Abstract: There is provided pre-expanded particles of a propylene resin having a high expansion ratio and excellent molding adhesion without using a volatile blowing agent or increasing an expansion pressure. The pre-expanded particles of a propylene resin are prepared by the process comprising dispersing resin particles comprising a propylene resin composition, which contains 100 parts by weight of (A) a random copolymer of ethylene and propylene having an ethylene content of 1.5 to 4.5% by weight and 0.

Abstract: A tuck-in apparatus for a shuttleless loom, for blowing an end portion of a weft into a shed, includes a plurality of nozzles located on a side of the row of warps for jetting air. The plurality of nozzles include: a tuck-in nozzle located in the vicinity of a cloth fell and oriented in substantially parallel with the cloth fell; and at least one auxiliary tuck-in nozzle oriented by an acute angle toward a warp supply side with respect to the cloth fell.

Abstract: There is provided pre-expanded particles of a propylene resin having a high expansion ratio and excellent molding adhesion without using a volatile blowing agent or increasing an expansion pressure. The pre-expanded particles of a propylene resin are prepared by the process comprising dispersing resin particles comprising a propylene resin composition, which contains 100 parts by weight of (A) a random copolymer of ethylene and propylene having an ethylene content of 1.5 to 4.5% by weight and 0.

Abstract: A process for the production of a silicon nitride sintered body which comprises heat-treating a stock of silicon nitride sintered body within a temperature range of from the temperature at which the internal friction of the stock exhibits a peculiar peak maximum minus 150.degree. C. to that plus 150.degree. C. A representative used in the process is one which is produced by mixing powdered silicon nitride with powdery sintering aids so as to give a powder mixture comprising 5 to 15% by weight (in terms of oxide) of at least one element selected from the group consisting of rare earth elements and aluminum, 0.5 to 5% by weight (in terms of oxide) of at least one element selected from the group consisting of Mg, Ti and Ca and the balance of Si.sub.3 N.sub.4, molding the powder mixture, and sintering the resulting compact in a nitrogen-containing atmosphere at 1500.degree. to 1700.degree. C.

Abstract: A magnetic recording medium comprises a substrate and a magnetic layer provided on the substrate, and has a surface profile satisfying the following conditions (1) to (6):(1) the number of peaks which project above a slice line at a depth of 25 .ANG. from the maximum peak height (PC25) is 5 to 100/mm;(2) the ratio of the number of peaks which project above a slice line at a depth of 50 .ANG. from the maximum peak height (PC50) to PC25 (PC50/PC25) is 1 to 3;(3) the ratio of a high spot count (HSC) at the center line to PC25 (HSC/PC25) is 1 to 4;(4) the skewness is 1 to 5;(5) the maximum peak height is 60 to 200 .ANG.; and(6) the bearing ratio at a depth of 50 .ANG. from the maximum peak height is not more than 3%.

Abstract: To provide sliding components each comprising a base metal and, joined thereto, a sliding face member having a sliding face of crowning profile, in particular, sliding components such as valve train parts, a cam follower and a rocker arm of an automobile engine. A sliding component having a structure comprising (1) a ceramic forming a sliding face and (2) a base metal joined together, in which the extent of crowning of the sliding face is at least 0.1 to 0.4% of the maximum length of the junction face of the ceramic. The ceramic has a four-point flexural strength of at least 50 Kg/mm as measured in accordance with the Japanese Industrial Standard R1601. The base metal is mainly steel at least the surface of which has preferably a martensite texture and has a hardness of higher than 45 in terms of H.sub.RC. The structure may have an intermediate layer of a metal or cermet.

Abstract: A visible-ray polymerizable composition comprising:(1) a monomer comprising a (meth)acrylate monomer; and(2) a visible-ray polymerization initiator comprising:(A) a coumarin dye;(B) at least one photo acid generator selected from the group consisting of a halo-alkyl substituted s-triazine derivative and a diphenyliodonium salt compound; and(C) an aryl borate compound.

Abstract: The present invention is directed to a device for producing carbonated water. The device includes a hermetic container, a first pipe member continually conducting a carbonic acid gas into an inner hollow space of the hermetic container, a second pipe member intermittently conducting pressurized water into the inner hollow space of the hermetic container in response to demand, and a third pipe member intermittently conducting carbonated water temporarily staying in the container to a location outside of the container in response to demand. A nozzle is connected to one end of the second pipe member and is disposed within the container at a top end thereof. The nozzle has a plurality of holes which allow the pressurized water to be downwardly injected into the inner hollow space of the container. A plate member may be disposed within the inner hollow space of the container.

Abstract: A magnetic recording medium is disclosed, which contains a substrate, an uneven layer and a metallic magnetic layer provided on the substrate in that order, wherein the uneven layer is made of an Al--M (wherein M is a metal capable of forming a carbide) and has an uneven surface. This magnetic recording medium enables a magnetic head to float at a low height, and prevents the magnetic head from sticking to the magnetic recording medium. Further, the uneven layer has an excellent adhesivity to the substrate preventing it from peeling off the substrate, and thus a magnetic recording medium having an appropriate surface roughness and excellent durability is provided. This magnetic recording medium can cope with high density recordings.

Abstract: A method for treating a magnet roll including the steps of providing a permanent magnet member having an outer circumferential surface and a plurality of axially extending magnetic poles formed in the outer circumferential surface, slidably surrounding the member with a non-magnetic metal sleeve of hollow cylindrical shape, the sleeve and the member being rotatable relative to each other, blasting a surface of the sleeve with spherical particles of a non-magnetic material having a density in a range of from 3 to 4 g/cm.sup.3 and Mohs' hardness in a range of from 11 to 14 to produce a surface roughness (R.sub.z) in a range of from 0.5 to 8 .mu.m.

Abstract: A module cover mounting structure for an air bag device for a passenger, is formed of an opening formed in the instrument panel of an automobile for mounting the air bag device, a module cover for covering the opening such that its peripheral edge covers the edge of the opening inside of the cabin of the automobile, and a plurality of tear lines formed in the module cover and adapted to be torn by the push of said air bag, when the air bag is inflated. The central portion of the module cover is torn into a door shape to be opened into the cabin. The tear lines are composed of a lefthand tear line running along the side of said module cover at the lefthand side of the automobile and a righthand tear line running along the side at the righthand side of the automobile. The lefthand and righthand tear lines run up to the edge of the module cover at the back side of the automobile.

Abstract: An air bag mounting structure for an air bag device for a passenger's seat, wherein an end portion of an air bag is mounted to a side of a retainer of an air bag device for a passenger's seat characterized in that the retainer is divided into a front-half portion and a rear-half portion; a pocket portion into which the rear rim of the front-half portion is inserted is provided at the front rim of the rear-half portion; the rear rim of the front-half portion is inserted along with the end portion of the air bag into the pocket portion; the end portion of the air bag extends over the rear rim of the front-half portion; and the front-half and the rear-half portions of the retainer and the end portion of the air bag are secured by insertion members which are inserted through the pocket portion.

Abstract: An air bag device for a passenger, including a container, an air bag contained in the container, a lid covering the container, an inflator, a pair of extensions extending forward from the sides of a front face of the container, and a U-shaped frame extending along the outside of the container and having a pair of arms hinged to the extensions of the container. The frame also includes a bridge portion bridging the arm portions and a support member protruding from the bridge portion and having an end supported by the container. A pair of notches are formed midway of the arm portions and opposing the container for enhancing buckling of the arm portions when a load heavier than a predetermined level is applied to the frame from the lid. The support member may be supported to the container by means of a pin or bolt such that it is released, when the load heavier than a predetermined level is applied, from the pin or bolt to move in the direction of the load.

Abstract: An air bag comprises a first annular cloth disposed on a side of the steering wheel and having an opening formed in a central portion for at least one of an inflator and an inflation gas, a second circular cloth disposed on a side of the driver and joined at a circumferential edge thereof with a circumferential edge of the first cloth, in which a diameter upon expansion is greater than a diameter of the steering wheel. A radial midway of the first cloth is connected with a radial midway of the second cloth by means of a connection piece. The connection piece has a length so that a side of the second cloth protrudes more than a central portion of the second cloth when the air bag is expanded.

Abstract: In an air bag unit, which comprises a retainer (6), an inflator (7, 15, 20, or 22) blowing gas from L blowing holes (7a) at the collision of the vehicle, and an air bag (8) inflated and developed by the gas thus blown out, said inflator (7, 15, 20, or 22) is provided with a mounting member (7d), which comprises an opposed wall (7b) placed face-to-face to the blowing holes (7a) and a mount (7c) with said retainer (6), and the mounting member (7d) and the retainer (6) are connected by connection members (9, 16, 18, 21, or 24) with the mounting end (8a) of said air bag (8) squeezed between said mounting member (7d) and said retainer (6). Because the inflator (7, 15, 20, or 22) itself is provided with an opposed wall (7b) placed face-to-face to the blowing holes (7a) and the mount (7c) with the retainer (6), there is no need to furnish special mounting member such as ring member used in the conventional type air bag unit.

Abstract: Herein disclosed is an assistant driver's air bag system (10) of the type, in which a folded air bag (18) is accommodated in a sub-container (20) and in which the sub-container (20) is inserted into a main container (12) to facilitate the assembling operation of the air bag system (10). The folded air bag (18) and air bag inflating inflaters (16) are held by holding members (12 and 20), and a module cover (14) covering the air bag (18) is attached to the holding member (12). The holding members are composed of the main container (12) fixed on a vehicle and the subcontainer (20) inserted into the main container (12) and formed with holes (21) for allowing gases from the inflaters (16) to pass therethrough. The air bag (18) is accommodated in the sub-container (20).

Abstract: An air bag which is inflated simultaneously or almost simultaneously as a whole to be above to receive a human body quite securely, which is made up on non-expandable cloth as a whole, and which has a shape at inflation wherein both side portions of a central surface facing a human body are projected forward more than the surface facing a human body is projected.

Abstract: There is disclosed a method of folding away an air bag installed in front of the front passenger seat of an automobile. The bag has outwardly swelling longer side portions. The method is initiated by folding the longer side portions inwardly of the air bag to straighten both sides of the bag. The width of the shorter side portions perpendicular to the longer side portions is made slightly less than the width of an air bag case. Then, the bag is folded in alternate directions into zig-zag shape to create folds at right angles to the straightened sides. The folded bag is inserted into the case.

Abstract: In the air bag according to the present invention, pouches 1g are furnished at least along a part of an opening 1d to introduce reaction gas from an inflator, and band-like ring member 1e' mounted on car body and having the plane in the direction approximately perpendicular to the cross-section of the opening 1d is inserted into the pouches 1g.Therefore, the plane of the band-like ring member 1e' runs approximately in parallel to the direction of the introduced reaction gas, and the band-like ring member 1e' is not enlarged in the direction perpendicular to the direction of the introduced reaction gas. As the result, the module can be designed in smaller size. Also, by furnishing the pouches 1g on the periphery of the opening and by inserting the band-like ring member 1e' into the pouches 1g, the number of the base cloths of the air bag can be reduced by one cloth.

Abstract: A module cover of an air bag system comprises a pair of cut-in-half bodies, end of each of which is fixed to the body side of the air bag system and the other ends which are free end engaged with each other openably, and a resin film disposed along the rear face of both cut-in-half bodies so as to stretch over both cut-in-half bodies. By the resin film attached to both cut-in-half bodies, the engagement state of the free ends of both cut-in-half bodies is maintained.