and more feet per minute to produce a coated web free of streaking and other imperfections comprises apparatus for and the sequential steps of distributing coating liquid in a turbulent state over the supported web through a limited application zone within a very short dwell time of the turbulent liquid on the web; subjecting the coating liquid on the supported web to an initial doctoring by means of a primary doctor blade biased under pressure against the coated web at the rear edge of the application zone to form on the web downstream from the zone a relatively quiescent layer of coating liquid having a wet film thickness sufficiently in excess of the final wet film thickness to accommodate a subsequent final wet film doctoring of the coating liquid on the web; and, a a location downstream and isolated from the application zone, subjecting the relatively quiescent layer o

Abstract: The coating head substantially comprises an elastic blade thrust against the paper sheet which is transported by a rotating cylinder, and a chamber fit for containing a coating suspension which is delimited by a portion of the outer surface of the cylinder and by the blade and which communicates with a feeding line of the suspension; moreover, said chamber is delimited by a deflector plate, the position of which, in relation to the cylinder, can be adjusted so as to define an exhaust port for the coating suspension between it and the surface of the cylinder; according to the invention, the deflector plate is provided with a blocking element which can be elastically deformed and fit for limiting the passage of the coating suspension through said exhaust port, said element presenting a free edge facing the cylinder which is parallel to the cylinder axis.

Abstract: In a coating device, a doctor blade is bent S-shaped for application of its contact force by means of a pressure bar. An additional force of a profile correction device is exerted for profile correction by means of magnets. This additional force acts preferably opposite to the main contact force. This prevents the profile correction device from causing a change of the geometry of the doctor blade in the contact area of the spreading edge of the doctor blade.

Abstract: A paper coating system is characterized by an upstream dip roll applicator that applies an excess layer of liquid coating material onto a surface of a paper web, and an improved downstream doctor assembly for metering and leveling the coating on the web. The doctor assembly includes a doctor blade having a tip extended against and across the web and a shear plate, upstream of the blade, having a surface extending across and defining a gap with the web. An elongate chamber defined between the shear plate and blade extends across the web, and excess coating removed from the web by the blade flows into the chamber. Coating is drained from and uniformly along a lower end of the chamber at a rate to maintain an eddy current pool of coating in an upper end of the chamber immediately upstream of the blade/web nip, but to prevent formation of a liquid seal in the gap.

Abstract: Method and apparatus for applying a liquid film of controlled thickness to a paper web. The apparatus is in the form of a flexible blade coater having a flexible blade fixed at one end and bearing against a backing roll (with interposed web) at a free end. The blade has independent loading means, preferably pneumatic. An intermediate loading means applies a first load intermediate the fixed and free ends which serves primarily and substantially independently to establish blade geometry or tip slope. A second loading means positioned near the free end of the blade primarily and substantially independently establishes tip load for a given geometry established by the first loading means. The compound loading arrangement allows a wider range of finer control of coating film thickness.

Abstract: A slot die head for emitting a coating fluid onto a moving web has a slot orifice, the exit end of which is defined by replaceable inserts, the downstream one of which, relative to the direction of web movement, has a wiping flange cantilevered from a hinge portion thereof. The flange is disposed in use in facing relationship with the web and extends downstream from the slot orifice, so as to be resiliently hingedly movable in directions substantially normal to the web surface for maintaining constant shear levels across the coated area.

Abstract: A printed circuit panel is selectively coated to protect circuits which may be exposed to deleterious chemicals during the electroplating of connector tabs. The apparatus has a mechanism for gripping and transporting the circuit panels through multiple stations including cleaning, drying, coating and curing in a vertical position at variable speeds. The coating station has multiple wipers movable in a vertical plane to apply a polymer to the circuit panel at a controlled volume on various levels. The wipers each have a leading edge in contact with the panel surface to be coated and an adjustable back edge spaced apart from the panel surface to be coated with the polymer flowing to the panel between the two edges.

Abstract: A doctor blade and baseplate are adjustable to define a desired gap therebetween. The doctor blade is fixed in position, gap adjustment being effected by movement of the baseplate. Initial setting-up and levelling are effected by turnbuckles moving a supporting bar. The base plate is slidable vertically on the supporting bar via a pin-and-slot connection. Fine gap adjustment during operation is by screw jacks connected between the supporting bar and the baseplate and operated by a common driveshaft.

Abstract: An apparatus for applying a thin layer of a coating material (2) to a web of material (4) passing over a counter-pressure roller (3), with a slot nozzle device (1) includes a vertical nozzle box (5) with an upper nozzle slot (7) between inlet (8) and outlet (9) nozzle lips and a laterally mounted storage tank (6) for coating material (2). In order to keep the layer thickness the same and without coating flaws and thickened edges according to the operating speed and fluctuations in thickness of the web of material (4), the storage tank (6) is mounted on the nozzle box (5) in such a way that the liquid level of the coating material (2) in the storage tank (6) and in the nozzle box (5) is essentially the same. Furthermore, appropriately in the nozzle box (5) is provided a driven continuous conveyor roller (10) mounted eccentrically in a roller chamber (11) in the path of the coating material ( 2).

Abstract: An apparatus for coating a travelling web (5), including supply systems (10,15,16;31,33;41;47,49;73) for the supply of coating agent (11) to the web (5), the systems including a metering device (15;31;41;47,49;75;77) extending across the whole width of the web and which by an intermittent contact surface (27,29;37,39;43,45;47;49) provides intermittent engagement with the web (5) or a backing member (3) against which the web subsequently comes to engagement, for the deposition of strands of coating agent (11) on the web (5) or the backing member (3).

Abstract: A short dwell coater apparatus is disclosed for coating a web with a coating material, the web moving contiguously with a rotating backing roll. The apparatus includes a housing which is disposed on the opposite side of the web relative to the backing roll. The housing defines a chamber is connected to a pressurized source of coating material. The chamber is exposed to the web such that the web supported by the backing roll is coated with the coating material during passage of the web past the coating chamber. Each of a first and second weir extend in a cross-machine direction such that the coating chamber is bounded by the weirs and the web moving between the weirs. The first and second weirs define respectively first and second overflow gaps. The arrangement is such that during use of the apparatus, when the web moves past the coating chamber, coating material is coated onto the web while excess coating material overflows through the first and second gaps for recirculating through the coating chamber.

Abstract: A smoothing device for an applicator unit for applying a coating on a moving web of fabric, or the like. A hollow supporting beam supports a doctor element via a holding device carried on the beam. A supporting body extends through the beam. An outer pipe surrounds the supporting body and is radially spaced therefrom. Hydraulic pressure elements between the outer pipe and the supporting body transmit forces to the supporting body. At circumferentially spaced locations around the outer pipe, the outer pipe engages the interior of the beam, defining liquid transmission channels located circumferentially between the connections to the support beam around the outer pipe. The channels permit liquid to be transmitted axially of the support beam for transferring heat along and eliminating localized heat stress on the beam. Various cross-sectional shapes of the outer pipe and of the beam are disclosed.

Abstract: A flush inking unit for a screened surface ink fountain roller utilizes an inking groove spaced from and located within a housing to supply ink to the ink fountain roller. Ink dividing plates of the ink groove are spaced from the surface of the ink fountain roller. Printing ink which is supplied to the inking groove and which passes out of the groove through the spaces between the ink dividing plates and the roller is collected in the housing and returned to an ink supply reservoir.

Abstract: A squeegee device is used for applying materials of varying viscosities, such as coating substances, varnishes and adhesives to an application surface. The squeegee is pressed onto the application surface by a magnetic force. A profile member houses the squeegee and is pivotably supported by a bearing. The bearing allows the squeegee and profile member to be tiltable along an axis that is perpendicular to the longitudinal axis of the squeegee or profile member in order to insure a tilting-free and bending-free adjustment of the squeegee on the application surface.

Abstract: Apparatus and a method is shown for continuously, in an on-line production, applying a layer of coating material to the horizontal upper surface of a fiber glass blanket and the opposed vertical edge surfaces in a generally even layer and curing the applied material to form surface and edge coated fiber glass duct liner material.

Abstract: An apparatus for evenly coating back surfaces of building tiles and the like with mortar. It comprises a doctor blade, rails which support and guide tiles for movement below the doctor blade with said back surfaces of the tiles facing generally upwardly. The apparatus is adapted for receiving and retaining a supply of mortar on said back surfaces of the tiles adjacent one side of the blade. The blade is positioned a preselected distance above said back surfaces of the tiles whereby as the tiles are urged under the blade said back surfaces thereof are completely coated with mortar and excess mortar is scraped from the tiles with the mortar remaining on said back surfaces being of a substantially uniform thickness. In the method of coating back surfaces of tiles with mortar, tiles are placed on the rails with the back surfaces facing generally upwardly. A supply of mortar is placed on at least one of the back surfaces adjacent the blade.

Abstract: A known device for continuously coating a web (1) of material traveling around a backing roller (2), especially a web of paper or cardboard, with a resilient doctor blade (3) that is secured at the foot to a pivoting doctor beam (4) and with an element (10) for supporting the doctor blade above where it is secured to the side that faces away from the backing roller, whereby the attachment (8) of the foot of the doctor blade can be set independently of the supporting element to adjust the pressure of the doctor blade against the backing roller. The device has means (13-22) for pivoting the doctor beam to compensate for the change in the angle of the point of the doctor blade that results when the foot of the doctor blade is set.

Abstract: This publication describes a short-dwell coater for coating a web with coating mix against a rotating backing roll. The coater comprises a support structure, a feeder means adapted to the front lip for feeding the coating mix into an application zone formed between the backing roll and the support structure, and an actual doctor blade, adapted into the support structure to press against the web, with which blade the excess coating mix passing over form the application zone can be removed. According to the invention, a separate predoctoring blade is adapted at a short distance before the actual doctor blade in the machine direction of the web for smoothing out disturbances in the coating mix flow before the mix proceeds up to the actual doctor blade.

Abstract: A coater for coating a running paper or carboard web comprises a coating chamber having one side open against the web and means for filling the coating chamber with pressurized coating substance. The coating chamber is limited in the longitudinal direction of the web by a web entrance wall, and opposite thereof, a back wall in the form of a doctor member for forming a coating layer on the web. The distance between the walls is so short that, at normal web running speed, the web moves from the web entrance wall to the back wall in a time of at the most 0.3 s, preferably at the most 0.03 s. Coating substance is supplied by means of positive pressure to the coating chamber at a position close to the web entrance wall.

Abstract: In a process and a device for the impregnating and/or coating application of liquid, optionally foamed substances, through a slot the parts of the device performing the application are arranged to form a surface almost plan-parallel to the surface of the sheet material to be subjected to the application so that the trailing end of the application device is supported by the sheet material. Between the application device and the surface to be coated, a hydraulic pressure is generated which floatingly supports the device and which has a uniformizing effect on the application layer.

Abstract: Coating apparatus is provided for use in coating a sheet of goods which is carried on a counter-roller. The coating apparatus includes a coating zone which is formed along the sheet to be coated. At least one deflector is provided in the coating zone for deflecting the return flow of coating material deflected at the coating blade to a divergence angle of less than 90 degrees relative to the emerging flow of fresh coating material from the outlet port of the chamber containing the coating material. In general, angle of divergence between the two opposing flows of coating material is less than 60 degrees. In this manner, the amount of agitation and turbulence in the flow of material is minimized.

Abstract: In a device for coating a web of material that travels around a backing roller, the device having a coating chamber that opens toward the backing roller, that extends over the operating width, that has a slot demarcated at the web-intake end by an overflow plate for supplying liquid coating, and having a flow-control system at the downstream end, the improvement which comprises structures defining a coating-guide channelthat extends over the operating width at the outlet end of the coating chamber and terminates just upstream of the flow-control system,that is demarcated at one end by the backing roller and at the other by a baffle that essentially parallels the surface of the backing roller,that extends along the direction of travel at least 50% of the length of the overflow plate plus the flow-control system,that is open along its width perpendicular to the axis of the backing roller from 1.5 to 15% and preferably from 2.5 to 5% of its length, andthat terminates just upstream of the flow-control system.

Abstract: Arrangement for the coating of a running web (2), for instance a paper, a cardboard or a like web, by means of a so-called short dwell applicator (18), in which the paste supply, the paste doctoring and levelling of the supplied coating layer are carried out in the same arrangement and the amount of the excess supplied paste is collected for a recirculation. The arrangement comprises a rear edge seal (9, 12) and fore distributor (6, 15) so arranged that the coating paste is supplied on the web there, where the last quoted arrives in the arrangement, and then the paste flows mainly in the direction (22) of the material web (2) until it meets a doctor (3). The amount of supplied paste (1) is big compared to the amount of paste, which attached and levelled follows along with the running material web (2).

Abstract: An improved drawdown machine is disclosed in which an ink bead or coloring agent is evenly distributed over a receptor surface e.g. a sheet of paper by pulling the paper through a nip formed between a bed surface and a bar.

Abstract: A die, preferably one with internal metering pumps for applying an extremely uniform coating to a traveling web, is mounted over a pair of very rigid side plates. Horizontal surfaces of the plates support linear slides which in turn support the die through uprights. The slides have preloaded bearings to allow a linear movement of each upright with no lost motion. Pneumatic cylinders move each upright along its slide independently of the other upright. Adjustable stops set the die-to-web spacing when the cylinders draw the uprights, and therefore the die, toward the web. Other air/hydraulic cylinders drive the uprights away from the web, against the action of the main cylinders, to jump splices in the web. The system preferably includes an outrigger arm extending from each upright to a pair of auxiliary linear slides mounted on the side face of each side plate to relieve side loading on the main linear slides.

Abstract: A tool employing a solder foot to deposit solder on a series of conductive surfaces as the tool moves. In one embodiment, non-wettable blade attached to the tool breaks the film. A pair of sensors coupled to a control circuit monitor the position of the solder foot and the position may be changed as a function of the operation to be performed, i.e. deposit, reflow, standby while tool is moved. In a second embodiment a discrete solder mass is extruded and deposited on a preheated pad. In a third embodiment, solder wire is delivered to an omnidirectional tool for deposition.

Abstract: A method and apparatus for two-sided coating of a moving web, e.g. a paper web, and smoothing said coating. The direction of movement of the web (4) is substantially upwards. The web is fed through a coating chamber (3) and the coating is immediately smoothed in the top part of the chamber. The top of the chamber is formed by a flexible blade (5) and a rod (6) mounted rotatably on bearings, the blade and the rod forming a nip (7) where the coating is smoothed while the web passes through it. The nip is mounted at a short distance from the coating channel outlets (2).

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 relates to a method and an apparatus for continuously applying a uniform coating to a material web (5), in particular a paper or cardboard web, travelling over a back roller (6), to which the coating material is applied at low pressure by means of a coating roller (2) and with guidance by a guide plate (8) into the coating gap (7) formed by the back roller and the coating roller, whereupon the coating material is metered by a metering member (15) and in the region of a layer close to the material web is partly drained in order to form a barrier layer and final metering takes place in a final metering device (23) by means of a final metering member (24) with low contact pressure. Due to a three-stage method of this type and the apparatus suitable therefore, even at comparatively high material web speeds, constant good coating qualities can even be achieved with extremely low coating weights.

Abstract: A coating apparatus, for applying a coating substance to a paper web, has a chamber from which the coating substance is supplied via a slit type mouth communicating with an applicator space which is defined by the paper web and a doctor blade element. At the web, on the side of the applicator space from where the paper web enters, a throttling passage is formed by a back-pressure element in such a manner that a stream of excess coating substance issues from the applicator space via the throttling passage and abruptly separates from the web and in so doing flows away from the web predominantly as a film thereby preventing completely or almost completely the admission of air into the applicator space by the air boundary layer adjacent the moving web.

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: An apparatus for the application of liquid adhesives to a substrate comprises a supply container for the adhesive and an applicator nozzle which is connected via a conduit to the supply container and has a slit-like outlet opening which communciates via a supply passage with a spreading chamber; at the slit-shaped outlet opening a doctor blade secured by a clamp support is arranged.

Abstract: A short-dwell coater coats a web positioned against a backing roll with coating mix. The coater comprises a front lip as a part of the coater support structure, a feeder device adjacent the front lip for feeding the coating mix onto the paper web, a mouth piece (4, 5) forming an extension of the feeder device and forming an application zone (8) against the web (9), and a doctor blade mounted rearward of the application zone with respect to the forward machine direction. This blade doctoring the excess coating mix away from the web. The coater further comprises an intermediate lip (6) positioned between the feeder device and the doctor blade in conjunction with the front lip and forming together with web a space capable of acting as the application zone.

Abstract: A wet film applicator is movable across a surface such that a blade edge extending transversely of the direction of movement and supported with a clearance above the surface causes a film of flowable substance, positioned ahead of the blade edge, to be spread as a film over the surface. The blade is adjustable in height so as to raise and lower opposite ends of the blade by the same amount for spreading films with selected constant thickness. The blade is also adjustable in height so as to raise and lower opposite ends of the blade by different amounts for spreading wedge-shaped films at selected shapes.

Abstract: An end seal for a blade coater is provided wherein an elastomeric seal is held in a case by a plurality of needle-like projections extending from the case. The case has at least one side adapted to seal against, and conform with, the surface of the coater blade and is magnetically attached to the blade. This permits quick, easy adjustment of the elastomeric material in the coater to change coating widths, or the rapid replacement of the worn elastomeric end seal.

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 coating deckle of a coating device including a holder for a soft rubber sealing element wherein the holder includes a sealing tongue aligned parallel to the restrictor plate which extends parallel to the opposite roll supporting the web in the area of the coating device. The sealing tongue bears flat on the restrictor plate and seals in the area of the restrictor plate and the application space which is formed between the restrictor plate of the web or opposite roll and the blade element. The restrictor plate includes a groove in which the sealing tongue is movably held.

Abstract: Method and apparatus for applying coating liquid onto a moving base, such as paper or board web, the surface of a counter-roll or the like wherein the coating liquid is fed under pressure into a coating liquid chamber of a coating device defined by a coating member, a front wall, edge seals and by a region of the moving base to be coated. In order to seal the front wall of the coating device against the passage of air with respect to the moving base and/or to lubricate the front wall and moving base with respect to each other, a fluid material, such as a liquid, dispersion, solution or the like is fed to an inlet side of the moving base region forward of the base region and front member in the direction of movement of the base so that the fluid material moves substantially parallel to and in the same direction as the moving base.

Abstract: An apparatus and a method for controlling the thickness of coatings on webs at a plurality of cross-directional positions while a coating procedure is taking place. The deflection of the metering element is controlled automatically in response to measurements of the uncoated and coated web that determine the thickness of the coating being applied at a plurality of cross-directional positions. In one preferred embodiment, a bimetallic member having a plurality of separated tongue-like extensions corresponding to cross-directional positions along the blade is used, the tongue-like extensions pressing on the back of the blade at their ends in response to heat applied dependent upon the determined thickness of the coating being applied. In another embodiment, pneumatic actuators whose pressure may be varied in response to the determined thickness are used to adjust the position of the metering element at a plurality of cross-directional positions to locally vary the thickness of the applied coating.