 Color eliminating circuit |
| What we claim: 1. A color eliminating circuit for use in a color television system comprising: an ... |
|
| Video recording apparatus with color killer |
| We claim as our invention: 1. A video recording apparatus comprising: a video signal recording ... |
|
| Tape recording method and apparatus |
| In accordance with the present invention, these and other objectives are achieved by providing an ... |
|
| Signal recorder with deferred recording |
| What is claimed is: 1. An audio/visual signal recorder for recording an episode of a first audio/... |
|
| Summary frames in video |
| It is therefore an object of the present invention to provide summary frame windows on the screen ... |
|
| Apparatus and method for controlling the recording of television programs |
| To achieve the object of the present invention, the present invention provides the electronic ... |
|
| Digital broadcast receiver outputting video and program information |
| Therefore, it is a primary object of this invention to provide a digital broadcast receiver which ... |
|
| Device and method for displaying broadcast program guide in a programmed recording system |
| The object of the present invention is to provide a broadcast program guide displaying device and ... |
|
| Reproducing method and apparatus |
| It is therefore an object of the present invention to provide a reproducing method and apparatus in ... |
|
|
Image forming apparatus provided with image eraser
| Details |
Inventors: Nishiyama, Haruo; Matsumoto, Masanori; Watase, Shigeru; Horiuchi, Takao;
Assignee: Sharp Kabushiki Kaisha (Osaka, JP)
Primary Examiner: Pendegrass; Joan H.
Assistant Examiner:
Attorney, Agent or Firm:
To maintain an image eraser used for erasing a toner image printed on a sheet operable wastes power, and additionally, a manual operation is required for loading a sheet feed portion with sheets from which the printed image is removed for reuse. The main body of an image forming apparatus is provided with a tray for image erasure and a feed roller for feeding sheets from the tray. Disposed in a passage for transporting the sheets from the tray is an image eraser comprising a nozzle for applying a treatment for removal of toner, a toner removal roller and a pressure roller and the likes. By means of a transport roller, sheets are transferred from the image eraser to an intermediate tray or a registration roller for feeding sheets to an image forming position. The image eraser is actuated for image erasure while the image forming apparatus is not performing an image forming operation. The sheets from which the image is removed are received by the intermediate tray which, in turn, feeds the sheets for image forming operation if it is determined before execution of the operation that the sheets in the intermediate tray match with a sheet size specified for the operation. |
|
DETAILED DESCRIPTION In view of the foregoing, it is an object of the present invention to provide an image forming apparatus which is adapted to operate on a predetermined power for power conservation by executing the toner erasure operation when the image forming apparatus is not performing an operation and which allows the essential functions thereof, or the image forming operation, to be preceded.
Another object of the invention is to provide an image forming apparatus which reduces the work of the user for removing the toner and provides an efficient toner erasure operation.
Particularly, it is another object of the invention to provide an image forming apparatus which eliminates a need for an additional portion for receiving sheets through the toner erasure operation by transferring such sheets to an available sheet feeding portion essentially possessed by the image forming apparatus.
For achieving the foregoing objects of reducing the work of the user for erasing the toner image, conserving power and allowing the image forming operation to precede, in particular, the image forming apparatus of the invention adapted to transfer an image formed on a record medium onto a sheet transported to place and to discharge the resultant sheet out of the apparatus, which image forming apparatus comprises a tray for image erasure for receiving unnecessary sheets on which images are formed (hereinafter described as "unnecessary copies", sheet feeding means for feeding the unnecessary copies from the tray for image erasure, an image eraser disposed in a passage for transporting the unnecessary copies fed by the sheet feeding means and erasing the image thereon, idle-period detecting means for detecting a period in which the image forming apparatus is idling; and erasure control means responsive to a detection signal from the idle-period detecting means to actuate the image eraser, to send the unnecessary copies from the tray for image erasure and to execute an image erasure operation.
In case where the image eraser requires a heat source for the image erasure operation, the erasure control means responds to a detection signal from the idle-period detecting means to start supplying power to the heat source while reducing power supply to a high-power consuming portion of the image forming apparatus or shutting off power supply generally to the image forming operation, thereby conserving the power
|
|
TV Signal 
