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: An apparatus installed in a molten metal plating line includes a blade pressed against a roll dipped in a molten metal plating bath, in which a metal strip travels. The apparatus removes substances deposited on a surface of the roll. The apparatus also includes an arm for supporting the blade, and a screw member disposed above the plating bath so as to traverse it and moving along an axis of the roll in the bath for removing substances deposited on the roll in the molten metal plating bath. Floats and/or weights are mounted on the arm so as to adjust a press force of the blade applied to the roll in the molten metal plating bath. A method for preventing the occurrence of dents on a molten-metal-plated steel strip using the apparatus is also disclosed.

Abstract: “Ghosting” and leakage problems in a doctor blade assembly are minimized or eliminated in a construction that includes a reservoir (10) partially surrounding a transfer roller (12) wherein a surface of the roller (12) is within the reservoir (10) for at least 180° of its rotation. The reservoir (10) is desirably split into two segments (50), (52) which are mounted for relative movement so as to allow access to the interior of the reservoir (10) as well as to the roll (12). Chambered end plates (82), (84) house seals (10) and receive parts (144) of the ends of doctor blades (40), (42) which extend past the end (142) of the roll (112) to promote good sealing at the ends of the assembly.

Abstract: An apparatus for doctoring a roll surface including a pivot bar adapted to be mounted on a doctor back and which the pivot bar defines an upwardly projecting fulcrum. A first shelf projects forwardly beyond the fulcrum and a top plate pivotally supported on and projecting forwardly beyond the fulcrum overlies the first shelf. The top platen is held downwardly against the fulcrum. Blade support members are carried by and cooperate with the top plate to define forwardly open slots, which slots are configured and dimensioned to receive a rear edge of a forwardly projecting doctor blade. The blade support members have rearwardly projecting second shelves underlying the first shelf and a loading mechanism is interposed between the first and second shelves for pivoting the top plate on the fulcrum in a direction urging the doctor blade against the roll surface.

Abstract: An apparatus for application of a liquid or pasty coating medium onto a substrate moving past it, for instance a material web of paper, cardboard or boxboard or an applicator roll, includes a back-up chamber which is bounded on its substrate entrance end by a back-up chamber entrance bounding element and on its substrate exit end by a back-up chamber exit bounding element. The apparatus also includes a feed device for feeding the coating medium. In the applicator according to the invention for achieving a uniform coating application, the feed device, viewed in the direction of travel of the substrate, is arranged before the back-up chamber entrance bounding element.

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 doctor blade for direct contact with a ceramic roll surface. The doctor blade includes a strip of metallic carrier material, which, along one edge section is provided with a ceramic coating. The ceramic coating on the blade has a hardness ranging from approximately 850 to 950 microvickers, thereby substantially increasing wear resistance of the blade without substantially increasing wear on the ceramic roll surface for which the blade is adapted for use.

Abstract: A novel apparatus for compressing viscous material through openings in a stencil is disclosed. The novel apparatus has a compression head cap which provides a contained environment to direct and to aid the flow of pressurized viscous material through the openings in the stencil. The compression head cap further includes a plurality of members which are selectively and movably disposed within the contained environment and which selectively remove an amount of the material from the environment, effective to prevent the material from being undesirably dispensed by the head cap.

Abstract: The invention is directed to a method for the application of a liquid or pasty medium onto a traveling fiber material web. The medium is directly applied on at least one side of the traveling material web. The medium is pressed into the traveling material web after the medium is directly applied on the traveling material web.

Abstract: An apparatus for direct or indirect application of a liquid or pasty coating medium onto a traveling material web, notably of paper or cardboard, includes at least one oblong working unit wetted by the coating medium and an oblong support element carrying the working unit. The at least one working unit and the support element are thermally shielded from one another. The at least one working unit and the support element are joined to one another by way of an elongation compensation system.

Abstract: A portable and table mounted, wall paper pasting apparatus. The apparatus includes a housing containing a trough for receiving and transferring paste to the back side of wall paper. The housing features a removable wall containing a manually adjustable squeegee to control and distribute the paste onto the wall paper.

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.

Abstract: A portable and table mounted, wall paper pasting apparatus. The apparatus includes a housing containing a trough for receiving and transferring paste to the back side of wall paper. The housing features a removable wall containing a manually adjustable squeegee to control and distribute the paste onto the wall paper.

Abstract: A chambered doctor blade apparatus provides an automatic system for cleanup and replacement of ink or coating substance, as well as operating a hydraulic head loading system that includes hydrostatic compensation, and integrates the head loading mechanism into the automated cleaning, flushing and replacement cycle. A supply pump, a return pump, and a plurality of lines are connected by electrically operated valves. A programmable logic controller (PLC) is connected through a display driver to a touch screen display that presents an interactive graphical user interface for control purposes. The PLC is programmed to carry out sequentially the required steps for cleaning, refilling, and running the chambered doctor blade assembly. The PLC is connected to each of the pumps and valves, and to the head loading valve of a hydrostatically compensated hydraulic head loading system.

Abstract: A metering system for the coating of webs of paper and cardboard uses a doctor bar received in an elastic bed which is urged toward the surface to be coated by a pressurizable bladder subdivided into compartments. An elastic continuous member between the diaphragm and the bed equalizes the pressure so that sudden changes in pressure in the regions between the compartments are eliminated.

Abstract: A process of producing an elongated coated strip article having a layer of coating material on each opposite surface of the strip article, in which the ratio of layer thicknesses on opposite sides of the strip article may be set or varied. The process comprises simultaneously applying layers of solidifiable liquid coating materials on the opposite sides of the strip article by advancing the strip article in a direction along a path between opposed coating heads, at least one of which is a floating coating head, having material delivery slots and metering lands for delivery and metering of the liquid coating materials to the opposite surface to form the layers. The ratio of the layer thicknesses may be adjusted when required by varying the path of strip article advance between the floating coating heads to cause changes in angles formed between the strip surfaces and adjacent metering lands on opposite sides of the strip article. The invention also provides apparatus for carrying out the process.

Abstract: An apparatus for doctoring a moving surface includes a blade holder component extending longitudinally across the moving surface and carrying a doctor blade. A support component is parallel to and supports the blade holder component. A first operating mechanism rotatably urges the doctor blade in a doctoring direction into contact with the moving surface, resulting in the doctor blade being acted upon by a reactionary thrust force in the plane of the doctor blade and a reactionary rotational force in a direction opposite to the doctoring direction. A pair of mutually opposed parallel guide rails are provided on one of the components, and rotatable rollers are spaced along the length of the other of the component.

Abstract: An improvement to a corner-box drywall taping tool. It uses a housing similar to the existing tools. This housing has a quick release spring-loaded one-way valve attached to the mud area of the tool. One a roll of tape is installed; the unit is attached to a mud pump by the quick release fitting. A pump then fills the housing with mud in about 20 seconds. To prevent the case from opening under the pressure of the pump, additional latches are required to seal the housing. When the mud is exhausted with this device, the operator returns to the mud pump, attaches the fitting to the pump and in another 20 seconds is ready to go. This process can be repeated until the tape supply is exhausted. In this way, the device saves a lot of time during the filling process.

Abstract: A loading hose for use in a paper machine doctor or coating device, which loading hose is located between the doctor's or coating device's blade support and rotatably arranged blade holder, is arranged to load the doctor blade of the doctor or the coating blade of the coating device. The loading hose incorporates a flexible casing, which is pressure-resistant and of a uniform cross-section. The loading hose includes at least one stiffening member attached to the casing and arranged to lie against either the blade support or the blade holder.

Abstract: A beam structure (10) made of a composite for a pulp machine/paper machine/board machine or for a paper/board finishing device. The beam (10, 10a1, 10a2) is formed of a first curved part (12) and of a second straight part (13) joined thereto, to which second straight part (13) a doctoring, coating or measurement apparatus (110) is attached.

Abstract: A novel apparatus for compressing viscous material through openings in a stencil is disclosed. The novel apparatus has a compression 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 selectively expandable diaphragm and viscous material reception and dispensation apertures. The viscous material reception aperture is formed in close proximity to the material dispensation aperture and this aperture placement to allow the viscous material to be selectively dispensed with a substantially uniform velocity and pressure profile. In another embodiment, the compression head includes a selectively expandable diaphragm which further increases the uniformity of the velocity and pressure profiles.

Abstract: An apparatus for coating a paper or paperboard web with at least two coat layers. The present invention achieves two-layer coating and is capable of providing a smooth coat with high opacifying power. A first coat layer is initially applied to the web. The surface of this first coat layer is smoothed by a smoothing element. After smoothing, this first coat layer is partially or entirely dried, and a second coat layer is applied onto the first coat layer using a transfer coater.

Abstract: The invention provides an electrode forming method with steps of arraying chip-style electronic components on an arraying flat bed thereby positioning and aligning the components, lowering a film coated with an adhesive in relative manner together with an adhering top plate parallel to the arraying flat bed thereby adhering ends of the positioned and aligned chip-style electronic components to the adhesive, then lowering the first film to which the chip-style electronic components are adhered in relative manner together with a coating top plate parallel to a coating flat bed provided with a conductive paste layer of a constant thickness thereby pressing the other ends of the chip-style electronic components to the coating flat bed and coating the ends of the electronic components with the conductive paste.

Abstract: A stripe coating applicator for coating at least two stripes having a plurality of slit outlets provided at a nozzle edge and a pair of block edges forming said slit outlets. Stripe partitions partition and define the plurality of slit outlets formed at the pair of block edges. Notches are formed on at least one of said block edges toward a direction of the coating fluid to be discharged and correspond to the positions of the stripe partitions. Movable parts are formed at the at least one of said block edges where the notches are provided. The notches and thin parts form the movable parts. A slit gap adjustment means is provided for adjusting slit gaps by moving the movable parts.

Abstract: A wear-resistant surface is formed on a component formed of an AlSi alloy by using a thermal spraying or a laser beam treatment. A thermally conductive device is brought into a thermally conductive contact with the component so that the thermally conductive device touches the component during the step of forming the wear-resistant surface. The thermally conductive device is actively cooled.

Abstract: A coating machine for the application of a coating medium onto a moving surface includes a counter-force generating device which generates a counter force that opposes the force generated by a load device.

Abstract: A method and apparatus for coating a paper or a paper board web, comprising spreading coating mix having a solids content of 55-75% on the surface of the web with a nozzle applicator, levelling and metering the spread coating mix on the surface of the web by a doctor element capable of producing a high hydrodynamic force on the coating layer between the doctor element and the web, the doctor element being located downstream of the applicator so that the dwell time between the spreading of the coating mix to the metering is 72-2400 ms. The web speed is preferably 100-1000 m/s. A good smoothness and coverage is achieved by this method due to long dwell time.

Abstract: A method and apparatus for producing paperboard, the method comprising the steps of applying a coating mix layer having a thickness greater than that of the final coat thickness to the surface of the web being coated using a coating mix formulation in which the solids content is at least 55%, passing the web with the coat applied thereto to a doctor blade located downstream in the travel direction of the web at a distance from the applicator apparatus such that the dwell time from the application step of the coating mix to the doctoring step is at least 130 ms, and smoothing the coat layer to its final thickness by means of a doctor blade. By this method a smooth surface can be obtained even on high coat weights.

Abstract: The present invention relates to an apparatus for controlling the placement of a curable, shear-thinnable polymer composition into a porous web. The apparatus comprises means for applying tension, means for applying the polymer composition to one surface of the tensioned web, and means for shear thinning the composition and placing it into the web to encapsulate at least some of the structural elements of the web, leaving most of the interstitial spaces open. A preferred apparatus includes one or more process heads that has mounted thereto a rigid knife blade for engagement with the web. The knife blade is movable vertically and rotationally. The process head is also movable horizontally along the path of the web. The invention also relates to an apparatus for selectively placing the polymer composition in a substantially continuous region extending through the web so that the polymer composition fills the interstitial spaces and adheres adjacent structural elements of the web in the region.

Abstract: A novel apparatus for compressing viscous material through openings in a stencil is disclosed. The novel apparatus has a compression head cap which provides a contained environment to direct and to aid the flow of pressurized viscous material through the openings in the stencil.

Abstract: This invention is an improved apparatus and method for distributing ink in a printing press. In preferred embodiments, ink on an anilox roll is uniformly distributed on the roll by the scraping action of doctor blades against the roll surface. The blades are held in continuous engagement against the anilox roll by an adjustment mechanism which exerts a constant force against the doctor blades. The preferred adjustment mechanism is a cam or cams under the control of an actuator. The actuator causes each cam to rotate against a moveable support on which the doctor blades are mounted urging the doctor blades against the anilox roll. The actuator provides a constant force to each cam thereby causing the blades to be constantly urged against the anilox roll surface even as the blades are worn away by operation of the printing press.

Abstract: Coating is applied from a coating application chamber to a moving web or backing roll by a rotating premetering rod, a curved or straight wedge, or a premetering blade which is urged against the moving substrate by a plurality of profiling mechanisms which are spaced from one another in the cross machine direction to control the cross machine direction profile of the applied coating to avoid coating streaks. The profiling mechanisms may be hydraulic actuators, machine screws or thermal expansion driven pistons. Cross machine profiling of the premetering device allows control with minimum pressure on the web. Adjustments to the premetering device are only made where necessary to correct nonuniform coating application where detected.

Abstract: In a device for direct or indirect single or double sided application of a liquid or viscid coating medium onto a moving surface with a scoop roll, a nozzle applicator device is positioned prior to the scoop roll relative to the direction of travel of the moving surface.

Abstract: A device for leveling and/or metering of a layer of liquid or viscous coating medium that has been applied to a moving background includes a leveling and/or metering element, at least one power component for positioning of the leveling and/or metering element against the background, and a power transfer device through which the at least one power component acts upon the leveling and/or metering element. The at least one power component acts upon the power transfer device through at least one spring arrangement.

Abstract: A support beam for at least one long working unit, notably of a paper machine or coater, includes several bundled, long profile elements forming in their entirety the support beam.

Abstract: Device for the application of a coating composition on a traveling web (17) comprising a transfer roll (5), a support roll (3) cooperating with the transfer roll (5), the traveling web being fed in a nip between said rolls, further comprising a gravure roll (7) intended for the transfer of an adapted quantity of the coating composition onto the transfer roll (5), and a device for passing of the web through said nip, characterized by a blade device (11, 13) for the removal of excess of coating composition from the gravure roll (7), said blade device being arranged in trailing position in relation to the moving surface of the gravure roll (7).

Abstract: A sensor and a method for determining the basis weight of a coating material containing latex 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: A sensor and a method for determining the coating weight of a coating material containing silicone on a substrate is described. The determined coating 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 weight.

Abstract: A solid imaging apparatus and method produces an integral three-dimensional object from a multiplicity of cross sectional portions of the object by selectively exposing successive layers of a liquid photoformable composition to actinic radiation. The apparatus includes a vessel for containing the composition so as to present a free surface, and a movable platform disposed within the vessel below the free surface. Part of the composition is transferred above the free surface by lowering and raising a dispenser at predetermined positions located away from the platform. A doctor blade contacts the composition transferred above the free surface, and then moves over the platform to form a substantially uniform layer of the composition.

Abstract: In a method of direct or indirect application of a liquid or viscous coating medium onto a moving material web, specifically a paper or cardboard web, a layer of the coating medium is applied to the material web by use of an applicator unit. The coating result is then checked for deviations from the desired coating result. In the event that such deviations are detected, and in order to correct them, at least one applicator unit operating parameter is adjusted. The adjustment is made within a short time period, and with the material web running, from an initial operating parameter value that is in effect prior to detection of the deviation. Subsequently, the operating parameter is then reset to at least approximately the initial parameter value, whereby the adjustment and the subsequent resetting may be repeated if necessary.

Abstract: A doctoring device for an apparatus designed to apply a liquid or viscid medium onto a moving base surface includes a metering unit having a coater rod and a coater rod bed. The metering unit is attached to the support beam and is positioned so that it can be pressed against the base surface. A pressure-elastic support arrangement is disposed between the coater beam and the coater rod bed. The coater rod bed is supported pressure-elastically by the support beam via the support arrangement in at least two support directions that are perpendicular to each other. The spring rate of the support arrangement is adjustable in at least one of the support directions. A preferred support arrangement includes pressure hoses which are assigned to each of the two support directions. The pressures in these hoses can be adjusted, independently from each other, to a pre-determined level via a pressure source.

Abstract: A coater head for contacting a liquid coating material with a traveling web of paper or fabric. The coater head includes at least two chambers and an extended outflow bubble to increase the zone of contact between coating liquid and the traveling web. Improved, coating quality also results from controlled flow characteristics through the coater head having a feed zone length-to-depth ratio of four or more.

Abstract: A holder is disclosed for applying the working edge of a doctor blade to a moving surface. The holder has upper and lower holder members constructed and arranged respectively to contact upper and lower surfaces of the doctor blade, with the doctor blade projecting forwardly to terminate at its working edge. One of the holder members comprises a composite of sandwiched elements enclosing one or more chambers having forwardly directed outlets. A pressurized fluid is introduced into the chambers for forward application via the outlets and along a surface of said doctor blade onto the surface being doctored.

Abstract: A coat weight control system for applying coating to a paper sheet in a paper machine permits even coating across the sheet with less actuator force needed. The system applies a specified force profile on a coating blade and has a plurality of actuators spaced apart, the actuators each applying a load. A flexible backing bar is positioned on the coating blade having connections there along to the actuators, the backing bar having a plurality of keyhole slots between the connections, the slots spaced apart along the bar.

Abstract: Regarding filling of a paste, a temperature gradient at a paste-pressing face is managed by a heater incorporated in a filling head. Alternatively, a nonvolatile component is applied to a printing face of a base material before the paste is filled, thereby preventing a volatile component of the paste from evaporating with time. Viscosity of the paste is thus maintained. Meanwhile, a change of the quantity of the paste is coped with by changing a moving speed of the filling head or a contact angle of the filling head to the printing face, or by supporting the filling head at the side in touch with the printing face.

Abstract: The invention relates to a method of directly or indirectly applying a liquid or pasty medium to a continuous material web by use of an application unit having at least one applicator, at least one doctor element, and at least one doctor element support at which the doctor element is held and can be pressed at a predetermined pressure against a counter-surface by at least one adjustment movement of the doctor element support. The following steps are usable to set a desired transverse and/or longitudinal profile of the medium to be applied or which has been applied: pressing the doctor element at a predetermined contact pressure against the counter-surface by adjusting the doctor element support into a predetermined adjustment position, and by altering the forces exerted on the doctor element by the medium to be applied or which has been applied, while the adjustment position of the doctor element support is kept constant for a predetermined production range.

Abstract: A device for indirect application of a liquid or viscous medium onto a traveling material web, specifically a paper or cardboard web, includes an applicator device for the application of a layer of liquid or viscous medium onto a surface of a transfer element. The transfer element is in contact with the moving material web and transfers the coating onto the web. A leveling unit is equipped with a leveling element positioned against the material web for smoothing of the coating layer on the material web. The leveling element is mounted rigidly in cross direction to the material web, that is, in a direction substantially orthogonal and in a local material web progression to the direction of travel of the material web.

Abstract: The invention relates to an application unit for directly or indirectly applying a liquid or pasty medium (4) to a continuous material web (6), particularly one made of paper or cardboard, having two gap limiting walls (13, 14) that are spaced apart from one another, are each formed on corresponding lip members (2, 3) and between them define a metering gap (12) for the liquid or pasty medium (4), and having a gap-width adjustment device (8, 9) mated at least with the one lip member (2). There is provided on at least one gap limiting wall (13) an elastic adjustable wall member (7) which can be expanded into the metering gap (12) relative to the gap limiting wall (13), extends across the length of the metering gap (12) and can be actuated by the gap-width adjustment device (8, 9).

Abstract: An apparatus for coating a paper web in which a coating mix is applied onto a paper web using an applicator unit which forms a linear mechanical force on the web against a first backing surface situated on the back side of the web. The coating mix applied onto the web is doctored using a doctor unit acting against a second backing surface. The speed of at least one of the backing surfaces is independently controlled relative to the speed of the first backing surface and the web speed in order to attain control of the tensile stress of the web.