Integrated microchannel print head for electrographic printer
US6037957A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 11, 1997 |
| Grant date | Mar 14, 2000 |
| Priority date | — |
| Expiry date | Aug 11, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/348
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Electrographic printing apparatus for forming a toner image on a recording medium includes: a magnetic brush having a rotatable magnetic core and a stationary outer shell; a developer supply for supplying a magnetic developer powder to the magnetic brush; a print head on the outer shell; and a receiver electrode arranged in spaced relation to the print head to define a recording region through which the receiver can be moved. The print head includes an array of microchannels for forming a plurality of parallel lines of developer in the channels, a corresponding plurality of transfer electrodes located in the microchannels for selectively transferring developer from the lines to a receiver, driver circuitry for generating and applying transfer signals to the transfer electrodes, a power supply connection for applying power to the drive circuitry, a print signal input connection for applying print signals to the print head, the print signal input including a number of electrical conductors fewer than the number of transfer electrodes, and a logic and control circuit for applying the print signals to the drive circuitry.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.