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"Transmission of documents via telephone wires is possible in principle, but the apparatus required is so expensive that it will never become a practical proposition."
Dennis Gabor, British physicist
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| Number | Title | Issue Date |
| 6091914 | Liquid developer concentration measuring apparatus of an image processor An apparatus for measuring the concentration of a liquid developer of an image processor includes: a housing; a rotating roller disposed inside the housing, a driving source for rotating the roller; a developer supplier for supplying the developer to the ... | 07/18/2000 |
| 5933685 | Apparatus for detecting concentration of developer by measurement of optical transmissivity A developer concentration detection apparatus is provided, which includes a base member in which a developer accommodation space is formed, an electrode plate member installed in the base member so that a toner included in a developer in the developer acc... | 08/03/1999 |
| 5812904 | Image forming apparatus and method for controlling charging potential differently between image forming area and non-image forming area of photosensitive drum A system for controlling a potential of a photosensitive drum for a laser beam printer having a photosensitive drum on which an electrostatic image is formed, a charger for applying voltages differentially to an image forming area where the photosensitive... | 09/22/1998 |
| 5812905 | Method and apparatus for controlling a charge voltage of an OPC drum to be an optimum value A method and apparatus for controlling a charge voltage of an organic photoconductive (OPC) drum in an electrophotographic image forming device, which are to improve the quality of the image by charging the OPC drum surface uniformly independent of voltag... | 09/22/1998 |
| 5666596 | Process cartridge of an image forming device A process cartridge of an image forming device in which a driving gear for driving a charging roller and a transfer roller is not utilized. The process cartridge of an image forming device, comprising: a developing unit having a photosensitive drum and a ... | 09/09/1997 |
