Image forming apparatus

Details Image forming apparatus Image forming apparatus

1997-02-26

1999-06-22

Le, N.

Incremental printing of symbolic information

Ink jet

Ejector mechanism

347140, 399261, 399 53, B41J 206, B41J 2385, G01D 1506

Patent

active

059147385

ABSTRACT:
A convex-concave member with a plurality of protruding portions is provided on the inner surface of a toner holding body. A hitting member for hitting the protruding portions with rotation of the toner holding body is provided inside the toner holding body. As the toner holding body rotates, the hitting member hits an adjacent protruding portion on the upstream side of the protruding portion with which the hitting member have been in contact with respect to the rotation direction of the toner holding body. This vibrates the surface of the toner holding body, and weakens adhesive forces of the toner to the toner holding body. If the hitting member is disposed so as to hit the protruding portion opposing an opposite electrode, the adhesive forces of the toner are weakened only in a toner projection area, while an enough toner transport amount is ensured outside the toner projection area. Therefore, it is possible to achieve the weakening of the adhesive forces of the toner by vibrating the surface of the toner holding body with a relatively simple configuration, and to make attempts to reduce the size and costs of the image forming apparatus.

REFERENCES:
patent: 5097277 (1992-03-01), Schmidlin et al.
patent: 5712670 (1998-01-01), Kagayama
patent: 5790153 (1998-08-01), Takagi

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