Toner replenishing method and unit in image forming apparatus

摘要

This invention relates to a toner replenishing method including the steps of conveying, from a toner storing section (24) which forms a fluid mixture of toner and air, the fluid mixture to a toner separating section (60) provided away from the toner storing section through toner supplying fluid conveying means, separating the toner from air in the toner separating section, and supplying the toner from the toner separating section to a developing unit, and a toner replenishing unit which practices the toner replenishing method. The toner replenishing method of the invention further includes the step of returning part of air separated from the toner from the toner separating section (60) to the toner storing section (24) by using a returning fluid conveying mechanism (42). The toner replenishing unit of the present invention includes a returning fluid conveying mechanism between the toner storing section and the toner separating section. A path through which the fluid mixture meanders in the toner separating section is formed in the toner separating section.