In the process for polymerizing an olefin in the gas phase according to the present invention, an olefin is continuously fed to undergo a gas phase polymerization in a fluid bed reactor in which a metallocene catalyst is present. At least one compound selected from the group consisting of water, alcohols and ketones is added in a specified amount simultaneously with the feeding of the olefin. Thus...

A device for testing visual contrast sensitivity is disclosed whereby the contrast between a vectographically polarized test symbol and a reference background may be continuously varied by changing the direction of polarization of a polarization analyzer situated along the test axis. The invention is practiced by providing a chart projector or a conventional refractor with a rotatable analyzer.

A device and method for processing a biological fluid comprises directing the biological fluid tangentially or parallel to the face of a separation medium such that a plasma-rich fluid passes through the separation medium and a plasma-depleted fluid passes tangentially to the surface of the separation medium. A portion of the plasma-rich fluid is subjected to a pulsating reverse pressure different...

The equipment comprises a tank 2 that defines a larger chamber 21 able to hold a relatively large quantity of water, and pump means 41 connected to nozzle means 6 for the external dispensing of the substance present in the tank 2; in the upper part of the chamber 21 is a container 3 defining a smaller chamber 31, the capacity of which is much less than that of the larger chamber 21, and from which...

Ceramic materials in the form of massive components or ceramic coatings capable of being applied as a coating to metal surfaces are particularly suitable for providing an anticorrosion barrier in the motor vehicle field, in particular in the wheel/brake disc/bearing assembly, extending the average life of these components.

An apparatus for forming and applying a sealing flap to seal the mouth of a filled sack, starting from a continuous strip (9) of heat-sealable material includes a first loop conveyor to unwind the strip from the feeder roll and transfer it, using clamp means (10, 11, 12, 13) and guide means (14), to a second loop conveyor (15), likewise provided with clamp means (21, 22, 23, 24) to hold the strip ...

A remote control system (1) wherein a transmitter (3), following closure of a push-button switch (16), provides for cyclically generating a digital code, which cyclic generation of the code is cut off automatically at the end of a predetermined time (T) following closure of the switch (16); the system (1) also including a receiver (5) for detecting the generated code and enabling or disabling an a...

System to roll at least two sections (13) in blocks of fast rolling mill stands, each fast rolling mill stand (11-12) including one pair of rolling rolls (17) supported as cantilevers and having alternately a horizontal axis (17o)/vertical axis (17v) or viceversa, the rolling rolls (17) having a diameter between 160 and 250 mm. and a distance between 600 and 1200 mm. between the centre of one pair...

Modular pack 1 for smoking articles 3, especially cigarettes 2, made from a single material and defined by a plurality of smaller containers 8, adjacent to each other and joined together, and which can be detached from each other: it being possible to selectively open the smaller containers 8 to allow access to the articles 3 contained therein. Figure 3.

The filling of a cigarette (3) under observation is controlled by intersecting the open-end surface (14) of the cigarette (3) with at least one coherent light blade (9) emitted by at least one laser source (4), to form a respective real light trace (15), and by analyzing any deviation or discontinuity of the real trace (15) in relation to a theoretical, straight, continuous trace (13) formed by jo...

A method of feeding tobacco items, particularly cigarettes, to a continuous packing machine, whereby a continuously-moving conveyor, presenting pockets for respective groups composed of a number of superimposed layers of items, is supplied successively with the layers, each of which is withdrawn from a feedbox in a substantially transverse direction in relation to the items in the layer, and by ro...

The invention concerns a mounting for spectacles with interchangeable lenses in which the lenses 3 are attached to front mounting parts 1 fitted with rigid supports 4 attached to a part 10 of the edge 2 surrounding the said lenses 3. The mounting 11 comprises elastically pliable rings 5, at least in a circumferential direction 6, that can be attached to the rigid supports 4 and the lenses 3, locki...

The apparatus for compacting solid urban refuse comprises a compartment for compacting the refuse of an essentially rectangular, prismatic shape arranged so as to present the diagonal of its cross section practically horizontal. The compartment consists of a lower portion forming a kind of tank and an upper portion that is able to function as a cover for the said tank and is hinged at one end to t...

In at least one nozzle, the calibrated hole (1532) is formed in a component made of hard material (1530) which is inserted in the wall (11) of the distributor, at the position of a passage (1534) formed in the wall; complementary spherical surfaces, which permit variation of orientation, may be provided for mutual contact.

The detergent comprises: potassium cocoate (at least 7%), sodium alkylbenzene sulphonate (at least 5%), sodium alkyl ether sulphate (at least 5%), ethoxylated, propoxylated cocoa fatty acid (at least 2.5%), sodium chloride (at least 1.5%), traces, each less than 1%, of cocoa diethanolamide, an opacifying emulsion, a mould- preventing preservative and an essence, the remainder being water.

The invention relates to a process for the welding of sheets and films of polyolefin material at radio frequencies, in accordance with which a natural or synthetic zeolite or a molecular sieve is added to the material which is to be welded. The invention also relates to the composition of material for carrying out the process.