Abstract:
A method of coating heat sensitive materials with powder paint is described, which is based on repetitive heating cycles of paint coating by radiation example infrared, interspersed with cooling cycles, which there is a temperature difference between the paint coating and substrate such as to allow the filmation and subsequent curing of the paint without damaging the substrate.
Abstract:
Process and apparatus for forming a plastic coating on a metal strip. A metal strip is cleaned, surface treated, coated with an electrostatically charged plastic powder in an enclosed chamber using a plurality of spray guns positioned on both sides of the strip, inductively heated to above the melting point of the powder, and maintained in an infrared heater until the fused powder is flowed into a coating having a smooth surface and a uniform thickness. Thermoplastic and thermosetting coatings, having thicknesses of at least 10 microns formed using total induction and infrared heating times of less than 60 seconds, can be fabricated without cracking.
Abstract:
A method and apparatus for applying a pattern to a continuously advancing web with a foam containing treatment medium. The pattern may be generated in the foam prior to or after the foam is transferred to the web. In one embodiment, the pattern is generated using two foam feeding devices arranged to form a patterned layer on a revolving element positioned over the web. The forward velocity of the web and the speed of rotation of the revolving element are controlled to obtain the desired pattern effect on the web.
Abstract:
Film coating and biaxial orienting apparatus comprising a first uniaxial stretching unit for machine direction orientation of the film, a coating device to provide a liquid coating composition in a center band on the film, a second uniaxial stretching unit for transversely orienting the coated film and having edge holders for gripping the film, and a heater for curing the coating under constrained conditions during setting of the film.
Abstract:
The present invention concerns a method and an apparatus for accelerating the drying and/or curing of filler material, primer and top-coatings in connection with touch-up work on car bodies.According to the apparatus of the invention, grinding, filling and spraying are accomplished in one and the same booth, whereupon a carrier containing infra-red heat radiators and/or heating-elements and/or nozzles is traversed over the car, whereby controlled heat-energy is supplied to the surface accelerating drying and/or curing process of the surface treatment material. For supplying sufficient heat-energy to the front and rear parts of the car, special reflectors are located in front of and behind the car for reflecting heat-radiation from the carrier. The carrier is divided into sections with controlled, separate energy-supply and ventilation-air both when heat-transfer is accomplished and when the carrier is located in a parking recess, from which ventilation-air passes via specially designed slots out into the booth. The ventilation-air is conducted along the infra-red-radiators and/or heating-elements/air nozzles in a laminar air flow towards the car. The ventilation air is ventilated out from the sides and the floor of the booth. The travel of the carrier over the car body and the energization of the heating is programmed with respect to a given body configuration and with respect to the touch-up work being done in order to minimize wasteful use of energy to otherwise heat parts which do not require to be heated.
Abstract:
A method for spin coating the interior of a generally rigid or semi-rigid plastic hollow article, such as a container or parison, with a synthetic organic resinous material to provide a protective coating therein. The method comprises placing a quantity of a dispersion of synthetic organic resinous material, preferably a latex or solution, in a hollow article, spinning the article at high speed thereby causing centrifugal force to distribute and hold a coating of the dispersion uniformly on the interior surfaces of the same and then heating the coating while continuing to spin the article. The result of the spin coating method is an article with a substantially uniform interior protective film providing improved article characteristics such as gas and liquid barrier properties, color and appearance, taste and flavor protection and the like.
Abstract:
An apparatus for successively applying to the surface of a dielectric substrate, a plurality of parallel microthin coatings with the adjacent edges forming a fine edge overlap, each coating formed from a flowable viscous plastic material having dispersed therethrough particles that exhibit discrete electrical properties so that the adjacent coatings forming the thin line overlapped junction between them have uniform and improved electrical characteristics across the junction between the different plastic materials.