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IP.com Disclosure Number: IPCOM000024173D
Original Publication Date: 1979-Dec-31
Included in the Prior Art Database: 2004-Apr-02

Publishing Venue

Xerox Disclosure Journal


In an electrophotographic printing machine, the quantity of toner particles initially disposed therein is frequently depleted. To maintain the concentration of toner particles at the desired level, additional toner particles are periodically loaded into the printing machine. The loading of toner into an electrophotographic printing machine generally represents a significant problem. This process is messy, and if the toner is shipped in a regular bottle, access to the toner sump must be provided at the top of the developer housing to permit the toner to be poured into the sump. If access is from the bottom, a toner cartridge must be used. Alternatively, the cartridge may be inserted into the machine from the side and the toner extracted therefrom. The present disclosure is directed to a method of loading toner into a developer housing from the side. As shown in Figure I, flange 2 couples outer shell or cylindrical paper tube 1 with the toner sump. A seal in the stationary part of the coupling prevents toner leakage. The rear of tube 1 has a cover formed from paper or plastic which may be removed when coupling 2 is engaged. A polyethylene bag 3 is filled with toner and placed inside the tube 4 and then rolled back over tube 4. Piston 5 is made from either paper or molded plastic. Elongated tube 6 is shipped in the package and serves as a piston rod. In loading the toner, rod 6 is pushed inwardly while the rolled end of bag 3 is pulled outwardly. This action forces the toner out of bag 3 into the sump while the dirty inside surface of the bag remains between tubes 1 and 4. A mark on rod 6 indicates when all of the toner has been removed from bag 3. The sump is then closed and the container de-coupled therefrom.