The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 31, 1981
Filed:
Aug. 20, 1979
Edwin R Phillips, Rosemont, PA (US);
Raymond J Stankiewicz, Philadelphia, PA (US);
Sperry Corporation, New York, NY (US);
Abstract
An electrostatic copying machine includes a reservoir for liquid developer made up of toner particles in a dispersant. A photoconductive drum, adapted after receiving a latent electrostatic image thereon to pass through the liquid developer in the reservoir and to have an electrostatic image developed on the drum. A metering roller for removing excess dispersant is positioned between the reservoir and an air knife which projects a sharp thin jet of pressurized air at about a 45 degree angle with respect to the surface of the drum. The air pressure produced by the air knife drives any remaining spent dispersant on the surface of the drum back to the reservoir by way of the metering roller and the latent image on the drum is subsequently transferred to paper.