Meterless single component development

Details Meterless single component development Meterless single component development

1990-06-14

1991-09-10

Grimley, A. T.

Photocopying

Contact printing

Light boxes

118653, 118661, 355245, 355260, G03G 1506

Patent

active

050478060

ABSTRACT:
An apparatus which develops a latent image recorded on an image receiving member with marking particles. A chamber in a developer housing stores a supply of charged marking particles. The marking particles having a charge distribution. A donor roll is positioned in the chamber of the housing to transport marking particles closely adjacent to the latent image to develop the latent image. A rotating, elongated member moves the marking particles. An electrical bias is applied between the elongated member and the donor roll to selectively attract marking particles from the elongated member to the donor roll. The marking particles attracted to the donor roller have a charge distribution with a selected range. The range of the charge distribution of the marking particles attracted to the donor roller is less than the range of the charge distribution of the marking particles being moved by the elongated member.

REFERENCES:
patent: 4036175 (1977-07-01), Philips et al.
patent: 4383497 (1983-05-01), Tejima
patent: 4407925 (1983-10-01), Liebman
patent: 4445771 (1984-05-01), Sakamoto et al.
patent: 4608328 (1986-08-01), Schwar et al.
patent: 4806992 (1989-02-01), Yasuda et al.
patent: 4833059 (1989-05-01), Tomura et al.
patent: 4972230 (1990-11-01), Wayman
patent: 4990958 (1991-02-01), Brewington et al.

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