Browse Prior Art Database

Original Publication Date: 1984-Apr-30
Included in the Prior Art Database: 2004-Apr-04

Publishing Venue

Xerox Disclosure Journal


Most automatic reproducing machines use a dry toner material. It is required to periodically replenish the supply of toner in the sump or developer housing directly from a bottle. Most toner sumps are part of the developer assembly which have a deep well configuration and also have a top cover which is either removed or hinged open to provide access during the addition of the toner. When toner is added directly to the sump from a bottle, a cloud appears which creates a dirt problem in the machine and surrounding area and causes the odor of the toner to become more apparent to the user. The figure illustrates a device for containing this toner cloud and thereby reducing the dirt and odor problems. In the figure, the toner sump 10 has a top comprised of two pieces of flexible plastic 12a and 12b which in undisturbed condition overlap slightly forming a sump closure while at the rest position. Both pieces of flexible plastic can be secured to the long edges of the toner sump as well as to part of the short edge along each side of the sump. When adding toner through the sump from a toner bottle 16 through a nozzle 14, the nozzle is inserted through the overlapping pieces of flexible plastic which deflect as indicated by the dotted line and the toner is added to the sump merely by taping or shaking the toner bottle. Upon completion of the replenishing operation, the supply bottle is withdrawn from the overlapping flexible plastic strips thereby permitting them to once again serve as the sump top.