Abstract: To cause a safety mechanism for an emergency to be activated at lower pressure in comparison with a rupture plate, an accumulator comprises an accumulator housing, a stay having a liquid passage provided in the end surface portion on an end of a stepped tubular portion of the stay, a bellows with a bellows cap, a safety mechanism for pressure drop, and a safety mechanism for an emergency which is structured such that, in an emergency such as a fire, the bellows cap or a member held by the bellows cap presses the stay by high pressure due to the fire in the housing, to buckle the stay at a step of the stepped tubular portion, and open a liquid chamber, wherein a thin portion is provided circumferentially partially at the step of the stay to readily incline the end surface portion of the stay when the stay is buckled.

Abstract: To cause a safety mechanism for an emergency to be activated at lower pressure in comparison with a rupture plate, an accumulator comprises an accumulator housing, a stay having a liquid passage provided in the end surface portion on an end of a stepped tubular portion of the stay, a bellows with a bellows cap, a safety mechanism for pressure drop, and a safety mechanism for an emergency which is structured such that, in an emergency such as a fire, the bellows cap or a member held by the bellows cap presses the stay by high pressure due to the fire in the housing, to buckle the stay at a step of the stepped tubular portion, and open a liquid chamber, wherein a thin portion is provided circumferentially partially at the step of the stay to readily incline the end surface portion of the stay when the stay is buckled.

Abstract: To prevent plastic deformation of a bellows due to a pressure difference between inner and outer sides of the bellows in an outside gas type or inside gas type accumulator, a disc-like gasket is held in a floatable state to a surface close to a stay in a bellows cap by a gasket holder, so that, the disc-like gasket moves together with the bellows cap at a steady operation time, the disc-like gasket moves together with the bellows cap to contact with an end surface portion of the stay, thereby closing the liquid chamber at a zero-down time, and the bellow cap moves toward a position where liquid pressure and gas pressure balance while the disc-like gasket keeps contacting with the stay due to a difference of pressure receiving areas in both the surfaces when the liquid in the liquid chamber is thermally expanded at a zero-down time.

Abstract: To prevent plastic deformation of a bellows due to a pressure difference between inner and outer sides of the bellows in an outside gas type or inside gas type accumulator, a disc-like gasket is held in a float able state to a surface close to a stay in a bellows cap by a gasket holder, so that, the disc-like gasket moves together with the bellows cap at a steady operation time, the disc-like gasket moves together with the bellows cap to contact with an end surface portion of the stay, thereby closing the liquid chamber at a zero-down time, and the bellow cap moves toward a position where liquid pressure and gas pressure balance while the disc-like gasket keeps contacting with the stay due to a difference of pressure receiving areas in both the surfaces when the liquid in the liquid chamber is thermally expanded at a zero-down time.

Abstract: According to the present invention, a cylindrical member of a solenoid valve is provided with a protruding portion that protrudes in an axial direction of the cylindrical member. By fitting the protruding portion into a vertical groove of a plunger, it is possible to restrict the cylindrical member from moving in a peripheral direction of the plunger. Therefore, it is possible to prevent change of the flow path that passes the plunger and the vertical groove, as well as to prevent variation in a sliding speed of the plunger or the like. As a result, a fluid pulsation reduction effect is obtained.

Abstract: Disclosed is a method of packing sheet recording materials comprising the step of cutting the sheet recording materials to a prescribed size and the step of packing the cut sheet recording materials into a packing material, wherein the cutting step and/or packing step is conducted in an environment with a degree of cleanliness of less than or equal to class 10,000 of U.S. Federal Standard 209d. No image defects are generated during use of the films contained in the package.

Abstract: According to the present invention, a cylindrical member of a solenoid valve is provided with a protruding portion that protrudes in an axial direction of the cylindrical member. By fitting the protruding portion into a vertical groove of a plunger, it is possible to restrict the cylindrical member from moving in a peripheral direction of the plunger. Therefore, it is possible to prevent change of the flow path that passes the plunger and the vertical groove, as well as to prevent variation in a sliding speed of the plunger or the like. As a result, a fluid pulsation reduction effect is obtained.

Abstract: In a brake control apparatus according to the present invention, a range of change in a hydraulic pressure with respect to an amount of current applied by a drive signal from a control circuit of an N/O valve provided in a hydraulic path that extends from a hydraulic pressure generation source to a wheel cylinder is set to be smaller than a range of change in a hydraulic pressure with respect to an amount of current applied to an N/C valve provided in a hydraulic path that extends from the wheel cylinder to a reservoir. Accordingly, it is possible to decrease the hydraulic pressure which is generated when the amount of current is minutely varied in the N/O valve, thereby enhancing controllability of the hydraulic pressure. This enables highly accurate hydraulic control.

Abstract: A heat-sensitive recording material comprising a substantially transparent support and a heat-sensitive recording layer formed on one side thereof, wherein the thermal recording energy required for increasing the transmission density of recorded areas as measured with a Macbeth transmission densitometer TD904 (visual filter) to a value higher by 0.1 than the transmission density of non-recorded areas is from 10 mJ/mm.sup.2 to 40 mJ/mm.sup.2, and the energy required for obtaining a transmission density of 2.5 in recorded areas as measured with a Macbeth transmission densitometer TD904 (visual filter) is from 80 mJ/mm.sup.2 to 130 mJ/mm.sup.2. The recording material provides a highly precise gradated image using a conventional thermal head.

Abstract: A heat-sensitive recording material comprising on a support a heat-sensitive layer comprising color-forming component A, color-forming component B which forms a color by reacting with the color-forming component A, and a tricarbocyanine dye having at least two acidic groups, wherein the tricarbocyanine dye has an absorption maximum wavelength of 650 to 1300 nm in the heat-sensitive layer and has an absorption maximum wavelength 50 nm or more longer than that of an aqueous solution of the tricarbocyanine dye.

Abstract: A heat-sensitive recording material for laser recording is provided including a support having thereon a heat-sensitive layer including at least a first substantially colorless coloring component, a second substantially colorless coloring component which reacts with the first substantially colorless coloring component to develop a color, and an infrared-absorbing dye.

Abstract: A method for forming an image is described which includes bringing a transparent heat-sensitive recording material including a transparent support made of a synthetic polymer having thereon a transparent heat-sensitive recording layer into contact with a light-absorbing material, at least at the time of effecting recording, and irradiating the light-absorbing material with a laser beam to heat the transparent heat-sensitive recording layer and to cause color formation therein. High speed, high density, and high quality recording can be performed with an increased light absorption efficiency.

Abstract: A multicolor recording material having on one side of a support at least two layers capable of producing colors different from each other in hue through respective color-producing reactions, which further has an interlayer constituted by a water-soluble polyanionic polymer having gelled through the interaction with a polycation between every adjacent two of said color-producing layers to prevent migration of ingredients from one color-producing layer to another.

Abstract: A toner employable for electrostatography which is in the form of micro-capsule comprises a core material enclosed with a resin shell. The core material contains a colorant and an oily medium wherein the oily medium contains chlorinated paraffin. A process for forming a visible image employing the toner is also disclosed.

Abstract: An improved electrostatographic toner comprises toner particles which comprise a colorant and a binder, wherein to a surface of said toner particle are attached polymer chains formed by a graft polymerization reaction of a monomer having two or more polymerizable double bonds and a monomer having a charge-control group and a polymerizable double bond.

Abstract: An electrostatographic toner material suitably employable for the pressure fixing process, which comprises encapsulated toner particles having an average particle size in the range from about 0.5 to 1,000 microns, in which the toner particle comprises a pressure fixable adhesive core material containing colorant and magnetizable substance and a pressure rupturable shell enclosing the core material, the outer surface of the shell being provided with white electroconductive powder.

Abstract: An electrostatographic encapsulated toner for pressure fixing process comprising a core material which comprises a colorant and a binder composition, and a shell. The binder composition comprises a polymer and an oily liquid in which said polymer is dissolved or swelled in said oily liquid. The core material contains a silicone which is insoluble in the binder composition and the shell has metal oxide particles therein or on its outer surface.

Abstract: An electrostatographic encapsulated toner comprising a core material which comprises a colorant and a binder and a resin shell enclosing said core material in the form of micro-capsule, which is characterized in that:said binder is an oily binder comprising a solid polymer and an organic solvent capable of dissolving or swelling said polymer and having a boiling point of not lower than 150.degree. C., said oily binder having a viscosity within the range of 1,000-100,000 cp at 25.degree. C.; said resin shell is formed around the core material by a polymerization process selected from the group consisting of an interfacial polymerization process, an inner polymerization process and an outer polymerization process; and the surface of said resin shell is deposited with a polymer of at least one vinyl monomer having a nitrogen-atom.

Abstract: A novel heat-sensitive recording material is provided comprising a support, a heat-sensitive coloring layer containing an electron donating dye precursor which is normally colorless or light-colored and an electron accepting compound which exhibits a color upon reaction with said dye precursor, a first protective layer containing a polyvinyl alcohol resin and a second protective layer containing a silicon-containing denaturated polyvinyl alcohol, a colloidal silica and/or amorphous silica, wherein either of the first or second protective layer may be coated directly on said coloring layer.

Abstract: A heat-sensitive recording material is disclosed, comprising a heat-sensitive layer containing a normally colorless or slightly colored dye precursor and a compound capable of reacting with the dye precursor to form color, with at least one of the heat-sensitive layer, an interlayer, and a protective layer containing polyvinyl alcohol as an adhesive and a hardener represented by formula (I) ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 each represents a hydrogen atom, a halogen atom, a saturated or unsaturated hydrocarbon group containing from 1 to 6 carbon atoms, or a saturated or unsaturated hydrocarbon group containing from 1 to 20 carbon atoms and at least one ether bond.