Patent ID: 8180261

Claim:
An image forming apparatus, comprising: a plurality of developing devices each for developing a latent image formed on an image carrier with a two-ingredient type developer including toner of a particular color and carrier; a plurality of toner storing portions configured to store the toner of a particular color; a single carrier storing portion configured to store the carrier and constructed independently of the plurality of toner storing portions; a plurality of conveying paths each for conveying the carrier of the single carrier storing portion to an associated one of the plurality of developing devices; a plurality of carrier passages each for distributing the carrier of the single carrier storing portion to an associated one of the plurality of conveying paths; and an air feeding device for feeding air to the conveying paths, wherein each of the toner storing portions are positioned upstream of a portion of an associated one of the conveying paths where the carrier enters into the conveying path and downstream of the air feeding device, and the toner which enters into the conveying paths are mixed with the carrier from the carrier storing portion so as to replenish the developing devices.