← Back to Patent Explorer
US3877963A Expired / Lapsed US ⏱️ 0.0 years remaining

Reversal liquid developing using a development electrode and corona charging

Assignee: Individual
•
Filing: 1974-01-28
•
Granted: 1975-04-15
•
Expires: 1994-01-28
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract Toner images are formed by providing an electrostatographic recording member having an imaging surface and a rear surface, forming an electrostatic latent image on the imaging surface, positioning a development electrode parallel and spaced from the imaging surface, applying corona ions to the rear surface of the recording member, the corona ions having a polarity opposite to the polarity of the electrostatic latent image, and contacting the imaging surface with toner particles to deposit at least a portion of the toner particles on the imaging surface in image configuration.

Inventors

  • 👤 Masamichi Sato

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-04 04:19
CPC Classifications
G; G03; G03G; G03G13/00; G03G13/06; G03G13/10

Claims Analysis

Total Claims: 3
Claim 1
Independent Claim 10 words
THE INVENTION OF CLAIM 1 WHEREIN THE FUGITIVE VEHICLE IS
Claim 2
Dependent Claim 26 words
A method according to claim 1 including maintaining the spacing between said development electrode and said imaging surface between about 1/3 millimeter and about 3 milLimeters.
Claim 3
Dependent Claim 19 words
A method according to claim 1 wherein said toner particles have the same polarity as said electrostatic latent image.

References Cited (Backward Citations)

US3311490A Cited
US3369917A Cited
US3510419A Cited
US3729334A Cited
US3625681A Cited
US3594159A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1978-04-14 1978-10-14 1979-04-15 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1982-04-14 1982-10-14 1983-04-15 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1986-04-14 1986-10-14 1987-04-15 $7700.00 Window Closed / Lapsed

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag