Current sensing development control system for an ionographic printing machine
US5150135A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 20, 1990 |
| Grant date | Sep 22, 1992 |
| Priority date | — |
| Expiry date | Aug 20, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/0851
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An apparatus which develops an electrostatic image with marking particles. The apparatus includes a developer roller for transporting the marking particles to a position adjacent an electrostatic image for the purpose of developing the image. During deposition of the marking particles on the image, the apparatus senses the charge thereon and in response to the sensed charge, additional marking particles are dispensed into the developer roll housing for use by the developer roller. The apparatus further includes an impoved method for periodically determining the actual concentration of the marking particles within the developer housing in order to modify the rate at which the marking particles are replenished, thereby maintaining an equilibrium concentration of marking particles within the developer housing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.