Abstract: An aluminum alloy sheet as a fin material for tubes of a heat exchanger, excellent in high-temperature sagging resistance and sacrificial anode property and having a high room-temperature strength, which consists essentially of:Manganese: from 0.95 to 1.50 wt. %,silicon: from 0.5 to 1.2 wt. %,zinc: from 0.1 to 2.0 wt. %,at least one element selected from the group consisting of:copper: from 0.05 to 0.60 wt. %, andmagnesium: from 0.05 to 0.60 wt. %, where, the total amount of said copper and said magnesium being up to 1.0 wt. %, andthe balance being aluminum and incidental impurities.the above-mentioned aluminum alloy sheet may further additionally contain at least one element selected from the group consisting of:chromium: from 0.03 to 0.30 wt. %, andzirconium: from 0.03 to 0.15 wt. % where, the total amount of said chromium and said zirconium being up to 0.4 wt. %.

Abstract: A unital casing structure of a portable electronic appliance such as a handheld or desktop calculator, comprising at least two panel sections having a straight boundary line therebetween and integrally coupled together across the boundary line whereby the panel sections are foldable with respect to each other about an axis extending along the boundary line between the panel sections so that the two panel sections are coupled together in a face-to-face relationship. The casing structure may further comprise an intermediate panel section bridging the two panel sections, the intermediate panel section being angularly movable with respect to the two panel sections about two axes parallel with and spaced apart across the boundary line between the panel section and being foldable with respect to each of the two panel sections about each of the two axes.

Abstract: A self-contained photoconductive belt assembly for a printer or a copier is disclosed. The self-contained photoconductive belt assembly is in the form of a cartridge or cassette, comprising a frame, first and second parallel rollers within the frame, and an endless photoconductive belt looped about and rotating with the rollers. The cassette also includes a charging unit and mounting means for detachably mounting the cassette within the printer or cassette. Desirably, the cassette also contains a photosensor for detecting the seam in the photoconductive belt. Desirably also, the cassette is slidably mounted within the housing of the printer or copier in a vertical orientation.

Abstract: A powdered cleaning composition comprising a carrier comprised of an organic fiber having a length of from 110 to 1000 microns and an amino-aldehyde resin, and adsorbed in said carrier at least one surfactant and water, is disclosed.