Conical Helix Developing Device for Developer Flow

The conveyance path is designed with a curved bottom surface instead of sharp right-angle turns. The curved path allows the developer to flow smoothly from the downstream side end back to the upstream side, preventing stagnation and reducing stress concentration that occurs with abrupt directional changes.

The conveyance path utilizes a three-dimensional curved configuration rather than a simple planar loop. By introducing vertical and radial dimensions through the curved bottom surface, the path enables gentle redirection of developer flow, eliminating the need for sharp turns and reducing mechanical stress on the developer particles.

The curved bottom surface of the conveyance path provides a continuous directional guide for the developer. As the conveyance screw rotates and pushes the developer, the curved geometry naturally redirects the flow at the downstream end, ensuring smooth transition back toward the upstream side without sudden stops or dead zones.

The curved bottom surface acts as an intermediary element between the conveyance screw's linear pushing action and the developer's circular motion. This intermediate geometric feature translates the axial pushing force into smooth rotational flow, preventing stagnation at the downstream end.

The curved conveyance path minimizes abrupt changes in flow direction and pressure distribution. By eliminating sharp corners and right-angle turns, the curved geometry reduces stress concentration and prevents developer particle damage, maintaining flowability and ensuring consistent image density throughout the circulation cycle.

The invention converts the potential harm of sharp turns and stress concentration into benefit by using curved geometry. The curved path transforms what would be harmful stress points into smooth flow transitions, actually improving developer circulation efficiency while protecting particle integrity and maintaining reliable image quality.