Developer material coating apparatus having developer material removing unit
US5115760A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 29, 1990 |
| Grant date | May 26, 1992 |
| Priority date | — |
| Expiry date | Mar 29, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B2227/325
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A developer material coating apparatus includes a support member feeding unit for feeding the support member to a developer material coating region while carrying the support member thereon, a developer material coating unit for triboelectrically charging the developer material and electrostatically supplying the charged developer material toward the support member feeding unit to coat the developer material on the surface of the support member in the developer material coating region, and a developer material removing unit for sucking and removing the developer material attached to said support member feeding means, except for the developer material attached to the surface of the support member. The developer material removing unit comprises an air nozzle for sucking the developer material attached to the support member feeding unit under a negative pressure, a trap case intercommunicating with the air nozzle for withdrawing the sucked developer material through the air nozzle, an air filter provided in the trap case for trapping the sucked developer material and a negative pressure producing unit intercommunicating with the trap case for producing a negative pressure in said air …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.