Abstract: In a roller support device, an inner peripheral surface of a bearing box is covered with a material having a poor wettability with respect to a molten metal, such as tantalum, graphite, C/C composite, silicon carbide or the like. The molten metal does not adhere to the covered portion, or even if the molten metal adheres to and is solidified on the covered portion, the molten metal can be peeled off with a light force. Therefore, after a support roller is pulled up from the molten metal, the molten metal does not prevent a rolling bearing from shifting in the axial direction thereof so that the roller support device can prevent an excessive force from being applied to the rolling bearing when the support roller, after it is thermally expanded once, is contracted as the temperature falls.

Abstract: An apparatus for housing a plurality of applicators in a hygienic cavity and dispensing said plurality of applicators from said cavity. The apparatus includes a container for holding said plurality of applicators, a support structure for the plurality of applicators, a reservoir in fluid communication with the hygienic cavity, said reservoir being situated to facilitate wetting said plurality of applicators with said fluid during said dispensing; an aperture generally adjacent to said reservoir; said plurality of applicators traversing said aperture during said dispensing; and a dispenser structure actuable by a user from outside said container to engage at least one applicator of said plurality of applicators for causing advancement of said at least one applicator through said aperture to effect said dispensing.

Abstract: An apparatus for successive application of two coats of at least one coating medium on one side of a traveling fiber material web includes a rotating backing roll and a first rotating applicator roll having a roll surface. The first applicator roll and the backing roll define a first press nip therebetween. A first applicator assembly is positioned in association with said roll surface for applying a first coating medium to the roll surface. The first applicator assembly and the first applicator roll conjunctively define a first indirect applicator for applying the first coating medium to a first side of the fiber material web. A first drying apparatus is positioned after the first press nip relative to a direction of travel of the fiber material web. The first drying apparatus is positioned in association with the first side of the material web. A second applicator is positioned after the first drying apparatus relative to the direction of travel of the fiber material web.

Abstract: A support strip is braced against a doctor blade for coating a web and consists of spring steel sheet subdivided by slits into tongues. The tongues are securely clamped at their ends facing away from the dosage element and the continuous frontal edge is supported between guide strips so as to be movable in the direction of the dosage element. Adjustment elements engage at the tongues to cause them to bend perpendicularly with respect to the span of the tongues to control the force applied to the doctor blade.

Abstract: A method and an apparatus for forming a waveguide conductor ribbon by passing several light waveguides through a through-opening so that as the waveguides are passed through the opening, they are coated by a liquid coating material, which creates a drag force current for moving the waveguides through the opening. The diameter of the light waveguides and/or the position of the light waveguides inside the ribbon conductor is determined and the width of the through-opening of the coating apparatus is modified on the basis of the measured diameter value and/or on the basis of the size of any gap between the fibers to optimize the amount of drag current forces being produced.

Abstract: The device for impregnating a web laterally guided in the width direction with a treatment liquid comprises a tank for the treatment liquid through which the web is taken on an impregnation section and a pair of squeeze rollers arranged above the tank between which the web can be taken from below immediately after leaving the tank. The tank takes the form of an upright flat channel, the flat sides of which are tightly opposed, through which the web can be taken upwards, which can be kept full up to an optional level and the lower end of which is limited by a resilient sealing arrangement bearing on the web from both sides.

Abstract: In an apparatus for the application of a liquid or pasty substance onto a traveling material web, notably of paper or cardboard, a doctor bar serving the metering of the applied substance is composed of at least two bar segments strung together in the longitudinal direction of the doctor bar and fixedly joined to one another. Possible thereby, in the manufacture of the doctor bar, is an easier handling and a better compliance with accuracy requirements.

Abstract: An applicator device for applying a coating agent onto a moving base, such as a paper or board web, onto the face of a film press roll, or equivalent, and a method for correcting for distortions arising from thermal strains in such an applicator device. The applicator device includes an applicator beam arranged in a direction transverse to a running direction of the moving base, a coating-agent feed pipe arranged in the transverse direction and mounted on the applicator beam, and coating members mounted on the applicator beam for applying a coating onto the moving base and spreading and smoothing the coating agent onto the moving base. The coating-agent feed pipe and the coating members are constructed as a single unit. The device also includes mounting members for mounting the single unit of the coating-agent feed pipe and the coating members on the applicator beam.

Abstract: The invention concerns a device (1) for applying a substance (9) to a surface (3), the device comprising a carrier beam (2) and a doctor blade unit (40) which can be pressed magnetically against the surface (3). Provided between the doctor blade unit (40) and the carrier beam (2) is a holder connection (5) which produces play transversely to the surface (3). The holder connection (5) comprises at least one pair of sliding holder elements (51, 52) which can move only in translation, interact and form a sliding guide plane (500) which can be aligned on the region of the doctor blade element application zone (31). The holder elements are interconnected in a manner rigid against tilting such that all the moments due to thrust forces on the doctor blade unit (40) act with respect to a point of application on the carrier beam without losses of moments.

Abstract: The invention concerns an applicator mechanism for the coating of running webs of paper or cardboard, with an applicator chamber which carries at least 0.01 bar of pressure, is formed on a roll and defined in running direction by a doctor element on the trailing side of the coating chamber with respect to the direction of movement of the outer surface of the web or roll, and a barrier wall disposed at the leading side of the coating chamber with respect to the movement of the outer surface of the roll or web.

Abstract: A short dwell coater and film applicator coating has an application chamber between an inlet overflow baffle plate and a final metering element. An adjustable wedge is spaced in the machine direction from a fixed wedge to define a gap which serves as a coating extraction port. A cylindrical rod is positioned in the extraction port which is about 3/8th to about two inches in diameter and is driven to rotate at a rate of between one and one-hundred rpm. The rod serves to extract air and coating from the application chamber. Alternatively, an adjustable plate may be positioned to obstruct an opening leading to the extraction port.

Abstract: A coating die is disclosed, in which a slit-like spacing 29 is formed between a pair of die elements 25, 27 arranged in opposed relation to each other. A band-shaped electrode sheet 23 is movable along the length of the spacing 29. The sides of the slit-like spacing along the width of the electrode sheet 23 are enclosed. An electrode piling agent is supplied from an external source into the die element pair 25, 27 through supply flow paths 47, 49. Discharge ports 47a, 49a of the supply flow paths 47, 49 are open to the slit-like spacing 29. The portion of the spacing 29 downstream of the discharge ports 47a, 49a in the direction of movement of the electrode sheet 23 has a thickness equivalent to the thickness of the electrode sheet 23 plus the thickness of the electrode piling agent coated on the two sides of the electrode sheet 23. The portion of the spacing 29 upstream of the discharge ports 47a, 49a has a thickness substantially equal to the thickness of the electrode sheet 23.

Abstract: A coating apparatus comprises a head (25) having opposite edges (6, 7) cooperating with each other to provide an outlet (4a) of a coating liquid supply slit (4), and opposing portions (23a, 23b) between which a longitudinal recess (28) is formed, and a plurality of adjusting devices (30) having opposite ends (31, 32) engaged with the opposing portions of the head. A pulling or compressive force is developed between the opposite ends of each adjusting device so as to adjust the clearance (D) of the opposite edges. The adjusting means are movable in the longitudinal direction of the apparatus with their ends being engaged with the opposing portions of the head.

Abstract: A core tube for mounting in the axial bore of the body of cross-head die apparatus through which a filamentary member is drawn as a layer of flowable coating material is applied thereto. The coating material is injected through a radial bore having an axis intersecting an annular groove extending 360 degrees around the core tube. The annular groove communicates with a flow passage leading to the die orifice both through an annular space surrounding the forward end of the groove and through three axial grooves, two of which are of the same size and the other larger. The larger groove is positioned 180 degrees from the axis of the radial bore in the die body and 100 degrees from each of the small grooves.

Abstract: An apparatus that comprises a body including a reservoir adapted for receiving a quantity of fluid and a plurality of fluid distribution channels each having a length and a cross-sectional area and being in fluid communication with and extending from the reservoir from a first end and terminating at a second, distal end in an orifice. The apparatus further comprises a distribution chamber in the body for commonly receiving the fluid exiting each of the orifices, for merging the fluid exiting each of the orifices into at least one continuous coating stream, and for equalizing the pressure of the fluid, the distribution chamber having a first side in fluid communication with the plurality of fluid distribution channels and a second side that is open to allow the fluid to exit the body for uniform distribution onto the web.

Abstract: A blade holder for disposing a blade proximate to a roll for transporting a continuous web of material includes a blade positioned transversely to a direction of movement of a continuous web of material. The blade tensioning device is disposed on a blade supporting beam extending transversely to the direction of movement of the web, the blade supporting beam swivelable and oscillatable transversely to the direction of movement of the web. The holder includes a supporting element and a stand having a bracket upon which a first drag bearing is disposed, the supporting element rotatably supported by the first drag bearing. A second drag bearing links the supporting element, the blade supporting beam, and a lever. The holder also includes a swiveling device for swiveling the blade supporting beam from a working position to a maintenance position and a positioning device for adjusting a blade working angle.

Abstract: The invention relates to an application unit for the direct or indirect application of a liquid or pasty medium (12) onto a moving material web, in particular consisting of paper or board, comprising a dosing gap formed as a free jet nozzle, the dosing gap being formed between a leading lip (4) and a trailing lip (8), and at least one feed channel (14) leading to the dosing gap. The application unit is characterized in that the dosing gap is subdivided in a comb-like manner and has a plurality of defined through-gaps (32) for the liquid or pasty medium (12).

Abstract: A knife coater for the application of one or more magnetizable dispersions located one on top of the other to a moving flexible substrate by means of a plurality of coater slots which are arranged essentially horizontally and parallel to one another in a multipart block and are fed from reservoirs is described, the outlet orifices of the coater slots being essentially opposite the summit of a concave support surface for the substrate, the substrate transporting the applied layers, the outlet surfaces of the coater block which are opposite the support surface being adapted to the radius of the roll and the inflow gap being larger than the outflow gap.

Abstract: Apparatus and method for applying a coating solution to a running substrate using a slot die having two die lips forming a gap therebetween. The gap also defines an outlet for releasing the coating solution to the substrate. The lips have plurality of manifold chambers communicating with gas feeder and coating solution feeder provided in the die lips. The manifold chambers communicate with the outlet. The width of the coating solution is adjustable with the gas pressure applied to the gas feeder.

Abstract: An applicator in which a coating can be applied to a base material at high speed, a coating film can be thinned and a desired coating film can be obtained when the coating films of two or more layers are simultaneously formed. A die 2 is provided with a slit 5 for a lower layer and a slit 15 for an upper layer which respectively serve to extrude a coating 6 for the lower layer and a coating 16 for the upper layer to the base material. The coatings 6 and 16 are respectively extruded from these slits 5 and 15 to the continuously running base material 1 so that the coating films of two layers are formed. Lower layer lips 4 forming the lower layer slit 5 are provided so as to be not in contact with the base material 1. Upper lips 14 forming the upper layer slit 15 are provided so as to abut on the base material 1. When a magnetic coating is used as the coating 6 for the lower layer, a magnet part may be opposed to the lips 4 for the lower layer by sandwiching the base material 1 therebetween.

Abstract: A cross-head die for applying one or more layers of coating materials to a single, longitudinally fed, filamentary member, or to a plurality of such members in spaced, side-by-side relation. Tip and die members of relatively flat, wafer-like configuration are placed in a cylindrical cavity of the body member of the apparatus with central openings in each of the tip and die members coaxially arranged and a protrusion surrounding the opening in the tip extending into the opening in the die. Flowable coating material is injected through a radial opening in the body member and flows in both directions about an annular passageway formed by cooperatively arranged grooves in the peripheries of the tip and die members. The coating material flows from the annular passageway to the die aperture through opposing, spaced, angularly arranged surfaces on the tip and die members.

Abstract: A coating apparatus comprises a coating vessel holding a coating liquid with a liquid leakage preventing member having an opening. A cylindrical member such as a cylindrical support for supporting a photosensitive member is inserted into the opening and the cylindrical member is moved relative to the coating liquid vessel in the vertical direction. A scraping member for scraping the coating liquid is at least partially immersed in the coating liquid, or is positioned above the surface of the coating liquid in the coating liquid vessel, the scraping member being almost concentric to the cylindrical member and movable in the radial direction of the cylindrical member. The cylindrical member is axially aligned with the scraping member using coating liquid pressure applied to the scraping member to coincide the center of the scraping member with the center of the cylindrical member.

Abstract: A pre-metering rod is located between a coating applicator and an air knife, and replaces the smoothing roll in some existing air knife applications. The pre-metering rod consists of a small diameter rod of about one and one-half inches in diameter that rotates at 10-500 rpm against the direction of the coating layer on the web. The web is wrapped around a portion of the circumference amounting to about twenty-five degrees of the rod's surface as it travels over the rod. The rod is supported in a rod holder supported on a support beam. Actuators move the support beam away from the web for threading and maintenance, and towards the web to engage the rod with the web. The combination of the rod diameter, the amount of wrap on the rod, and the speed of the rod rotation determine the amount of pre-metering of the coating, which determines the thickness of the coating layer on the web that is presented to the air knife section. As a result, the thickness of the coating layer can be decreased.

Abstract: An improved applicator die for alternately depositing different liquid coating materials on a moving web comprises a die body having switch bars for opening and closing respective flow passageways for supplying the different liquid coating materials to an elongated coating orifice from respective manifolds. The switch bars, flow passageways and manifolds are substantially as wide as and substantially parallel to the coating orifice of the die whereby changeover between different coating materials can be made very rapidly.

Abstract: Continuous removal of particulate surface contaminants, for example, from flat-rolled steel work product, is achieved free of unscheduled interruption by continuing control of surface cleaning liquid characteristics which enables continuing recycling. A major portion of the cleaning liquid of a large capacity tank is continuously circulated between surface treatment of the work product and a continuous in-line type cyclone filtering apparatus, with continuous return of filtrate to surface cleansing. A minor portion (about ten percent) of the cleaning liquid capacity is used to concentrate contaminants by continuously purging the filtering apparatus. Concentrated contaminants are directed to a non-magnetic tank structure with sources of magnetic flux mounted along its external surface such that penetrating magnetic flux acts internally to separate and retain contaminants. Decontaminated liquid is returned for continuing surface cleansing.

Abstract: A hot dip coating apparatus and method for coating a continuous steel strip, wire, or like continuous member with zinc, aluminum, tin, lead, or alloys of each. A molten coating bath is contained in a vessel having a bottom opening upwardly through which the steel member is directed. Magnetic containment devices located below the vessel's bottom opening prevent the escape of molten metal from the vessel through the opening. There are no guide rolls, or other rolls that act on the continuous steel member, in the bath.

Abstract: Disclosed is a coating die for coating a web with a solution, wherein the web is conveyed in a predetermined direction so as to run in the vicinity of the coating die; comprising;a body forming the coating die,a coating surface provided on the body at a position close to the running web;a solution chamber provided in the body;a feeding conduit provided in the body, wherein the solution is fed from the outside of the body to the solution chamber through the feeding conduit;a slit provided in the body so as to connect the solution chamber and the coating surface, wherein the solution is fed from the solution chamber to the coating surface through the slit, and then the solution is transferred from the coating surface to the running web;a dry surface provided on the body and positioned upstream of the coating surface in terms of the web-running direction; anda polymer layer formed on at least one of (1) the dry surface, (2) an internal surface of the slit, and (3) internal surfaces of the solution chamber and th

Abstract: Roll 13 drives base material 12 run continuously, and nozzle 1 applies paint 11 supplied by head 2 on base material intermittently. Head 2 shuts the flow of paint 11 to nozzle 1, when application of paint 11 is suspended, and guides to a place other than nozzle 1, at the same time sucks paint 11 staying in the inside of nozzle 1 and at the exit of slit 7 to sucking part 25 provided in inside of nozzle 1; when application of paint 11 is resumed, releases the flow of paint 11 to nozzle 1, at the same time returns paint 11 that was sucked in sucking part 25 to the inside of nozzle 1; thereby the starting edge and the ending edge of coated areas intermittently applied on the base material can be made to assume a straight line shape, and occurrence of the thicker coating at the starting edge is also prevented.

Abstract: The invention involves a fluid treatment device to solution or melt impregnate a resin or polymer or any combination thereof into a reinforcement which can be utilized to fabricate composite materials for laminates, circuit boards, structural/aerospace materials, automotive components, etc. The invention offers significant advantages and benefits over existing methods and equipment and allows the impregnation process to be performed at lower cost and higher efficiency with increased environmental safety.

Abstract: Coating devices for application of coating material to the surface of a web or a flexible substrate utilizing the study of flow patterns in blade coating to develop high-speed coaters, wherein the coater may be modified to provide an air layer between the coating liquid and any lower boundary. The coater devices of the described embodiments provide two inlet channels and an outlet channel. The first inlet channel carries the coating liquid, and the second channel can be used to pump the carrier fluid, e.g. air, into the coating head to pressurize the chamber and to keep the contact wetting line at the upstream section attached to the substrate. The air layer serves as a carrier fluid removing the wall shear stress on the coating liquid in the channel, and thus the coating flow for the operation of the device may proceed without flow separation from the wall (i.e., in a vortex-free mode) at relatively low flow rates appropriate for commercial applications.

Abstract: An application unit for directly or indirectly applying a fluid or pasty medium to a continuous material web, particularly one made of paper or cardboard, includes a beam that extends across the entire length of the application unit, and a distribution pipe arranged within beam. The pipe is connected via through-flow openings to a feed duct merging into a metering gap forming a free-jet nozzle. The pipe may alternatively be coupled to an application chamber. The through-flow openings are arranged in an upper portion of the distribution pipe and at least one discharge opening for fluid or pasty medium is provided at any one or more other portions of the distribution pipe.

Abstract: A sensor and a method for determining the basis weight of a coating material containing CaCO.sub.3 on a substrate is described. The determined basis weight is insensitive to changes in the amount of substrate material underlying the coating. Signals from the sensor may be used in the control of a coating mechanism to provide a coating having a uniform basis weight.

Abstract: The invention relates to an application unit (2) for directly or indirectly applying a fluid or pasty medium (22) to a continuous material web, particularly one made of paper or cardboard, comprising a metering gap (20) designed as a free-jet nozzle and formed between a leading-side lip (4) and a trailing-side lip (6), and a guiding surface (8) arranged at the free end of leading-side lip (4) or trailing-side lip (6) and adjoining metering gap (20) for the fluid or pasty medium (22). Guiding surface (8) above the outflow of metering gap (20) is pivotable around an axis running essentially parallel to the application unit's longitudinal extension.

Abstract: In-line flat-rolled steel cleansing and finishing methods and apparatus are disclosed which enable flat-rolled steel, as supplied with surface areas contaminated with iron fines and other debris from gauge reduction operations, to be continuously processed in-line, free of interruptions for cleansing purposes. Continuous-strip methods and apparatus are disclosed which enable in-line continuous-strip cleansing in a manner which decreases iron fines carried by strip surfaces to a desired level while providing for continuous uniform cleansing. Carry-over of iron fines from the cleansing operations so decreases such that iron content of a coating means is decreased resulting in improved corrosion-protection coating. Diminishing iron content in a hot-dip galvanizing bath increases efficiency of aluminum additions and diminishes iron-aluminum dross.

Abstract: In a duplex type coating apparatus, a left-right pair of dies and are disposed on opposite sides of a carrying path of a web, the dies and are each made up of an upper member and a lower member, a tip part of the lower member projects further toward the carrying path than a tip part of the upper member, and coating liquid discharge passages are inclined in the direction of the carrying path of the web. As a result, because the same amount of coating liquid is discharged from each of the dies and coated onto each side of the web, it is possible to carry out coating at the same coating thickness and in the same position on both sides of the web.

Abstract: An application unit for applying a liquid or pasty medium onto a surface moving past the application unit. This has particular application to direct or indirect application of such a medium to a paper or board web. A support beam and a front wall supported generally further from and a rear wall supported generally closer to the moving surface. The walls are spaced apart for defining a pasty medium supply gap between them and are oriented so that the supply gap generally directs the medium toward the surface. The front and rear walls can selectively receive releasable attachment of members for forming a liquid medium an application chamber, the chamber having a downstream end with a blade, an upstream end with a damming strip over which the excessive medium in the application chamber can overflow. Alternatively, a second set of attachable members may be attached to the walls for forming a free jet nozzle dosing gap that communicates with the supply gap for directing the medium to the surface.

Abstract: A sprinkling device for applying powdery to granulated materials, particularly super-absorbing swelling substances (SAP-material) to a continuously moving material web in the manufacture of suction cores for sanitary napkins, disposable diapers, etc. The SAP-material is withdrawn from a supply container by a toothed belt of a conveyor system. The toothed belt has conveying troughs of varying shapes to enable an exact volumetrically metered amount of SAP-material to be disposed onto a predetermined surface of the material web.

Abstract: This invention describes a process and an apparatus for the raster-formed coating of web-shaped flexible flat articles (3) with hot-melt adhesives in a screen printing process by filling all perforations of a rotary screen printing stencil (1) by means of an outer blade (6) with a solution or dispersion of a paste (2), by placing the flat article (2) on the rotary screen printing stencil (1) and by subsequently additionally applying a paste (5) by means of an inner blade (4). On the finished product, paste (2) produces a plastic base layer which is not or only slightly capable of thermal activation and paste (5) produces a hot-melt adhesive top layer which is easily capable of being thermally activated. Following the drying and sintering of the double-layered printed flat article (8), it can be used as an attachable inlay material for items of clothing.

Abstract: A die coating apparatus includes a die having an upstream bar with an upstream lip and a downstream bar with a downstream lip. The upstream lip is formed as a land and the downstream lip is formed as a sharp edge. A low surface energy covering is applied to the surface of the downstream bar adjacent to the sharp edge, and to the surface of the land, adjacent to its downstream edge. This presents a generally undulating surface. The low surface energy coverings need not extend completely to the edges of the downstream bar and the land.

Abstract: Apparatus for removing an excess amount of a liquid coating material from portions of a moving web following coating of the moving web with the liquid coating material along a coating path. A vacuum head having a suction slot is defined by upstream and downstream walls and adapted to be movably positioned in an inoperative position away from the coating path and in an operative position contacting at least a portion of the liquid coating material on the moving web along the coating path, the downstream wall positively displacing a portion of the liquid coating material when the vacuum head is positioned in the operative position. A suction mechanism is operatively coupled to the vacuum head for establishing a vacuum manifold within the suction slot and communicating with a disposal system. A supply of liquid is operatively coupled to the vacuum head for supplying liquid to the suction slot.

Abstract: A processing system to produce printed circuits or other finished materials on a continous strip of substrate comprising a processing cabinet having an entry opening and an exit opening formed on opposite ends thereof, a supply station and a take-up station disposed adjacent the entry opening and the exit opening respectively, a transport mechanism to transport the continuous strip of substrate from the supply station through the entry opening, the processing cabinet and the exit opening to the take-up station and a system control to selectively control the tension and speed of the continuous strip of substrate traveling from the supply station to the take-up station.

Abstract: In a coating device, a nozzle is configured by combining a front block and at least one back block. A front block includes a portion which is projected toward the base member with respect to the back block, and a top face of the projected portion is processed into a curved face having a predetermined curvature radius. A top face of the back block, which is opposed to the base material, is processed into a flat face, and a plurality of discharging openings are provided therein for discharging a coating material therethrough. The base material first travels along the curved face of the front block. The base member then travels over the flat face of the back block substantially in parallel with the flat face, while the coating material is discharged through the discharging openings, thus forming a stripe-shaped coating film on the surface of the base material. A line width and a thickness of the thus formed stripe-shape coating film is controlled to stay at designed values and fluctuation thereof are eliminated.

Abstract: A system is disclosed for forming metal tubing and, more particularly, brake tubing. The system includes a mill for rolling a metal strip into a tube so that at least a portion of the strip overlaps itself. The strip is then brazed so that the overlapping portions of the strip fuse together and form the tube. Thereafter, the tube passes through a cooling tunnel which cools the tube to a temperature such that the tube can be coated with a corrosion resistant material, such as a zinc based material. An inert gas, such as argon, and/or a reducing gas, such as hydrogen, is introduced into the cooling tunnel to prevent or remove oxidation of the tubing as it passes through the cooling tunnel.

Abstract: A device for application of a minimum quantity of fluid to a web of goods of a given width, wherein application takes place by means of an application beam in which the fluid is distributed uniformly over the working width through a plurality of fluid lines that branch in the manner of a tree trunk. The outlet openings of the lines terminate in a slot that is open facing the web, the length of the slot being delimited by two lengthwise edges. These edges press against a pressure roller located on the opposite side, i.e the back of the web. By means of these lengthwise edges, as the web passes though, its nap is compressed twice, once at the beginning of application with a first lengthwise edge, after which the nap stands up again in the slot and is saturated with the fluid, and again at the end of the application, after which the web is finally squeezed against the second lengthwise edge.

Abstract: A roll doctor assembly as dosing element for a coater serving to coat a traveling web (e.g., paper web) features a rotatable doctor bar (14) that extends transversely across the web width. The doctor bar (14) is fitted in a doctor backing (12). The doctor backing (12) extends as well transversely across the web width. According to the invention, the doctor bar (14; 14'; 14") and the doctor backing (12; 12'; 12") are part of a modular system, so that the doctor bar is exchangeable for another with different outside diameter and, consequently, the doctor backing is exchangeable for another with different bearing diameter. The different doctor backings are adapted to one another to the effect that the axes of rotation of the different doctor bars (14; 14'; 14") assume the same position relative to the support beam (10).

Abstract: The invention is directed to an applicator for coating a traveling fiber web with a coating mixture. The applicator includes a backing roll having a shell surface for carrying the web, and a nozzle for feeding the coating mixture. The applicator includes a support beam; a nozzle which is integral with or connected to the support beam; and a doctor bar carried by the support beam. The doctor bar has a guide surface. The guide surface and the backing roll define a nip for producing a hydrodynamic pressure. The guide surface approaching the shell surface of the backing roll extends to an exit edge at a location nearest the backing roll. A device is provided for flexibly backing the doctor bar on the support beam.

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: The present invention provides an enclosure for a coating apparatus, the coating apparatus being of the type comprising a coater face adapted for the flow of a fluid thereover. The fluid flows over the coater face in the form of a film having one or more edges contacting the coating apparatus at one or more "edge contact surfaces." The enclosure defines a partially enclosed space above one or more of the edge contact surfaces. The atmosphere within the partially enclosed space can be at least partially saturated with solvent vapor to prevent or inhibit drying of coating fluid at the edge contact surfaces. Also, the enclosure has a shape that allows visibility of and access to a substantial portion of the coater face of the coating apparatus.

Abstract: An apparatus for applying a fluid to an outer surface of an elongated work piece having a longitudinal axis and a cross sectional shape, perpendicular to the longitudinal axis. The apparatus has a head member having an interior wall cross sectional shape adapted for receiving the cross sectional shape of the elongated work piece. The interior cross sectional shape defines an interior wall of the head member. The head member has an input end and an output end. The interior wall has means for applying the fluid to a surface of said elongated member. The head member has preferable a first part and a second part which are joined by an expandable member.

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.