Abstract: An object is to prevent a bottle from being inclined when a weight is dropped, and to prevent cushion members from moving due to the impact applied when the bottle is inclined, thereby enabling efficient and correct measurement of the water hammer strength. An apparatus for testing the water hammer strength includes holding element that holds bottle filled with content and sealed with a cap at a position above the center of gravity thereof so as to suspend the bottle in the air, and the holding element is placed on cushion members placed on a fixing stage. A weight is then dropped onto the cap to measure the water hammer strength. The cushion members are compressed and deformed in advance using a compression element for forcing the holding element downward to solve the above-described problems.

Abstract: The present invention provides a method for testing the water hammer strength of a glass bottle. The method includes the steps of providing a holding device on a fixing stage with a cushion material therebetween, holding the bottle filled with a content and fitted with a cap with the holding device at a position above the center of gravity thereof and suspending the bottle in the air, and dropping a weight directly or indirectly onto the cap to apply an impact to the bottle. The weight is repeatedly dropped while gradually increasing a drop energy thereof. The water hammer strength of the bottle is tested based on the drop energy of the weight at the time when the bottle is damaged.

Abstract: An object is to prevent a bottle from being inclined when a weight 5 is dropped and to prevent cushion members 3 from moving due to the impact applied when the bottle is inclined, thereby enabling efficient and correct measurement of the water hammer strength. In an apparatus for testing the water hammer strength in which holding means 4 that holds bottle 1 filled with content and sealed with a cap at a position above the center of gravity thereof so as to suspend the bottle in the air is placed on cushion members 3 placed on a fixing stage 2 and in which a weight 5 is dropped onto the cap to measure the water hammer strength, the cushion members 3 are compressed and deformed in advance using push-down means for forcing the holding means 4 downward to solve the above-described problems.

Abstract: The present invention provides a method for testing the water hammer strength of a glass bottle. The method includes the steps of providing a holding device on a fixing stage with a cushion material therebetween, holding the bottle filled with a content and fitted with a cap with the holding device at a position above the center of gravity thereof and suspending the bottle in the air, and dropping a weight directly or indirectly onto the cap to apply an impact to the bottle. The weight is repeatedly dropped while gradually increasing a drop energy thereof. The water hammer strength of the bottle is tested based on the drop energy of the weight at the time when the bottle is damaged.

Abstract: The invention relates to a laminate, which has at least a portion where a fluorine resin and a crosslinking elastic adhesive body such as of an ethylene-vinyl acetate copolymer or the like are directly bonded together and which is used as a window material of buildings or mainly used as an outdoor electric member and also to a method for making the laminate. More particularly, the invention provides a surface-treating method of a fluorine resin suited to impart bonding properties to a fluorine resin for the laminate, to a laminate having a good property of bonding between the fluorine resin and the crosslinking elastic adhesive body, and also to a method for making such a laminate as mentioned above.

Abstract: A wafer support and peripheral parts thereof are used in a heating apparatus for semiconductor wafers and are made of a silicon nitride-silicon carbide ceramic composite containing 5 to 30 weight % silicon carbide. The wafer support and peripheral parts have superior crack healing characteristic in addition to superior thermal resistance, thermal shock resistance, and chemical stability.

Abstract: A magnetic recording disk favorably employable in a magnetic recording and reproducing method in which a magnetic recording disk is rotated at an increased rotation rate is essentially composed of a flexible support, a non-magnetic undercoating layer, and a thin magnetic layer which has a smooth surface and utilizes an iron-containing ferromagnetic metal powder, wherein the ferromagnetic metal powder contains an amount of an aluminum element in an amount of 5 to 30 atomic % based on the amount of iron element, and the magnetic layer is adjusted to have a squareness ratio of in the range of 0.15 to 0.30.

Abstract: A cleaning method for realizing uniform ashing of residues at a high efficiency by uniformly injecting neutral active species directly toward the surfaces of vulcanization residues left on a vulcanization mold is described. The method includes setting a ring-shaped cavity in face-to-face reaction with the inner surfaces of a ring-shaped vulcanization mold in a vacuum treating vessel, transmitting a microwave in the cavity, and emitting the microwave via a number of coupling slots formed in the outer side of the cavity toward the inner surfaces of the vulcanization mold whereupon a reaction gas is injected in the space of the treating vessel between the inner surfaces of the vulcanization mold and the cavity, so that a plasma including a major proportion of neutral active species generated from the reaction gas and the emitted microwave, and the elastomer residue is ashed by means of at least one gas selected from the plasma gas and a neutral active species-containing gas.

Abstract: A composite rubber article is obtained by joining a rubber composition based on a brominated p-methylstyrene/isobutylene copolymer to a different material such as a plastic, inorganic and metallic material through a di-, tri- or tetra-alkoxysilane compound. The copolymer is firmly joined to the different material. The invention is applicable to the manufacture of composite rubber articles such as tires, high-pressure hoses, and pneumatic springs.

Abstract: A rubber composition comprising a rubber component and a di- or trialkoxysilane compound is joined to a surface-modified resin to form a resin/rubber laminate. The laminate typically forms a refrigerant carrying hose wherein the resin defines an inside surface.

Abstract: A developing roller includes a magnet roller and a rotatable sleeve thereon. The sleeve is covered with a surface coating of a metal, alloy, metal nitride, metal oxide, metal carbide or metal sulfide by dry plating. The coating has a resistivity of up to 0.01 .OMEGA.cm. The sleeve is fully wear resistant at its surface. Formation of the coating by dry plating minimizes the variation of coating thickness to improve the dimensional precision of the sleeve surface. The developing roller and a developing apparatus equipped therewith can produce images of quality for a long time.

Abstract: A breather structure for a blow-by gas which is capable of reducing the oil content in a blow-by gas as much as possible. A breather structure for the blow-by gas in an internal combustion engine, in which an auxiliary machinery is provided in a crank chamber of the internal combustion engine for centrifugally separating the oil content from a blow-by gas by rotation of a rotor portion, integrated with a crank shaft, of the auxiliary machinery. A breather passage for introducing the blow-by gas from which the oil content is separated to the outside of a crank chamber is formed in an auxiliary machinery cover for covering side portions of the auxiliary machinery. In this structure, a cylindrical wall having a center axis identical to the rotational center axis of the rotor portion of the auxiliary machinery is formed in such a manner so as to project from the auxiliary machinery cover to the rotor portion.

Abstract: A gas barrier rubber laminate comprising a nylon film layer, an intermediate layer of a cured trialkoxysilane, and a rubber layer is fully flexible and pliable and has improved gas barrier properties to fluorocarbon gases. Such a gas barrier rubber laminate is prepared by modifying a surface of a nylon film with low-temperature plasma treatment or corona discharge treatment, applying an organosilane solution to the modified surface, curing the organosilane, laying a rubber layer on the cured organosilane, and curing the rubber layer thereto.

Abstract: A semiconductor memory device provides redundancy using a decoder which examines a memory address and outputs the contents of memory at that address if the decoder determines that the address signal is selecting a correct bit cell in the memory, or clamps the output at a predetermined level if the decoder determines that the address signal is selecting an error bit cell in the memory.

Abstract: A Schottky barrier diode is manufactured by first forming insulating layer on a semiconductor substrate of a first conductivity type. The insulating layer is then provided with a first opening partly exposing the substrate. Then a continuous semiconductor layer doped with an impurity of a second conductivity type is formed over the insulating layer and on the exposed surface of the substrate. The semiconductor layer is etched in the direction of thickness until those portions which lie on the insulating layer and the exposed surface of the substrate are removed, whereby a portion of the semiconductor layer remains on the side wall of the insulating layer which defines the first opening, and a second opening is formed partly exposing the substrate within the first opening. A guard ring region is then formed in a surface region of the semiconductor substrate by diffusing the impurity from the remaining doped semiconductor layer.

Abstract: A semiconductor memory device comprises an insulation layer and a plurality of polycrystalline silicon layer regions formed on the insulation layer. The polycrystalline silicon layer region includes a semiconductor element region and a meltable semiconductor fuse link region. The two regions are integrated with each other to constitute a unit memory cell. A plurality of unit memory cells connected between bit lines and word lines jointly constitute a memory device. Where required data is written in the memory device, then the semiconductor fuse region of a specified unit memory cell is melted away.

Abstract: A method for producing a semiconductor device comprises the steps of selectively etching a part of a second conductivity type semiconductor layer formed on a first conductivity type semiconductor substrate where an isolating oxide layer is to be formed; introducing a first conductivity type impurity into a substrate contact forming part extending from the bottom of said etched part, by way of the side surface thereof, to the top surface of said second conductivity type semiconductor layer to form a substrate contact; thermally oxidizing said etched part to form an isolating oxide layer and forming a semiconductor element in said second conductivity type semiconductor layer.