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US 4,346,982 AGranted
Electrophotographic recording device
AssigneeFujitsu Limited
InventorsJunzo Nakajima, Masayuki Hida, Masakatsu Horie
Life of this patent
Estimating the term…
Abstract
An electrophotographic recording device suitable for a Form Overlay System, by which a latent image is formed on a surface of a light-sensitive recording medium, consisting of a first area which is maintained at an original potential, a second area which is maintained at a partially reduced potential and a third area which is maintained at a potential of zero.
Claims6
An electrophotographic recording device comprising:
- a light-sensitive recording medium, means for uniformly pre-charging the surface of said light-sensitive recording medium, means for forming a latent image of a picture on the charged lightsensitive recording medium by exposure of a positive optical image of the picture, means for forming latent images of characters on the charged light-sensitive recording medium by exposure of negative optical images of the characters, and means for development of the latent images formed on the light-sensitive recording medium including a magnetic roller having a potential selected as a predetermined value between the potential of the precharged light-sensitive recording medium and zero potential and single component toner for development of said latent images of both the picture and the characters.
Dependencies are inferred from the claim text.