Abstract: A device for the application of a thin layer of a coating material (7) onto a material web (2) passing across a backing roller (1) comprises a slot nozzle arrangement (3) having a nozzle slot (4). In order to ensure uniform and sufficient delivery of coating material (7) across the length of the nozzle slot (4), the coating material (7) is delivered from a supply container (8) through a delivery channel (10, 11) extending across the coating width to the nozzle slot (4) of the slot nozzle arrangement (3) and in the delivery channel (10, 11) of the slot nozzle arrangement (3) a gear pump arrangement (12) is provided which has a plurality of rectilinearly aligned pump sections (13), each having two intermeshed pump gears (14, 15), the arrangement extending over the coating width and arranged with the distance pieces mounting the pump gears (14, 15) between the pump sections (13) to be easily removable. The distance pieces (16) are formed as carbon bearings and the parts are channeled for heating and cooling.

Abstract: Apparatus for coating a web, such as paper or board web, comprises a coating nip formed between a rotating counter roll and a smoothing member, or between two smoothing members, through which the web to be coated is passed with a coating substance being applied to the web before it passes through the nip. The apparatus comprises an arrangement by which the linear load and/or the distribution of the linear load in the coating nip is adjustable to control the quantity and/or the distribution of the quantity of the coating substance applied to the web in the transverse direction thereof. A smoothing member comprises an elongate member extending transversely to the direction of web movement through the apparatus and is flexible with respect to its longitudinal dimension so that the profile of the load distribution in the nip can be adjusted to be relatively steep, i.e, the load in the nip may differ relatively widely at points which are relatively close to each other.

Abstract: A coating material is applied to a surface, such as the back surface of carpeting, using a perforated roller. The material is supplied to the outer surface of the roller so as to form a well of material on the surface passing through the perforated body of the roller up to a second similar roller inside the perforated roller. The roller may be fixed or may be driven depending on the nature of the pattern to be applied to the coating material by the roller.

Abstract: A screen printing drum and machine including said drum for applying a coating to various shaped substrates, more particularly, slender-like substrates, more particularly writing implements.

Abstract: An array of at least three parallel rolls is provided. The rolls are constrained against each other to provide an elongated coating chamber through which passes a web entrained on at least one of the rolls. As it exits from the chamber, the coated web surface is wiped by another of the rolls, whose surface is entering the chamber at that point.

Abstract: A size press, which comprises three coating rolls (11, 12, 13). These rolls (11, 12, 13) form two press nips (N.sub.1, N.sub.2) as pairs with each other, the paper web (W) to be treated being passed through the said press nips. Both sides of the web (W) are treated in the said nips (N.sub.1, N.sub.2). Out of the said coating rolls, regarding the position of altitude, the uppermost roll (12) has been arranged as the center roll of the size press, in connection with which center roll the two coating nips (N.sub.1, N.sub.2) are formed so that the first coating nip (N.sub.1) is placed at a short angular distance (.alpha..sub.1) underneath the horizontal plane (H--H) placed through the axis of the said center roll (12). The second coating nip (N.sub.2) is formed by the third coating roll (13), which is placed substantially in the vertical plane (V--V) placed through the center point of the center roll (12) or at a small angle (.alpha..sub.2) after the said plane. As preceding the first nip (N.sub.

Abstract: In a coating method, a coating section is arranged immediately before a coil bar while a smoother is disposed immediately after the coil bar, immediately after a coating solution is applied to a web which is run continuously a surplus of coating solution is scraped off and the web is subjected to smoothing by the smoother directly without undergoing a gaseous phase.

Abstract: In method of metering a coating solution, a coil bar is rotatably supported on a holder, and after a coating solution is applied to a web which is continuously run, a surplus of coating solution is scraped off with the coil bar, metering is carried out while a solution which is substantially the same in composition as said coating solution is supplied continuously to both sides of the coil bar which are before and after in the direction of run of the web, at a predetermined flow rate.

Abstract: An apparatus for producing a composite pipe having a desired wall thickness by using an endless steel belt as a mold which moves axially while rotating in the circumferential direction of a mandrel. In this apparatus, a thickness regulating device spaced a predetermined distance from the outside surface of the endless steel belt is used to adjust the wall thickness accurately to the desired value. Examples of the thickness regulating device are a cylinder roll, a taper roll, and a conveyor belt.

Abstract: A manually-operated applicator for use in applying a film of wet material in a preselected, uniform, initial wet film thickness on the top flat surface of a workpiece which is in a level position. The applicator comprises a cylindrical rod having a plurality of equally spaced-apart, annularly-shaped protrusions which form contact surfaces with the wet material and with the surface of the workpiece. The protrusions extend from the circumferential surface of the applicator a distance equal to the desired uniform thickness of the wet film. The wet material is manually rolled or pushed or pulled with the applicator by the user until the wet material covers the surface of the workpiece in its entirety, and until the top surface of the wet film is flush and level with the contacting circumferential surface of the applicator.

Abstract: A first layer (a') of sweetmeat material (a) is charged onto a revolving heating/cooling roller (1) and is spread out thereon. At least one further sweetmeat mass (b), is applied at a circumferentially offset station, to this layer (a') to form a second layer (b') and define a combined sheet. This sheet is taken off the roller, transferred onto a conveyor belt (7) and delivered for further processing.

Abstract: A device for spreading a substance onto a moving web of material, which comprises an extrusion head and a rotating bar which is carried by a support member applied to the extrusion head near the outlet of a delivery slit. This latter has an inner profiled recess in which engage limiting blade segments which extend up to the outlet of the delivery slit in order to laterally limit the regions in which spreading is carried out. The rotating bar has its outer surface operatively contacting the web only in the regions in which the substance is spread, and it is recessed or interrupted where no spreading is wanted. This device allows to spread a substance onto a width of web reduced with respect to the width of the extrusion head, or even onto separate strips of the web.

Abstract: Method of coating or impregnating a guided web-shaped substrate with a flowable medium, which includes monitoring the composition of the flowable medium; continuously measuring the rate of travel of the substrate; applying a metered amount of flowable medium to the substrate at a given feeding point, corresponding to the monitored composition of the flowable medium and corresponding to the measured rate of travel of the substrate; continuously measuring the amount of flowable medium not yet accepted by the substrate; and regulating the transfer of flowable medium to the moving substrate corresponding to the measured amount of flowable medium to maintain a constant amount of flowable medium applied within pre-determined limits, and an apparatus for carrying out the method.

Abstract: An apparatus for applying a treating medium to a screen has a container above the screen and a pipe which discharges foamed treating medium into the container from where an outlet leads to the screen. A foam generator supplies the foam and the pressure at which the foam enters the container can be regulated.

Abstract: A method and an apparatus for fabricating gravure printing cylinders of synthetic resin in which a photosetting polyamide resin used as a solution of a coating resin is applied over the surface of a cylindrical base spirally as successively overlaid layers and thereafter the applied resin is subjected to drying by a heater and to photosetting by irradiation with ultraviolet rays, electron rays or the like. The resin layer surface thus obtained is mechanically engraved by an electronic engraver for forming gravure cells. The irradiation of ultraviolet ray, electron ray, or the like may be effected during or after application of the polyamide resin over the cylindrical base. The apparatus comprises a resin solution retainer closely adjacent to the cylindrical base. A substantially vertical lever pivoted for movement toward and away from the base supports the solution retainer. The lever may be moved by an element such as a motor-driven eccentric cam.

Abstract: A novel method for producing a composite pipe having a desired wall thickness by using an endless steel belt as a mold which moves axially while rotating in the circumferential direction of a mandrel. In this method, a thickness regulating device spaced a predetermined distance from the outside surface of the endless steel belt is used to adjust the wall thickness accurately to the desired value. Examples of the thickness regulating device are a cylinder roll, a taper roll, and a conveyor belt.

Abstract: A method and apparatus for foam coating a web are provided that allow for easier cleaning, greater versatility of fabric styles without the introduction of voids in the foam backing, and elimination of voids in the foam backing at seams, or within the web length, due to wrinkling or creasing of the fabric. A doctor blade is provided on top of and slightly in front of a roller, and a foam pillow is formed at the top of the roller, with the fabric providing a bottom barrier for the pillow. The fabric is continuously fed passed a slat expander, which removes wrinkles from it, and then immediately into contact with the periphery of the roller, the roller holding the fabric taut. Needle points can be provided on the fabric peripheral surface to facilitate positive holding of the cloth in place.

Abstract: A fabric to have a latex coating of controlled thickness applied to its upper surface moves toward a drying oven. The lower surface of the moving fabric contacts a supporting bedplate. A latex coating is applied to the upper surface of the moving carpet across the width of the carpet. The moving carpet with the latex coating travels underneath a nip roll. A flexible nip blade is positioned underneath the nip roll so that the edge of the nip blade extends beyond the bottom dead center of the nip roll in the direction of the drying oven. Both the nip roll and the nip blade extend across the width of the moving carpet.

Abstract: A method and apparatus for high speed application of sizing compositions in which there is a pair of oppositely rotating rolls forming a coating nip therebetween through which a paper web to be sized is directed. Sizing composition is delivered to the nip in sufficient quantity to form a pond of sizing composition above the nip. The invention is particularly concerned with reducing the effects of translational energy which is transmitted into the pond from the rolls by providing at least one flexible baffle member which extends into the pond on opposite sides of the paper web into proximity with the nip. The baffle member should be sufficiently long to absorb translational energy which would otherwise be absorbed by the pond of sizing material.

Abstract: A combined size press and breaker stack comprising a breaker roll and a coating press roll and an intermediate roll selectively alternately shiftable into breaker nipping relation to the breaker roll or coating nip relation with the press roll, and guiding paper web, traveling continuously from a supply to a disposition point, to either of the alternately selected nips. Coating material is supplied to the paper web while traveling through the coating nip.

Abstract: A bar coating process for coating a coating liquid on a continuously travelling web which comprises the steps of supplying a coating liquid so as to form a liquid reservoir immediately before a position of contact between a bar and the web, and coating the coating liquids on the web using the bar, wherein the bar is axially positioned perpendicularly to the travelling direction of the web, is supported on a supporting member and is rotated in the same direction as that of the web while coming into contact with the web. The diameter of the bar being 6 to 25 mm.

Abstract: Apparatus selectively convertible to perform one or more coating operations on a web of paper or the like comprises a fixed rotatable roller, a coating blade movable into and out of coating relation with the surface of the fixed roller and cooperating with a dam of coating material to coat a web as it passes through the nip between the coating blade and the fixed roller, and a second movable roller movable into and out of nip forming relation with the fixed roller with provision for adjustment of pressure in the nip and adapted to cooperate with a dam of coating material to coat a web as it passes through the nip between said rollers, said movable roller also being adapted alternatively to receive coating material and to transfer it to the fixed roller to coat one side of a web as it runs over the latter.

Abstract: A paper web processing mechanism for applying a combined breaker press and size press coating operation including a first breaker nip formed between a first hard surfaced chilled iron roll and a second coating roll with the first roll being loaded to control the nip pressure and a third roll forming a coating nip with said second roll with the web led immediately through the second nip either by following the second roll or being passed over a guide roll therebetween and the web coated as it passes into the second nip in either a gate roll coating operation by gate rolls nipped against the third roll or by a puddle coating operation with coating supplied to the upwardly facing side of the second nip.

Abstract: An extrusion coater for high viscosity, thin coatings of the hot melt type, includes an elongated slot coating head across which the web to be coated is advanced under tension and includes a lead-on lip at the slot plus a fixed, unyieldable, lead-off lip having an elongated, rotatable, cylindrical rod deeply seated for about two thirds of its circumference therein and unyieldably supported on a fixed axis of rotation. A yieldably mounted, press roll with a rubber like surface forms a pressure nip with the smooth hard unyieldable surface of the rod and the rod is rotated intermittently, or continuously by power means depending on the amount of impurities in the coating media. The rod rotation is not for metering purposes but for spreading wear while overcoming any streaking.

Abstract: An improved process for coating sheet substrates with thermoplastic polymer is disclosed. In the process the sheet substrate forms one die lip of the extrusion coating die. The sheet substrate is passed from face-to-face contact with the metal block of the extrusion coating die into a spaced apart relationship with one die lip of the extrusion coating die, the sheet substrate forming the second die lip. Molten thermoplastic polymer is extruded into the space between the one die lip and the sheet substrate, thereby coating the sheet substrate with polymer. The preferred polymer is a poly-.alpha.-olefin, especially polyethylene or a copolymer of ethylene and butene-1. The preferred sheet substrate has orifices in the surfaces thereof. The process may be used to coat sheet substrates with a thermoplastic polymer, e.g. in the manufacture of form boards for the construction industry.

Abstract: Annular shaped packages of yarn and the like are draped about a pair of rolls rotatable about horizontal axes. The rolls are moved apart to apply tension to the package, and a squeeze roll is urged toward one of the other rolls and against the package. One of the rolls is rotated to move the yarn package about the rolls, and liquid dye is applied to a downwardly moving portion of the package above the squeeze roll.

Abstract: Both sides of a travelling web are adapted to be continuously but separately coated with coating material by passing the web through successive roll-formed puddles in a simple three roll arrangement. Means are provided for preventing coating migration from one puddle to the other.

Abstract: A fabric to have a coating of controlled thickness applied to its upper surface moves between a supporting roll and a supporting plate. The lower surface of the fabric contacts the supporting roll and supporting plate but is unsupported therebetween. Between the supporting roll and plate, the moving fabric is depressed by a blade extending across its width. Near to the blade and between this blade and the supporting plate, a coating is applied to the upper surface of the fabric. A gauging device adjacent to where the coating is applied controls the thickness of the coating. The distance between the blade which depresses the fabric and the supporting plate should be several orders of magnitude greater than the distance between this blade and the gauging device. Any variations in fabric thickness as the fabric passes over the supporting plate would cause corresponding variations in the coating thickness if the coating were being applied over this plate.

Abstract: A doctor roll arrangement, especially for stencil printing, comprising a hollow tube rollable on a support, the tube being provided with gaps through which part of a supply of an inking substance can enter into the interior of the tube, the supply being normally placed in front of the tube. The arrangement may include an internal doctor that is fitted into the tube, and being preferably adapted to revolve. The internal doctor may be constructed as a magnetic roller that can be attracted by a magnetic body. In accordance with the invention, the internal doctor can also be constructed as a perforated, hollow tube. Furthermore, a further magnetic roller can be fitted in the perforated tube, acting as a further internal doctor. Finally, at least one of the hollow tubes, the internal doctor, and the further internal doctor can consist of a magnetizable material that can be attracted by the magnetic body.

Abstract: Web coating apparatus wherein a liquid coating material is pressure fed upwardly into the nip of rolls rotating in opposite directions through the nip by structure which prevents contact of the coating material with the atmosphere, enables desired temperature control, and enables vacuum degasing of coating material prior to being pressured into a region adjacent to nip. This coating apparatus is particularly suitable for applying molten resinous compositions to webs.

Abstract: An improved process for coating sheet substrates with thermoplastic polymer is disclosed. In the process the sheet substrate forms one die lip of the extrusion coating die. The sheet substrate is passed from face-to-face contact with the metal block of the extrusion coating die into a spaced apart relationship with one die lip of the extrusion coating die, the sheet substrate forming the second die lip. Molten thermoplastic polymer is extruded into the space between the one die lip and the sheet substrate, thereby coating the sheet substrate with polymer. The preferred polymer is a poly-.alpha.-olefin, especially polyethylene or a copolymer of ethylene and butene-1. The preferred sheet substrate has orifices in the surfaces thereof. The process may be used to coat sheet substrates with a thermoplastic polymer, e.g. in the manufacture of form boards for the construction industry.