Abstract: Tablets are coated by tumbling a batch of tablets in a rotating coating pan and subjecting the tablets while they are in the pan to a plurality of treatment steps. Each of these treatment steps consists of a plurality of treatment cycles each including a dosing period in which a measured quantity of tablet coating liquid is introduced into the pan, a drying period in which drying air is supplied to the interior of the pan and an intermediate mixing period during which the tablets tumble in contact with the already introduced coating liquid for a pre-set time and no drying air is supplied to the pan. The temperature of the batch of tablets being coating in the coating pan is sensed by a sensor. The temperature of the batch of tablets at the end of a pre-set time interval from the commencement of the drying period is stored in a memory device as a reference temperature.

Abstract: A method for making a slurry containing particulate matter and fibers for a preformed insulation product comprises mixing dry particulate matter with a binder which is a liquid containing dispersed fibers. An apparatus suitable for practicing the method comprises a means for disposing the particulate matter in the form of a falling curtain and a means for spraying the binder on the particulate matter.

Abstract: A polyester film, typically a support for photographic material is coated, prior to coating a hydrophilic organic colloid layer, with a subbing composition containing at least one compound represented by the general formula ##STR1## wherein a and d each represent 1 or 2; b and c each represent 0, 1, or 2 but b and c must not be 0 at the same time, A represents a divalent group; and n represents 0 or 1.

Abstract: A coating composition comprises a dispersion of a fluorocarbon polymer in an inert diluent having dissolved, or preferably dispersed, therein a low molecular weight (RV less than 0.25) polyethersulphone or precursor thereto.

Abstract: Method and apparatus for mixing particulate materials, such as sand, gravel, and cement to form a concrete mix, and for mixing water with the concrete mix to form concrete, and for applying the concrete to a structure such as a pipe, wherein a controlled amount of aggregate is placed on a moving belt and leveled to further control its amount, and then a controlled amount of cement is placed upon the leveled aggregate and leveled to further control its amount, and then the materials on the belt are mixed by spiked rollers dipping into the mixture, water being added to form the concrete, and the concrete being impelled against the object by being passed between high speed rollers.

Abstract: Apparatus to inhibit water pollution in surface treatment of metals, e.g., in coating base metal parts with an adherent coating of zinc, cadmium or similar protective metal by means of wet impact plating or electroplating, or in chromating or phosphating metal surfaces. A preferred embodiment relates to a wet impact plating process wherein the several solutions used in preparing the work, in plating it and in rinsing it are individually segregated after use and re-used in consecutive plating cycles so that release of ecologically objectionable effluent is eliminated and chemical and metal components fed into the process are conserved instead of being discarded after each plating cycle.

Abstract: A machine for the coating of a strip material substrate, flat stock or the like has a plurality of spray coating guns applying coating material to the substrate. A sloping ceiling and nozzle support assembly causes any coating material deposited thereon to flow along these surfaces to the side of the substrate rather than collecting above the substrate and dripping on the substrate and degrading the desired finish. In a rotary coater, the sloping ceiling and nozzle support assembly can be combined into one rotating structure wherein centrifugal force arising from the rotation of the structure causes any coating material deposited on it to travel to its outer rotating edge where it is thrown clear of the substrate. Troughs over the entrance and exit openings of the coater collect coating material which would otherwise drip onto the substrate from above the openings and carry such coating material clear of the substrate.

Abstract: In a method of treating a surface such as a paper web with a treating agent, the treating agent is foamed under pressure and delivered via a passsageway to an application zone so as to come into close proximity with the surface to be treated which may be moved continuously past the application zone. A constriction, upstream in the direction of foam flow, of the passageway causes a pressure drop in the body of the foam causing bubbles of the foam to burst adjacent the surface, being treated whereby the treating agent is applied to the surface.

Abstract: Method and apparatus for the continuous and automatic manufacture of both glazed and unglazed split tiles by accepting automatically produced uncured newly cut and/or stamped split tile and thereafter automatically glazing and/or hacking same for kiln firing. A first conveyor system is provided where previously cut unglazed split tiles are placed on a conveying system in a spaced-apart fashion, and moved to a transfer position. Thereafter, a whole row of the unglazed spaced-apart split tiles are transferred to a grouping table where layers for a hack are formed by a plurality of adjacent transferred rows. Each layer is subsequently transferred to a kiln car and oriented 90.degree. with respect to the just previously deposited layer so as to maintain the desired spaced relationship in the final hack. A second alternative conveying system is also provided in the preferred exemplary embodiment which moves unglazed split tiles individually through a glazing area where both sides are glazed.

Abstract: Apparatus for continuously depositing a liquid reaction mixture onto continuously moving sheet material which comprises a delivery device having one or more distributors attached to a carriage capable of traversing the moving sheet material in a reciprocating motion, wherein the distributor or distributors are feedably connected to one or more stationary mixing heads. The apparatus is particularly useful for backing 4 to 51/2 mm. wide carpet at speeds of from 3 to 6 mm/min. with a flexible foam mix to a foam depth of up to 4 mm.

Abstract: A body, or stack of bodies, made of timber or of other organic fluid-permeable material is impregnated with an impregnant by introducing the body or stack into a receptacle of fluid-impermeable material through an opening therein, the flexible receptacle being supported by and secured (e.g. by springs) to a substantially rigid structure in such a way that the receptacle is held open for the introduction through said opening of the body or stack. The opening in the receptacle is sealed to form a fluid-tight enclosure and air is evacuated from within the enclosure and from voids in the or each body housed therein to cause the flexible receptacle to collapse around the body or stack. Impregnant is allowed to enter the evacuated enclosure and to flow through and impregnate the or each body.

Abstract: A printing device in which solvent dissolved toner is applied to a recording carrier to produce a symbol or image wherein a printing head is received interior of a housing with toner particles circulated in the housing in a gas stream. Solvent ejectors within the print head are positioned adjacent a slot opening of the housing and direct a toner-solvent stream against a recording carrier exterior of the housing.

Abstract: Apparatus and the method of operation thereof are described for conveying an object, such as a microscopic slide, over a flat liquid-applying surface and interrupting the advance of the object for a predetermined time period while the object is at rest in position of the liquid-applying surface to achieve even application of a treating liquid to the object. The treating liquid can be injected into the space between the object and said flat liquid-applying surface while the object is substantially stationary or prior to interruption of the object movement.

Abstract: This specification disclosed a method of and apparatus for the application of sealant gasketing or protective material to a can end or to other container members in which a transfer head having a transfer face in the shape of the container member area to be covered by the sealant is covered with sealant and the container member brought into contact with at least the sealant on the transfer face to achieve transfer of the sealant to the container member. In one form the transfer head has a passage opening to the transfer face through which sealant is pumped to cover the transfer face. In another form the transfer head is arranged to be immersed in a tank of sealant to cover the transfer face with sealant.

Abstract: Safety device for an electrostatic painting plant using liquid coating products which are very electrically conductive, such as hydrosoluble paints or liquid enamel. An electrically insulating enclosure surrounds the container for the liquid coating material and has a latching device enabling the opening of the enclosure cover to be carried out only in a predetermined sequence, the first step of which causes the grounding of the paint container. The arrangement is such that the container can be disconnected from the ground only after the insulating enclosure cover has been replaced.

Abstract: A method of atomizing liquid paint using a rotating atomizing device and electrostatically coating an article with a smooth homogeneous film of paint and without the generation of foam or other surface irregularities on the article being coated, wherein an electrostatic field is established between the peripheral edge of the rotating atomizing device and the article to be coated and the liquid paint flows toward the edge of the atomizing device as a continuous thin film, which film is formed into a circumferential series of branch flows of narrow width flowing in the peripheral direction of the atomizing edge, and the liquid paint is atomized from the series of branch flows as they are projected beyond the edge of the atomizing device. The rotary atomizing device may be in the form of a bell or disk and includes a plurality of shallow grooves near its periphery preferably extending radially and of increasing depth in the direction of paint flow and terminating at the discharge edge.

Abstract: A process for providing electrical conductors with a heat resistant, insulating coating of resin. The process comprises passing the conductors through a melt of a resin which is polyester curable through free hydroxy groups, having crosslinking equivalent weight of 400-1600, which is produced by condensation at a temperature corresponding at least to the temperature of the melt to an extent such that no substantial further condensation takes place in the melt.

Abstract: Method and apparatus for simultaneously coating both surfaces of a moving web by a direct-indirect gravure technique in which the transfer roll of the indirect gravure system acts as backing roll for the direct gravure roll. The transfer roll is displaceable from the coating position to an inoperative position in contact with the indirect gravure roll to ensure that coating liquid does not form a dry layer on the surface of the transfer roll when the coating operation is interrupted and to remove the web from contact with either coating roll.

Abstract: Electroless plating using alternate operative plating tanks of glass fiber reinforced urethane with polypropylene liners, and a third tank of cleaning fluid applied to the tank not being used.

Abstract: Pollutant emissions produced in the manufacture of asphaltic roofing are controlled by the use of electrified bed filters. Filter bed granules coated with pollutants are removed from the beds periodically and are used in the manufacture of the roofing. A prefilter is employed to remove varnishing pollutant components in the supermicron size range to prevent fouling of an electrical charger.