Teck Cominco Metals Ltd.

Mitek Holdings, Inc.

Cominco, Ltd.

Teck Metals Ltd.

Albert M Vincze

John V Marlow

Thomas L Oswald

Rajindra Singh

Douglas G Clark

Robert W Fritts

Theodore J Seymour

Paul Niessen

Victor Nasri Saleh

Kenneth Henning Runo Gustavsson

Gerald P Lewis

Nai-Yong Tang

Patrick Culkeen

Malcolm John Dewar

Derek William Russell

Kenneth Henning Gustavsson

Thomas Lester Oswald

A process and apparatus for continuously mixing and applying paste to battery grids for use in lead-acid battery systems, in which particulate lead oxide, water and sulphuric acid are reacted in an elongated mixer having a mixing to conveying ratio of about 65:35 to 80:20 with controlled reaction temperature for an exit product temperature in the range of above 60&#xb0; C. to about 80&#xb0; C. Additives including reinforcing fibers can be added in an amount up to 0.6 wt % of the lead oxide and carbon and graphite powder can be added in an amount up to 6 wt % of the lead oxide.

Method and apparatus for continuously mixing battery pastes

Battery grid

A method and apparatus for continuously producing pasted positive and negative electrode plates from pasted lead or lead alloy expanded, punched or cast metal mesh strip for use in lead-acid batteries without the use of paper barriers. The heating of cutting devices such as roll-mounted die-cutters to a predetermined temperature range of at least about 150&#xb0; C., preferably about 160 to 300&#xb0; C., and more preferably about 180 to 210&#xb0; C., eliminates sticking of the paste on the pasted metal mesh strip to the cutting devices and obviates the need for the paper barriers.

Paper elimination in the production of battery plates

A method of producing lead alloy strip for fabrication of positive and negative electrodes of a lead-acid battery by extruding a lead alloy at elevated temperature to produce a lead alloy strip having a desired profile and rapidly cooling the extruded strip to acquire a desired microstructure. Battery grids produced from the lead alloy strip have reduced vertical growth and enhanced resistance to corrosion.

Continuous extruded lead alloy strip for battery electrodes

The strip is cast on a chilled casting surface of a rotating drum from a pool of the molten metal contained in a tundish having a graphite lip insert seated therein cooperating with, the casting surface adjacent to the tundish to form and contain the pool of the molten metal. The tundish preferably contains a feed chamber, a return chamber, and a diverting chamber, the feed chamber and the diverting chamber effectively removing turbulence from the molten feed and the return chamber having a vertically adjustable weir dividing the return chamber from the diverting chamber for controlling the surface level of the pool of molten metal in the diverting chamber and the lip insert and for diverting a flow of molten metal to the return chamber. A preferred lead alloy is a low antimony-lead alloy which is cast into strip and is subjected to a heat treatment to permit expansion and shaping in subsequent production of expanded mesh battery grids. The battery grids produced by the method have improved electrochemical properties such as corrosion resistance and resistance to growth.

Method and apparatus for producing metal strip

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Oakville, Canada

Albert M Vincze