Title:
COLOR IMAGE RECORDER
Document Type and Number:
Japanese Patent JP3183540
Kind Code:
B2
Abstract:
PURPOSE: To prevent the skipping of a transfer and simultaneously, a failure in the transfer caused by the scattering of toner by setting order for superimposing/transferring in the order of development with color toner whose average grain diameter is large.
CONSTITUTION: Electrostatic latent images formed on photosensitive drums 1A-4A, are developed by developing units 1B-4B incorporating the developers of yellow, cyan, magenta, and black, in that order. At this time, an average toner grain diameter is set, for instance, the yellow is 14μm, the cyan is 12μm, and the magenta and black are 10μm. The toner images of each color are superimposed and transferred on a transfer form, based on the action of transfer chargers 1C-4C, in the transfer order of the yellow, cyan, magenta, and black, which is developing order. Further, at least, an addition agent for improving flowability, for instance, a silica addition agent is added to the black toner. When the silica addition agent is added to the toner of all colors, the amount of addition of the silica addition agent to the black toner is greater than that to the toner of the other colors.
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Inventors:
Itaru Matsuda
Application Number:
JP26630191A
Publication Date:
July 09, 2001
Filing Date:
October 15, 1991
Export Citation:
Assignee:
株式会社リコー
International Classes:
G03G15/01; G03G15/16; (IPC1-7): G03G15/01
Domestic Patent References:
| JP255368A | ||||
| JP32779A | ||||
| JP2143265A | ||||
| JP387841A | ||||
| JP63149662A | ||||
| JP1267569A | ||||
| JP255368A |
Attorney, Agent or Firm:
Takehisa Ito