Abstract:
An apparatus for treating cellulosic fiber containing fabrics to improve durable press and shrinkage resistance includes using steam as a vehicle to supply vaporized liquid cellulosic cross-linking agent and vaporized liquid catalyst to a reaction chamber in which the fabric articles are treated by cross-linking the cellulose. Normally liquid cross-linking agent and liquid catalysts are directly injected into a stream of treating steam to cause vaporization of the cross-linking agent and catalyst. Alternatively, a steam driven ejector type pump is utilized to entrain and vaporize liquid cross-linking agent and liquid catalyst in a flowing stream of steam supplied to the reaction chamber. Gaseous ammonia may also be supplied to the reaction chamber to condition the cellulosic material containing fabric before cross-linking.
Abstract:
A coating device having a blade for metering a coating material onto a running web of paper or cardboard guided by a roll includes at least one noncontacting sensor disposed near the blade and between apparatus for adjusting the transverse profile of coating. The sensor provides a signal indicating the position of the blade. The device also includes a receiver for receiving the signal of the sensor and a control device for controlling the angular position of the blade as a function of the sensor signal. The angle of contact of the blade on the roll is determined as a function of the known pressing pressure (or a corresponding proportional value thereof) of the blade caused by the profile adjustment apparatus, preferably determined by a computer or microprocessor.
Abstract:
Apparatus for controlling the thickness and distribution of coating on a sheet of material being drawn upwardly from a bath of liquid coating material includes upper and lower lip members having a fixed contour defining an elongated outlet orifice which has minimum gap opening at the central portion thereof and tapers outwardly to larger gap openings at the ends of such orifice.
Abstract:
A method of applying particulate matter to a cable core comprising providing first and second chambers, both of which have entrance and exit ports, the first chamber containing particulate matter and the exit port of the second chamber containing an air wipe which includes a cable core passageway in communication with the interior and exterior of the second chamber and at least one air passageway which is in communication with the cable core passageway and has an elongated longitudinal axis disposed at an acute angle to the longitudinal axis of the cable core passageway so that gas flowing through such a passageway is directed into the second chamber; passing a cable core through the first chamber and applying particulate matter to it to form a coated core; passing the coated core through the second chamber and said air wipe; and, forcing a gas through the air passageway in the air wipe onto the coated core to remove a predetermined amount of particulate matter from the coated core and transmit same into the interior of the second chamber.
Abstract:
Following the application of plastic extrudate to transmission medium being moved along a path of travel to provide an insulative covering, the covered medium is moved through a cooling medium and then through an air wipe device (20). The air wipe device, which is effective to remove any of the cooling medium remaining on an outer surface of the cover, comprises a helically extending manifold (42). Spaced along inner surfaces (51, 52) of the manifold are a plurality of sets of orifices (50--50) from which air is directed into engagement with the moving transmission medium. Each set of orifices is arranged to direct streams of air toward the path of travel and hence into engagement with the transmission medium in a manner such that cooling medium is removed from the entire outer surface of the transmission medium. Also each set of orifices is such that the air which is directed toward the moving transmission media does not reengage the air wipe device. A plurality of single orifices (60--60) alternate with the sets of orifices and cooperate with the sets to maintain the transmission medium disposed along the path of travel substantially adjacent to the focal point of the streams of air from each set of orifices.
Abstract:
An improved gas knife wherein a coating which is generally uniform across the width of a paper web can be applied thereto. The gas knife contains a flexible gas flow modification member located adjacent to the inside of the nozzle of the gas knife for modifying the flow of gas whereby the coating weight can be adjusted differentially across a web being coated.
Abstract:
In an apparatus for the continuous, uniform coating with a liquid coating material of a web passing over a counter roll, comprising an air-nozzle arrangement for the removal of excess coating material and the smoothing of the coating, said air-nozzle arrangement being rotatable about its longitudinal center axis, being disposed adjacent to the counter roll and comprising two slot nozzles disposed symmetrically about its longitudinal center axis and displaced 180 degrees relative to each other, each nozzle extending at least over the width of the web, and the two lips of each nozzle being seated on nozzle-lip holders mounted on the casing of the air-nozzle arrangement, the improvement which comprises imparting to the nozzle-lip holders an angular construction and mounting them on the casing in such a way that they can be positioned and adjusted in the direction of the nozzle-slot width; one of the nozzle-lip holders being of smaller cross section over its angled area than the other nozzle-lip holder; the nozzle-lip holders of each slot nozzle being interconnected through adjustable means exerting a pulling and pushing action and which are distributed over the length of the slot nozzle.
Abstract:
An improved air knife apparatus and method for controlling coating thickness on a moving metal strip. Air flow from blowers is supplied through a plenum chamber common to an air knife and a diffuser spaced along the path of strip travel. A valve between the plenum chamber and diffuser controls the relative flow of air through the knife and diffuser to establish the desired pressure and flow at the air knife to modify the thickness of the coating on the strip. The flow through the diffuser is directed against the strip at a location subsequent to the knife in the direction of strip travel, to chill the coating.
Abstract:
A gas wiping die for wiping wire issuing from a molten metal coating bath is provided with critical parameters with respect to the die angle, the length and thickness of the die orifice and the relationship of the sides of the orifice, the throat diameter of the die and the height above the molten bath surface. The thickness of molten coatings on wire wiped with the combined die can be very accurately controlled by changes in wiping gas pressure.
Abstract:
Apparatus for dusting articles such as electrical cables with a powder such as talc, to prevent the articles sticking together, comprises means for agitating powder in a chamber and means for conveying powder-laden air from the chamber to a dusting nozzle.For efficient dusting of an article, it is important that a constant uniform flow of powder-laden air is conveyed to the dusting nozzle.A fluidized bed of dusting powder is created by a fan creating an air flow up through a permeable screen. A conveying nozzle receives some of the air flow, being positioned close to the screen, and comprises a convergent portion which accelerates the flow of powder-laden air to transport it to a discharge portion of the nozzle.