PURPOSE:To cut quickly oxide ceramics to an optional shape with good accuracy by using a laser by coating preliminarily a metal oxide which is decreased in the m.p. by the eutectic reaction with ceramics on said ceramics along the cutting surface thereof. CONSTITUTION:A metal oxide 2 of TiO2 or the like which induces an eutectic reaction with the ceramics 1 is coated preliminarily on the front and...

Apparatus for comminuting industrial and/or bulky domestic waste materials has an upright housing with a funnel-shaped section located above a stationary counterknife which cooperates with a single rotary knife therebelow or with two rotary knifes respectively disposed thereabove and therebelow. The inner side of the funnel-shaped housing section has a downwardly sloping spiral surface which advan...

The present invention is concerned with the problem of preventing dust-formation on electrode plates of lead. The problem is solved by applying a coating of water-insoluble plastics material on the surface or surfaces of the electrode plate. Examples of suitable materials are polyacrylates, polystyrene, polyvinylacetate and polyvinylchloride. Copolymers may also be used.

An apparatus for the processing and scrubbing of contaminated gases i.e., gases entrained with particulate matter, is presented. The apparatus comprises a primary dust removal unit which receives a descending gas pipeline originating from a generator or source of contaminated gases. This primary dust removal unit acts to precipitate the larger solid particles from the contaminated gas via gravity ...

The paper contains a pre-condensate phenolic resin in which free carbon dioxide-containing bubbles are present and is manufactured by impregnating a paper with an aqueous impregnating solution of a phenol/formaldehyde pre-condensate containing a carbonate, followed by drying and partial curing of said pre-condensate under conditions which result in release of carbon dioxide containing bubbles. The...

The paper contains a pre-condensate phenolic resin in which free carbon dioxide-containing bubbles are present and is manufactured by impregnating a paper with an aqueous impregnating solution of a phenol/formaldehyde pre-condensate containing a carbonate, followed by drying and partial curing of said pre-condensate under conditions which result in release of carbon dioxide containing bubbles. The...

The subject invention is a foamable composition based on a blend of a carbon monoxide- or sulfur dioxide-containing ethylene copolymer and a vinyl or vinylidene halide polymer, and the closed-cell foamed article produced therefrom.

A mud pulse telemetry tool utilizes a needle valve (165) to generate pressure pulses in a column of drilling fluid. A sensor sends a digital signal to a solenoid, (47) which moves a plunger (53, 77). Movement of the plunger (53, 77) changes a spool valve (69) to direct high pressure drilling fluid to a selected side of a piston (119). Low pressure drilling fluid on the other side of the piston (11...

PCT No. PCT/EP78/00014 Sec. 371 Date May 7, 1979 Sec. 102(e) Date May 7, 1979 PCT Filed Sep. 5, 1978 PCT Pub. No. W079/00132 PCT Pub. Date Mar. 22, 1979.A process for granulating slag melts, glass melts, ceramic melts, metal melts and melts of metal alloys, particularly blast furnace slag melts, the melt being shaped into at least one thin, liquid melt stream moving freely in a predetermined direc...

A two component system, and method for its preparation, from which a phenol-formaldehyde resin foam may be prepared, which system comprises in a first component a phenol-formaldehyde resin, a blowing agent which is an inert, low boiling liquid, an effective amount of a nitrogenous modifier capable of permitting dispersion of the blowing agent in the resin, and a surfactant; and in a second compone...

In a method of producing uniaxially oriented polymer material, particularly a uniaxially oriented film, from a high density polyethylene, in which the material is put under tension and is drawn from a transverse heated portion with a draw ratio of 5:1 or higher (preferably 7:1 to 20:1), the drawing temperature is selected to be between 80 DEG C. and 110 DEG C., and preferably below 105 DEG C., ...

The paper contains a pre-condensate phenolic resin in which free carbon dioxide-containing bubbles are present and is manufactured by impregnating a paper with an aqueous impregnating solution of a phenol/formaldehyde pre-condensate containing a carbonate, followed by drying and partial curing of said pre-condensate under conditions which result in release of carbon dioxide containing bubbles. The...

A spacing member 40 is of a special design for use with a differential assembly having drive gears 26 and 26, in the form of worm gears, which are operatively connected to each other through sets of transfer gears 34 and 36, having worm wheel portions 37 for meshing with respective drive gears 26 and 28. The spacing member 40 is made up of a number of pieces for ease of installation and removal an...

A differential assembly (10) having worm gears (26, 28) as drive gears together with transfer gears (30, 32) operatively connected to the drive gears is provided with spherical mounting surfaces (40) and a washer element (42) for accommodating angular displacement of axle segments (12) and (14) relative to the differential assembly. In addition, a spacing member (50) is provided with a convex sphe...

Compositions for treating metal, e.g., steel sheets which act as compositions lubricants during stamping of the sheets and protect the sheets against rust during their storage and before and after the stamping thereof. The compositions comprise a mineral oil, a basic calcium salt of arylaromatic sulphonic acid, a further anti-rust agent, a saturated higher fatty acid, a non-ionic wetting agent and...

Compositions for treating metal, e.g., steel sheets which act as compositions lubricants during stamping of the sheets and protect the sheets against rust during their storage and before and after the stamping thereof. The compositions comprise a mineral oil, a basic calcium salt of arylaromatic sulphonic acid, a further anti-rust agent, a saturated higher fatty acid, a non-ionic wetting agent and...