Patent ID: 6999704

Claim:
A development apparatus in an image forming apparatus, the development apparatus comprising an agitation/transfer means for supplying a developer while agitating the same to a developing roller for developing a latent image formed on a photo conductor, a toner accommodating means having a toner supply opening being provided detachable from a developing apparatus body proper above said agitation/transfer means provided in the developing apparatus body proper, a toner receiving opening being formed in the developing apparatus body proper above the agitation/transfer means for receiving the toner from said toner accommodating means, wherein a guide member is provided surrounding said toner receiving opening of the developing apparatus body proper for guiding toner from the toner accommodating means to the agitation/transfer means and preventing a piling up of toner between the agitation/transfer means and inner wall of development apparatus body proper, and wherein a cross sectional area of toner guide passage of said toner guide member is increased from said toner receiving opening in a direction towards the agitation/transfer means.