Abstract: A method and apparatus for coating a hollow article with at least two coating materials, said method comprising the steps of applying a first coating material to the article and drying or partially curing at least the surface of the first coating before the application of the second material. Thereafter the two coatings may be fully cured together or alternatively the second coating material may be partially cured in readiness to receive a further coating. The preferred curing means is a gas flame.

Abstract: A process for providing a substrate such as a polyethylene terephthalate container with a gas barrier coating of a copolymer of vinylidene chloride is disclosed. The process includes locating the container to be coated in close proximity to one or more airless spray nozzles and impacting the outside surface of the container with a stream of a stabilized aqueous polymer dispersion such as an aqueous polyvinylidene chloride dispersion. The impacting force of the stable polyvinylidene chloride dispersion on the surface of the container is sufficient to cause selective destabilization of the dispersion at the surface interface to form a gel layer containing the polymer in the continuous phase. This gel layer serves as an adhesive layer for an overlying layer of the aqueous polymer dispersion as a continuous uniform coating. The resulting wet coating does not sag or run off.

Abstract: In a booth in which articles are carried along a pathway for treatment with sprayed material directed through nozzles or the like at the pathway, apparatus is provided for positively rotating the conveyed articles to assure uniform treatment on all sides thereof. Article supports are connected to the conveyer, each having a first portion carried by the conveyer and a second portion rotatable relative to the first portion for holding an article. A toothed member on the second portion is positively engaged by and driven by links of a link belt to rotate the second hanger portion and the article held thereon.

Abstract: A threaded fastener having an annular ring of yieldable friction material in the thread grooves thereof and bonded to the sides of the threads, in which the material is of substantially uniform thickness on the sides of the threads from adjacent the root to adjacent the crest thereof. In an embodiment of the invention two more adjacent but axially separated rings of friction material are provided, the annular zone or zones between adjacent rings having much less or substantially no friction material. In another embodiment, the friction material is applied primarily to the non-load bearing side of the threads in the ring.

Abstract: The improved method of making externally threaded friction fasteners which comprises directing a stream of particles of thermoplastic friction material onto the threaded surface of the fastener which has been heated to a temperature sufficient to fuse the thermoplastic particles so as to provide a deposit of substantial thickness in the thread grooves of the fastener extending completely around the fastener, in which the fasteners are advanced past a station at which the thermoplastic particles are directed at one or both sides of the threaded portion, and which comprises spinning the fasteners during application of the particles at a rate sufficient to cause the deposit of particles to extend completely around each fastener, and preferably to comprise at least two sequentially applied applications.

Abstract: A method and apparatus are disclosed for applying a light coating of fluid to the outer surface of a circumferential strip of one end of a cylindrically shaped article. The article is stabilized against angular axial movement while being advanced and rotated, in a planar path, through a treating zone. An airborne mist containing fine particles of the fluid is produced. This mist is transported to the treating zone and directed to impinge upon said circumferential strip. The impinged fluid mist is then leveled to achieve a uniform coating.

Abstract: A method of forming a puncture preventing layer on an inner surface of a pneumatic tire including the steps of extruding sealing material and pulverizing the extruded sealing material into fine particles for coating the inner surface with a layer of the sealing material under pressure through action of centrifugal force. For effecting the above described method in an efficient manner, there is also provided a puncture preventing layer forming apparatus which includes arrangements for holding the tire, extruding the sealing material, and pulverizing the extruded sealing material so as to be coated onto the inner surface of the tire through the action of centrifugal force.

Abstract: A device for painting, spraying, enamelling or tinting of manufactured articles in general, and for chairs in particular, includes a carriage supported for vertical movement by guides and having a pantograph arrangement for orbiting a spraying element with respect to the carriage. A support for the manufactured article is disposed in front of the spraying element and is arranged for rotating the manufactured article about a substantially vertical axis, such that spraying of the article can take place as the spraying element moves vertically and orbits and the manufactured article rotates.

Abstract: Bottle supporting and masking apparatus wherein the container or article to be coated electrostatically is carried in an inverted up-right position through an electrostatically charged particle spray zone, with the container supported by a non-conductive neck or finish masking chuck. The container is heated to render its surface conductive and four embodiments of supports are disclosed, each of which will provide a grounding of the container.

Abstract: An apparatus for coating a glass container with a layer of plastic whereby the container rotates about a horizontal axis and moves past a coating station. A plurality of liquid applicator nozzle means, positioned above the coating station, supply uncured plastic liquid to associated areas on the container. Means are provided for supplying predetermined quantities of uncured plastic liquid to respective ones of the nozzle means such that each nozzle means provides a coating of desired thickness and composition on its associated bottle area. The container is also rotated during the subsequent curing of the plastic.

Abstract: This invention relates to a coating apparatus for coating the exterior of articles passing spray nozzles which are sequentially operated to prevent coating material from passing between adjacent articles. Each spray nozzle is operated to either apply a partial coating, a complete coating or several coatings to each article. The apparatus also includes timing screw and a turret conveyor which are rapidly stopped by means responsive to article jamming, and means are provided for facilitating the removal of jammed articles from a housing of the timing screw.

Abstract: Hollow bodies, e.g. pipes, are coated with protective layers of a liquid or pulverulent material by electrostatic spraying and hardening in which the bodies are disposed horizontally and parallel to one another upon a chain conveyor and are automatically displaced transverse to their longitudinal axes. In a first stage the coating is provided on the hollow bodies exclusively of their end regions and in a second stage the coatings are applied to the end regions.

Abstract: A method and apparatus for spraying a processing fluid on the internal surface of an unfinished or green tire blank. The apparatus holds the tire in a horizontal position and first grasps the upper side wall of the tire and then pulls the tire downwardly to spread it apart so that the processing fluid can be sprayed over the entire internal surface including the beaded edge. The method includes clamping the green tire in a horizontal position by its upper bead, then grasping the lower bead and pulling the tire apart to its open position where its internal surface is fully exposed and rotating the tire as the internal surface is sprayed completely, including the beaded edges.

Abstract: A coupling includes a pair of cup-shaped members with one mounted for sliding axial motion inside the other. The outside coupling acts as a support or base which is connected to a conveyor that moves the coupling between workpiece loading and unloading means. The inside member also carries detents which move radially in and out to grasp or release the workpiece in response to axial motion between the two cup-shaped members. When combined with a conveyor, appropriate cam and follower means are provided to cause the coupling to be operated for grasping and releasing the workpiece in a timed sequence and to move the coupling from a workpiece loading station to an unloading station. The coupling and conveyor are suited for use in handling soft or easily marked materials such as plastic, soft metals, and the like. A method for workpiece handling includes steps of rotating, advancing in stop-and-go fashion while continuously rotating, and unloading.

Abstract: Apparatus for coating bottles with resin in order to prevent the explosion thereof characterized in that the bottle is held by a holder at the mouth portion and at its inner wall, so that the bottle may be invisibly coated with resin except for the mouth portion and bottom.