Abstract: A method of transforming an input pixel comprising independent and dependent color components into an output pixel comprising independent colors only or a mixture of independent and dependent colors, is provided. The method comprises the steps of resolving each dependent input color component in independent color components and combining these components with the corresponding independent input components according to a correction model to correct for additivity failure in printing inks. An apparatus for carrying out the method is also provided.

Abstract: A luge (30) for tobogganing on snow comprises an integrally moulded body member (32) having a front end and a rear end. The body member (32) comprises a pair of spaced runners (34) extending from the front to the rear ends thereof. A single bridge portion (36) extends between the runners (34) and is moulded integrally with the runners (34). A seat portion (38) extends rearwardly of the bridge portion (36) and is moulded integrally with the body member (32). A pair of handles 40 which are spaced laterally of the seat portion (38) are also provided.

Abstract: A process is provided for the removal of fluoride from a metal sulphate solution, such as a zinc sulphate solution, which presents an option for the disposal of waste treatment sludge from the aluminum anodizing industry. The fluoride is removed from metal sulphate solution by mixing the sludge with the solution for a predetermined period of time and then performing a solid/liquid separation.

Abstract: A folded single sheet mailer is provided which comprises a rectangular sheet (12) provided with transverse and longitudinal lines of perforation and transverse and longitudinal glue lines. The sheet (12) is folded onto itself along a transverse fold line (14) which is offset with respect to the center of the sheet (12). The sheet (12) is then folded along a plurality of secondary fold lines (28,30) and sealed to produce an outgoing envelope which can be mailed. The mailer includes a return envelope for use when placing an order.

Abstract: A footwear device suitable for interfacing with a sports implement, such as a snow ski, ice skate blade or in-line skate wheel system, is provided. It comprises a rigid base (2100), a heel counter (2300), a medial forefoot counter (2201) and a forefoot/midfoot compression member (2400). In one embodiment, the medial forefoot counter (2201) is adjustable in a direction medially/laterally with respect to the foot of a user into different positions relative to the rigid base. In another embodiment, the heel counter (2300) is adjustable in a direction anteriorly/posteriorly with respect to the foot into different positions relative to the rigid base. In a further embodiment, the forefoot/midfoot compression member (2400) comprises an instep counter (2420) and a support member (2410) for the instep counter.

Abstract: A storage and retrieval system such as can be used as a parking bay structure is provided which comprises a hydraulically operated skip hoist system and which includes a skip hoist shaft and a skip which is hoistable up and down the shaft. A plurality of parking bays are located around the skip hoist shaft. A pair of shuttles are located on the skip and are moveable relative to the skip for positioning vehicles on and removing vehicles from the parking bays. The shuttles are located on a rotunda on the skip which is rotatable about a vertical axis for rotating the shuttles to align the shuttles with the parking bays surrounding the skip hoist shaft.

Abstract: A tandem drive unit (24) on a flexible conveyor belt (12) comprises a primary drive pulley (20) and a secondary drive pulley (22) driven by a primary drive motor (26, 28) and a secondary drive motor (34) respectively. The primary drive motor (26, 28) has a predetermined full-load speed and the secondary drive motor (34) has a full-load speed which is not greater than a theoretical speed value for the secondary drive pulley (22) obtained by calculating the speed differential between the primary and secondary pulleys as a function of the horsepower applied to the first and secondary drive pulleys and the modulus of elasticity of the conveyor belt (12). Alternatively, a secondary drive motor with a predetermined full-load speed may be selected and the required full-load speed of the primary drive motor may be determined. A method of non-mechanically coupling a primary and a secondary drive pulley in a tandem conveyor drive of a conveyor belt is also provided.

Abstract: A process for the extraction of copper from a sulphide copper ore or concentrate comprises subjecting the ore or concentrate to a first leaching at an elevated temperature and pressure in the presence of oxygen and a lixiviant which comprises an acidic solution of chloride and bisulphate or sulphate ions to produce an insoluble basic copper sulphate. The basic copper sulphate so produced is leached in a second leaching preferably at atmospheric pressure with an acidic sulphate solution to dissolve the basic copper salt to produce a leach liquor containing copper sulphate in solution. The resulting leach liquor is subjected to solvent extraction to produce a copper concentrate solution and a raffinate comprising protons and bisulphate or sulphate ions in solution.

Abstract: An outboard motor adaptor (10) comprises an upper housing (12) provided with a connection bar (24) having formations (28, 30) thereon for engaging with bar studs (44) on a chainsaw housing (42). A stem (14) extends from the upper housing (12) and a lower skeg and propeller portion (16) is provided on the opposite end of the stem (14). The skeg and propeller portion (16) is provided with a propeller (32) thereon. A drive sprocket (22) is provided on the upper housing (12) adjacent the bar (24). The drive sprocket (22) is operatively connected to the propeller (32) for driving the propeller (32). A drive chain (26) extends around the drive sprocket (22) and the connection bar (24). A space (48) is provided between the bar (24) and the drive chain (26) at the location opposite the drive sprocket (22) for receiving a chainsaw sprocket (46) of a chainsaw motor in the space (48) to engage with the drive chain (26), thereby to drive the drive sprocket (22) and the propeller (32) through the drive chain (26).

Abstract: A method for the cultchless cultivation of mollusks comprises placing the mollusks in an elongate bag of mesh material, which is preferably about 100 feet long. The bag has a longitudinal slit therein for providing access to the bag. The bag is suspended under tension in an underwater off-bottom location whereby the slit is maintained in a closed position by the tension. The invention also includes apparatus for raising the bag into an elevated position above the water for husbandry and harvesting purposes. In one embodiment, the apparatus comprises a raft provided with a pair of spiked rollers thereon for moving the bag along the top of the raft.

Abstract: Playthings, such as dolls (10, 12), figures or toy animals (22) are provided. The playthings are provided singly or in pairs. The playthings have limbs, such as arms, or other appendages such as tails or trunks, extending from their bodies, the limbs or appendages being provided with connection elements, such as magnets (14), for removably attaching limbs together to simulate "hand holding" or to attach to metal surfaces or to "pick up" metal objects. In alternative embodiments the magnets are arranged so that they will repel each other so that certain limbs or appendages will not attach to each other. In another embodiment the playthings can be manipulated by the thumb and fingers, such as in the form of recesses (44) provided in the clothes or by strings (38), such as in the form of a marionette (46).

Abstract: A luge (10) for tobogganing on snow comprises an integrally moulded body member (12) having a front end and a rear end. The body member (12) comprises a pair of spaced runners (14) extending from the front to the rear ends thereof. A single bridge portion (16) extends between the runners (14) and is moulded integrally with the runners (14). A projection (26) extends rearwardly of the bridge portion (16) and is moulded integrally with the body member (12). The projection (26) is provided with a formation for engaging with snow when the body member (12) is tilted rearwardly, thereby to effect braking of the movement of the luge (10) over the snow.

Abstract: A seedling container comprises a body member which is provided with a plurality of longitudinal cavities for seedlings. Each cavity is provided with a plurality of circumferentially extending barriers spaced along the length of the cavity. Each barrier preferably comprises a V-shaped recess in the cavity surface to trap the tip of a root therein.

Abstract: In a process for the treatment of electric arc furnace (EAF) dust, the dust is first subjected to atmospheric leaching with a ferric chloride solution and thereafter subjected to treatment in an autoclave at an elevated temperature and pressure for conversion of low temperature stable goethite (FeO.OH) to a filterable crystalline hematite (Fe.sub.2 O.sub.3) in an acidic chloride solution. Zinc is recovered from the solution by solvent extraction using a solvating extractant followed by stripping and zinc recovery by electrolysis of zinc chloride solution. Lead is separated from the solution by cooling to precipitate lead chloride.

Abstract: Toggle apparatus for attachment to a tractor (10) or other pulling device having a main line cable (12) for attachment to the pulling device (10), a stopper (20) on the cable (12) and a toggle (22) which is retained on the cable (12) by the stopper (20). The stopper (20) is dimensioned to allow the passage thereover of slider rings (16) for the removal or mounting of the slider rings (16) from or onto the cable (12). The toggle (22) is dimensioned to retain the slider rings (16) against the stopper (20) on the cable (12). The toggle (22) is movable into a position in which it is in alignment with the cable (12) to permit the slider rings (16) to pass over the toggle (22) in the aligned position for removal of the slider rings (16) from the cable (12).

Abstract: An apparatus (10) for the trenchless replacement of a pipe comprises a frame section (12) for location above a service pit (22) exposing one end of an underground pipe section (20) to be replaced and an extendable leg member (14) on the frame section (12) for extending into the service pit (22). A support member (18) is provided on the leg member (14) for supporting the leg member (14) against the inside of the service pit (22). A cable guide member (16) is located on the leg member (14) for guiding a pulling cable (36) extending through the pipe section (20) to be replaced up along the leg member (14). A winch (30) is provided on the frame section (12) for exerting a pulling force on the pulling cable (36).

Abstract: A process for the extraction of copper from a sulphide copper ore or concentrate comprises the steps of subjecting the ore or concentrate to agitation leaching at an elevated temperature and pressure to obtain a resulting acidic leach liquor containing dissolved copper and reducing the acidity of the resulting acidic leach liquor by effecting percolation leaching of a bed of low-grade copper ore or granular rock with the acidic leach liquor. The agitation leaching is carried out in two stages, i.e. a first leaching step at an elevated temperature and pressure in the presence of oxygen and an acidic chloride solution as lixiviant and a second leaching step at atmospheric pressure with an acidic sulphate solution. In a preferred embodiment, the bed of low-grade copper ore or granular rock is in the form of a heap and the percolation leaching comprises heap leaching. Copper is extracted from the leach liquor by solvent extraction.