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US3663219A Expired / Lapsed US ⏱️ 0.0 years remaining

Electrophotographic process

Assignee: Canon Inc
•
Filing: 1968-05-16
•
Granted: 1972-05-16
•
Expires: 1988-05-16
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Abstract

Abstract In an electrophotographic process in which the electrostatic latent image on a photosensitive plate is developed by a liquid developer and the resulting toner image is transferred to a copying material, an electric field is applied to the liquid developer squeezing means in order to prevent the disturbance of the toner image caused by the flow of toner particles in a carrier pool formed at the squeezing site. The electric field is applied in such a direction that toner particles are attracted to the photosensitive plate before transferring the toner particles to the copying material and/or toner particles are attracted to the copying material after transferring the toner particles to the copy material.

Inventors

  • 👤 Toru Takahashi

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-25 12:44
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/22; G03G15/28; G03G15/30; G03G15/06; G03G15/10; G03G15/11

Claims Analysis

Total Claims: 1
Claim 1
Independent Claim 131 words
An electrophotographic process for reproducing an original image on copying material comprising the steps of forming an electrostatic latent image of said original image on an electrophotographic photosensitive member, developing said electrostatic latent image with a liquid developer containing a liquid carrier and charged toner to form a toner image on said photosensitive member, contacting said toner image with said copying material and squeezing said photosensitive member and said copying material to remove excessive amounts of liquid carrier while applying an electric field which adheres said charged toner to the surface of said photosensitive member, and, thereafter, transferring said toner image to said copying material by contacting said copying material with said photosensitive member while applying an electric field which attracts the toner image to the surface of said copying material.

References Cited (Backward Citations)

US3128683A Cited
US3241957A Cited
US3147679A Cited
US3155546A Cited
US3284224A Cited
US3419411A Cited
US3355288A Cited
US3332396A Cited
US3368526A Cited
US3461843A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1975-05-16 1975-11-15 1976-05-16 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1979-05-16 1979-11-15 1980-05-16 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1983-05-16 1983-11-15 1984-05-16 $7700.00 Window Closed / Lapsed

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