Abstract:
Apparatus for coating a strip article comprises a coating head having a coating surface and elongated open-sided slot formed in the coating surface communicating with an interior channel for delivery of coating material to said slot for transfer to a strip article to be coated. The slot has a slot extension extending into the coating surface at at least one longitudinal end of the slot for applying coating material to an edge region of the strip article. The slot extension communicates with the interior channel only through a constricted opening that prevents substantial leakage of coating material from the slot extension when the slot extension becomes uncovered by the edge region of the strip article. In this way, the strip article can be coated completely up to its transverse edges, without risk of substantial spillage of coating material if the ends of the coating slot become uncovered by the strip article due to inaccurate tracking or variable strip width.
Abstract:
A die coating method and apparatus includes a die (40) having an upstream bar (64) with an upstream lip (60) and a downstream bar (66) with a downstream lip (62). The upstream lip (60) is formed as a land (68) and the downstream lip (62) is formed as a sharp edge (70). The shape of the land conforms to the shape of the surface being coated. Changing at least one of the slot height H, the overbite O, and the convergence C can improve coating performance. A replaceable, flexible strip (350) can be used above the coating slot to facilitate replacement of a damaged overbite edge. A low surface energy coating can be applied to the downstream bar and land surfaces.
Abstract:
The invention relates to an adhesive application system for applying latex (64) to a secondary backing (52, 54, 74). The latex (64) is supplied to nozzles (62) and can be applied via direct application to backing (52) or indirectly via roller (50).
Abstract:
A linear actuator comprises two flexible, elongate conductive elements (20, 22) disposed along side each other, joined together at one end (24) and having their opposite ends fixed, means for generating a transverse magnetic field, and means for passing a current through the two flexible elements (20, 22) in series. The linear actuator may be used in a fluid dispenser, linear displacement of the end (24) of the flexible elements being used to open and close a valve aperture.
Abstract:
Arrangement for a valve (2) intended for the discharge of a high-viscosity medium (3), which valve comprises a regulator arrangement (4) for a valve body (5) capable of connection to an outlet (6). A fluid supply passageway (7), which is separate from the receiving space (9) for said medium, leads to the outlet (6), by means of which passageway distinct interruptions can be achieved in the medium (3) distributed from the valve (2) thanks to the presence of a fluid-containing accumulation in the medium (3), for example an air bubble.
Abstract:
A device for application of a string or dab of liquid or plastic substance (12), e.g. putty, glue, paint, lubricant or the like, to an object. The device incorporates a pump (13) for feeding the substance to at least one nozzle (15a) provided at a distance from the object. To the conduit (14) between the pump (13) and the nozzle (15a) is connected at least one booster (16), which is adapted by means of a pressure medium to impart to the substance a pressure considerably higher than the pump pressure. The duration of the substance jet through the nozzle (15a) is adjustable by means of a control valve (15) connected to the pressure medium conduit (20, 31) of the booster (16), and having its valve body (28) balanced between the pressurized substance (12) and the pressure medium, which is arranged to act upon the valve body (28). In the pressure medium conduit (20, 31) of the control valve (15) is provided a valve (19, 32) for controlling the position of the control valve (15).
Abstract:
Improved method and apparatus for applying a coating (24) on one side of a substrate (14), moving in between media cushions through the passage (12) of a cabin section (10), with in the direction of movement of such substrate (14) through the passage (12) in at least the passage section (28) in front of the coating supply channel (22) the establishing and maintaining of a coating lock (34), which prevents superfluous coating to escape this passage section (28) in the direction of movement of this substrate (14).
Abstract:
In a device for ejecting small amounts of a liquid material having accurately defined volumes from a chamber (1), the chamber has a nozzle aperture (7) and a rod (9) is mounted in or attached to a wall of the chamber (1), so that an end surface (11) of the rod is located opposite and at a small distance of the nozzle aperture (7). A driving device is coupled to the rod (9) for displacing the end surface (11) forwards and backwards inside the chamber with a very small stroke, with a high acceleration and a large force, so that a pressure wave is formed and propagates in the material in the chamber (1). The pressure wave then ejects material out of the nozzle aperture (7).
Abstract:
A method for manufacturing a laminate comprising at least two sheets of magnetic material is disclosed. The laminate (10) may be used to form a stacked transformer core. The method increases the productivity of the core-stacking process, decreases the core loss destruction factor, decreases total core loss, decreases acoustic noise generated by the electrical device employing the laminate, and does all of this in a manner which is commercially practical. The method comprises applying an adhesive (12), preferably a hot melt adhesive, in a pattern of thin beads onto one side of a first lamina or sheet of magnetic material, the pattern comprising a plurality of lines, the lines being substantially parallel to each other and substantially perpendicular to a direction of grain orientation or rolling direction of the lamina. A second lamina is then stacked onto the one side of the first lamina, and then a compressive force is applied to specified areas of the laminate. The spacing between the respective lines of adhesive is preferably 1-20 millimeters and, for an approximate diameter (D) of each bead, the spacing (S) between the beads of each line is preferably between D and 2D.
Abstract:
A method of coating the surface of a substrate with an essentially solvent-free polymerizable fluid that includes passing the fluid through a die onto the surface of the substrate as the substrate moves relative to the die. The die includes a channel adapted to receive the fluid and an adjustable width slot in communication with said channel through which the fluid is passed formed between a substantially straight, sharp edge located on the downstream side of the substrate and a land located on the upstream side of the substrate.