Abstract: A light source unit includes a plurality of light sources emitting light for irradiating an object, and a holding portion holding the plurality of light sources having an insertion hole for an optical fiber inserted therethrough to propagate the light from the object formed therein. The holding portion holds each of the plurality of light sources such that an irradiation region of the light of each of the plurality of light sources is formed on one side of the holding portion. The insertion hole has a first opening that is an opening facing the irradiation region and a second opening that is an opening different from the first opening, and is formed in the holding portion such that one end surface of the optical fiber is exposed from the first opening and faces the irradiation region when the optical fiber is inserted therethrough.

Abstract: A mirror unit 2 includes a mirror device 20 including a base 21 and a movable mirror 22, an optical function member 13, and a fixed mirror 16 that is disposed on a side opposite to the mirror device 20 with respect to the optical function member 13. The mirror device 20 is provided with a light passage portion 24 that constitutes a first portion of an optical path between the beam splitter unit 3 and the fixed mirror 16. The optical function member 13 is provided with a light transmitting portion 14 that constitutes a second portion of the optical path between the beam splitter unit 3 and the fixed mirror 16. A second surface 21b of the base 21 and a third surface 13a of the optical function member 13 are joined to each other.

Abstract: A wing door opening/closing apparatus including a link mechanism and a spring for swinging up a wing door 1. This wing door opening/closing apparatus is made up by plural wing door opening/closing devices A and B. The disparity of the moments generated by one wing door opening/closing device A in the plural wing door opening/closing devices A and B is compensated by a moment generated by the other wing door opening/closing device B.

Abstract: An apparatus for opening and closing a wing door 1 of a truck, which is hinged to a vehicle body of a truck is accommodated in a space defined by a frame 2 when the wing door 1 is closed. The apparatus comprises a first arm 4 pivotally mounted on the vehicle body so as to pivotally move in association with the opening and closing of the wing door; a second arm 6 swingably linked between one end of the first arm 4 and the wing door 1; a spring 16 having one end supported relative to the vehicle body for generating a biasing force to lift up the wing door 1; a spring rod 11 connected to the other end of the spring 16 so as to move in association with the extension and retraction of the spring 16; a third arm 9 swingably linked between the other end of the first arm 4 and the spring rod 11; and a guide 13 for guiding the spring rod 11 or a link point 10 between the third arm 9 and the spring rod 11 for moving the spring rod in a direction substantially parallel with the axis of the spring 16.

Abstract: An apparatus for opening and closing a wing door 1 of a truck, which is hinged to a vehicle body of a truck is accommodated in a space defined by a frame 2 when the wing door 1 is closed. The apparatus comprises a first arm 4 pivotally mounted on the vehicle body so as to pivotally move in association with the opening and closing of the wing door; a second arm 6 swingably linked between one end of the first arm 4 and the wing door 1; a spring 16 having one end supported relative to the vehicle body for generating a biasing force to lift up the wing door 1; a spring rod 11 connected to the other end of the spring 16 so as to move in association with the extension and retraction of the spring 16; a third arm 9 swingably linked between the other end of the first arm 4 and the spring rod 11; and a guide 13 for guiding the spring rod 11 or a link point 10 between the third arm 9 and the spring rod 11 for moving the spring rod in a direction substantially parallel with the axis of the spring 16.

Abstract: In an image forming apparatus, a developing device includes a stirring and conveying screw of electrically conductive material to stir and convey toner along a toner delivery path, a toner gathering port located in the toner delivery path to temporarily stay the toner there during the conveying, an auxiliary stirring member of electrically conductive material movably held in the toner gathering port, and a stop located at the toner gathering port to prevent the auxiliary stirring member from being removal off the toner gather port and to allow the toner to pass the toner gathering port. The stirring and conveying member and the auxiliary stirring member are charged electricity by an bias voltage applied to the developing device so that the toner can be fully stirred and, at the same time, can be electrically charged uniformly with an increased amount of charges.

Abstract: In a photoelectrographic image forming machine of the power saving type, a temperature rise tendency calculating unit calculates a tendency of temperature rise in terms of an amount of temperature rise per unit time during the normal operation mode, and a temperature calculating unit calculates a lowest temperature of the heating unit during the power saving mode in terms of a temperature such that a duration till the temperature of the heating unit reaches the target fixing temperature is a desired period during which the image forming machine restores the normal operation mode from the power saving mode. A fixing temperature control unit keeps the temperature of a heating unit not less than the lowest temperature during the power saving mode. The result is that the restoration period can be kept not more than the maximum period the user can be patient to wait.

Abstract: A developing apparatus develops a latent image formed on a latent image carrying body with a developer. The developing apparatus includes a developing unit having a means for supplying the developer to the latent image carrying body to develop the latent image on the latent image carrying body and a developer housing for accommodating the developer. A developer storage box stores the developer which is to be supplied to the developing unit. The developer storage box is detachably mounted on the developing unit and has a volume substantially the same as a volume of the developer which can be accommodated in the developer case of the developing unit. The developer in developer storage box is supplied to the developing unit.

Abstract: A springing up apparatus for the door (especially the rear door of a cargo box) of a van-type truck is constructed by pivotally attaching the second end of an arm A having a first end pivotally attached to a cargo box body and a second end of an arm B having a first end pivotally attached to the door of the cargo box, and loading a tension spring between a prescribed point on the arm B and a prescribed point on the cargo box body or on the door of the cargo box. This makes it easy to open and close the door of the cargo box by human power. Further, use is made of a compression spring, which is provided on the roof of the cargo box, and there are additionally provided a spring cover mounting structure, which is capable of rotating about a horizontal shaft fixed to the roof, as well as a door-opening adjustment mechanism, which comprises a bracket and an adjustment disk, for adjusting initial amount of compression of the compression spring. This makes it easy to bring the door to rest at a desired position.

Abstract: A fixing unit is provided with a fixing heat roller, a first reel supplying a cleaning member which cleans a surface of the fixing heat roller, a second reel taking up the cleaning member from the first reel, and a unidirectional clutch mechanism intermittently driving the second reel in a direction to take up the cleaning member using rotation of the fixing heat roller.

Abstract: A developing device for developing an electrostatic latent image with a two-component developer comprises a developer container (46) including a developer-accumulating chamber (50), and a developer-agitating chamber (56) provided above the developer-accumulating chamber. A communication passage (64) is provided between the developer-agitating chamber and the developer-accumulating chamber, and is opened to the developer-agitating chamber to define an overflow opening for the developer. The device also comprises a developer-carrying body (48) provided in the developer-accumulating chamber of the developer container, and the developer-carrying body is exposed to face an electrostatic latent image carrying body, and brings the developer from the developer-accumulating chamber to a facing zone therebetween for development of an electrostatic latent image formed on the electrostatic latent image carrying body.

Abstract: An image forming apparatus including a plurality of developing units each having a developer storage portion for accommodating a developer; a plurality of feeding devices for discharging used developers from the respective developing units; and a single collecting device for collecting the used developers discharged by the respective feeding device.

Abstract: An electrostatic recording system using a dielectric belt for conducting electrification of a sheet of paper and a transfer belt so that the sheet of paper is not wound and caught by a photoconductor drum, and a transfer voltage can be lowered so as to smoothly separate the sheet of paper from a transfer belt. The electrostatic recording system applies a voltage to only the dielectric belt at a stage before the sheet of paper 3 is attracted to the dielectric belt 10 and applies voltage to the sheet of paper 3 conveyed to the dielectric belt, and to the dielectric belt 10 while the sheet of paper and the belt are mutually superposed.

Abstract: A multicolor electrostatic recording apparatus in which two or more different color toner image are superimposed by respective electrostatic recording units. Each of the electrostatic recording units includes an electrostatic latent image carrier, a developer for developing an electrostatic latent image formed on the carrier with a color toner, and a detector for detecting the density of the developed image on the basis of a detecting mark which is formed on the carrier as a part of the latent image and developed by the developer. A discriminating means compares the density data with an optional desired density value to discriminate whether the density data falls in an allowable range. A controller feed-back controls at least one of parameters for determining the density of the developed image so that the density becomes to be in the allowable range, when the density falls out of the allowable range.

Abstract: A thermal fixing device for rising a temperature of a heat roller up to a designated temperature in a short time and a color image forming apparatus using this device. This thermal fixing device comprises a heat roller having a heat source and positioned on the side of a toner image on a recording medium to fix the toner image; a pressurizing member, positioned opposite to the side of the toner image on the recording medium, for pushing the recording medium against the heat roller; a temperature sensor for detecting a temperature of the heat roller; and a control circuit for controlling the heat source of the heat roller by comparing a detected temperature of the temperature sensor with a set temperature, sequentially stepwise increasing the set temperature up to the designated temperature when starting the operation of the device and, at the same time, controlling a generated energy of a plurality of heat sources to sequentially decrease the generated energy thereof.

Abstract: To provide a hot roller type thermal fixation device, incorporated in an electrostatic recording apparatus, particularly suitable for the thermal fixation of a multicolor toner image, said apparatus comprising a plurality of electrostatic recording units arranged in series with each other, wherein the surface smoothness of a fixed toner image is maintained at a favorable level for a long period by providing an anti-abrasive treatment onto an elastomeric covering of the heating roller. An elastomeric covering (32b) is applied on the surface of a heating roller (32) of a hot roller type thermal fixation device (22), and an anti-abrasive covering (32c) is further applied on the elastomeric covering.

Abstract: A plurality of electrostatic recording units (Y, C, M and B) are arranged in series along a recording medium moving path. Each electrostatic recording unit includes an electrostatic latent image carrier (48), a developing unit (54, 54') arranged on the upstream side of the electrostatic latent image carrier, and a cleaning unit (60) arranged on the downstream side. The developing unit includes a developer holding container (66) having a developer storage portion (70) and a developer agitating portion (76) located above the developer storage portion. The developer agitating portion is communicated with the developer storage portion via a communicating path (82). The cleaning unit (60) of one of the adjacent electrostatic recording units is disposed adjacent to the developer storage portion (70) of the developer holding container (66) composing a portion of the developing unit (54, 54') of the other electrostatic recording unit.

Abstract: Disclosed is a heat roller fixing apparatus for performing a thermal fixation onto a sheet by rotating a heat roller. This heat roller fixing apparatus comprises a heat roller including a roller body and a plurality of heating members provided in the roller body and a pressurizing member provided in a face-to-face relationship with the heat roller. This heat roller fixing apparatus has a rotation mechanism for rotating the plurality of heating members along an inner periphery of the roller body and a control unit for drive-controlling the rotation mechanism during a standby status for driving the heating members without rotating the roller body. An unevenness in preheating on the surface of the roller body of the heat roller is thereby prevented.

Abstract: Disclosed is a novel acoustic insulator constituted by a shaped article obtained by adding a binder to shreds of a plastic coated with a magnetic material, such as a magnetic tape or magnetic sheet and shaping the same into a sheet or a block having a bulk specific gravity of 0.05 to 0.4 and a gas permeation resistance of 3 to 90 dyn.S/cm.sup.4. Alternatively, shreds of a plastic coated with a magnetic material, such as a magnetic tape or magnetic sheet, are filled into casing members so that the bulk specific gravity of the composite product is 0.05 to 0.4 and its gas permeation resistance becomes 3 to 90 dyn.S/cm.sup.4.

Abstract: In a toner supply control system for a printing device, a toner supply unit supplies a developing unit of the printing device with a two-component developer containing toner particles and carrier particles in accordance with a first control signal. A storage unit stores information concerning a plurality of toner marks formed on an electrostatic latent image carrying member of the printing device and developed by the developing unit. The toner marks respectively have patterns related to condition of the two-component developer. A selecting unit selects one of the toner marks in accordance with a second control signal. A sensor optically reads the toner mark formed on the electrostatic latent image carrying member and generates a detection signal. A first control unit generates the second control signal on the basis of the condition of the two-component developer. A second control unit generates the first control signal on the basis of the detection signal.