| 摘要 |
<p>This invention is generally directed to an apparatus for charging toner particles comprised in operative relationship of a means for charging insulating toner particles (12) and a means for transporting (1) insulating toner particles, said means for charging (12) and said means for transporting (1) being charged to a predetermined potential, which apparatus further includes therein a brush device (21) for delivering toner particles to a charging nip (11) situated between the means for charging the toner particles (12) and the means for transporting the toner particles (1). The brush device (21) can also function as a charging source for the toner particles, and as a cleaning system. More specifically in one embodiment the present invention is directed to an apparatus for simultaneously metering, charging and transporting non-magnetic insulating toner particles comprising in operative relationship a metering roll means (12), an optional trim blade means (27) for said metering roll means, a toner supply reservoir means (25) containing therein weakly charged insulating toner particles possessing about an equal number of positive and negative charges thereon, a transporting hard roll (1) or donor belt means (2), a triboelectrically active coating contained on said transporting means, a drive roll means (4), an idler means (10), a tensioning means (14), an imaging means, a voltage source means (15) for the metering roll means, a voltage source means (6) for the drive roll means (4), and the transportingmeans, said metering roll means (12) moving in a direction opposite to the direction of movement of the transporting means (1) and wherein the apparatus further includes a moving brush means (21) contained in the toner supply reservoir (25) which brush means contains bristles (23) thereon, wherein the brush (21) transports toner particles to a charging nip (11) situated between the metering roll means (12) and the transporting means (1).</p> |
