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US 4,233,611 AGranted
Recording head for electrostatic printing apparatus
AssigneeRank Xerox Ltd.
InventorsKeita Nakano, Yasuo Shibata
Life of this patent
Estimating the term…
Abstract
An electrostatic printing apparatus having a transfer medium with a charge retentive surface for forming an electrostatic latent image, and a developer to develop the electrostatic latent image on the transfer medium for transfer to a support material. An array of printing electrodes supported by a flexible insulator abutting the transfer medium are uniformly spaced from the transfer medium.
Claims15
An electrostatic printing apparatus comprising
- a recording medium having a charge retentive surface for forming an electrostatic latent image,
- means for developing the electrostatic latent image formed on the recording medium,
- a support material,
- means for transferring the developed electrostatic latent image to the support material,
- an array of marking electrodes disposed adjacent the recording medium for selectively charging the charge retentive surface, and
- a flexible insulator supporting the marking electrodes, the insulator adjoining the recording medium whereby to uniformly space the array of electrodes from the recording medium.
3 more elements
An electrostatic printing apparatus comprising
- a recording medium having a charge retentive surface for forming an electrostatic latent image,
- means for developing the electrostatic latent image formed on the recording medium,
- a transfer material,
- means for transferring the developed electrostatic latent image to the transfer material,
- a brace,
- an array of marking electrodes, disposed adjacent the recording medium for selectively charging the retentive surface, each of the electrodes having an elongated member and a flat tip,
- a flexible insulator secured to the brace, the insulator supporting the marking electrodes, the marking electrodes being disposed at an acute angle with respect to the recording medium,
- a spring biasing the insulator into contact with the recording medium, the insulator comprising a first portion and a second portion, the second portion overlying the electrodes, the first portion being offset with respect to the second portion exposing the flat tip of each electrode to the recording medium, the first portion contacting the recording medium whereby the electrodes are uniformly spaced within 100 microns of the recording medium.
5 more elements
Dependencies are inferred from the claim text.