Masked magnetic brush direct writing for high speed and color printing
US5327169A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 5, 1992 |
| Grant date | Jul 5, 1994 |
| Priority date | — |
| Expiry date | Aug 5, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2217/0025
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Direct electrostatic printing apparatus including structure for delivering developer or toner particles to a printhead forming an integral part of the printing device. The printing device includes, in addition to the printhead, a conductive shoe which is suitably biased during a printing cycle to assist in the electrostatic attraction of developer through apertures in the printhead onto the copying medium disposed intermediate the printhead and the conductive shoe. The structure for delivering developer or toner is adapted to deliver toner containing a minimum quantity of wrong sign. To this end, the developer delivery system is conventional magnetic brush which delivers toner directly to the printhead structure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.