Electrostatic 3-D printer having rotating magnetic cores within developer rolls
US10279577B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 22, 2016 |
| Grant date | May 7, 2019 |
| Priority date | — |
| Expiry date | Apr 29, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/224
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A 3-D printer includes development stations that electrostatically transfer first and second materials to an intermediate transfer surface. The development stations can each include a photoreceptor supplying the materials to the intermediate transfer surface, and a boosted developer roll supplying the materials to the photoreceptor. The boosted developer roll comprises an outer roll rotating in a first rotational direction to move with movement of the photoreceptor, and a magnetic roll within the outer roll rotating in a second rotational direction opposite the first rotational direction. The magnetic roll comprises alternating permanent magnets. The intermediate transfer surface transfers a layer of the materials to a platen each time the platen contacts the intermediate transfer surface to successively form a freestanding stack of layers on the platen. A bonding station is positioned to apply light and/or heat to the freestanding stack to bond the layers to one another.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.