Abstract: The removal of arsenic, from aqueous liquids by adsorption on alumina, is facilitated by selecting the alumina adsorbent to have a particle size below about 200 micrometers, forming a slurry of the alumina and aqueous liquid and agitating the slurry. It has been found that alumina can be selected to have a particle size sufficiently small, or preferably a combination of both particle size sufficiently small and pore size and number sufficiently large, to achieve 50 ppb or less arsenic within about 2 hours treatment. The alumina with adsorbed arsenic is separated from the slurry by steps preferably comprising microfiltration. A precipitation pretreatment can be combined with the slurry treatment e.g. to handle more concentrated solutions.

Abstract: The invention relates to an apparatus for relocating sedimentary materials particularly from the bottom of water channels. The invention utilizes a water jet fluidizer to displace sedimentary materials and to suspend them in a water flow. The water flow containing the suspended, dispersed sedimentary material is contained within a shaped duct means and re-directed as a uni-directional flow, so that re-deposition of the displaced sediments is controlled. The apparatus includes a manifold having parallel water jets spaced apart in a transverse direction along it; a parallelogram linkage for controlling the position of the manifold; a hose for supplying water under pressure to the manifold; and a duct means arranged opposite the manifold for directing the flow of dislodged sedimentary material in suspension. The apparatus preferably is supported on wheels and is controlled by the linkage from a boat. In shallow water, the device may be supported on a hand controlled trolley.

Abstract: A composite forming fabric, formed from two separate interconnected woven layers, for use in a paper making machine. The machine side layer is a single layer N by 2N weave, such as a six-shed, 6.times.12 weave. Within the weave repeat pattern the warp yarns form two distinct floats of unequal length, and the weft yarns form floats of equal or unequal length. The weft floats are located substantially in a single plane, on the machine side of the composite fabric. The weave design provides the composite fabric machine side layer with improved wear potential and guiding properties, without adversely affecting its drainage properties. The paper side fabric layer may be of any woven construction; a plain weave or 2/1 twill is preferred.

Abstract: The invention relates to a device for protecting a shin and ankle from blows and for supporting the ankle, allowing an athlete to participate in sports with an ankle injury. The device attachable to a shin, ankle and foot for protecting the shin and ankle from blows and for supporting the ankle against inversion and eversion, comprises a body comprising a shin protecting portion connected to an ankle supporting portion, the ankle supporting portion comprising two sides for positioning on the medial and lateral sides of the ankle respectively; means, such as straps, for securing the two sides of the ankle supporting portion of the body to the ankle; and a U-shaped support extending between the two sides of the ankle supporting portion of the body for passing under the foot. Preferably, the body comprises a hard outer shell and an inner pad. The shin protecting portion and the ankle supporting portion may be flexibly connected. The device avoids interference between conventional shin guards and ankle braces.

Abstract: This invention discloses a fiber suitable for a papermaker's forming fabric, comprising a blend of 60 to 90% by weight of a polyethylene terephthalate, together with 40 to 10% by weight of a thermoplastic polyurethane, which may be an ester or ether-based type. Additionally, it is contemplated that the blend may contain up to 5% by weight of a hydrolysis stabilizer. The high abrasion resistance of these blended monofilaments makes them particularly advantageous for use in replacing the nylon-6 and nylon-66 monofilaments currently used in paper machine forming fabrics.

Abstract: A fence system including posts for supporting horizontal rails and infill material such as panels or wooden boards. The posts comprise spaced-apart channel members of substantially C-shaped cross-sections having channels facing inwardly. The rails extend between the channel members of the post. A connector having side edges bent to engage interned flanges of the channel members is held in place by a bolt and washer. An alternative connector in the form of a band clamps at least the upper ends of the channel member of the post together and preferably supports the rails. The lower ends of the channel members of the post are preferably set in concrete or secured to a base.

Abstract: During the portaging of a canoe by a single canoeist, discomfort may be caused to the shoulders and neck of the canoeist. The discomfort is due both to the pressure exerted by the portaging thwart on the shoulders and neck of the canoeist and to the rotation of the canoe and hence the portaging thwart relative to the shoulders and neck during the ascent or descent of inclines. Much of the discomfort is alleviated by the present invention which provides a portaging thwart capable of axial rotation relative to a canoe. In this way, relative to the canoeist, the portaging thwart remains stationary while the canoe rotates, thereby permitting the canoeist to place the portaging thwart at the optimal angle to his or her shoulders and neck, independently of the angle of the canoe. In one embodiment of the invention, the portaging thwart is mounted in bearings attached to the gunwales of the canoe at approximately the mid point thereof.

Abstract: A structure assembled of aluminum alloy extrusion and sheathing such as composite particle board for use as porches, balconies, or the like. The parts include posts, a frame having corner fasteners, and channel type beams supported by the frame and secured to the frame by fasteners in a manner requiring a minimum of on-site drilling of holes in the aluminum alloy parts.

Abstract: The fence, sound barrier, guardrail or the like includes line posts and top and bottom rails for supporting panels, wire mesh, boards, pickets or fence material. A fence post cap and bracket is provided on the line posts, secured to the line post, and extending beyond the post so that a downwardly depending flange on the outer edge of the cap engages an outer side wall of the rail. The fence post bracket which is also secured to the line post supports the top rail and prevents upward displacement of the rail on the line post.

Abstract: A pin seam for use in woven papermaking fabrics, wherein more than 50% of the warp strands from each of the fabric ends are used to form the pintle retaining loops. The loops formed at one of the opposing fabric ends have an "S" orientation, while the loops formed at the second opposing end have a "Z" orientation, thereby allowing the two sets of pintle retaining loops to interdigitate easily. The resulting seam is strong, easily installed on the papermaking machine and has a reduced propensity to mark the paper web. The invention is particularly applicable to fabrics woven using 3-shed weave patterns or integral multiples thereof.

Abstract: A process for the recovery of at least a major proportion of the useful metallic iron values in small sized ferrous slags and drosses in which the slags and drosses are subjected to at least one grinding step in a wet grinding mill. Depending on the size of the slag and dross particles, either a peripheral end discharge rod mill or an axial discharge ball mill is used. In a preferred configuration, two wet grinding stages are used, comprising a peripheral end discharge rod mill followed by a ball mill. Products with different metallic iron contents are recovered by interposing screens with suitably sized openings between and after the grinding mills. This process makes it possible to recover at least about 80% of the metallic iron in the feed material.

Abstract: A method for making security documents using an electro photographic printer, particularly a photocopier or laser printer, includes the step of exposing the printed image to an accelerator, in liquid or vapour form. Under the influence of the accelerator, a second dye contained in the toner, used in producing the image, migrates into the document, thereby producing a second image in the paper in registration with the printed image. The process is applicable to images created on paper, security paper, and synthetic papers.

Abstract: A carrier for circular articles such as hockey pucks, baseballs, softballs, golf balls, tennis balls, and the like, of integral construction in resilient material comprises an elongated hollow body having two side walls, a rear wall, and a partially open front wall. The rear wall has holes regularly spaced of a dimension to receive a portion of the circular object. Narrow flanges which define the partial front wall have notches associated with cooperating holes in the rear wall. The notches define a space to receive a portion of the circular object. The object is held in place secured by the hole in the rear wall and the notches in the front wall. Objects can be introduced or removed by spreading the side walls to permit the object to pass through the partial front wall. The resiliency of the material will then close the carrier securely around the object.

Abstract: A rack for hanging room sized carpets in show rooms. The rack has a plurality of uprights, each of which has a horizontal arm including a brace capable of supporting a hanging carpet. The arm is adapted to be raised and lowered by a cable entrained on pulleys and moved by a worm drive type winch operated by a portable drive means such as an electric drill. The cable and winch are mounted in the channel of each upright.

Abstract: A fluid distribution manifold comprises a housing having a port plate having fluid inlet and outlet openings extending therethrough, valve means disposed in the housing for movement between a closed position whereat the valve means engages one side of the port plate and sealingly closes each of the openings and an open position displaced from the port plate whereat the valve means opens the openings and permits fluid communication therebetween, and means for urging the movable valve means towards the closed position.

Abstract: An extendable sign of suitable resilient plastic designed to hang on a vehicle window and be visible to passing traffic. The sign is composed of multiple panels interconnected by sliding means which allow the sign to be retracted for convenient storage and extended to display a preprinted message. A bracket attached to a first panel has a hook portion for engaging the upper edge of a vehicle side window, and a support portion to aid in maintaining the sign in an extended position from the side of the vehicle.

Abstract: A die press unloader which retrieves material from beneath the lower die of a pair of dies mounted in a die press. The material which is retrieved will have passed through the lower die, and can comprise either scrap, for example in making perforated strip or product, for example in making shaped blanks from a strip. The unloader utilizes a combination of gravity and a mechanical arm, preferably actuated by a double-acting air cylinder, the movements of which are controlled by the press itself.

Abstract: This invention discloses a paper-maker's forming fabric wherein some of the yarns are melt-extruded monofilaments, that are a blend of 60 to 90% by weight of a polyethylene terephthalate, together with 40 to 10% by weight of a thermoplastic polyurethane, which may be an ester or ether-based type, Additionally, it is contemplated that the blend may contain up to 5% by weight of a hydrolysis stabilizer. The high abrasion resistance of these blended monofilaments makes them particularly advantageous for use in replacing the nylon-6 and nylon-66 monofilaments currently used in paper machine forming fabrics.