Abstract: A device for transporting specimens carried on microscope slides through a plurality of liquid containing jars for staining or otherwise treating the specimens. It includes a rail, a conveyor chain, a conveyor motor, an elliptically shaped rod, a rod motor, a plurality of open top jars, a plurality of carriers, and a plurality of slide holders. The jars are positioned along a horizontal path. Each slide holder is pivotally connected to a carrier so that its slide holding portion will extend into a jar or be lifted above the jar when the rod is rotated counter-clockwise 90.degree. from its horizontal position to its vertical position. Subsequent continuous counterclockwise rotation of the rod will alternately permit slides to be lowered by gravity and raised by the force provided by the rod. The carriers and slide holders with slides attached are supported by the rail, moved horizontally by the conveyor chain parallel to the path, and agitated up and down by the rod.

Abstract: Apparatus for applying fluid additive to a stream of fibrous material such as a filter tow. The apparatus provides structure for blowing air into the filter tow during or immediately after the application of the fluid additive, a plasticiser; this foams and distributes the plasticiser in the tow. Air may be delivered from a porous plate closely adjacent to the path of the tow or from nozzles in an air injecting unit. Alternatively air may be used to foam plasticiser at a location remote from the tow and foamed plasticiser subsequently conveyed to and into the tow by a roller.

Abstract: The invention provides a method of treating a cloth to prevent lateral bleeding into the cloth of a later applied oil-based paint and the resulting treated cloth. That portion of the surface of the cloth which is to be painted with an oil-based paint is first sprayed with small droplets of a composition of matter which consists essentially of a hydrocarbon solvent having a boiling point range from above about 25.degree. C. to below about 100.degree. C. and a triglyceride ester having 30 to 70 carbons atoms. The amount of the composition of matter is such as to provide from about a 1 gram per square meter coating of the triglyceride ester to about a 3.5 grams per square meter coating of the triglyceride ester on the surface portion. The sprayed surface portion is then dried to vaporize the solvent prior to application of the oil-based paint thereto.

Abstract: Apparatus for forming matchbox skillets from pre-printed sheets, each sheet having a plurality of rows of matchbox blanks printed thereon. The apparatus includes a sheet feeder for storing pre-printed sheets and removing the sheets one-by-one. The sheets are fed to a gravure printing machine, which applies stripes of striking compound material to predetermined areas of the sheets as they pass therethrough. A conveyor is provided for conveying the sheets from the sheet feeder to the gravure printing machine. After leaving the gravure printing machine the stripes of striking compound material are dried in a radio frequency drier. The sheets are then cut into matchbox blanks by cutting machines. The gravure printing machine has an upper engraving roller, a lower pressure roller, and means for feeding the sheets between the two rollers so that the stripes are printed on the upper surface of the sheets in register with the matchbox blanks.

Abstract: A method for forming a metal layer with a positive pattern on a plastic sheet or plate substrate which comprises printing an oil-soluble, water-insoluble ink on the substrate to provide a negative pattern, forming a metal layer on said substrate by dry metal plating, immersing the substrate in a hydrocarbon having 6-17 carbon atoms, preferably kerosene, and removing the ink layer and metal layer thereon by applying supersonic vibration to the substrate in the kerosene.

Abstract: A method for manufacturing a pressure belt for use with an extended nip press in a paper making machine. The belt is characterized by a base fabric formed of a synthetic fiber filament, and formed with a synthetic resin layer on each outer and inner peripheral side thereof. The outer peripheral side which becomes in contact with the felt is provided with a number of drain channels. In the method of manufacturing, a base fabric in the form of an endless belt is trained around a heating cylinder, guide rolls and stretching rolls. The outer peripheral surface of the base fabric is coated with a curable synthetic resin as the fabric is moved. The layer of synthetic resin is semi-cured by heating means including the heating cylinder. This process of coating and semi-curing is repeated until desired thickness of the resin layer is obtained. Drain channels are then formed in the semi-cured resin by an embossed roll whereupon the resin layer is cured and then ground to provide a desired thickness.

Abstract: Envelope flap moistening apparatus for use in a machine for feeding an envelope having a flap in a predetermined path of travel. The apparatus includes a hinge pin which is connected to the machine so as to extend across the path of travel of an envelope flap. In addition, the apparatus includes an elongate brush for applying moisture to an envelope flap, which brush includes a base. The apparatus also includes an elongate brush retainer which is made of a resilient plastic material. The brush retainer includes first and second channels. The first channel is dimensioned for engagement with the hinge pin and has an elongate opening dimensioned for receiving the hinge pin through the opening for attaching the retainer to the hinge pin. And the second channel, having a generally inverted-U-shaped transverse cross-section, is dimensioned for insertion and removal of the brush base against resilient forces exerted on the base by the walls of the second channel for attaching the brush to the retainer.

Abstract: A silicone applicator and method are disclosed which apply a controlled concentration of an aqueous silicone emulsion to a paper web as the web is moving through a printing press. The applicator comprises a silicone concentrate supply tank, a water supply, and a mixing tank for mixing the slicone concentrate with the water to form an aqueous silicone emulsion of desired concentration. A silicone holding tray holds a supply of silicone emulsion, and a roller picks up the silicone emulsion from the holding tray and applies it to the paper web. A first transfer device transfers to the mixing tank metered quantities of the silicone concentrate from the supply tank, and water from the water supply. Water is charged to the mixing tank when a sensor in the tank senses that the level in the tank is below a predetermined lower limit. The charging is discontinued when the level reaches a predetermined high value as detected by another sensor.

Abstract: A treatment tank (14) for the tinning of printed-circuit boards with a continuous interior chamber (22) has a bottom tank portion (16) joined to a wider upper tank portion (20) by sloping wall sections (18). The heatable bottom tank portion (16) is filled with molten solder (24) over whose surface in the upper tank portion (20) a highly heatable thermofor oil heated approximately at the temperature of the molten solder is poured. Under the surface of the thermofor oil, in the upper tank portion there are disposed two spaced apart jet-nozzle tubes (32) with nozzles (34) aimed toward one another and inclined slightly downwardly from which thermofor oil delivered by a pump (38) can be squirted onto a printed-circuit board (12) drawn upwardly between the jet-nozzle tubes (32) after immersion into the molten solder.

Abstract: A method of abrading and simultaneously coating at least one surface of an article, particularly a circuit board assembly. The method comprises introducing abrasive particles into the compressed gas supply of a spray gun. The resulting gas stream with entrained abrasive particles is transported to and emitted from at least one spray nozzle of the spray gun where it is directed to the surface of the article with a film-forming coating composition stream also directed to and emitted from at least one nozzle of the spray gun. The abrasive particles can be simultaneously sprayed along with the optional coating composition onto the surface (these abrasive particles being microballoons in the case of a circuit board assembly). The surface is abraded while the coating is being applied. The resulting coating is substantially free of abrasive articles and has good adherence to the surface.

Abstract: This invention relates to a washable marking fluid to be used in projectiles in which the prime and critical ingredient is a nonionic polyoxyethylene derivative of fatty acid partial esters of sorbitol anhydride. Projectiles produced from soft gelatin capsules containing such washable marking fluid possess ideal rheological properties and desired uniformity and stability. The fluid when packaged in a soft gelatin capsule produces projectiles that are more accurate and stable and make bright, highly visible marks that can be easily washed out with water and/or detergent and thus are ideally suitable for use in sports and games exercises.

Abstract: The invention relates to apparatus for the wet treatment of a continuous length of textile material, containing a plurality of chambers through which the length of material flows in succession, in which a fluid connecting channel through which the length of material passes in counterflow to the treatment solution is provided in the region between adjacent chambers. This results in a significant improvement in the exchange of material between the solution and the length of material.

Abstract: An apparatus for tinting a soft contact lens which is received in a fixture including an inlet and an outlet for directing predetermined fluids therethrough for engagement with predetermined surfaces of the contact lens. The apparatus comprises a carrier for carrying the fixture in a predetermined orientation; a guide arrangement for defining a predetermined path of travel; a motive assembly for propelling the carrier along the predetermined path; and a plurality of fluid application stations arranged along the path, each fluid application station including a fluid release member. The guide track and the motive assembly cooperate for aligning the inlet of the fixture with each fluid release member sequentially as the carrier travels along the predetermined path, for delivering a quantity of fluid to the fixture and the contact lens therein.

Abstract: A process for adhering a latex film to a polymeric substrate through the formation of covalent bonds at the interface of the polymeric substrate and the latex film. The covalent bonds are formed through the reaction of a cyclic imino ether group, 2-alkenyl-2-oxazoline, and a coreactive group, active hydrogen, epoxy or anhydride group, one of which is present in the polymeric substrate and the other of which is present in the latex. A product prepared from the improved method of adhering a latex film to a polymeric substrate is also included.

Abstract: A marking apparatus for coloring a lateral edge of a sheet moving along its longitudinal axis includes a marking head including a body and a tubular shaft mounted on the body for rotation about an axis of said shaft. A roller is fixedly mounted on the tubular shaft for rotation therewith. An elongated coloring element of a solid material is received in the tubular shaft for rotation therewith and has one end extending outwardly of one end of the tubular shaft a predetermined distance. An actuator is operable to move the marking head in a plane perpendicular to the plane of the sheet parallel to a plane in which the lateral edge of the sheet lies so as to bring an end face of the one end of the coloring element into contact with the lateral edge of the sheet to apply a marking thereto. The axis of the tubular shaft is disposed transversely of a path of travel of the sheet and inclined with respect to the plane of the sheet.

Abstract: An apparatus for coating and polishing a micropipette for patch recording comprises an inverse microscope having a stage for supporting a micropipette to be processed, and a pair of objectives of relatively low and relatively high magnification, respectively, which are adapted to be selectively placed into the optical path of the microscope. An air gun is positioned to supply an air jet to a pipette supported on the stage, said gun comprising heating means for selectively producing a hot and a cold air jet. An attchment comprising an electricially heatable filament is associated to the objective of relatively high magnification. The micropipette is positioned and coated under observation with the aid of the objective of low magnification and then the coating is cured by applying the hot air jet. Subsequently, the tip of the pipette is polished by the heated filament under observation with the aid of the objective of high magnification.

Abstract: A method of applying a visible mark on a hot steel slab is described. The adherence of the marking composition to the slab surface can be improved by removing locally iron oxide therefrom, followed by the step of locally cooling down the surface to prevent secondary oxide growth. This is done by first directing a water jet of high pressure at an acute angle to the slab surface immediately followed by a gentle water stream of low pressure. After this conditioning of the surface, the mark can be sprayed thereon.

Abstract: A method of making a filter media for use in a filter employed to separate water and particulate material from a liquid to be purified, such as a hydrocarbon fuel. The method includes the steps of providing a fibrous mat of material adapted to mechanically separate particulate material from a liquid to be purified, applying starch-polyacrylonitrile graft polymer in dry, granular form to the mat, and fixing the co-polymer to the mat by spraying the mat with a volatile solvent containing a small amount of water.

Abstract: In a developing head of an electrophotographic system which develops an image by bringing a liquid developer into contact with a photosensitive face of electrophotographic material, through an opening provided in the developing head, a right angle is formed between the photosensitive face and the in-flow and out-flow route for the liquid developer and a gas for removing excess developer at the opening. A pressure-reducing chamber is formed between a frame around the opening and a frame surrounding the pressure-reducing chamber, both frames tightly contacting the electrophotosensitive material. Thus, the gap between the photosensitive face and a developing electrode is reduced and high speed for the gas for removing the developer is obtained. Liquid developer exuding from the frame around the opening is captured in the pressure-reducing chamber.

Abstract: Apparatus is disclosed for treating a movable surface with material which has been removed from an erodable bar of such material. A movable applicator is adapted to brush against the bar and to transfer eroded material to the movable surface. The bar is cylindrical and mounted for rotation about its longitudinal axis to present a continuously changing portion of its periphery to the applicator. By causing the bar to rotate, the peripheries of the applicator and the bar move at relative speeds less than that which would cause objectionable dusting to occur. The bar is mounted for movement generally toward the rotatable applicator to maintain contact therebetween as the bar wears. The pressure between the bar and the applicator is maintained partially by gravitational force and partially by magnetic force.