James River Graphics, Inc.

Sie, Inc.

Lee R Brown

John D Plumadore

Thomas M Davison

Jose L Herrera

L Herrera Jose

An improved electrographic recording apparatus and method. An electrographic recording medium has a charge retaining front surface on which charge is distributed in a pattern representing a desired image to be recorded, and a field permeable conductive layer. While charge is being deposited on the charge retaining surface of the electrographic medium, a field is established and maintained behind the rear surface of the medium, said field penetrating the conductive layer and having a field strength on the charged side of the medium that opposes a field that causes charge to be deposited on the charge retaining surface of the medium. In another aspect of this invention, the recording apparatus has a toner application station that is located apart from the charge depositing means, and a second field, having the same polarity as the first field, is established and maintained behind the rear surface of the electrographic medium at the toner station.

Electrographic recording apparatus and method

Electrographic recording method of applying an electric field opposite

A well-logging camera for producing API format with traces utilizing a unique modulated laser light path to expose an in camera processable, electrophotographic film. After exposure, the film passes through an easily removeable, developing means having means stripping the film of excess developer. The film is driven through the camera by edge drive mechanism in which rotative force from the drive rollers is effectively transferred to skewed pressure rollers for effective drive.

Well-logging camera using modulated laser light path for exposing in

Growing community of inventors

Houston, TX, United States of America

Lee R Brown