Abstract: A curtain coater includes separate infeed and outfeed conveyors defining a space. Two separate coating systems are mounted on a carriage in the space for selective movement into a coating position. Each coating system includes a separate coating head, trough for the recovery of unused coating material, and doctor blade. A chrome roll is positioned in the space for selective engagement by the doctor blades. When the first head is in the coating position, the first doctor blade engages the roll and the second doctor blade is in a storage position covering the second trough to close the second coating system. When the second coating system is in the use position, the first doctor blade is in the storage position over its trough and the second doctor blade is in its use position in engagement with the roll. A synchronous driving mechanism for the infeed conveyor, roll and outfeed conveyor includes hydraulic motors for the roll and outfeed conveyor.

Abstract: In a device for applying designs to advancing webs, particularly textile and similar webs, in which the design liquid is present, prior to application to the web, in the form of a film extending over the web in the width direction an air nozzle in the form of a tube extending across the web close to the film, the tube supported for rotation and for movement back and forth across the web, the tube having a plurality air outlet openings distributed over its surface, and supplied compressed air feed line is used to irregularize the film.

Abstract: An apparatus for curtain coating is provided wherein a falling curtain of coating liquid is formed by causing coating liquid to flow as a layer down an inclined surface of a slide hopper, the inclined surface terminating in a lip and the coating liquid beginning its fall after flowing over the lip on to a travelling web positioned beneath the slide hopper and being coated thereon as a layer. The slide hopper is provided with two vertical edge guiding plates extending parallel to the direction of web motion and being of such width to allow the curtain edge to follow its natural inflected path. Preferably the edge guiding plates are composed of an easily wettable material, particularly polymethymethacrylate.

Abstract: The velocity of a free falling coating composition stream emitted from a coating applicator is altered prior to reaching a web by streams of gas directed over air foils situated immediately adjacent said coating composition stream.

Abstract: An apparatus for texturizing yarn or woven fabric while recovering partially the heat energy employed in the process. It consists of a texturizing chamber, a plurality of containers for liquid vehicles at different temperatures, means for introducing, conveying and removing a material to be texturized, and means for introducing, impurging, removing and recycling the liquid.

Abstract: A device for coating a travelling web of material such as photographic paper with a coating liquid includes a means for transporting the web along a path of travel and a coating hopper of the slot or slide type positioned above the path of travel and provided with a pouring lip from which the coating liquid falls freely as a liquid curtain onto the web to be coated. The pouring lip is provided with a rectilinear sharp edge at a distance of 0.7 to 2.5 mm from an imaginary vertical plane in the operative position of the hopper which is at a tangent to the pouring lip at that boundary surface which is on the coating liquid side. By virtue of this sharp edge a straight wetting line, and consequently a very even curtain thickness can be obtained. If the coating hopper is of the slide type whose slide surface is cylindrically curved in the area near the pouring lip the radius of curvature is preferably within the range between 20 and 40 mm, particularly between 25 and 35 mm.

Abstract: Method and apparatus for applying wax to a cardboard box blank formed from board having substantially straight parallel open-ended internal interstices, in which a zone of cascading flow of wax impregnated material is generated and the box blank is passed through the zone with the board interstices open to the wax flow.

Abstract: Curtain coater apparatus is disclosed for coating objects wherein the coater head is maintained substantially full of coating material, the material is discharged through an elongated adjustable orifice at a rate to form a stable or unbroken curtain, and an object is conveyed through the curtain at a velocity to deposit a layer of the material of pre-determined thickness onto the object. The heat is provided with a longitudinally split, resilient, metallic, tubular member, with orifice knives carried thereby along the split, one knife being movable by hydraulic actuators with respect to the other knife to define the elongated adjustable orifice. A crank and rack arrangement, carried by the head, is used to adjust the stroke of the hydraulic actuators, and thereby to regulate the orifice width.

Abstract: A paint curtain machine for coating a substrate with paint has a fix mounted guide plate at either edge of the curtain for guiding and determining the edges of the falling paint curtain that otherwise tends to draw together and pour or at least to wrinkle and produce uneven paint coatings. The inner edges of the guide plates to which the paint curtain edges cling by capillarity are sloped inwardly toward the bottom of the curtain. Excess paint falling outside the left and right edges of the paint curtain fall about straight down the faces of the guide plates leaving a region of those faces dry adjacent the paint curtain. A highly uniform thickness of the paint curtain is realized permitting the attainment of thinner paint curtains having a high resistance to tearing. This system and method are especially advantageous in making thin ceramic dielectric layers in the production of monolithic ceramic capacitors.

Abstract: A flow coat head for curtain coating, particularly of sheet material, employing a container for the coating material having a pair of end walls connected by an elongated tubularly-shaped body, provided with an elongated longitudinally extending slot in the wall thereof which forms the material discharge opening of the head, and extends continuously from one end of the body to the other, with the body wall peripherally extending continuously from one of its longitudinal slot edges to the other thereof, forming a slot having a transverse width at least equal to the maximum desired operating width of the material discharged, pressure being applied on said body member at opposite sides of the slot in directions to move the edges of the latter toward one another and thereby vary the effective discharge width of the slot.

Abstract: A cascade coater having a slideway and extending therein a slot which widens in the downstream direction as it meets the associated slideway. The slot is formed by upstream and downstream boundary walls, the downstream wall joining with a flat face angled with respect to that wall and the surface of the slideway or being curved to meet the slideway. The upstream and downstream surfaces of the slideway can lie in the same plane or different planes which are parallel and spaced apart by a distance of about 1 mm.

Abstract: Apparatus usable in combination with means for extruding a waterproof plastic sheath on foam coating on the exterior of pipe, for reducing the diameter of the plastic sheath adjacent the pipe section ends to conform to the beveled end surfaces of the foam coating and adjacent protruding marginal portions of the pipe surface and thereby form a water stop excluding moisture from the foam thus enclosed by the plastic sheath.

Abstract: A method of coating a travelling web with at least one layer of a liquid coating composition, includes the steps of moving the web along a path through a coating zone and forming at the coating zone a free-falling vertical curtain which extends transversely of the path and impinges the travelling web to deposit thereon a coating. The free-falling curtain is composed of at least two separately formed free-falling partial curtains which are joined edge to edge, one partial curtain constituting an edge region of the integral curtain and the other or others constituting a central region and another edge region of the integral curtain.

Abstract: Apparatus for coating confectioneries such as chocolates or biscuits, including a feed device for receiving the confectionery to be coated and feeding the confectionery to a coating device wherein the confectionery is coated, means for driving the feed device and the coating device in synchronism, and means disposed immediately downstream of the coating device for receiving and discharging the coated confectionery and including a removable belt and drive means for advancing the belt over a guide plate fitted adjacent the coating device and thence over a removable support plate whereby confectionery coated in the coating device is received on the advancing belt, the guide plate having a normal working position and being disposable away from the coating device out of working position, and including control means for temporarily displacing the guide plate away from the coating device during the passage of the leading end of the belt into the gap between the leading edge of the guide plate and the coating device.

Abstract: An apparatus for coating a liquid on opposite sides of a flexible material, which is particularly suitable for use in applying a splicing cement to predetermined surface areas on obverse and reverse sides of a vehicle tire tread. The apparatus comprises in combination: first sheet conveying means for transferring a flexible sheet material through a first coating position; first liquid coating means located at the first sheet coating position for applying a coating liquid on a predetermined surface on an obverse side of the sheet material; second sheet conveying means for transferring the flexible sheet material through a second liquid coating position; second liquid coating means located at the second coating position for applying the coating liquid on predetermined surface on a reverse side of the sheet material; and turn-over means located between the first and second sheet conveying means for transferring the flexible sheet material upside-down from the first to the second sheet conveying means.

Abstract: This disclosure depicts curtain coating apparatus for applying a coating of phosphor or other CRT screen material to the concave inside surface of a curved skirtless cathode ray tube front panel. The apparatus conveys the panel through a curtain of the coating material with its concave surface facing upwardly. The path along which the panel is conveyed (and thus the panel motion) is such as to produce a high degree of uniformity in the coating received by the panel.

Abstract: Apparatus is provided for the simultaneous application of a plurality of layers of liquid coating compounds to an article. The apparatus and method of use thereof is, in one aspect, intended for coating a film with photographic emulsions.

Abstract: In a method of coating a support with a liquid coating composition in which the coating composition is applied by impingement of a free-falling curtain of coating composition onto the surface of the moving support, formation of edge beads along the edges of the coating which are of greater thickness than the remainder of the coating is effectively avoided by use of laterally adjustable edge guides which are initially positioned so as to establish a stable free-falling curtain and then moved laterally to a position in which they are slightly further apart, whereby the coating assumes a uniform thickness. Apparatus for effecting this improvement in the coating process includes clamping means for holding the edge guides in a vertical position and means for effecting controlled lateral movement of the clamping means.

Abstract: An apparatus for applying a thin liquid film to a continuously moving web of large width comprises a liquid supply chamber adapted to be fed by a pump. A smoothly tensioned foil, arranged to receive liquid from the supply chamber, constitutes a guide surface to form a liquid film, and has a lower edge arranged to discharge the film onto the web of material. Means arranged ahead of the foil is provided for calming the liquid.