Dual AC/dual frequency scavengeless development

Details Dual AC/dual frequency scavengeless development Dual AC/dual frequency scavengeless development

1991-08-02

1992-09-01

Grimley, A. T.

Photocopying

Contact printing

Light boxes

355261, 355328, G03G 1508

Patent

active

051443716

ABSTRACT:
A scavengeless
on-interactive development system for use in highlight color imaging. The use of dual frequencies for the AC voltages applied between the wires and donor and donor and image receiver of a scavengeless development system allows for greater gap latitude without degradation of line development. Dual frequency refers to the application of an AC voltage at one frequency to the wire electrodes and the simultaneous application of a different frequency AC to the donor structure for insuring proper positioning of the toner cloud relative to the imaging surface.
A relatively low frequency, for example, 2 to 5 kHz AC is applied betweeen the donor and the imaging surface. By applying a relatively low frequency AC to the donor roll, the development gap (or electrode wire to image surface) latitude is enhanced thereby allowing larger gaps to accommodate manufacturing and machine setup tolerances, such as donor roll runout. Application of a high frequency AC, for example, 5 to 15 kHz, between the electrodes and toned donor roll to generate a toner cloud substantially improves the uniformity of development by minimizing wire vibration.

REFERENCES:
patent: 3457900 (1969-07-01), Drexler
patent: 3900001 (1975-08-01), Fraser et al.
patent: 4078929 (1978-03-01), Sundlach
patent: 4308821 (1982-01-01), Matsumoto et al.
patent: 4478505 (1984-10-01), Tashiro
patent: 4486089 (1984-12-01), Itaga et al.
patent: 4568955 (1986-02-01), Hasoga et al.
patent: 4656427 (1987-04-01), Dauphinee
patent: 4810604 (1989-03-01), Schmidlia
patent: 4833504 (1989-05-01), Parker et al.
patent: 4868600 (1989-09-01), Hays et al.
patent: 4876573 (1989-10-01), Kamimura
patent: 4990958 (1991-02-01), Brewington et al.
patent: 4998139 (1991-03-01), May et al.
patent: 5010367 (1991-04-01), Hays
patent: 5021838 (1991-06-01), Parker et al.
patent: 5032872 (1991-07-01), Folkins et al.
patent: 5034775 (1991-07-01), Folkins

Affiliated with

Also associated with

Rating

Dual AC/dual frequency scavengeless development does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Dual AC/dual frequency scavengeless development, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dual AC/dual frequency scavengeless development will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-771276