Abstract: The invention is a contact die for dispensing of flowable material on a substrate. The contact die includes at least one die block including a first internal passage. A die lip portion is disposed on the die block having a lateral dimension. A first plurality of orifices is disposed through the die lip portion proximate to each other and in communication with the internal passage to dispense flowable material as a single strip on the substrate. A first edge is disposed on one lateral side of the first plurality of orifices to direct the flowable material.

Abstract: An apparatus for direct or indirect application of a liquid or pasty medium onto a traveling material web includes at least one rotatable backing roll wrapped in part by the material web and supporting a side of the material web near the backing roll. The backing roll surface and the material web form a cuneiformly tapering entrance gore and an exit gore. At least one applicator opposes the backing roll and coats a side of the material web away from the backing roll with the medium, and/or further treats the coated material web side. A boundary layer stripper is arranged, in relation to the direction of rotation of the backing roll, before the applicator. The boundary layer stripper removes an air boundary layer entrained by the backing roll and/or the material web. The air boundary layer stripper is arranged in the entrance gore between the backing roll surface and the side of the material web near the backing roll.

Abstract: In coating with two slits of a coating slit and a recovering slit, by optimizing the slit clearance of the coating slit and the recovering slit, a coating layer with a very small and even thickness can be obtained. In a coating apparatus in which after a coating liquid is applied to a web to excess through the coating slit, a desired amount of coating liquid is applied to the web by scraping off an excess of coating liquid with a recovering slit, there is provided a slit clearance adjusting device for adjusting the slit clearance of the recovering slit.

Abstract: In a spray gumming unit, a gumming device is equipped with an ejector that sprays an adhesive substance and that is connected with a shutter element. The shutter element moves towards and away from the ejector between a position where it closes the ejector and in which a pad, fixed to one end of it, is in contact with the ejector, and a position where the ejector is left open. During the movement of the shutter element and of the pad between the ejector open and closed positions, an applicator applies an antiadhesive liquid substance on the pad.

Abstract: A coating device for carrying out a die coating method, which is capable of rapidly and assuredly eliminating an undesirable streak occurring in a coating layer during the coating operation. The coating device includes a coating head spaced from a back-up roll, and a shifting mechanism for shifting the coating head close to and remote from the back-up roll. The shifting mechanism includes a reciprocation carriage mounted onto a stationary frame to be linearly reciprocatedly movable thereon, a drive section for reciprocating the reciprocation carriage on the stationary frame, and a stop section for selectively hindering the linear motion of the reciprocation carriage caused by the drive section at a desired position. The shifting mechanism operates to instantaneously reciprocate the coating head at a small distance so that a distance between the outer surface of the back-up roll now carrying out the coating operation and the coating face of the coating head temporarily increases.

Abstract: It is possible to obtain a screen printing apparatus and a screen printing method wherein a high pressing force is not required to print paste on a substrate thereby assuring reliable printing qualities. In the screen printing apparatus which prints the paste on the substrate through pattern holes, the paste in a storage section is pressurized and forced out of a printing space portion through a transfer passage. The paste is given a rolling motion while it is guided by rolling guide surfaces disposed at the printing space portion, and then, the paste is filled into the pattern holes from a printing aperture formed by two scraping members.

Abstract: A method and apparatus is provided for applying a plaster-like coating material to the decorative exposed surface of a preform workpiece. The apparatus comprises; means for mechanically advancing a workpiece along the apparatus along a straight horizontal axis over a non-continuous surface; means for engaging the bottom portion of a workpiece to constrain lateral and vertical movement as the workpiece passes along the apparatus; and means for applying a desired thickness of plaster-like coating material to a decorative surface of an advancing workpiece. Both the method and apparatus provide on a consistent basis, a smooth coating with a controlled thickness tightly bonded to the entire exposed decorative surface of a workpiece. The method and apparatus provide a simple, efficient, cost effective and reliable means for applying a plaster-like coating to the exposed decorative surface of a workpiece for use on a commercial scale in the construction industry.

Abstract: A coating apparatus has a paint supply device, a mouthpiece for dispensing a paint supplied from the paint supply device, and a stage for holding a coated object. A 10-point average roughness Rz of a surface of the mouthpiece facing the coated object is not more than 1.0 &mgr;m.

Abstract: Edge faces with level differences are formed by assembling blocks constructing a coating head, and level difference variances in the width direction of a web are measured by a level difference variance measurement device. Then, the level difference variances are adjusted with reference to measured results, so that the level difference variances can be reduced. Therefore, coating layers can be uniformly formed on the web.

Abstract: The invention pertains to a coating apparatus and method in which most of the relative movement between a dispensing head and the substrate to be coated is provided by the coating head. The moving head configuration reduces the system footprint and diminishes leveling problems. A powered shuttle mechanism carries a dispensing head above a substrate to be coated while riding on a bearing located underneath the chuck holding the substrate thereby providing rigidity and reducing the system footprint. Chuck support is designed to accommodate anticipated vertical sag in the dispensing head by supporting the chuck at points along its periphery thereby permitting the chuck to sag in conjunction with the dispensing head. The shuttle mechanism is equipped with means for automatically adjusting the height of the dispensing head with respect to substrate to compensate for substrate placement error, substrate dimensional variation, and mechanical drift in the mechanical machine parts.

Abstract: A fluid treatment device and method for treating moving substrates with fluid as the substrates move through the device at a relatively high rate of travel. Fluid injection in combination with the application of vibration energy (e.g., ultrasonic) results in enhanced fluid treatment of the substrates. In one embodiment, a bifurcated horn is utilized in combination with fluid injector members having pluralities of rows of spaced injector ports, the injectors being strategically positioned relative to the vibrational source. In one example, the device and method may be used for enhanced penetration by dye materials of ceramic substrate surfaces to detect adverse surface conditions (e.g., cracks) and thus potentially defective product.

Abstract: A method and apparatus for continuously coating moving web and splices with a coating fluid. The system includes a slide coating die having a slide surface with at least one feed slot for extruding the coating fluid onto the moving web. The slide coating die defines a coating gap with the moving web. The coating gap is adjustable between a coating position and a splice coating position. A web guide is positioned to guide the moving web in a first direction past the slide coating die such that a coating bead of the coating fluid can be formed in the coating gap. A vacuum system is positioned to generate a reduced pressure condition along a lower surface of the slide coating die. The vacuum system defines a vacuum gap with the moving web. The vacuum gap is adjustable independent of the coating gap between a coating position and a splice coating position. A detector signals an increase in web thickness. A controller is functionally connected to the detector.

Abstract: A tip assembly includes a tip having a nose portion. The tip defines a central bore. The nose portion includes a lip portion and defines a counterbore. The counterbore has a counterbore side wall and a seat surface. The counterbore is contiguous with the central bore. An insert member includes an inner surface, an outer surface and a side wall. The inner surface is opposite the outer surface. The side wall interconnects the inner surface and the outer surface. The insert defines a central aperture that extends from the inner surface to the outer surface. The insert is disposed within the counterbore such that the central aperture is substantially concentric with the central bore of the tip. The lip portion of the tip engages the outer surface of the insert.

Abstract: A system for laying down stripes of solution on substrate is described. The substrate preferably comprises a web of material set on a backing roller passed by a specially configured die. The die includes at least a mouth with lips extending beyond a face or body of the die. The die is adapted to avoid fluid leakage therefrom. Upper and lower portions of the die defining the mouth are preferably substantially flat and mirror images of each other. The lips are preferably placed in close proximity to the material on which the solution is to be deposited. Solution passing through the mouth of the die is directed to the webbing and deposited in a substantially constant thickness stripe or band. Often, the solution comprises a reagent-type solution. The solution coating is typically dried onto the substrate. Dried product may then be used in reagent test strop production.

Abstract: A method and apparatus are disclosed for applying solder mask to an area respective of a plurality of receiving pads on a Printed Circuit Board. The solder mask can be at least partially removed during the component removal process exposing the conductor, via and annular ring. The exposed conductor, via and annular ring can cause defects and unreliable solder joints should the solder flow along the conductor and into the via. A small stencil can be used to apply solder mask in a desirable pattern to a selective area of a PCB. Alternatively, an elastomeric transferring apparatus can be used. Various methods can be included to assist in aligning the applicator to the desired area such as an overlaid, dual imaging system.

Abstract: The object of the present invention is to provide an apparatus and a method for applying a viscous fluid whereby a constant application diameter is achieved through a simple operation without a Tact loss while a surface of a member to be applied can be less damaged. An adhesive application member (2111) having a screw portion (2122) inserted therein is rotated by a rotating device (230), so that a nozzle stopper (2114) of the adhesive application member is prevented from interfering with a wiring pattern on a face of a circuit board. Moreover, the screw portion is rotated synchronously as well when the adhesive application member is rotated, thereby preventing the adhesive from being discharged out from the nozzle in consequence to the rotation of the adhesive application member. An application diameter can hence be uniformed.

Abstract: In the case where multiple slide hopper is used for simultaneous multilayer bead coating of photosensitive material, streak defect is occasionally cause, particularly in the case of coating photothermographic material, especially when the outermost layer includes materials capable of increasing optical density such as toner it more frequently happens. It is found that streak defect is restrained when meniscus curvature of upper side bead becomes less than 7.2 mm−1. This condition can be kept by selecting a proper value of clearance between the web surface and the lip of the slide hopper, that is from 0.10 mm to 0.40 mm, and a proper value of pressure in a lower side of the bead, that is from −100 Pa to −700 Pa.

Abstract: The invention pertains to a coating apparatus and method in which most of the relative movement between a dispensing head and the substrate to be coated is provided by the coating head. The moving head configuration reduces the system footprint and diminishes leveling problems. A powered shuttle mechanism carries a dispensing head above a substrate to be coated while riding on a bearing located underneath the chuck holding the substrate thereby providing rigidity and reducing the system footprint. Chuck support is designed to accommodate anticipated vertical sag in the dispensing head by supporting the chuck at points along its periphery thereby permitting the chuck to sag in conjunction with the dispensing head. The shuttle mechanism is equipped with means for automatically adjusting the height of the dispensing head with respect to substrate to compensate for substrate placement error, substrate dimensional variation, and mechanical drift in the mechanical machine parts.

Abstract: The present invention relates to an automatic machine and an automated procedure for the extrusion and application of sealant onto the lateral walls of a spacer frame for insulating glass, mainly of rectangular shape yet not ruling out shapes differing from rectangular with the introduction of a specific option. An essential feature of the machine consists in that the “spacer frame”, which always results as being suspended, requires neither resting nor running bases and therefore the surfaces which have been spread with sealant will never be contaminated by any other agent.

Abstract: According to the invention, different coloured and/or different types of flocks (8, 9) are applied to cover or flock-coat profiled joints or other profiled sections (11) in predetermined areas in a coating station (3) at the very moment when the required holes and separating cuts are made in the cutting and drilling station (4). The flock cabin (10) is divided up in to partial cabins (15, 17, 19) by means of partitions (16, 18) which can be displaced in a corresponding manner towards the profiled section (11) or brought tightly against it. Instead of the above-mentioned partitions (16, 18) or in addition to the partitions (16, 18), axially separating partitions (29, 30) extending in a longitudinal direction of the profiled section (11) are provided. The inventive method enables various coating areas (35, 36, 37) to be obtained on one single profiled section. This makes it possible, for instance, to adapt precisely defined areas, e.g., joint elements in a car body, to the colour of the car or fittings.

Abstract: A pasting machine is provided for paste of an active material for a lead battery which is capable of continuously applying stably and favorably, not only a paste of active material for a negative electrode, but also a paste of active material for a positive electrode, to a continuous substrate. There is arranged within a hopper 1 a pair of front and rear paddles 2,2 located above, a delivery roller 3 located below, a vaned roller 5′ located at a rear side of the intermediate portion, and an auxiliary roller 4 located diagonally to the upper front of the delivery roller 3 spaced from and opposed to the delivery roller 3. A delivery opening 6a of an orifice plate 61 fixed to the lower end of the hopper 1 is made open to direct paste in the same direction as the travel direction of a continuous, substrate A.

Abstract: To control the distance between an adhesive application device and a joining surface during the application of a bead of adhesive, the distance between the application nozzle and the joining surface is measured with the aid of a contactless measurement method, and application nozzle and joining surface are moved with respect to one another in such a way that the distance measured value lies within a predetermined, adjustable range of values.

Abstract: A coating apparatus and a coating method are provided capable of adjusting the coating conditions into optimum and producing stabilized coating film continuously. The coating apparatus comprises a backing roll 2; a coating color delivery slit 4; a gas chamber 10, disposed upstream to the coating color delivery slit 4, containing therein a gas injection nozzle 9 and a pressure sensor 7; a gas recovery chamber 14 disposed upstream to the gas chamber; a nozzle group 20 disposed upstream to the gas recovery chamber 14; and a pressure control device for controlling the pressure inside of the gas chamber within a predetermined pressure range based on the detection results of the pressure sensor.

Abstract: In a coating apparatus, a nozzle connects a feed pipe for feeding a coat solution to a manifold of a die with an opening of the manifold. The nozzle satisfies conditions: 1.5≦B/A≦5.0 and 0.8≦C/B≦8.0, when A is an equivalent diameter of an end of the nozzle to be connected with the tube, B is an equivalent diameter of another end of the nozzle to be connected with the opening, and C is a length of the nozzle. The coat solution fed from the feed pipe enters in the nozzle. In the nozzle, the coating solution diverges along with an inner wall of the nozzle to enter into the manifold. In the manifold the coating solution flows in a widthwise direction and flows out through a slit extending from the manifold to a lip of the die, such that a moving web is coated with the coating solution uniformly.

Abstract: The present disclosure relates to an extruder head for applying a coating of material on a communications medium. The extruder head comprises an extruder head housing having an entrance end, an exit end, and an interior passage that extends from the entrance end to the exit end. A capsule is disposed within the extruder head housing in its interior passage and is pivotally mounted therein at a central portion of the capsule. Disposed within an interior passage of the capsule is a die which is axially aligned with the central portion of the capsule.

Abstract: An apparatus for applying a chemical foam to a traveling substrate in which a plurality of shut-off valves are spaced along a foam conduit between a foam generator and an applicator head to form the conduit into isolated sections when the valves are simultaneously closed upon stoppage of the traveling substrate, thereby maintaining pressure differential along the length of the conduit in readiness for resumption of operation when the substrate resumes travel and the valves are opened. To avoid decomposition of the foam in the applicator head during stoppage, a small by-pass conduit is connected to the valved conduit upstream and downstream of the valves to allow a small quantity of foam to continue to flow to the applicator head during stoppage of the substrate. A discharge valve at a discharge outlet of the applicator head opens during substrate stoppage to allow foam to discharge from the applicator head and maintain circulation of foam therein.

Abstract: A filament coating apparatus comprising a frame including a first filament holding fixture and a second holding fixture for releasably securing a filament adjacent to an extrusion coating fixture also attached to said frame. The extrusion coating fixture comprises a guide rod, a carriage movably mounted on the guide rod, and a coating head including an opening for directing a curable coating composition to a filament positioned in a channel formed in the coating head. A radiation source is aligned to the coating head for radiation curing of the curable coating composition applied to the filament. Both the coating head and the radiation source are joined to the carriage to move relative to a portion of a filament during application of curable coating composition to its surface.

Abstract: A process and apparatus, including a separate coating head, for coating a strip article with a coating material. The process involves coating a strip article with a film of coating material by passing the strip article through a coating apparatus having at least one floating coating head provided with a coating face facing and extending laterally across a surface of the strip article to be coated. The coating head exudes a coating material and floats on the coating material as it meters the coating to a film of the desired thickness. The coating face of the coating head has a preferred coating profile between its opposite ends, and wherein distortions of the preferred coating profile during coating of said strip article are substantially prevented by modifying heat flux to or from selected parts of the coating head to compensate for distortions caused by differences of temperature within the coating head. The apparatus provides means of modifying heat flux to prevent such distortions of the coating profile.

Abstract: A control system for assisting in applying a uniform layer of liquid to a substrate. The control system monitors a fluid pump advantageously integrated directly with an extrusion head. The pump receives the material to be deposited from a remote reservoir and controls dispersion of fluid to the extrusion head. The pump dispense rate is controlled by hydraulic pressure selectively applied by a flow control motor. The control system ensures that a steady-state flow of the liquid is maintained while preventing transient perturbations during initial extrusion startup.

Abstract: An applicator for one of direct and indirect application of a coating medium onto a traveling fiber material web includes at least one dosing device and a coating edge delimiting device. The at least one dosing device includes a pair of lips with each lip having a free end adjacent the fiber material web and extending transverse to a direction of travel of the fiber material web. Further, the lips define a dosing slot therebetween. The dosing slot is an open-jet nozzle and has two side edges. The coating edge delimiting device includes at least two coating edge delimiting elements fitted between and in direct contact with each of the lips. The coating edge delimiting elements close off and substantially seal the dosing slot on the side edges, thereby substantially sealing the dosing slot. Each coating edge delimiting element has a wall section extending beyond the free ends of the lips in a flow direction of the coating medium through the dosing slot.

Abstract: An apparatus applies a coating composition consisting of a resin and fine abrasive particles like corundum particles, to a paper web by feeding the composition to the paper web as it loops around a guide roller to a metering roller juxtaposed with the guide roller. The coating composition, which may develop stripes, is then equalized with a structured roller engaging the paper-web pass leaving the guide roller and formed with at least one thread-like structuring element which may be followed by or preceded by a doctor blade arrangement or a smooth-surfaced roller.

Abstract: The invention pertains to a device for the two-dimensional application of free-flowing adhesive to strip material, especially to furniture edge banding, which material is in motion relative to the device, with an adhesive channel in the applicator head (2), with an applicator valve for the selective blocking or release of the flow of adhesive in the adhesive channel, and with a slot nozzle (16) communicating with the adhesive channel, which nozzle has a slot and an elongated, slot-shaped exit opening (18) for dispensing adhesive onto the strip material.

Abstract: A web is coated by passing it in a horizontal web travel direction beneath a slot nozzle extending transversely of the direction. A pigment-carrying liquid is ejected at a flow speed from a slot of the nozzle to form a downwardly free-falling curtain extending across the web. A vertical inner face of a guide element is oriented at each outer edge of the curtain with each face extending from a respective end of the slot downward to adjacent the passing web. An upper region of each of the inner faces is fed is to a respective partial stream of the liquid such that the partial streams flow down the respective inner faces at a speed at least equal to the curtain flow speed and merge with the outer edges of the curtain.

Abstract: An apparatus for applying liquid of a pasty application medium to a moving web includes a curtain applicator unit, which discharges the application medium onto the web as a curtain or veil which moves substantially under the force of gravity, and a device which at least prevents complete coverage of at least one of the edge strips of the web over a predetermined width. According to the invention, this device deflects the at least one edge strip out of the plane of the web, at least in the area of the curtain applicator unit.

Abstract: An upper die unit (37) and a lower die unit (39) are disposed in opposition, with a gap, to a substrate (31) being conveyed, and provided with coating agent supply flow paths (97, 99) which have inlet paths (103, 105) for a coating agent to flow in and delivery ports (101, 102) for delivering the coating agent to coat the substrate (31) therewith. An accumulation piece (119, 121) installed in a flow path part (97b, 99b) of each die unit (37, 39) moves in the direction in which it goes away from the flow path part (97b, 99b), drawing in the coating agent, dwelling the delivery of the coating agent from the delivery port (101, 102), forming a non-coated part (F), and repeats a reciprocating action, repeating a coating and non-coating. An elastic plate (355) on a way of the coating agent supply flow path (339) is displaced in accordance with advance/retreat actions of a piston member (363) caused by a rotation of a cam (387).

Abstract: The curtain coating apparatus of the invention comprises a sliding face on which a coating solution flows down, a coating width regulating plate which is located on each of both sides of the sliding face and regulates the width of the flow of the coating solution, and an edge guide which is connected to the width regulating plate, and keeps both side edges of free falling stream of the coating solution from the sliding face, wherein a contact angle of water with the coating width regulating plate is greater than a contact angle of water with the edge guide, and the apparatus has solved problems of streaks and uneven thickness at side end portions of a free falling film caused by contraction and teapot phenomenon (residence), by changing wett properties at a coating width regulating plate and an edge guide.

Abstract: A coating apparatus (10) has a coating head having a front edge surface (11) and a doctor edge surface (12). The coating head of the coating apparatus (10) is pressed onto a flexible support (100) laid and running between pass rollers (101) so that the support (100) can be coated with coating composition. The doctor edge surface (12) of the coating apparatus (10) is formed so that the variation rate, in the support width direction, of blade thickness in the support running direction of the doctor edge surface (12) does not exceed 5%.

Abstract: A coating head, and coating apparatus and methods using the coating head, for applying a solvent free coating material to a strip article advancing longitudinally in a coating line. The head includes a die having a transverse slit through which the coating material is deposited on the strip surface and having a land portion with an extended land surface on the exit side of the slit, the die being supported for movement normal to the strip surface, and one or more air or hydraulic cylinders exerting a load on at least the land portion of the die to urge the land surface toward the strip, wherein the die is constituted of a main body and the land portion, and the land portion is so connected to the main die body as to be capable of flexing relative to the main die body in a direction normal to the strip surface but to resist flexing in the direction of strip advance in the coating line.

Abstract: A coating head discharges the coating solution in a discharging direction through a slit to a support and is designed such that a slit has a length M (mm) along the discharging direction and a gap G (mm), and a manifold has a coating width L (mm) orthogonal to the discharging direction, a cross sectional area S (mm2) and a circumferential length R (mm) of a cross section, wherein the coating head and the supplying means are arranged such that the coating solution is supplied symmetrically in terms of the center of the coating width of the manifold through the feeding port into the manifold, and dimensions of the coating head are determined to satisfy formula (1): 10−4<(L2R2G3)/(24MS3)<10−2  (1)

Abstract: The invention relates to a device for applying a coating substance to a continuous paper web in a process for producing abrasion-resistant laminates for manufacturing decorative paper. The coating substance consists of a viscous mixture of melamine resin and alphacellulose to which particles of corundum are added, and is applied to the visible surface of the paper. The inventive device includes a deflector roll (2) on which the paper web (1) lies in an area in which it loops around; a metering roll (6) which is arranged parallel to the deflector roll (2) and forms the boundary of a gap with the same, and which is driven synchronously or almost synchronously with the deflector roll; a slit nozzle (7) for applying the coating substance either directly to the paper web (1) on the deflector roll (2) or to the metering roll (6); and a doctor blade of a rectangular piece (9) of flexible rubber type material.

Abstract: In the case where multiple slide hopper is used for simultaneous multilayer bead coating of photosensitive material, streak defect is occasionally cause, particularly in the case of coating photothermographic material, especially when the outermost layer includes materials capable of increasing optical density such as toner it more frequently happens. It is found that streak defect is restrained when meniscus curvature of upper side bead becomes less than 7.2 mm−1. This condition can be kept by selecting a proper value of clearance between the web surface and the lip of the slide hopper, that is from 0.10 mm to 0.40 mm, and a proper value of pressure in a lower side of the bead, that is from −100 Pa to −700 Pa.

Abstract: The coater apparatus enclosure encloses the entire die of a coating apparatus includes an enclosure structure, a saturation station which saturates a supply gas with solvent, a device which supplies solvent-saturated gas to the enclosure to continuously purge the enclosure, and a device which controls the gas flow to the enclosure. The saturation station could include a heated jacketed vessel and a porous metal bubbler, or it could include a series of heat exchangers. No streaks can form due to coating fluid drying on the die lip because the gas supplied to the die enclosure is saturated with the solvent.

Abstract: A coating method has running step of running a nozzle and/or a base material, change step of changing discharge-port slit widths of said nozzle, and coating step of discharging a coating solution from said slit and coating said base material with said coating solution; wherein said running step, change step, and coating step are executed by combining them.

Abstract: A liquid chemical treatment apparatus includes a coating apparatus for applying a coating liquid such as resist onto the surface of a substantially planar substrate such as a glass substrate. The coating apparatus includes a nozzle with an elongate injection outlet such as a slit with a width substantially the same as that of the substrate, and a liquid circulating passage connected to the nozzle for supplying the coating liquid to the nozzle. Mechanisms are provided with the circulating passage and the nozzle to remove air from the liquid, and to maintain the circulating liquid at a substantially constant temperature and a substantially constant flow rate.

Abstract: A coating method of coating an outer circumferential surface of a cylindrical base with a coater having a supply port, a coating solution chamber, and a slit communicating with the coating solution chamber, the slit being provided around an inner circumferential surface of the coater, comprisse steps of: feeding a coating solution from the supply port to the coating solution chamber so that the coating solution is discharged to the slit; adjusting an absolute pressure P in the coating solution chamber so as to satisfy the following formula: 3×104≦P≦3×106 (mmH2O) and relatively moving the cylindrical base through a hole formed by the inner circumferential surface of the coater so that an outer circumferential surface of the cylindrical base is uniformely coated with the coating solution flowing out from the slit.

Abstract: An extrusion coating head comprises an upstream side block (12) and a downstream side block (13) aligned in the conveying direction, and adjusting mechanism. The upstream and downstream side blocks (12, 13) respectively have edge surfaces (12a, 13a) on which the flexible support (1) is pressed. The upstream and downstream side blocks (12, 13) define therebetween a slit (15b) through which a coating composition can be extruded and applied onto the flexible support. The adjusting mechanism adjusts a length (t) of a perpendicular line which is drawn from an upstream end (A) of the edge surface of the downstream side block to a tangential line (L) of the edge surface of the downstream side block which is drawn from a downstream end of the edge surface of the upstream side block, to thereby adjust a distribution of a coating thickness on the flexible support in the width direction.

Abstract: An extrusion die for extruding an extrudable fluid comprises a distribution channel having a discharge mouth, and a dynamic flow inducer disposed therein. The dynamic flow inducer comprises a movable member, such as, for example, a rotatable bar disposed transversely relative to the flow of the fluid through the discharge mouth. As the extrudable fluid is passing through the discharge mouth, the motion of the dynamic flow inducer retards the accumulation of contaminant and thereby prevents clogging of the extrusion die.

Abstract: A method for coating lamp tubes in which a local drying zone tracks a liquid level of the coating material at a constant time interval. The local drying zone may be a heater or air outlet that moves in coordination with the liquid level.

Abstract: Apparatus and method for depositing controlled short intervals of electrostatic charge on a moving web substrate to be coated, including a mathematical model that estimates the charging performance of the apparatus. The model is constructed via benchtop characterization of the apparatus. The model is implemented in coating production via an algorithm comprising a best-fit equation representing the model predictions over a range of relevant input parameter values such as web speed, web capacitance, and desired web voltage. The apparatus includes an electrical charging apparatus, a power supply for powering the charging apparatus, and a controller programmed with the algorithm for automatically setting and controlling the intensity and duration of the output of the power supply to yield the optimal electrostatic potential on the charging apparatus. In operation, run-specific variables including web type and coating speed are also provided as inputs to the controller.

Abstract: A novel apparatus for compressing viscous material through openings in a stencil is disclosed. The novel apparatus has a compress on head cap which provides a contained environment to direct and to aid the flow of pressurized viscous material through the openings in the stencil. In another embodiment of the invention, the compression head includes a viscous material reception chamber which has a certain shape which is effective to cause said received viscous material to be selectively dispensed while having a substantially uniform velocity profile and which further provides for the creation of a substantially uniform pressure profile.