Abstract: The device is a gas-liquid mixing device having a venturi structure in which a throat portion and an enlarged diameter portion are provided in a main passage through which a liquid passes, the gas-liquid mixing device including a collision chamber provided on an outer periphery of the enlarged diameter portion, and a stirring chamber provided downstream of the enlarged diameter portion. A collision flow path communicating with the collision chamber and causing a gas-liquid to collide with an outer peripheral wall, a straight flow path through which the gas-liquid passing through a central portion of the enlarged diameter portion travels straight, and an outer ring flow path through which the gas-liquid flows from the collision chamber to the stirring chamber are formed downstream of the enlarged diameter portion. The gas-liquids from the outer ring flow path and the straight flow path are stirred in the stirring chamber.

Abstract: The device is a gas-liquid mixing device having a venturi structure in which a throat portion and an enlarged diameter portion are provided in a main passage through which a liquid passes, the gas-liquid mixing device including a collision chamber provided on an outer periphery of the enlarged diameter portion, and a stirring chamber provided downstream of the enlarged diameter portion. A collision flow path communicating with the collision chamber and causing a gas-liquid to collide with an outer peripheral wall, a straight flow path through which the gas-liquid passing through a central portion of the enlarged diameter portion travels straight, and an outer ring flow path through which the gas-liquid flows from the collision chamber to the stirring chamber are formed downstream of the enlarged diameter portion. The gas-liquids from the outer ring flow path and the straight flow path are stirred in the stirring chamber.

Abstract: The present device is a gas-liquid mixing device having a venturi structure A in which a throttle portion and a conical portion are provided in a main passage through which a liquid passes, including: a gas mixing passage for taking in gas from a tangential direction with respect to the main passage having a circular cross section; and a protruding portion provided on a downstream side of the gas mixing passage of an inner wall forming the main passage and extending in a central axis direction of the main passage. It is preferable that the protruding portion is provided on an inner wall forming the conical portion, and is formed such that a protruding height from the inner wall increases toward the downstream side.

Abstract: An image forming apparatus includes a printer unit configured to form a toner image on a recording material, the printer unit including a fixing portion configured to heat-fix the toner image on the recording material; a reader unit provided above the printer unit and configured to read an image of an original, the reader unit including an image sensor configured to optically read the original; wherein in a side of the reader unit opposed to the printer unit, there are provided a suction opening configured to suck air from an outside of the reader unit and a discharging opening configured to discharge the air to an outside of the reader unit, and wherein an air flow path connecting the suction opening and the discharging opening overlaps with an entirety of the image sensor in a main scan direction which is an axial direction of the image sensor.

Abstract: An image forming apparatus includes a printer unit configured to form a toner image on a recording material, the printer unit including a fixing portion configured to heat-fix the toner image on the recording material; a reader unit provided above the printer unit and configured to read an image of an original, the reader unit including an image sensor configured to optically read the original; wherein in a side of the reader unit opposed to the printer unit, there are provided a suction opening configured to suck air from a outside of the reader unit and a discharging opening configured to discharge the air to a outside of the reader unit, and wherein an air flow path connecting the suction opening and the discharging opening overlaps with a entirety of the image sensor in a main scan direction which is an axial direction of the image sensor.

Abstract: An image forming apparatus provided with an image forming portion for forming an image on a sheet, a sheet containing portion provided below the image forming portion and containing sheets to be supplied to the image forming portion, and a re-conveying path for again conveying the sheet having an image formed thereon to the image forming portion, wherein a portion of the lower side of the re-conveying path is disposed in the sheet containing portion.

Abstract: An image forming apparatus provided with an image forming portion for forming an image on a sheet, a sheet containing portion provided below the image forming portion and containing sheets to be supplied to the image forming portion, and a re-conveying path for again conveying the sheet having an image formed thereon to the image forming portion, wherein a portion of the lower side of the re-conveying path is disposed in the sheet containing portion.

Abstract: A sheet feeding apparatus with a sheet containing tray adapted to support a plurality of sheets and being shiftable between a sheet supplying position and a waiting position, a sheet supply roller for feeding out the sheet supported by the sheet containing tray at the sheet supplying position, a driving force transmitting device connected to the sheet supply roller and adapted to transmit a driving force from a drive source, and a holding device connected to the driving force transmitting device so that the sheet containing tray is shifted to the sheet supplying position by the driving force transmitted to the sheet supply roller and capable of holding the sheet containing tray at the sheet supplying position while the plurality of sheets are being supplied by the sheet supply roller.

Abstract: An electrophotographic copying apparatus is provided with a first body and a second body, the first body having a photosensitive member, a light source for exposing an original, an original supporting table movable relative to the light source with the original supported thereon, and a first optical system for projecting a first image information light reflected from the original onto the photosensitive member. The second body has a second optical system for projecting a second image information light onto the photosensitive member in the first body. Two copying modes are provided: a first mode for copying by the first image information light, and a second mode for copying by the second image information light. In the second mode, a controller positions a shutter member for blank exposure in the optical path in its retracted position prior to the copying in the second mode.

Abstract: The image-forming apparatus comprises a first frame, a recording electrode with an image formation voltage applied thereto, a belt-like recording medium disposed facing the charging electrode and toner transporting means for supplying toner to a space between said recording electrode and recording medium. For the positioning of the belt-like recording medium with respect to the charging electrode, a second frame for movably supporting the recording medium is provided together with the recording electrode in the first frame. An recording medium feed member is urged against the second frame at a predetermined position thereof. Thus, the recording electrode and recording medium can be positioned relative to each other without need of any particular adjustment whenever the recording medium is replaced.

Abstract: An image forming apparatus which employs a recording method that uses electrically conductive developer, and a developing device for use in the image forming apparatus. A magnetic field is generated in an area having a width larger than that of a group of electrodes at the position of the electrode group so as to prevent the developer which has been passed over the electrodes from flowing outside of an image area at the downstream side of the group of electrodes.

Abstract: A voltage having a polarity opposite to that of a voltage used applied to a light source in a period for reading or recording of a picture image is applied to the light source during predetermined periods other than the operational period to realize restoration of luminance of the light source, prolongation of operational life of the light source and high speed reading or recording speed.

Abstract: A picture image processor wherein a white reference value with respect to an analog output of video data is established in response to a change in luminous energy, and the white reference output is compared with the video data output to obtain a binary signal, and this signal is stored in a memory system; then, the stored signal is subjected to a digital-to-analog conversion to form a reference signal, which is inputted to an A/D converter in synchronism with the respective picture elements of an original reading signal, and/or a dark or bright voltage value of the image sensor which has been previously stored is corrected on the basis of such gain from an amplifying means which changes automatically, and the output of the above image sensor is corrected based on the voltage value thus corrected.

Abstract: An optical writing device includes a substrate, an array of pixel electrodes, each of which is provided with a luminescent material, a filament electrode disposed in parallel with the array, an enclosure member for enclosing the pixel and filament electrodes and the array, and driver I.C. chips mounted on the substrate. Such a structure may be made extremely compact in size with low cost.

Abstract: A switching voltage regulator (86) is controlled to produce a low output voltage when the power is first turned on and subsequently to produce a high output voltage after a predetermined length of time has elapsed, thereby eliminating overloads due to initial surge currents.