A process for the removal and recovery of mercury and, if desired, other heavy metals from incinerator waste water produced by washing waste gases from incinerators, which comprises adding to the waste water a reducing agent or a combination of oxidizing and reducing agents, subjecting the thus added waste water to stripping treatment in the presence of ferrous ion to obtain a mercury vapor-contai...

In repairing articles of natural rubber or elastomer predominantly of natural rubber with cured polymer or prepolymer (polyurethane/polyurea), adhering advantages are obtained especially at elevated temperatures when the damaged area is treated with halogen-containing oxidant dissolved in 1,2-dichloroethane instead of other solvents.

This invention concerns a spray can. The spray can comprises (a) a water-repellent surface treating agent composed of a polyorganosiloxane represented by the general formula, HO[R2SiO]nH wherein R denotes a monovalent substituted or unsubstituted hydrocarbon group and n a numeral of the value of 5000 to 100,000, and possessed of hydroxyl groups one each at the opposite terminals thereof and a sila...

Flowing (free flowing) granular compositions based on fluoroelastomers, containing dispersed on their surface, as an anti-caking agent, from 5 to 70% by weight of a polyolefin powder.

An optical scanning device is described which comprises a radiation source (6), an objective system (8) and a diffraction grating (9) which is arranged between the objective system and the radiation source to separate the radiation beam (b') reflected by the information surface (2) to be scanned from the beam (b) emitted by the radiation source and for introducing astigmatism in the reflected beam...

Masking films, having the advantageous properties of both those masking films having an intermediate adhesive layer and those masking films having a high-adhesion masking layer without an intermediate adhesive layer, include a masking layer which incorporates a cellulose ester component, a polyurethane and one or more colourants selected from dyes and pigments.

A melt stable, thermoformable polyimide having a melt viscosity measured at a shear rate of 1000 sec<-><1> of less than 2 kNs/m comprising a polyimide of repeat unit of formula where Ar is a tetravalent aromatic radical derived from a dianhydride or corresponding derivative, selected from pyromellitic dianhydride, benzophenone dianhydride, biphenyl dianhydride, diphenyl ether dianhydride, d...

Expanded thermoplastic resinous materials are obtained by mixing styrene-based polymers having mainly a syndiotactic configuration or a thermoplastic resin composition containing said styrene-based polymer and a foaming agent, and then heating the resulting mixture. These expanded materials are excellent in heat resistance and are usefully employed in applications where high heat resistance is nee...

A mechanical vibrator for resonance operation, and particularly well suited for use with a beam chopper, comprises a mechanically stiff vibrator arm representing a fixed mass. A spring with a fixed spring constant is attached to and acts upon the vibrator arm. The vibrator arm and the spring comprise a mass/spring system. A drive means is connected to the vibrator arm and has a positive feedback c...

The cleaning apparatus for medical devices and accessories possesses a washing insert (15) which can be placed in the washing chamber (1) of the device and removed therefrom, for receiving the articles (46) to be cleaned. This insert (15) is designed as an overflow vessel and possesses an overflow retention device (18). A spray device (29) is provided on the upper edge (28) of the vessel, which sp...

A diminutive ultraviolet radiation monitoring device comprising a sensor (10, 35), integrator (22, 43) and control (17, 51). The sensor (10, 35) senses impinging ultraviolet radiation and generates a sensing signal commensurate to the magnitude of the radiation. The integrator (22, 43) integrates the sensing signal in accordance with a first timing function related to an admonished accumulative ef...

PURPOSE:To raise the efficiency of excavation by a method in which pressure water is supplied to the jet nozzle at the tip of the blade of a cutter turning on the tip of a ladder through a rotary coupler attached to a rotary shaft, and excavation and water jetting are made concurrently. CONSTITUTION:A cutter 1 is pivotally supported on the tip of a ladder 2 pivotally supported on a barge 9 in a ve...

In extrusion blowing a hollow member, a preform is extruded and then blown in a mold to produce the final member. The weight of the hollow member is determined after its removal from the mold and compared to a reference value, thereby to adjust the size of the extrusion discharge opening to control the amount of material in the preform. The length of the preform is detected to control the movement...

An article surveillance system employs a label or tag containing a non-linear impedance element, such as a semi-conductor diode, connected to a metal antenna loop configured to pick up two distinct radio frequency transmissions displaced on either side of a selected center frequency. The non-linear impedance element connects opposing sides of a closed loop section at one end of the antenna to form...

The in-situ cleaning of conduits containing oily deposits is facilitated by the concurrent passage of cleaning particles and a non-agglomerating drying agent therethrough in a propelling gas stream. In cycling cleaning operations, the preliminary injection of drying agent into the conduit prior to said concurrent use of cleaning particles and drying agent further enhances the overall in-situ clean...

By comparing the density values of the pixels of a specific color separation image of an original comprising an objective image stored as data in an image memory with a threshold, determining a border line between the area of which density value is higher than the threshold and the area of which density value is lower than the threshold as the conclusive outline of the objective image, and by appl...

An electronic article surveillance system is disclosed, having a transmitter means for producing in an interrogation zone sequences containing a plurality of discrete different radio frequencies thereby causing a circuit present within the zone to resonate at its resonant frequency in response to energy absorbed at at least three different frequencies. A receiver means is provided to cause an alar...

Specific antibodies accumulate in their target tissue after administration (i.v., intraperitoneal, intrapleural, etc.). The antibodies described herein are associated with ferromagnetic particles which thus likewise accumulate in the target tissue. The particles lead to an increased rate of relaxation in magnetic resonance imaging investigations and thus to a targeted increase in contrast of the p...

PURPOSE:To utilize a lumber support as a foot rest for the occupant of a rear seat by providing a space penetrating nearly the center of a seat back and by fitting the lumber support into this space so that it can be moved up and down and rotated. CONSTITUTION:The front seat 1 of a car is provided with a seat back 3 fitted to a seat cushion 2 through a reclining mechanism 4 as being capable of rec...

A process which enables one to employ calcium as an inclusion shape control additive without need for complicated addition procedures.