Abstract: Regarding the method of analyzing and measuring a sample and a sample holder in a fluorescence measuring apparatus or phosphorescence measuring apparatus, the present invention is intended to eliminate or reduce the possibility of fluorescence and phosphorescence derived from the sample holder, and uses a holder material with little or no luminescence, fluorescence or phosphorescence for this object. The surface tension of sample liquid is effectively utilized to design the shape of the holder and to manufacture the holder.

Abstract: The invention provides a method for purification of an .alpha.-olefin selected from ethylene and propylene for polymerization use which comprises contacting the .alpha.-olefin with an alkali metal carried on a support material. The invention further provides a method for production of a poly-.alpha.-olefin which comprises polymerizing the thus purified .alpha.-olefin in the presence of a polymerization catalyst comprising a transition metal catalyst component and an organometallic catalyst component.

Abstract: A fixing device includes a pair of fixing rollers to heat toner images and to fix the toner images on a recording medium in which at least one roller coming into contact with toner is provided thereon with fluorine containing resins and a device for coating fluorine containing silicone oil on the surface of the fluorine containing resins at a coating amount of not more than 1.4.times.10.sup.-6 cc/cm.sup.2.

Abstract: A fixing method comprises the step of passing a recording material with a toner image between a heat member and a pressure applying member contacting the heat member to fix the toner onto the recording material, a silicone oil being coated on the surface of the heat member, wherein the toner contains a polyester comprising a unit derived from an aromatic polycarboxylic acid or its anhydride or a unit derived from an aromatic polyhydric alcohol, and the silicone oil is a fluorine-containing silicone oil having a structure unit represented by the following Formula (I):Formula (I) ##STR1##

Abstract: A fixing device includes a fixing member, the surface of which composed of a fluororesin layer, a pressure member which is brought into contact with the surface of the fixing member; a heating member for fusing a toner image on a recording medium, which passes between the fixing member and pressure member, through the fixing member. The device further includes a hollow oil roller for coating toner repellent oil, which is accommodated inside a hollow of the roller, onto the surface of the fixing member. The outer layer of the oil roller is made of a porous layer into which a fluorine-containing surface active agent is impregnated.

Abstract: Disclosed is a toner image forming method, comprising steps of:(1) forming a latent image on an image carrying member,(2) developing said latent image with toner particles including a resin and a colorant so as to form a toner image, said toner particles having a volume average particle size of 5 to 10 .mu.m, and containing toner particles having particle sizes of not more than 5.04 .mu.m in 5 number.multidot.% to 60 number.multidot.

Abstract: A developing unit in use with an image forming apparatus such as a printer and a copier. The developing unit includes: a photoreceptor for holding a toner image; two-component developer consisting of toner and magnetic carrier; a developing sleeve, located in a vicinity of the photoreceptor and slightly separated from the photoreceptor, for supplying the toner of the two-component developer to the surface of the photoreceptor; a developer layer thickness regulator for regulating a layer thickness of the two-component developer provided on a rotatable surface member of the developing sleeve; and a developing bias generator for applying a developing bias voltage, including an AC component, onto the developing sleeve. The developing sleeve further including: the rotatable surface member for conveying the two-component developer; plural magnetic poles each of which is fixed at a respective predetermined location in the rotatable surface member. In the developing unit, layer thickness H.sub.

Abstract: A cleaning device for use in an image forming apparatus which includes an image carrier, an image forming device to form a toner image on the image carrier, and a transferor to transfer the toner image from the image carrier onto a recording sheet, in which the cleaning device cleans a residual toner on the image carrier after transferring. The cleaning device includes a cleaning blade to scrape off the residual toner on a circumferential surface of the image carrier, a contacting member to bring a tip end of the cleaning blade into contact with the circumferential surface of the image carrier in a direction upstream of a moving direction of the image carrier when a cleaning operation of the blade is conducted, and a releasing member to release the tip end of the cleaning blade from the circumferential surface. The blade is made of an elastic member having a coefficient of dynamic friction between the blade and the image carrier of 0.15 to 0.4.

Abstract: In a color image forming apparatus, an image retainer, a charger, a plurality of developing devices and a cleaner are made in one unit. The unit is dismountably supported in a housing so that the unit can be moved out from a first position at which the unit is set in the housing to a second position at which jam disposition is conducted. When the unit means is placed at the second position, a part of the apparatus is used to cover the image retaining surface at the transfer section.

Abstract: In a color toner image forming apparatus equipped with a scanning device to scan a photoreceptor with a light beam which is modulated on the basis of image density represented by image signals so that a latent image is formed on the photoreceptor; there is provided a control device to control the color toner image forming apparatus so that plural color toner images are superimposed on the photorecetor. The control device includes a start position control circuit to control a scanning start position of the scanning device so that the scanning start position is shifted for each of the plural color component images.

Abstract: An developer for developing a latent image with a developing agent such as toner. The developer includes a developing sleeve for holding the developing agent on its surface, in which magnetic poles are provided in the developing sleeve; a equalizer bar for equalizing the amount of the developing agent on the surface of the developing sleeve; a pressing member to press the equalizer bar onto the developing sleeve. In the developer, a radius of curvature of the equalizer bar is between 0.5 mm and 15 mm, and the developing sleeve is processed to have a jagged surface which is defined by a glossiness between 2% Gs and 1400% Gs (20.degree.).

Abstract: The invention provides an apparatus for transferring a toner image from a photoreceptor to a recording sheet. The apparatus includes a plurality of rollers and a belt stretched around the plurality of rollers. The belt is adapted to come in contact with the photoreceptor at a transfer area so that a recording sheet is conveyed on the belt and brought in contact with the image surface at the transfer area and that the toner image is transferred onto the recording sheet. The apparatus further includes a conductive member, disposed so as to come in contact with the belt on one of the plurality of rollers which is positioned upstream in conveying direction than the transfer area, for charging the recording sheet conveyed on the belt.

Abstract: In the manufacture of a fiber reinforced plastic armored cable, long reinforcing fibers are impregnated with an uncured thermosetting resin and formed into a predetermined shape to obtain a plurality of rod-like members with the thermosetting resin held uncured. Then the uncured rod-like members are passed through a die of a melt extruder, by which the rod-like members are each coated with a thermoplastic resin layer. The coated layers of the rod-like members are immediately cooled to simultaneously form a plurality of fiber reinforced plastic armoring strands with the thermosetting resin held uncured. The armoring strands thus obtained are wound around a cable which is fed while being rotated. The cable having wound thereon the strands is passed through a die portion of a melt extruder, by which the cable is sheathed with a thermoplastic resin layer which is immediately cooled and solidified.

Abstract: A twisted FRP structure having sufficient strength and flexibility is produced by providing a rod member disposed centrally and twist a plurality of side strands twisted around the rod member in the same direction at a predetermined pitch. At least the side strand includes a composite strand having an FRP element from by impregnating fibers with an uncured thermosetting resin and a thermoplastic coating on such FRP element, the thermosetting resin being cured after the side strands are twisted around the rod member. The twisting pitch is not less than 25 times the outside diameter of the FRP element in the side strand.

Abstract: A developing apparatus for supplying a developer to a photoreceptor so that an electrostatic latent image on the photoreceptor is developed with the developer. The developing apparatus comprises a developer conveyer, having a rigid surface, for conveying the developer to a developing zone; a developer layer-thickness regulator, shaped like a bar and having a rigid surface portion of the curvature radius between 0.5 mm and 15 mm, for regulating the thickness of the developer to be conveyed to the developing zone; and a supporter for supporting the developer layer-thickness regulator.

Abstract: An image forming apparatus wherein in multi-color mode a multi-color image is formed by repeating a series of uniform charging, image exposing and developing steps to form a plurality of color toner image on a surface of an image retainer, and transferring the color toner image to a transfer material, and wherein in mono-color mode a mono-color image is formed by uniform charging, image exposing and developing in a single step to form a mono-color toner image on the surface of the image retainer, and transferring the mono-color toner image to a transfer material one of the modes being selected. The image retainer is exposed uniformly before the uniform charging step.

Abstract: In an optical fiber carrying spacer which has helical grooves for carrying optical fibers with each groove changing the direction of its helix for each turn about the spacer, each helical groove includes extra-length portions and compensating portions both formed at a smaller angle to a longitudinal axis of the spacer than main groove portions. The extra-length portions are each provided at a position where the direction of the helix changes. The compensating portions are each provided between adjacent extra-length portions at an angular distance ranging from 1/4 to 3/4 of the circumference of the spacer. The spacer effectively prevents stresses from being applied to the optical fibers along the longitudinal direction when the spacer is bent or curved.

Abstract: A container from which its contents can be readily taken out by a simple one-hand finger operation, is provided. The container comprises a lid and a container main body and is sealed at least at its peripheral flange. The container main body can be bent outwardly, and it comprises two contents-holding portions which are divided by the portion for bending and which are designed such that when the container main body is bent these two portions may be pressed by each other. The lid comprises at least a monoaxially oriented film. The lengthwise direction of the portion for bending coincides with the direction of orientation of the monoaxially oriented film. A non-sealed portion is provided at an edge portion of the peripheral flange coincident with at least one end of the portion for bending, and at least two slit lines for initiating tear are provided in a part of the lid which constitutes the non-sealed portion.

Abstract: By use of an excitation beam having a wavelength which is equal to, or close to, the sizes of particular particulate substances as the object of analysis, the particulate substances such as an immunoreaction product between an antigen and an antibody or between the antigen and a material supporting the antibody thereon are detected selectively. Very small particles having specific sizes such as rheumatuid factors, cancer specific antigens can be detected with high sensitivity.

Abstract: A method of continuous molding a rod-like product includes forming an uncured rod-like molding by passing reinforcing fibers impregnated with uncured thermosetting resin through a squeezing die having a predetermined shape. Molten thermoplastic fluororesin is extruded in a ring shape to enclose the rod-like molding. A sheathing layer of the thermoplastic resin is formed by causing the thermoplastic resin to come into contact with the outer periphery of the uncured rod-like molding and by cooling and solidifying the thermoplastic resin. The uncured rod-like molding and the sheathing layer are introduced into a heated tank thereby hardening the thermosetting resin. The sheathing layer is stripped from the molding to form a rod-like product having a surface of fiber reinforced thermosetting resin.