摘要:
An image formation apparatus such as a color copier or color printer comprises a plurality of development units, a development bias power source to supply power sources to the development units, a switch for allowing the output power of the development bias power source to be supplied to the development unit selected in accordance with a sequence control signal for image formation generated from a sequence controller, and a power supply control circuit to selectively to supply the output power of the development bias power source to the development unit which is developing only for a development period of time of each development unit. The development units are fixedly arranged near the photosensitive drum on which an electrostatic latent image is formed. The development bias power source includes both an AC component and a DC component. Since the amplitude, frequency, DC potential, and the like of the development bias power source are switched for each development unit selected, it is sufficient to use only one expensive power source. In this manner, image deterioration by the mechanical vibration due to the movement of the development unit can be eliminated.
摘要:
In methods for immunologically assaying free lipoprotein associated coagulation inhibitor (hereafter abbreviated as "LACI") in a human inspection sample using a first antibody immobilized on an insoluble carrier and a labeled second antibody, a method for immunological assay of free LACI and a kit therefor wherein(i) any one antibody of the first antibody and the second antibody is a monoclonal antibody recognizing the polypeptide (K3) of the following amino sequence ##STR1## (hereafter referred to as a "K3-antibody"), and (ii) the other antibody is a monoclonal antibody recognizing the polypeptide (K1) of the following amino acid sequence ##STR2## (hereafter referred to as a "K1-antibody").
摘要:
There is disclosed a power supply device having a transformer including primary and secondary windings, for generating in said secondary winding a high voltage output corresponding to power supplied to said primary winding, a first switch for on-off switching power supplied to the primary winding of said transformer, a first signal generator for supplying a switching signal at a first frequency to said first switch, a rectifier for rectifying the high voltage output generated in the secondary winding of said transformer, and controller including a second signal generator for supplying a modulating signal at a second frequency lower than said first frequency, for modulating the output of said rectifier by means of controlling the power supplied to the primary winding of said transformer in accordance with said modulating signal.
摘要:
A power source apparatus includes a high-voltage power source for applying a high voltage to a charger in a printer or copying machine, series-connected resistors for detecting a voltage of a grid or shield of the charger, and a transistor, inserted between ground and the grid or shield, for controlling the voltage of the grid or shield in accordance with an output from the series-connected resistors. The transistor may be an npn, pnp, or field effect transistor.
摘要:
There is disclosed a power supply device capable of providing stable AC and DC output voltages. For this purpose an input voltage is chopped by a controlled switching device and supplied to a converter transformer to obtain a high output voltage at the secondary side, and the output voltage is separated in two portions for supply to two loads.
摘要:
A power supply device has improved power efficiency and stability for use in a copier or the like. The primary power supply to the device being switched with a constant turned-off period to achieve variable power supply control.
摘要:
There is disclosed a copier employing a square wave developing bias voltage instead of the conventional sinusoidal AC developing bias. Such square wave developing bias reduces the moving energy of the toner and prevents the discharge between the developing sleeve and the photosensitive drum.
摘要:
There is disclosed an electrophotographic image forming apparatus in which toner loss by deposition to non-image area is prevented by detecting the surface status of photosensitive member and applying thus detected state to the image developing device.