摘要:
A method and an apparatus for color conversion capable of converting a particular color of an image original into another color as desired, in which indication is made as to what color of the image original colors other than that designated for the color conversion can be converted into, and, on the basis of this indication, designation for the color conversion in the image original colors other than that previously designated can be done, and, further, on the basis of this color conversion designation, a set of the color-separation filter and the developing color can be automatically selected.
摘要:
Color electrophotographic method and apparatus capable of providing color representation faithful to an original by the provision of well designed color balance control devices. The method of the invention comprises a step of exposing a color resolving image of an original onto a photosensitive medium to develop an electrostatic latent image formed according to the resolving image or an electrostatic image according to the first-mentioned image with fixed color developer, the step being repeated in number according to the color resolution to represent color one above the other on an image carrier such as a photosensitive medium.
摘要:
A copying machine including a photoelectric converter to photoelectrically convert an original image, a reference density signal generator to generate reference density signals, an A/D converter to A/D convert the signal produced by the photoelectric converter based on the reference signals from the reference density signal generator, a regional value allotment circuit which generates regional value signals for two values sequentially in synchronism with a picture element read by the photoelectric converter, a selector to select the regional value or regional value allotment, and an output device to output a reproduced signal from the selected regional value allotment signal coming from the regional value allotment circuit and the converted signal coming from the A/D converter in order to obtain a copy having desired intermediate tone.This application is a continuation of application Ser. No. 937,505 filed 12/03/86, which in turn is a continuation of application Ser. No. 219,976, filed 12/24/80, now abandoned.
摘要:
An image forming apparatus has a rotatable member, a plurality of processing devices for forming an image on the rotatable member and transferring the image to transfer material, a device for fixing the transferred image, circuitry for controlling the operation of the rotating member and processing devices so that when the power switch is turned on at least the fixing device is turned on and when the power switch is turned off the fixing device is turned off while the rotation of the rotatable member is continued. The apparatus also includes a signal generating device associated with one of the processing devices, a first detector for detecting transfer material and a second detector for detecting the position of an original carriage, and circuitry for checking for a paper jam by counting signals from the time of the second detector signal. The apparatus also includes a detector for detecting the home position of the original carriage, setting structure for setting the carriage to the home position and resetting structure for preventing the start of processing immediately upon operation of a manual start switch.
摘要:
A liquid quantity detecting device comprises a liquid container, liquid circulating means disposed within the liquid container, and means for detecting bubbles created by the liquid circulating means when the liquid level has been lowered. Thus, decrease in quantity of liquid may be detected in accordance with the detection signal from the detector means.
摘要:
In image formation control apparatus having a process unit for forming an image on a recording medium and mechanisms for assisting in the image formation, there is provided a first controller for controlling the timing of the process unit. A second controller is provided for rendering at least a portion of the process unit inoperative when an image formation is not being executed, and for thereafter rendering at least one of the assisting mechanisms inoperative while continuing to apply power to the first controller to enable image formations to be resumed.
摘要:
An original feed control unit for a copying machine has programming means for variably setting a stop position of an original fed by an original feed device prior to the start of the copy operation. By varying the stop position, the size of the margin formed on the copy paper can be varied. The position of a detector for detecting a jam of the original may be also varied in accordance with the desired size of the margin in order to properly detect a jam.
摘要:
In a copying apparatus having an endless photosensitive medium, a number of copy process devices for forming an electrostatic latent image on the photosensitive medium, for developing the latent image, for transferring the developed image and for cleaning the photosensitive medium, there is provided circuitry for controlling the operation of at least one of the copy process devices in accordance with the generation of a predetermined number of clock signals. The control circuitry acts to start the initiation of the copy process after counting a predetermined number of signals and to stop the rotation of the medium at a different rotational position from the start position. The apparatus also includes a jam detecting device and reciprocating member for the formation of the latent image, the position of which is detected for utilization in the control circuitry.
摘要:
In a feed cassette device which comprises a cassette corresponding in size to copy mediums to be contained therein, and a cassette table suited to receive the cassette thereon, the cassette has a positioning guide member and the cassette table has a cassette positioning portion and a member for urging the cassette toward the positioning portion. The feed cassette device also has means for locking the cassette in a predetermined position when it is loaded on the cassette table.
摘要:
A specified original that is not supposed to be copied is marked with a pattern that is formed by infrared reflected light. A copying apparatus includes a detecting unit for detecting the pattern and determines that an original is the specified original in accordance with the detection by the detecting unit. A copying operation is controlled in accordance with the determination of whether the original is the specified original that is not supposed to be copied.