Patent ID: 6934493

Claim:
A toner-supplementing device in which a toner-storing segment is placed outside an image-forming range of an image-forming device, toner is transferred from the toner-storing segment to a toner-supplementing segment of a developer device and the toner is supplemented to a toner-supplementing area having a predetermined width at the toner-supplementing segment, wherein there are provided: a conduit having an upstream side one end fixed to the developer device; a cylindrical member closely contacted with the other end of the conduit, rotatable around its axis, and having a desired number of small slit-like toner-supplementing ports which have their center being placed on an inclined line in respect to an axial direction in a developed plane of a circumferential wall and are punched with their phase being displaced in a circumferential direction and in parallel with the axial direction; and a toner-transferring member for transferring toner from the upstream one end toward the other downstream end inside the toner-supplementing cylindrical member.