Abstract: An image forming apparatus suitable for use in a laser beam printer includes an image forming unit for forming an image on a photoconductor, and a reproduction unit for reproducing a high density image and a halftone image on the photoconductor. A detector then detects the density of the high density image and the halftone image formed on the photoconductor. A controller controls an image forming condition of the image forming unit based on a detection result by the detector.

Abstract: An image forming apparatus comprises includes a feeder means and recorder. The feeder feeds a sheet of recording paper to a predetermined position in response to a spare paper feed signal instructing the feeding of the sheet of recording paper to the predetermined position preliminarily, and then feeds the sheet of recording paper being stopped at the predetermined position again in response to a record request signal. The recorder records an image on the sheet of recording paper fed by the feeder means through an electrophotographic process. The recorder means starts preparation to execute the electrophotographic process upon receiving the spare paper feed signal. As a result, throughput is increased without causing other problems.

Abstract: An elastic blade which is maintained in contact with the developing sleeve for defining the thickness of one-component developer to be transported by the developing sleeve to a developing area, is composed of an elastic base member, and a surface layer coated thereon and giving friction on the one-component developer, and the surface layer contains a substance chargeable frictionally to a polarity opposite to the triboelectric polarity of the one-component developer and another substance chargeable frictionally to a polarity the same as the triboelectric polarity of the one-component developer, and is charged frictionally, in total, to a polarity opposite to the polarity of the one-component developer.

Abstract: An image forming apparatus includes a feeder means and a recorder. The feeder feeds a sheet of recording paper to a predetermined position in response to a spare paper feed signal instructing the feeding as the sheet of recording paper to the predetermined position preliminarily, and then feeds the sheet of recording paper being stopped at the predetermined position again in response to a record request signal. The recorder records an image on the sheet of recording paper fed by the feeder means through an electrophotographic process. The recorder means starts preparation to execute the electrophotographic process upon receiving the spare paper feed signal. As a results, throughput is increased without causing other problems.

Abstract: A shaft furnace for melting copper solid into copper melt has been controlled by manual operation with reference to the actual storage quantity of the holding furnace so far. The burner air pressure of each zone of the shaft furnace is controlled by the actual storage quantity and the time change of it using Fuzzy Logic. The temperature of copper melt is adopted as another input signal. The proportion of burner air pressure of the zones is revised by the melt temperature. Automatic control basing upon the present invention decreases the fluctuation of storage quantity of the holding furnace.

Abstract: A recording apparatus includes an input circuit for inputting recording data, a process circuit for performing a recording operation on a photosensitive body on the basis of the recording data input from the input circuit, a designating circuit for designating a recording density, and a control circuit for controlling an operating condition of at least a high-voltage circuit on the basis of designation by the designating circuit. The process circuit includes the high-voltage circuit used for the recording operation.

Abstract: An image forming apparatus includes an area modulation means for forming a halftone image signal by area modulation according to input image data, and a recording unit for performing recording using a particle-type recording material according to the halftone image signal, wherein the length of a short side of a minimum modulation area of the area modulation means formed by the recording unit is set to 0.7-4 times an average particle size of the particle-type recording material.