Abstract: A process for the manufacture of olefin polymers in a continuous gas phase polymerization reaction wherein monomer, after passage through the fluidized bed, is cooled to a temperature below its dew point to produce a mixture of cold gas and liquid. All or nearly all of the cold gas is introduced into the bottom of the reactor to serve as the fluidizing gas stream for the fluidized bed. Cold liquid, separated from the mixture, is either injected directly into the peripheral region around the fluidized bed or onto the walls of the expanded section of the reactor to form a liquid film flowing down the wall of the reactor or alternatively, the cold liquid is warmed to form a heated fluid by passing in indirect heat exchange relation with the fluidized bed and is then injected directly into the peripheral region of the fluidized bed or onto the wall of the expanded section of the reactor to form a downward flowing stream of cold liquid.

Abstract: A continuous process for the manufacture of olefin polymers in a continuous gas phase polymerization reaction wherein monomer, after passage through the fluidized bed, is cooled to a temperature below its dew point to produce a mixture of cold gas and liquid. All or part of the cold gas is introduced into the bottom of the reactor to serve as the fluidizing gas stream for the fluidized bed. Cold liquid separated from the mixture is warmed to form a heated fluid by passing in indirect heat exchange relation with the fluidized bed and the heated fluid is then injected directly into the bed; combined with the fluidizing gas stream; sprayed on top of the bed or combined with gaseous monomer removed from the fluidized bed for cooling.

Abstract: There is provided a post-reactor process for a polymer, especially an elastomeric polymer, prepared by a gas phase polymerization in the presence of an inert particulate material comprising: introducing the polymer containing inert particulate material into a polishing vessel in the presence of a fluidizing gas under polishing conditions.

Abstract: A method of reducing the purge gas consumption, dry-down time, or both required for start-up and operation of a gas phase fluidized bed reactor system. The method involves contacting a stream of cycle gas having water and/or a polar hydrocarbon with an adsorbing material while the cycle gas is in a closed circulation loop.

Abstract: There is provided a polymerization, especially a gas phase polymerization, of a sticky polymer in the presence of a catalyst under polymerization conditions using carbon black as an inert particulate material, the improvement comprises conducting said polymerization in the presence of a carbon black having a sugar-containing or sugar-derived binder, which carbon black is prepared by heating the carbon black to a temperature of at least about 280° C. for a time sufficient to decompose said sugar-containing or sugar-derived binder prior to polymerization.

Abstract: There is provided a catalyst comprising: (A) a titanium metal compound represented by the formula: (C.sub.5 R.sup.1.sub.5)TiX.sub.2 Y; (B) a compound having the formula: R.sup.2 H, wherein R.sup.2 is an alkoxy, thiolato, carboxyl, or amino group; (C) an aluminoxane, and optionally a support or spray drying material (D). There is also provided a polymerization process employing the catalyst, a polymer produced using the catalyst, and a cable produced therefrom.

Abstract: There is provided a catalyst containing a transition metal precursor having the formula (C.sub.5 R.sup.1.sub.5)MQ.sub.3, a bulky non-phenolic compound, an aluminoxane, and optionally a Br.phi.nsted acid and/or a support or spray drying material. There is also provided a polymerization process employing the catalyst composition, a polymer produced using the catalyst, and a cable produced therefrom.

Abstract: There is provided a process for bulk handling an elastomeric material in granular form comprising loading said elastomeric material into a transport vessel while maintaining the loading temperature of the majority of the elastomeric material below 60 degrees C., preferably below 45 degrees C.

Abstract: A contact cleaning roller (CCR) system includes a shell having an electrostatically active outer surface and being supported by a close-fitting rotatable shaft. The shaft within the shell is provided with a cam groove extending from a first axial location to a second axial location disposed 180.degree. from the first axial location, and then back to the first axial location. A cam follower attached to the inner surface of the shell rides in the cam groove, causing the shell to oscillate axially of the shaft at a frequency of oscillation which is the numerical difference between the rotational frequencies of the shell and shaft. In a preferred embodiment, the CCR shell is nipped against a backing roller, which may be an idle roller or a driven roller, the web passing therebetween in contact with the working surfaces of both rollers.

Abstract: An optical profilometer having a movable head for measurement of the profile of a surface of a wafer under test in response to an optical beam projected by the head and incident onto the surface. The wafer may be a substrate for a data storage disc, and the surface may be one of a plurality of surfaces of the wafer, including the side face, the edge, and a radius or bevel therebetween. A fixture for holding the wafer includes a frame for orienting the wafer and also pivotally rotating the wafer about an axis. A vacuum chuck holds the wafer on the frame. An actuator orients the fixture frame in an plurality of positions spaced angularly about the axis to present selected ones of the wafer surfaces to the beam for profile measurement. Wafers of various diameters may be accommodated on the fixture.

Abstract: An improved system for passenger safety in a front-end vehicle collision, whereby the kinetic energy of a passenger may be reduced before the passenger is exposed to the crash deceleration. An electrical sensor mounted at the extreme front end of the vehicle senses the onset of a front-end collision and sends a crash signal to the passenger compartment. Preferably, the sensor is a normally-closed momentum-activatable switch. A passenger seat is mounted on translating means permitting rearward motion and has a harness to secure a passenger to the seat. The seat is held in place by a shearable pin. Beneath the seat, attached between the floor of the vehicle and the frame of the seat, is a linear actuator powered by an explosive charge which is ignitable electrically in response to the crash signal.

Abstract: The flow of air through a fume hood is optimized by producing a bi-stable vortex within the vortex chamber of the fume hood regardless of sash movement. A bi-stable fume hood optimizes capture face velocity to minimize backflow of fume laden air through the hood sash opening. This bi-stable vortex fume hood reduces the energy consumption up to sixty percent versus the present day mono-stable vortex fume hoods. The bi-stable vortex fume hood utilizes a vortex pressure control system to reposition top, center, and bottom slot openings of a baffle in the hood. This baffle moves the bi-stable vortex away from the fact when the sash is fully opened and creates a clearing action near the work surface as the sash is closed. The fume hood's airfoil is placed inside the fume hood chamber and the airfoil has multiple entry pattern, one of which turns the vortex up and away from the open sash window. The other creates flow which washes the work surface of the hood.

Abstract: A system for conveying sheets of thin substrate having low sheet stiffness while controlling and limiting the angle of wrap of the substrate on the roller, and a sheet cleaning apparatus employing the wrap-limiting system. A substrate conveyance roller is provided with a plurality of circumferential grooves spaced along the roller. Into each groove is disposed a substrate guide in near-tangential relationship with the surface of the roller at the point on the roller where stripping of the substrate from the roller surface is desired. In a preferred embodiment of a wrap-limiting system in accordance with the invention, one or more substrate guides are provided which extend through the grooves both upstream and downstream of the roller along the substrate conveyance path. The points at which the guide enters and leaves the groove define and limit the wrap angle assumable by the substrate on the roller.

Abstract: An extendable-bristle brush having a hollow, tubular handle containing a folded bundle of fibers, the free ends of the fibers extending from an open end of the handle as bristles. The bundle is formed by folding a half-bundle of fibers about a hooked drawpiece and drawing the fold of the bundle into the handle so that both ends of each fiber protrude from the same end of the tubular handle to form the bristles of the brush. Folding of the bundle creates a bulge in the bundle which is slightly larger than the inner diameter of the tubular handle. Drawing the bundle into the handle compresses the bulge, resulting in a holding force which frictionally locks the bundle within the handle. The bundle may be advanced by pulling out the exposed bristles. As the bundle is repeatedly pulled out and cut off for additional uses, the holding force does not change significantly with shortening of the bundle or the handle.

Abstract: A contact cleaning roller (CCR) system includes a shell having an electrostatically active outer surface and being supported by a close-fitting rotatable shaft. The shaft within the shell is provided with a cam groove extending from a first axial location to a second axial location disposed 180.degree. from the first axial location, and then back to the first axial location. A cam follower attached to the inner surface of the shell rides in the cam groove, causing the shell to oscillate axially of the shaft at a frequency of oscillation which is the numerical difference between the rotational frequencies of the shell and shaft. In a preferred embodiment, the CCR shell is nipped against a backing roller, which may be an idle roller or a driven roller, the web passing therebetween in contact with the working surfaces of both rollers.

Abstract: A finish topper for bulb crops having a plurality of longitudinal, parallel, generally horizontal, spaced-apart moving belts for conveying bulbs through the apparatus. Adjacent belts are driven at different linear speeds. In a preferred embodiment, alternate belts are replaced by stationary rails to maximize the speed differential. Below and adjustably close to the belts is a driven rotating blade for cutting the bulb stems and also exerting a downwards draft of air through the belts. Onions introduced onto the belts are conveyed through the apparatus by the belts, and the differential in speed between the moving belts and stationary rails causes the bulbs to rotate and gyrate randomly as they are being conveyed. Because the belts are spaced apart, the bulbs assume momentarily an attitude to permit the uncut stems of bulbs to extend downwardly between the belts. The bulbs are retained on their shoulders on the belts in inverted posture.

Abstract: A system for axially reciprocating a tacky roller (contact cleaning roller, or CCR) across a substrate being cleaned by the roller, to spread particles which are non-uniformly distributed on the substrate surface over a broader area of the tacky roller collecting surface, thereby decreasing the rate of decay of collecting efficiency, improving the average cleanliness of the treated substrate, and extending the operating lifetime of the tacky roller between renewals. The roller may or may not be in contact with the substrate surface during reciprocation of the roller. The system includes a second CCR to alternate with the first CCR, such that at least one roller is cleaning the substrate while another roller is being renewed. The system can be configured to provide full-width CCRs which overlap both edges of a surface at all times during reciprocation.

Abstract: Reaction of ferric chloride with 2-chloro-p-xylene yields dichloro-p-xylene having a high ratio of 2,5-dichloro-p-xylene isomer to 2,3-dichloro-p-xylene isomer.

Abstract: The disclosure is directed to water curable polymers of an azide sulfonyl silane and a substantially linear, low pressure ethylene polymer which are resistant to water and electrical treeing and can be used as coverings, such as insulation, about wires and cables.

Abstract: The disclosure of this application is directed to water-curable, azide sulfonyl silane modified, alkylene-alkyl acrylate copolymers which are particularly useful as coverings about wires and cables providing insulation or jacketing thereon having improved elongation properties.