摘要:
An image forming apparatus includes a device operable with a first rated voltage and a second rated voltage which is different from the first rated voltage, an image forming apparatus for forming an unfixed image on an image supporting member, a fixing device for fixing the unfixed image on the image supporting member, the fixing device including a heating roller heated by a heater and a back-up roller contacted to the heating roller, the rollers starting rotation under a predetermined condition, wherein the predetermined condition is different between when the apparatus is operated with the first rated voltage and when it is operated with the second rated voltage.
摘要:
A method of implementing a fast video encoder by approximating a frame motion vector is introduced. MPEG-2 encoding uses both field and frame vectors in the encoding process. To implement an encoder in an efficient manner, an approximated motion vector created from two field motion vectors is used. The frame motion vector may be determined using the two field motion vectors alone, or by using the two field motion vectors in conjunction with their respective absolute error values. By using the disclosed methods, a motion estimation part for generating frame motion vector is not necessary. Only two field motion estimation parts are required to determine the field motion vectors, the frame motion vector is then approximated using the two field motion vectors. The cost and complexity of a digital video encoder system is thereby reduced.
摘要:
An image forming apparatus comprises a data receiver for receiving encoded character or graphic information in the unit of a page from the outside; a pixel converter for converting the encoded character or graphic information into pixel information; an image forming device for forming an image on a recording medium based on the pixel information; and a feeder for feeding the recording medium to said image forming device. In the apparatus, the feeder is adapted to feed the recording medium to a predetermined position prior to the completion of pixel conversion of a page by the pixel converter.
摘要:
An image forming apparatus, which is capable of obtaining high quality images, having a recording member on which a latent image is formed, a charging voltage generating portion which is positioned in contact with the recording member for the purpose of applying charging voltage containing an AC component to the recording member and from which said charging voltage is supplied, an application device for applying an AC component having a frequency, which is different from that of the AC component of the charging voltage, to the recording member, an electric current value control circuit for detecting an output AC value of the charging voltage generating portion so as to make the output AC value to be a predetermined value, and an erroneous operation preventing circuit for preventing an erroneous operation of the electric current value control circuit taken place due to an introduction of the AC component applied by the application device into the charging voltage generating portion.
摘要:
Disclosed is an image forming apparatus having a thermal fixing unit and a cooling fan. There is an input device for inputting print data which is sent from an external apparatus; a timer for starting an operation upon completion of an image forming operation; and a controller for controlling the thermal fixing unit and the cooling fan on the basis of an operating state of the timer.
摘要:
An image forming apparatus has a control unit which controls an image forming unit in accordance with a detection signal from an abnormal power condition detector which detects an abnormal condition of a power suply such as a voltage drop or a momentary break. The control unit stops the image forming unit a predetermined time period after the detection of the abnormal condition of the power.
摘要:
There is disclosed a copying or printing apparatus utilizing sequence control with micro-computer and capable of preventing erroneous function at the start of power supply. The apparatus is provided with plural processors for image reproduction, a controller for controlling some of the processors and switch for power supply for energizing the controller and the processors. The controller is reset in response to the actuation of said power supply switch, and then said processors are energized.
摘要:
The invention provides a paper feed control device having paper feed rollers for feeding a paper sheet such as an original to a predetermined position, a first sensor for detecting the paper sheet, a second sensor for detecting leading and trailing ends of the paper sheet, a microcomputer for controlling the rollers in response to the outputs signals from the sensors, and a compensating circuit for compensating the level of the output signal from the second sensor which is maintained in a non-detecting state until the paper sheet completely passes through the second sensor. Therefore, even if punched holes for filing are formed on the paper sheet, the punched hole may not be detected as the trailing end of the paper sheet, resulting in proper feeding.
摘要:
Provided is an image processing apparatus adapted to inform the user of the time that is required to elapse before an image forming command can actually be executed, thereby eliminating any anxiety that the user might otherwise experience. Specifically, there is provided an image processing apparatus for forming an image by analyzing and decoding a received printing signal and then storing the signal in a page memory in the form of code data, and converting the the code data stored in the page memory into a bit image, including a processing-time calculating unit for calculating time, which is required for conversion to the bit image, based upon analysis of the inputted printing signal, and an informing unit for informing a user of the time calculated by the processing-time calculating unit, wherein the processing-time calculating unit further calculates preparation time required for forming the image from the bit image.
摘要:
A recording apparatus comprises a recording unit for recording information onto a recording medium, a feeder for feeding the recording medium to the recording unit, a detector between the recording unit and the feeder for detecting the recording medium being fed, and a controller for inhibiting the recording operation of the recording unit when the detector detects the recording medium before the elapse of a predetermined period of time from the start of the feeding operation of the feeder.