This design project documents the design of two low cost, easily assembled, easily replaced charging devices useable in the electrophotographic process. The design process begins with the purpose of the chargers and a comparison to previous designs. Manufacturing processes and material selections are covered. Two plastic springs are designed and analyzed using classical equations and finite element analysis. Consideration is given to temperature and time effects on these springs. The major plastic structure (the housing) is analyzed for stress and deflection using finite element analysis with consideration given to thermal and creep effects. Datum selection is discussed. Tolerance analysis is performed on critical component interfaces. The previous charger design and the improved design are then analyzed and compared using the Boothroyd and Dewhurst Design for Assembly software. Snap fit insertion forces are determined using classical equations. Customer interfaces are reviewed and insertion forces quantified. A general approach to assembly system justification is provided. Manual assembly, flexible automation and hard automation are considered. Complete production drawings of all charger components are provided.
Library of Congress Subject Headings
Charge transfer devices (Electronics)--Design and construction; Electrophotography--Equipment and supplies
Department, Program, or Center
Mechanical Engineering (KGCOE)
DeCecca, Michael, "A Low cost charging system for the electrophotographic process" (1990). Thesis. Rochester Institute of Technology. Accessed from
RIT – Main Campus