Gas separation: apparatus – Magnetic separating means
Patent
1978-03-07
1979-09-25
Welsh, John D.
Gas separation: apparatus
Magnetic separating means
96 14, 355 3SC, 96 1C, 427 14, G03G 1302
Patent
active
041689747
ABSTRACT:
The present invention aims at improvement in the image forming method, wherein ion current is modulated in an image form, on the basis of which a secondary electrostatic latent image is formed on a recording sheet, an insulated drum, and other recording media, and the thus formed electrostatic latent image is developed. In more detail, the entire region of such sheet and drum where such secondary electrostatic latent image is formed is uniformly charged beforehand to a desired potential, whereby the fogging phenomenon to occur at the time of development, and changes in the formed image which take place due to variations in the modulating quantity of the ion current on account of deterioration in an ion current modulating element can be prevented. Setting of the member to form thereon such secondary electrostatic latent image at a desired arbitrary potential can be done by, for example, varying the voltage to be applied to a grid provided in a corona discharger.
REFERENCES:
patent: 3543022 (1970-11-01), Lennon
patent: 3788739 (1974-01-01), Coriale
patent: 3997259 (1976-12-01), Bhagat
Ando Yujiro
Ohara Katsunobu
Tanaka Kazuki
Yoshida Nobutoshi
Canon Kabushiki Kaisha
Welsh John D.
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