Abstract: A door assembly suitable for relatively large openings such as greenhouse ends which comprises upper and lower door panels hinged together at the middle of the door with the upper panel hinged to the upper door frame. The door is counter-weighted and can readily be raised and lowered, even under windy conditions.

Abstract: An aluminum coated carbon article or composite, and process therefor having aluminum chemically bonded to carbon via an interface of a metal monocarbide formed in situ when an intermetallic phase comprising aluminum and a metal capable of reacting with carbon to form a metal carbide is reduced by carbon to aluminum and a metal carbide, the metal selected from the group consisting of tantalum, titanium and hafnium.

Abstract: Coke intended for use in graphitized articles such as graphite electrodes is thermally desulfurized and made more ordered by heating in the absence of air at a temperature between about 1600.degree. C and 2200.degree. C for a period of at least one hour before the particles are mixed with binder. Coke processed in this manner yields graphite electrodes of superior flexural strength and having lower coefficients of thermal expansion.

Abstract: A low density abradable seal produced by depositing metallic particles onto a binder coated substrate and then heat treating the coated substrate to produce a porous coating structure having excellent erosion and oxidation resistance and abradability characteristics.

Abstract: A non-woven fibrous web is continuously air-laid by directing a fluid stream of fibers from a rotating spinner against the inner surface of a moving foraminous belt which travels in an arc substantially around the circumference of the spinner, with suction being applied to the outer surface of the foraminous belt to facilitate uniform fiber lay-down and to remove the fluid.

Abstract: A method of making a high void porous sheet by sintering metallic coated hollow carbonaceous particles and sheets made by such method.

Abstract: A high temperature cement for carbon articles comprising aluminum, and tantalum or silicon, in a specific weight percent ratio such that when heated in an inert atmosphere, the tantalum or silicon will react with the carbon in the articles to be joined to form, in situ, tantalum carbide or silicon carbide, respectively, in the presence of aluminum.

Abstract: Vapor, volatile fumes and other contaminants are filtered from an air stream by passing it through a bed of filter particles, which may be coke and using the contaminant coke particles in the processing of electrodes.

Abstract: A moving belt which is tubularized and detubularized or otherwise shaped as by moving it through right angle turns is relieved of induced stresses and strains by passing the belt over a belt contouring device such as a set of coaxial pulleys of varying diameters with a preselected profile such that it distorts the belt in a manner which compensates for the distortion of the previous tubularization or the like.

Abstract: Abradable seal composite structure having a porous, abradable ceramic surface layer which is resistant to high temperature oxidation and a metallic bottom layer capable of being bonded to a metallic substrate, with at least two intermediate layers consisting of ceramic/metal mixtures. The intermediate layer next to the ceramic layer has the highest ceramic content, with the remaining intermediate layers having progressively lower ceramic content and correspondingly higher metallic contents. The composite is made by laying up the layers in wet paste form and then drying them, after which the composite can be heated to bond it to the metallic substrate.

Abstract: A non-woven fibrous web is continuously air-laid by directing a fluid stream of fibers from a rotating spinner against the inner surface of a moving foraminous belt which travels in an arc substantially around the circumference of the spinner, with suction being applied to the outer surface of the foraminous belt to facilitate uniform fiber lay-down and to remove the fluid.

Abstract: A process for producing powdered chemically crosslinked poly(alkylene oxide) of molecular weight of at least 100,000 which comprises contacting poly(alkylene oxide) with a suitable crosslinking agent in the presence of a free radical catalyst, and a liquid medium containing a solvent-nonsolvent mixture for said poly(alkylene oxide) wherein the non-solvent portion constitutes at least 35% and up to 100% by weight of the liquid medium, at a temperature and for a time sufficient to crosslink said poly(alkylene oxide).

Abstract: The facile extrusion of ethylene oxide resins has been effected by employing water as an extrusion aid.