Abstract: A new and improved automotive heat exchanger and a method of assembling tubes in a header of a heat exchanger comprising, shaping the ends of non-circular cross section tubes into a substantially circular cross section, forming collared openings of substantially circular cross section in a header wall, inserting the tube ends into the openings, welding and bonding the tubes to the header wall.

Abstract: An offset printing plate comprising a steel base with two layers of chromium, said layers having a combined thickness no more than 1.mu..

Abstract: A continuous paper band folding apparatus to form paper sheet piles is disclosed, which apparatus allows the formed folds to be squeezed and the paper band to be exactly cut in order to achieve separate piles of paper sheets. The apparatus comprises two rotating shafts carrying blades which engage the paper band and provide to form a fold therein by the particular radial and longitudinal arrangement of the blades forming a cusp symmetric with respect to the point of engagement with the paper band. Blades are rotated synchronously with the feed of paper band so that initially a natural loop is allowed to be formed in the paper band when the blades do not interfere therewith. Then the vertex of the cusp formed by the blades engages the paper band, thus causing it to be folded back.

Abstract: A corrosion resistant coating and process comprises the following layers applied in sequence over a ferrous metal substrate: a micro-throwing nickel-zinc alloy plating; an optional galvanically protective zinc metal plating; a zinc-nickel alloy plating containing 5 to 30 weight percent nickel; and an organic coating such as paint. The coating is preferably used with steel drill screw fasteners wherein it also reduces installation torque and drill time.

Abstract: A tool for cutting a workpiece comprising a tool body; means on the tool body for securing the workpiece; a saw blade movably supported on the body for cutting the secured workpiece, the saw blade having a plurality of cutting teeth movable in a sawing direction and a feeding direction in a cutting plane extending through the workpiece; and a bushing on the tool body rotatable about an axis normal to the cutting plane, the bushing being engagable on its periphery by the saw blade teeth and rotatable thereby, after cutting of the workpiece, to restrict movement of the saw blade in the feeding direction while permitting movement of the saw blade in the sawing direction. In the preferred embodiment the bushing includes teeth on the periphery which are of comparable size and spacing to the teeth of the saw blade to clean the latter. The bushing may be made of a bronze porous powder metal which is impregnated with a lubricant for lubricating the saw blade teeth.

Abstract: Process for the plating of through-holes in an epoxy printed circuit board base material in the manufacture of printed circuit boards. The treatment process is designed to increase adhesion between the epoxy board material and a subsequently deposited metal plate. The process is characterized, in part, by the use of an activated permanganate solution.

Abstract: A lock pin for a badge shell having a round periphery and inwardly bent skirt along the periphery forming an open back, the lock pin being made of a length of resilient wire having a substantially straight fastening portion with a lower pointed end on the wire first free end to fasten the badge to a garment. The resilient wire includes a shell securing portion connected to the upper end of the fastening portion extending in a closed generally planar path around the fastening portion and terminating in the wire second free end comprising a locking tab extending outwardly from the plane for removably locking the second free end to the fastening portion upper end, the locking tab further adapted to bear against the inward side of the shell securing portion to resist removal of the lock pin from the badge shell. The shell securing portion has first and second arcuate segments conforming substantially to the curvature of the shell inner periphery and extending approximately 90.degree.

Abstract: A process for treating an emulsion or solution of water and oil or the like comprising the steps of (a) contacting said emulsion or solution with an inorganic salt; (b) contacting said emulsion or solution with a synthetic polyelectrolyte flocculant; and, after steps (a) and (b), contacting said emulsion or solution with a demulsifying agent whereby said emulsion or solution is split into separate oil and water phases for subsequent separation. Preferably the salt is sodium chloride, the flocculant is an anionic synthetic flocculant having a molecular weight of six to eight million and a charge of three (3), and the demulsifying agent is sulfuric acid. The process may be used with emulsions or solutions which have previously been processed by ultra or micro filtration.

Abstract: An explosive actuated hand tool for cutting clean holes in sheet material, wherein the explosive force causes a piston to pull a punch toward a die, the material being located between the punch and die. Convenience and safety features include means for arming the firing mechanism by rotation of a locking ring which secures a cartridge in its chamber and means to prevent movement of a firing pin unless a lever has been moved from an OFF position to the ON position.

Abstract: A self adhesive wallboard tape comprising a substrate containing longitudinally spaced holes in the center of said substrate and an adhesive coating on one side of said substrate, the center portion of said substrate being adhesive free.

Abstract: A mixture capable of forming a hard, bonded cement composition when admixed with water comprising magnesium oxide; a water soluble phosphate; a retarder selected from the group consisting of polycarboxylic acids, polyphosphonic acids, and salts of such acids; and an essentially inert aggregate filler. The retarder is preferably selected from the group consisting of citric acid, sodium citrate (monobasic), sodium citrate (dibasic), tartaric acid, trimellitic acid, nitrilotriacetic acid trisodium salt monohydrate, Dequest 2000 and Dequest 2006. The phosphate is preferably monoammonium phosphate and the filler is preferably silica sand and fly ash which are essentially free of calcium oxide and calcium carbonate. The mixture is admixed with water at a job site and used to fill holes in roads and other structures and is capable of being worked for at least seven minutes before initial set.

Abstract: A frame assembly for a building opening such as a roof hatch or scuttle, wherein frame elements and integral or separate connecting elements therefor are adapted for on-site assembly and leak-proof securement to a building roof or wall, both manufacture and installation being relatively uncomplicated operations and the resulting structures being adapted to meet high standards of performance.

Abstract: Packing system of products for topical application such as emulsions, creams, unguents, pastes, salves and so on, which avoids the phenomenon of the habitation and provides the arrangement in layers in the same container of two or more products, either in different or equal amount but of different composition and/or concentration of active substances which may be of different type, appearance, color and so on and aim at the same either dermatological or cosmetic or pharmaceutical purpose.The products arranged in layers are delivered and used one after the other in order to either alternate their application or to use progressively increasing concentrations in order to avoid the habituation in case of either continuous or periodic applications.

Abstract: A process for making self-threading screw fasteners wherein only the cutting portions of the tip of the fasteners are hardened. The unhardened portions of the fastener remain ductile and are not subject to hydrogen embrittlement during subsequent plating to improve corrosion resistance. The process preferably comprises applying a radiation curable plastic coating over the drill tip followed by plating of a thin (minimum 0.0005 inch, 0.013 mm) layer of copper. The cured coating is then removed leaving an unplated tip. The screw is then subjected to a hardening process, wherein only the portions of the screw without the copper layer are hardened. The screw may then be plated conventionally with a corrosion resistant metal. The invention is further directed to the product of the process. A second embodiment for making screws suitable for extreme corrosion resistance is also described.

Abstract: A clip for receiving and retaining a plug having means for securing the same to a support and including a back wall, side walls with surfaces shaped and spaced to engage sides of the plug, the side walls having top and bottom flanges and a slanted wall surface extending between said flanges.

Abstract: An improved quick clamping device to hold armored cables such as BX cable for cutting. The device includes a handle for receiving the cable which is preferably U-shaped and which defines a cable receiving channel. A clamping handle is hingedly attached to one end of the cable receiving handle. A clamping stud with a two-sided stop adjustable along its length is slidably held between the clamping and receiving handles such that when the handles are compressed the clamping stud projects into the cable receiving channel and clamps the cable. A spring biasing means on one side of the stop serves to hold the handles in the open, unclamped position prior to use. A resilient means such as a bowed spring steel washer is provided on the other side of the stop which compresses as required to prevent excess clamping forces from being generated which might damage the clamp. A saw is preferably mounted on a pivoted saw handle to cut the cable which it is clamped.

Abstract: A mixture capable of forming a hard, bonded cement composition when admixed with water comprising magnesium oxide; a water soluble phosphate; a retarder selected from the group consisting of polyphosphonic acids, and salts of such acids; and an essentially inert aggregate filler. The retarder is preferably selected from the group consisting of Dequest.TM. 2000 and Dequest.TM. 2006. The phosphate is preferably monoammonium phosphate and the filler is preferably silica sand and fly ash which are essentially free of calcium oxide and calcium carbonate. The mixture is admixed with water at a job site and used to fill holes in roads and other structures and is capable of being worked for at least seven minutes before initial set.

Abstract: A corrosion resistant coating and process comprises the following layers applied in sequence over a ferrous metal substrate: a micro-throwing nickel-zinc alloy plating; galvanically protective zinc metal plating; a zinc-nickel alloy plating containing 5 to 30 weight percent nickel; and an organic coating such as paint. The coating is preferably used with steel fasteners wherein it also reduces installation torque and drill time.