Electrostatic print head

Details Electrostatic print head Electrostatic print head

1979-10-22

1982-07-06

Curtis, Marshall M.

Recorders

Electric recording

Electrochemical

3461531, 346159, 178 30, G01D 1510

Patent

active

043386148

ABSTRACT:
An improved electrostatic print head is disclosed comprising a corona source, an aperture mask, a slotted focus plane, and a back plane electrode for supporting a moving dielectric print medium. The aperture mask includes two rows of staggered circular apertures which are surrounded by individual aperture electrodes on the side of the mask facing away from the corona source. The side of the aperture mask facing the corona source has a continuous conductive layer thereon which is biased at a fixed potential. The aperture electrodes are selectively pulsed with a control potential to control the flow of ions from the corona source through the two staggered rows of apertures and the slotted focus plane to form any desired dot-matrix latent image on the moving dielectric print medium. The center line of the slotted focus plane is parallel to the center line between the two staggered rows of apertures to focus the ion beams defined by the individual apertures toward the center line of the slot while intensifying the electric field in the imaging region. The slotted focus plane also compresses the cross section of the ion beams defined by the individual apertures into ellipses having their minor axes parallel to the direction of motion of the dielectric print medium, permitting higher ion densities to be deposited on a moving dielectric print medium for a given final dot size and an improved resolution of the final dot-matrix image.

REFERENCES:
patent: 2706788 (1955-04-01), Wiley
patent: 2890343 (1959-06-01), Bolton
patent: 3266046 (1966-08-01), Boyd
patent: 3358289 (1967-12-01), Lee
patent: 3372400 (1968-03-01), Epstein et al.
patent: 3438053 (1969-04-01), Howell
patent: 3460156 (1969-08-01), Byrd
patent: 3611414 (1971-10-01), Frank
patent: 3611419 (1971-10-01), Blumenthal
patent: 3689935 (1972-09-01), Pressman et al.
patent: 3715762 (1973-02-01), Magill et al.
patent: 3742516 (1973-06-01), Cavanaugh et al.
patent: 3765027 (1973-10-01), Bresnick
patent: 3961574 (1976-06-01), Fotland
patent: 3962969 (1976-06-01), Watanabe et al.
patent: 3971465 (1976-07-01), Benn
patent: 3986189 (1976-10-01), Van Biesen et al.
patent: 4013004 (1977-03-01), Watanabe et al.
patent: 4016813 (1977-04-01), Pressman et al.
patent: 4068585 (1978-01-01), Thompson
patent: 4088891 (1978-05-01), Smith et al.
patent: 4137537 (1979-01-01), Takahashi et al.
Controlled Ion Flow Electrostatic Printing; Pressman 1976, SID Int. Symp.; pp. 26-27.

Affiliated with

Also associated with

Rating

Electrostatic print head does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Electrostatic print head, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electrostatic print head will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2171342