Apparatus and method for increasing the coverage area of a control electrode during direct electrostatic printing
US5847733A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 22, 1996 |
| Grant date | Dec 8, 1998 |
| Priority date | — |
| Expiry date | Mar 22, 2016 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2/4155
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method for improving the print quality of an image recording apparatus in which charged particles are deposited in an image configuration on an information carrier is described. The method includes conveying the charged particles to a particle source adjacent to a back electrode; positioning a particle receiving information carrier between the back electrode and the particle source; providing a control array of control electrodes; providing at least one set of deflection electrodes; creating an electric potential difference between the back electrode and the particle source to apply an attractive force on the charged particles; connecting variable voltage sources to the control electrodes to produce a pattern of electrostatic fields to at least partially open or close passages in each electrostatic field by influencing the attractive force from the back electrode, thus permitting or restricting the transport of charged particles towards the information carrier; and connecting at least one deflection voltage source to at least one set of deflection electrodes to produce deflection forces modifying the symmetry of the electrostatic fields, thus controlling the trajectory of attract…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.