Abstract: A plastic folding chair comprises a support frame, a main frame and a seat frame. The support frame further comprises a pair of parallel rear legs. Each rear leg is reinforced by an internal insert and may haves a rear surface incorporating a wedge that facilitates stacking.

Abstract: A retractable self rolling blind, awning or cover apparatus (11), is disclosed in which there are two or more sheets of fabric or other suitable material (17) affixed and wound conjointly about a keyway tube (12) which is supported between suitable brackets (14) mounted on a tension bar (15). The keyway tube is mounted so that it is parallel with the tension bar and the tube is fitted with a conventional spring mechanism for use with blinds, awnings and the like. The spring mechanism is pretensioned so as to cause the sheets of fabric to be rewound about the keyway tube when one or more of the sheets of fabric is released from its extended or unwound position. The keyway tube and tension bar are allowed to travel during unwinding and winding up of the fabric, preferably assisted by providing either the ends of the tube itself, or the ends of the frame in which such tube is mounted, with wheels or pulleys (16) depending on the particular use to which the apparatus is to be put.

Abstract: A method of creating a binary animation file commences with the step of selecting an initial image and subsequent images having pixels. The color pallet of the initial image (having n indexes) in converted to a colour pallet having n?1 indexes so that one of the n indexes is used as a mask index. Second and subsequent images are determined and are used to define a frameset which begins with the initial image and defines a sequence of images. The initial image is compressed using Run Length Encoding and stored to a movie file. Using the mask index, a new data array is created for the second and subsequent images. The second image is compared to the initial image on a pixel by pixel basis. The method requires the storing of differences between the first and second images in the form of difference data to the movie file, the difference data comprising an array of bytes that represents a Run Length Encoded compressed description.

Abstract: A base 12 supports small disposable containers 18 in an array. Each container holds a portion of litter 20. Containers are preferably transparent or translucent. In preferred embodiments a hinged grille 14 assists in the locating of containers within the base and serves to conceal the upper rims of the containers. A containment rim 16 is optionally provided for better keeping litter within the box. Container may be reused, or sealed with a snap-on lid 26 and disposed of without cleaning. Veterinary urine samples can be collected at home without stress to the cats. Amount of urine can also be determined even when litter has absorbed it completely by weighing the individual used container before and after soiling.

Abstract: A pulley apparatus (27) is disclosed which is adapted for use with a double hung wind. (10). The apparatus is used in pairs which are mounted in a recess (30) formed in the head (20) of the double hunt window. A pair of sash cords (25) are routed through the apparatuses and are attached to each sash so as to counterbalance one to the other, without the use of springs or extra weights.