Methods are disclosed for preparing a highly active solid metallocene-containing catalyst system and its use in the polymerization of olefins. The catalyst system is prepared by creating a catalyst system solution by combining an aluminoxane with a metallocene having a substituent which has olefinic unsaturation in a suitable liquid to form a liquid catalyst system, conducting prepolymerization of...

Methods are disclosed for preparing a highly active solid metallocene-containing catalyst system and its use in the polymerization of olefins. The catalyst system is prepared by creating a catalyst system solution by combining an aluminoxane with a metallocene having a substituent which has olefinic unsaturation in a suitable liquid to form a liquid catalyst system, conducting prepolymerization of...

Gypsum is treated with organosiloxane(H-siloxane), which contains Si and H atoms and alkali silicate, to improve the water repellency.

Heavy hydrocarbon oils are converted into light hydrocarbon oils by two-stage process wherein, in the first stage, a heavy hydrocarbon oil is subjected to thermal cracking conditions and, in the second stage, the product of the thermal cracking is subjected to a hydrotreatment in the presence of a specific catalyst having a large pore volume in pores with diameters of 200-400 ANGSTROM . The hydro...

A video camera or a camcorder includes a conversion portion 200a for converting an object image captured by first lenses 11a into an electrical signal, and conversion portion 200b for converting an object image captured by second lenses 11b into an electrical signal provided independently from each other, and a video signal producing portion 300 provided commonly for conversion portions 200a and 2...

In a video reproducing apparatus, operating devices and recording devices are connected with a simple structure to record game information while operating the game, and a plurality of small capacity of external secondary memory means can be used as a large capacity of external secondary memory means. The main body of the video game machine is connected to a plurality of the operating devices with ...

L'invention concerne une capsule inviolable à verseur pour le bouchage d'un col de récipient comportant une collerette extérieure d'accrochage. La capsule selon l'invention comprend un anneau de fixation avec bourrelet intérieur d'accrochage à la collerette extérieure du col du récipient, un bouchon à jupe d'étanchéité articulé par une charnière sur l'anneau et une bande d'inviolabilité arrachable...

The actuator uses an electric motor to drive a recirculating ball screw thread connection, to hold a brake-actuation spring at bay. After the spring has been compressed to the brakes-off position, the electric motor is de-energized. Then, the screw-thread connection is prevented from rotating and backing off, by virtue of the fact that the electric motor is connected to the screw thread via a high...

A catalyst containing a vanadium passivating agent in the form of anatase crystalline TiO2.

A process for the treatment of non-woven sheets made of synthetic textiles containing two constituents arranged side-by-side, one based on polyamide (polyhexamethyleneadipamide) and the other based on polyester (polyethylene glycol terephthalate), in which the following steps are carried out: (a) conversion to a sheet of the crimped textile having an overall linear density of less than 2 dtex, (b)...

A method for producing stackable covers comprising the operation of supplying an annular element provided with a vertex wall for closing the upper opening, said annular element having its upper perimeter edge projecting above said vertex wall and curved back toward the inside; said method being characterised by the operation of making, on the inner and outer surfaces of said upper edge, correspond...

The subject of the invention is a new instrument designed for use at the work site for updating and modifying the present-day urban telephone lines. Given the implementation of optical fibre technology in the telephone networks, it becomes necessary to employ at the work site new techniques for laying tubes containing the optical fibre cables inside certain underground conduits of predetermined di...

Method for the in vitro amplification and expression of a coding sequence in mammal cells, characterized in that it comprises the following steps: a. cloning the said coding sequence at a site by a first restriction enzyme of a first prokaryotic vector under the control of a promoter which is capable of functioning in mammal cells, and upstream from a polyadenylation site in which the first vector...

The layout consists of a container which also acts as a frame, where a combined system of a submersible pump 3 with a collector 4 having pneumatic valves, a flow regulator 6 for rapid drainage with filter, a level regulator and a pneumatic pump 9, make it possible to paint the internal parts of the toilet bowl while maintaining the piece in position.

The device comprises a spacer 2, inserted in the nozzle 1, which limits the quantity of liquid in the nozzle itself, to avoid dripping in the closed phase, a cylindrical rubber ring 3 and a shaft constructed with its head 5 having a flat seat 6 and a centring pin 7, so that the closure, upon passage of the ceramic paint into the spray gun, is determined by said shaft, at the end of which is made t...

The equipment for liquid film painting without compressed air for sanitary articles and ceramic products in general comprises a booth 1 with liquid recovery, a robot which bears a plurality of guns 6 for the different geometries of the parts which are to be painted, a paint container 3, a pneumatic pump 4 which feeds the guns at low pressure, of the order of 6 bar, and a carousel 2 which acts as a...

This invention concerns a system for making pieces of furniture to size, consisting of envisaging the manufacture of two distinct support frames cut to size, one resting on the ground, the other on a wall at a certain height from the first, both to be subsequently fitted with partitions which permit the formation of compartments which may be opened or closed by means of sliding doors, drawers or s...

The supporting case or skin (2) houses at least one unit of equipment (2) with outputs (21) receiving LF signals or low voltages for controlling loudspeakers (25). There is at least one door (6) held by hinges (10) to the wall (5), opening to allow access to the equipment, and there are connections (24,28) from the equipment to the loudspeakers.