Abstract: Traveling water screens including a non-metallic seal plate mounted to a face of a carrier chain link proximate a side portion of a basket frame are disclosed. The seal plate is configured to reduce flow between the chain link and the basket. Related methods of retrofitting a traveling water screen are also disclosed.

Abstract: A traveling water screen comprises a basket having a frame including an upper portion, a lower portion, and side portions, a coarse screen secured to the frame, a fine screen overlay attachable to the coarse screen, and a bucket portion secured to a lower portion of the frame, comprising an inner wall surface, and at least one deflector secured to the inner wall surface.

Abstract: A traveling water screen comprises a basket having a frame including an upper portion, a lower portion, and side portions, a coarse screen secured to the frame, a fine screen overlay attachable to the coarse screen, and a bucket portion secured to a lower portion of the frame, comprising an inner wall surface, and at least one deflector secured to the inner wall surface.

Abstract: A multilayer, woven fabric for use in a papermaking machine includes a self-sustaining top layer including a plurality of top machine direction yarns interwoven with a plurality of top cross-machine-direction yarns and a bottom layer including a plurality of bottom pairs of machine direction yarns interwoven with a plurality of bottom cross-machine-direction yarns. Each of the bottom cross-machine-direction yarns substantially vertically underlies a respective top cross-machine-direction yarn and each of the bottom pairs of machine direction yarns substantially vertically underlies a respective top machine direction yarn, with at least one of the machine direction yarns in at least some of the bottom pairs of machine direction yarns interweaving the bottom cross-machine-direction yarns to each other and to the top cross-machine-direction yarns of the top layer.

Abstract: A multilayer, woven fabric for use in a papermaking machine includes a self-sustaining top layer including a plurality of top machine direction yarns interwoven with a plurality of top cross-machine-direction yarns and a bottom layer including a plurality of bottom pairs of machine direction yarns interwoven with a plurality of bottom cross-machine-direction yarns. Each of the bottom cross-machine-direction yarns substantially vertically underlies a respective top cross-machine-direction yarn and each of the bottom pairs of machine direction yarns substantially vertically underlies a respective top machine direction yarn, with at least one of the machine direction yarns in at least some of the bottom pairs of machine direction yarns interweaving the bottom cross-machine-direction yarns to each other and to the top cross-machine-direction yarns of the top layer.

Abstract: Multilayer woven fabrics include first and second machine direction layers, each machine direction layer including machine direction yarns extending in the machine direction of movement of the fabric through a section of a papermaking machine. One of the machine direction layers includes a plurality of pairs of contiguous machine direction yarns; each pair being spaced apart in the cross-machine-direction of the fabric from an adjacent pair and being in substantially vertically stacked alignment with a single machine direction yarn, or a pair of machine direction yarns in the other machine direction layer.

Abstract: A web forming fabric has a machine direction of intended movement on a web forming machine and a cross-machine direction substantially normal to the machine direction. The fabric includes machine direction yarns disposed generally in the machine direction and transverse yarns disposed generally transversely to the machine direction. The fabric includes first and second substantially linear arrays of systematically distributed areas of high drainage on one side thereof. These linear arrays are oriented at an acute angle to the machine direction and at an acute angle to each other. The boundaries of each of the systematically distributed areas are defined by two pairs of adjacent sides; the adjacent sides of one pair being angled segments of one transversely extending yarn and the adjacent sides of the other pair being angled segments of a second transversely extending yarn contiguous to the one transversely extending yarn.

Abstract: A fabric employed in a web forming apparatus to form a patterned fibrous web includes at least one layer of yarns oriented in first and second directions and being woven to provide a lattice that separates a plurality of systematically distributed woven areas of a predetermined configuration that is defined by the pattern of the continuous lattice and with the systematically distributed woven areas including at least three yarns oriented in each of the first and second directions.

Abstract: The present invention is an apparatus and process for blending high purity chemicals to produce a high purity chemical mixture with circulation, purification and sensing of said chemical mixture between blending of said high purity chemicals and storage of said high purity chemicals for use, ultimately to produce a high purity chemical mixture for on-site use in treating semiconductor materials, such as at a semiconductor fabrication facility that processes silicon wafers.

Abstract: A noble metal hydrocracking catalyst which has high selectivity for naphtha range products is provided. The hydrocracking catalyst comprises: a) from about 70 to about 90 weight percent of a Y zeolite, based on the catalyst having a silica to alumina mole ratio of from about 4.8 to less than 6.0, a unit cell constant within the range of about 24.50 to about 24.57, a Na2O level of less than or equal to about 0.2 weight percent; b) from about 10 to about 30 weight percent, based on the catalyst of an alumina having a mercury intrusion pore volume within the range from about 0.55 to about 0.85 cc/g; and c) from about 0.5 to 1 weight percent, based on the catalyst of a noble metal wherein said hydrocracking catalyst have a dispersivity of the noble metal of equal or greater than about 50% by hydrogen chemisorption measurement, a surface area of greater than or equal to 700 m2/g by BET surface area measurement, a compacted bulk density within the range of from about 0.40 to 0.

Abstract: A noble metal hydrocracking catalyst which has high selectivity for naphtha range products is provided. The hydrocracking catalyst comprises:a) from about 70 to about 90 weight percent of a Y zeolite, based on the catalyst having a silica to alumina mole ratio of from about 4.8 to less than 6.0, a unit cell constant within the range of about 24.50 to about 24.57, a Na.sub.2 O level of less than or equal to about 0.2 weight percent;b) from about 10 to about 30 weight percent, based on the catalyst of an alumina having a mercury intrusion pore volume within the range from about 0.55 to about 0.85 cc/g; andc) from about 0.5 to 1 weight percent, based on the catalyst of a noble metal; wherein said hydrocracking catalyst have a dispersivity of the noble metal of equal or greater than about 50% by hydrogen chemisorption measurement, a surface area of greater than or equal to 700 m.sup.2 /g by BET surface area measurement, a compacted bulk density within the range of from about 0.40 to 0.

Abstract: A transfer configuration for a paper making machine, the transfer configuration being composed of: 1) a first carrier fabric having a first surface on which a fibrous web is transported to the transfer configuration at a first velocity; 2) a second carrier fabric having a second surface on which the fibrous web is transported away from the transfer configuration at a second velocity that is less than the first velocity; 3) a lengthened transfer zone that begins at a transfer shoe and terminates at a portion of a transfer head and has a machine direction oriented length ranging from about 0.

Abstract: This invention relates to a process in which a linear olefin is converted under isomerizing conditions to its corresponding methyl branched isoolefin by contact at a temperature of from 200.degree. C. to 650.degree. C. with an isomerizing catalyst comprising (i) at least one zeolite having only in one dimension a pore structure having a pore size small enough to retard by-product dimerization and coke formation and large enough to permit entry of the linear olefin and allow formation of the methyl branched isoolefin, (ii) an alumina binder and (iii) up to about 15% by weight of coke oxidation-promoting metal. After a period of operation, when sufficient coke has deposited on the catalyst in an amount to significantly reduce the activity of the catalyst, the catalyst is stripped of hydrocarbon and then contacted at elevated temperature with an oxygen-containing gas for a sufficient time to burn off the coke, i.e., to regenerate the catalyst at a temperature of less than about 565.degree. C.

Abstract: An apparatus and method for evaluating the permeability of membrane articles, particularly condoms and gloves, is designed to quantify physiologic conditions which exist during use of the articles. Permeability is determined by monitoring fluorescent microspheres of approximately the size of HIV which pass through the membrane articles.

Abstract: Apparatus is provided to serve as a phantom for evaluation of prosthetic valves and cardiac ultrasound procedures, wherein a controlled pulsatile flow of a blood-mimicking fluid is passed through a multi-chambered region into which are mounted mitral and aortic valves and adjustably positionable ultrasound transducers. A low friction, drive which involves very low levels of extraneous vibrational inputs, is provided with adjustment of both the volume flow rate of blood-mimicking fluid moved in each operational pulse with further control provided by relatively easily adjusted screws to selectively regulate the systolic and diastolic times of the pulsatile flow generated by a bellows arrangement. Windows made of silicone elastomer material presenting both tissue-equivalent impedance for ultrasound transmission and tissue-equivalent attenuation of the ultrasound are provided in controlled thickness to permit detailed observation of valvular flow parameters of interest, e.g.

Abstract: A system and technique for determining the total radiated ultrasonic power output from a diagnostic ultrasound device having an output transducer includes a water chamber having a parabolic reflector. The transducer is mounted on the chamber at a location so that acoustic power from the transducer is focussed by the parabolic reflector to a first thermistor chip mounted in the chamber on a sound-absorbing rubber plate. The rise in temperature of the thermistor chip due to sound absorption changes its resistance. The thermistor chip is connected in one leg of a Wheatstone bridge. A reference thermistor chip is mounted on the rubber plate away from the ultrasonic beam and is connected in an opposite leg of the bridge. Starting from a null setting of the bridge, the output of the bridge after a suitable "response time" is in accordance with the acoustic energy delivered by the transducer.