Abstract: An air diffuser that injects triangular columns of air into a space to be air conditioned. The triangular columns of air entrain air into their wake and set up a cross flow of air in a direction normal to the path of travel of the air in the triangular columns. In a first embodiment, a plurality of elongate, triangular nozzles are disposed at an angle in penetrating relation to a ceiling so that a first end of each nozzle is above the plane of the ceiling and a second end of each nozzle is below the plane. A housing in fluid communication with a source of air to be introduced into the space is positioned above the ceiling in housing relation to the respective first ends of the nozzles so that air introduced into the housing under positive pressure is constrained to exit the housing through the nozzles. In second and third embodiments, the nozzles are of differing geometrical configurations in transverse section and do not penetrate the plane of the panel within which they are mounted.

Abstract: An air diffuser comprising a base and first, second, third and fourth side walls extending from the base to form a hollow shell. At least one of the side walls includes a plurality of bores therein forming multiple discharge tubes. The base and side walls form a plenum into which conditioned, pressurized air is supplied. The conditioned air is discharged from the plenum through the tubes in columns. Screws or other fastening devices may be used to secure the hollow shell to a surface. The multiple discharge tubes are each spaced from the surface and have longitudinal axes oriented in angular relation to the surface for entraining ambient air from above and below each column of air being discharged for mixing of ambient air with each column of the discharged conditioned air.

Abstract: Olefin polymer films composed essentially of a copolymer of a major proportion of ethylene with a minor proportion of a higher .alpha.-olefin monomer and an effective amount of a tackifying agent are provided which have unusually high Elmendorf tear strength in the machine direction, a good balance of machine direction to transverse direction Elmendorf tear strengths, and excellent cling properties. Such films are exceptionally well suited for use as a stretch/cling film in various packaging and palletizing applications.