Electrophotography – Image formation – Development
Patent
1995-07-21
1997-10-28
Ramirez, Nestor R.
Electrophotography
Image formation
Development
399256, 399260, 399263, G03G 1506
Patent
active
056825846
ABSTRACT:
A developer transporting device for electrophotographic copiers has a pair of walls, a rotating shaft supported between the pair of walls, a first transporting member provided on the rotating shaft, a rotating cylindrical screw concentrically sheathing the rotating shaft and having a second transporting member provided on an exterior surface thereof and apertures provided at both ends thereof, an inflow pipe mounted on one wall of the pair of walls and extending into one end of the cylindrical screw and provided with a developer inflow opening facing an aperture of the cylindrical screw, and an outflow pipe mounted on the other wall of the pair of walls and extending into the other end of the cylindrical screw and provided with a developer outflow opening facing an aperture of the cylindrical screw. Developer outside the cylindrical screw is transported from the outflow pipe to the inflow pipe by the second transporting member and developer in the cylindrical screw is transported from the inflow pipe to the outflow pipe by the first transporting member. Developer is thus circulated inside and outside the cylindrical screw in a manner to ensure proper mixing thereof. The cylindrical screw preferably includes interior and exterior surfaces which have different coefficients of friction for more effective transport of the developer.
REFERENCES:
patent: 5189474 (1993-02-01), Miya et al.
Hada Yoshinobu
Hamamichi Suguru
Hattori Yoshihiro
Yoshimoto Shin-ichi
Minolta Co. , Ltd.
Ramirez Nestor R.
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