摘要:
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.
摘要:
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.
摘要:
To stably coat a surface of a web with multiple coating liquids containing polyvinyl alcohol (PVA) to simultaneously form multiple layers on the surface of the web by means of a slide-hopper coating apparatus, a polymerization degree of PVA contained in one of the coating liquids forming the bottom layer among the multiple layers is within the range between 1000 and 4000, and a density of PVA contained in the coating liquid forming the bottom layer is at most 4% by weight, and a viscosity of at least one of the coating liquids that forms one of the layers other than the bottom layer is higher than a viscosity of the coating liquid forming the bottom layer. Alternatively, the polymerization degree of PVA contained in the coating liquid forming the bottom layer is within the range between 1000 and 4000, and an additive used to increase viscosity is added to the coating liquid forming the bottom layer within the range between 0.05% and 0.5% by weight with respect to an amount of PVA contained in the coating liquid forming the bottom layer.
摘要:
A running web is coated with a coating liquid containing polyvinyl alcohol by means of a slide hopper that has a slide surface of which the inclining angle with respect to a horizontal plane is within a range between 5null and 30null; a thickness T nullmmnull of the coating liquid on the running web is smaller than a thickness S nullmmnull of the coating liquid flowing down along the slide surface; a bead clearance CL nullmmnull between the end of the slide surface and the running web at the bead part is determined in accordance with the thickness T nullmmnull of the coating liquid on the running web in an inequality, Tnull0.05
摘要:
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.
摘要:
The invention relates to an arrangement for feeding a treatment substance to an application device used to treat a moving paper or board web, which arrangement includes at least one application chamber (1) extending over the width of the web, to which the treatment substance can be fed. The treatment substance feed devices include at least one elongated feed chamber (3) extending over the width of the application device, to which treatment substance can be fed from the inlet side (8) of the chamber (3), and at least one connection (20) for leading the treatment substance from the feed chamber to the application chamber (1). For feeding the treatment substance between the feed chambers, there is at least one flow route to connect the end (19) of the feed chamber (3) opposite the inlet side (8) and the end of the application device on the side of the inlet side of the first feed chamber (3), through the flow route.
摘要:
A binding assembly for a printer includes a support chassis that is mountable to a printer, downstream of a printing zone of the printer. The support chassis defines a glue application and binding zone in which printed sheets of media are received in a feed direction. An elongate glue applicator is mounted on the chassis and is positioned substantially at right angles to the feed direction. The applicator is displaceable towards and away from the sheets of media to apply a strip of glue to a transverse edge of each of said consecutive sheets of media.
摘要:
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. Coating consistency is enhanced using such height adjustment. A part of the apparatus containing the fluid delivery equipment and in communication with the dispensing head may be placed on a cart and removably attached to the rest of the apparatus. There is a utility station comprising equipment for cleaning and priming the dispensing head which may be located on the removable cart. A pump in addition to main remote pumping means may be integrally mounted on the dispensing head to more precisely control fluid flow to the dispensing head. The chuck may be configured to be micro deformable so as to maintain the surface of a substrate upon it at a constant height. Fluid may be dispensed along openings of selected lengths along the length of the dispensing head using die lips attached to the dispensing head or by cutting a plurality of slots in a single dispensing head.
摘要:
A system for applying a fluid coating onto a substrate includes forming a fluid wetting line by introducing a stream of fluid onto a first side of the substrate along a laterally disposed fluid-substrate contact area. An electrical force is created on the fluid from an electrical field (originating from electrical charges which are on the second side of the substrate) that is substantially at and downstream of the fluid wetting line. The electrical field can be generated by charges that have been transferred to the second side of the substrate from a remote charge generator.
摘要:
Since a widely applicable high quality plasma display equipped with a phosphor layer suitable as a highly precise plasma display can be produced continuously at a high productivity level, an industrially advantageous method and apparatus for producing a plasma display can be provided. The highly precise plasma display obtained in the present invention can be widely used in the display field, for example, for wall mounted television sets, information displays, etc. The method for producing a plasma display of the present invention comprises the step of continuously applying a phosphor paste containing a phosphor powder and an organic compound onto a substrate with a plurality of barrier ribs from a paste applicator with a plurality of outlet holes. Furthermore, the present invention comprises the steps of coating a substrate with a plurality of barrier ribs, with three phosphor pastes respectively containing a phosphor powder emitting light of red, green or blue, as stripes in the spaces between the respectively adjacent barrier ribs on the substrate, from a paste applicator with outlet holes, and heating to form a phosphor layer. Moreover, the apparatus for producing a plasma display of the present invention comprises a table for fixing a substrate with a plurality of barrier ribs, a paste applicator with a plurality of outlet holes to face the barrier ribs of the substrate, a supply means for supplying a phosphor paste to the paste applicator, and a moving means for three-dimensionally moving the table and the paste applicator relatively each other.