Abstract: An image forming equipment in which a fluorescent lamp is so preheated by controlling the current flowing level for the fluorescent lamp on non-copying after the power source is turned ON such that light energy of the fluorescent lamp becomes an appointed value according to the ON state of the fluorescent lamp on copying when controlling the light energy of the fluorescent lamp in accordance with the signals which come from the light energy detecting means provided at an end part of a fluorescent lamp which is provided in the width direction of the document to read a document image and copy the same by reflecting light to the image surface of the document.

Abstract: The following is in reference to the electrostatic copying machine with image formation apparatus using the photo conductor.The invention is to compute the electrifier voltage that is able to get the desired charge at the developing section by detecting the charge capacity and potential falling amount in order to correct the change in charge amount affected by the potential falling. The invention is that the correction can be made even in the course of continuous processing and in order not to be affected by the aged deterioration of the photo conductor, memorize the voltage per photo conductor temperature after the correction of the processed number of sheets and renew the memory value with the latest data. The invention is that the degree of the potential falling by the temperature of photo conductor is affected by the quantity of light irradiated on the photo conductor--to change the degree of correction of potential falling in proportion to the temperature of the photo conductor.