Abstract: Apparatus for loading bulk materials from a storage bin into a truck body. An enclosure is defined by flexible rubber movable walls of which at least three are horizontally displaceable into contact with the corresponding sides or edges of the body of the truck to be loaded. Exhaust fans cause a negative pressure inside the enclosure sufficient to urge the movable walls into sealing contact at the corners of the enclosure and against the sides or edges of the truck body. At the end of loading, detectors automatically cause the horizontally displaceable walls to move back out of contact with the truck body to facilitate ingress and egress of the truck.

Abstract: A seal assembly is disclosed for a rotary kiln such as those used in cement manufacture. The seal assembly is interposed between a first part rotating with the rotating cylinder of the kiln and a second, stationary part having a cylindrical surface coaxial with the rotating cylinder. The seal assembly comprises an annular array of graphite elements in rubbing contact with the cylindrical surface and generally radial sides having overlapping rabbets restricting flow of gas between adjacent elements, and a flexible clamping cable or the like bearing against the outer surfaces of the graphite elements for clamping them against the cylindrical surface.