Direct printing method utilizing dot deflection and a printhead structure for accomplishing the method
US5984456A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 5, 1996 |
| Grant date | Nov 16, 1999 |
| Priority date | — |
| Expiry date | Dec 5, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2217/0025
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A printhead structure and a method are used in direct electrostatic printing wherein streams of charged toner particles from a source of toner particles are directed onto an image carrier, such as a sheet of paper. A first set of print electrodes surround apertures through which the streams of toner particles flow. Voltages are selectively applied to the print electrodes to control the flow of toner particles through the respective apertures. A set of deflection electrodes are also associated with the apertures. Deflection voltages from at least one deflection voltage source are applied to the deflection electrodes to increase the convergence of the toner particles onto the information carrier and also to control the trajectories of the toner particles onto predetermined dot locations on the information carrier so that each aperture may provide toner particles to multiple lateral locations on the information carrier.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.