Abstract:
A slurry distribution system can include a feed conduit and a distribution conduit in fluid communication therewith. The feed conduit can include a first feed inlet and a second feed inlet disposed in spaced relationship thereto. The distribution conduit can extend generally along a longitudinal axis and include an entry portion and a distribution outlet in fluid communication therewith. The entry portion is in fluid communication with the first and second feed inlets of the feed conduit. The distribution outlet extends a predetermined distance along a transverse axis, which is substantially perpendicular to the longitudinal axis. The slurry distribution system can be placed in fluid communication with a gypsum slurry mixer adapted to agitate water and calcined gypsum to form an aqueous calcined gypsum slurry.
Abstract:
There is provided a coating method for forming a coat having a less unevenness in its thickness on a sheet-like substrate. In the method in which a coating liquid is continuously supplied from a supply head to a surface of a continuously traveling sheet-like substrate to form a coat while controlling its thickness by a coating bar disposed above the sheet-like substrate, the coating liquid of which amount corresponds to an amount required for forming a predetermined coat thickness is continuously and constantly supplied to the surface of the sheet-like substrate, and the coating bar is moved up and down on the basis of increase and decrease in an amount of a holdup of the coating liquid which is formed just near the coating bar, so that the coat is formed.
Abstract:
A method of and an apparatus for coating a substrate with a polymer solution to produce a film of uniform thickness, includes mounting the substrate inside an enclosed housing and passing a control gas, which may be a solvent vapor-bearing gas into the housing through an inlet. The polymer solution is deposited onto the surface of the substrate in the housing and the substrate is then spun. The control gas and any solvent vapor and particulate contaminants suspended in the control gas are exhausted from the housing through an outlet and the solvent vapor concentration is controlled by controlling the temperature of the housing and the solvent from which the solvent vapor-bearing gas is produced. Instead the concentration can be controlled by mixing gases having different solvent concentrations. The humidity of the gas may also be controlled.
Abstract:
A method of and an apparatus for coating a substrate with a polymer solution to produce a film of uniform thickness, includes mounting the substrate inside an enclosed housing and passing a control gas, which may be a solvent vapor-bearing gas into the housing through an inlet. The polymer solution is deposited onto the surface of the substrate in the housing and the substrate is then spun. The control gas and any solvent vapor and particulate contaminants suspended in the control gas are exhausted from the housing through an outlet and the solvent vapor concentration is controlled by controlling the temperature of the housing and the solvent from which the solvent vapor-bearing gas is produced. Instead the concentration can be controlled by mixing gases having different solvent concentrations. The humidity of the gas may also be controlled.
Abstract:
The invention relates to a method of producing a product comprising a support having a long-acting adhesive and a protective tape disposed thereon, so that said adhesive can be used at a later time. The inventive method is characterised in that it consists in: determining a reference plane (P) which is close to the location of the adhesive deposit and which is either below the plane containing the lower face of the support or above the plane containing the upper face of said support; establishing the distance (D) separating the reference plane (P) and the level (N) at which the adhesive (2) is delivered, which is close to the plane containing the application face of the support; delivering the long-acting adhesive (2); delivering a protective tape (20) which is disposed on top of the adhesive (2) either simultaneously using a prefabricated transfer tape or separately; moving the support in relation to the deposit station; exerting a transverse force on the support such that one of the faces thereof is applied continuously against the reference plane (P); and exerting a pressure, counter to the transverse force, on the protective tape (20) and the adhesive (2).
Abstract:
An adhesive applicator for a core-making machine is provided with an applicator plate for applying adhesive to a web. The applicator plate has upstream and downstream faces and a bottom surface which extends from the upstream face beyond the downstream face. The bottom surface is adapted to spread adhesive on a moving web below the bottom surface. The bottom surface forms a narrow wedge-shaped portion with an upper surface which extends away from the downstream face.
Abstract:
A coating station, which in intended for coating a web with a coating material, includes a load-bearing and cross-directional frame extending substantially across the entire width of the web. The coating station also includes applicator elements supported to the frame. The frame is arranged by at least one cross component formed out of sheet metal into a box-type structure, the cross component extending substantially across the entire width of the web. The cross component is attached to the end components by its end parts.
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. 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.
Abstract:
The present invention relates to an apparatus for producing a transversely aligned web having filaments aligned in the transverse direction, comprising conveyor running in one direction, spinning nozzle disposed above the conveyor, an annular primary airflow nozzle, and at least one pair of secondary airflow nozzles disposed on the upstream side and the downstream side of the running direction of the conveyor.
Abstract:
An improved method and apparatus for coating semiconductor substrates with organic photoresist polymers by extruding a ribbon of photoresist in a spiral pattern which covers the entire top surface of the wafer. The invention provides a more uniform photoresist layer and is much more efficient than are current methods in the use of expensive photoresist solutions. A wafer is mounted on a chuck, aligned horizontally and oriented upward. An extrusion head is positioned adjacent to the outer edge of the wafer and above the top surface of the wafer with an extrusion slot aligned radially with respect to the wafer. The wafer is rotated and the extrusion head moved radially toward the center of the wafer while photoresist is extruded out the extrusion slot. The rotation rate of the wafer and the radial speed of the extrusion head are controlled so that the tangential velocity of the extrusion head with respect to the rotating wafer is a constant.