초록 ▼

A developing device of an electrophotographic copier is structured separably into two mutually attachable and internally connected sections. One of these sections is disposed adjacent to the copier\s photoreceptor and contains a developing roller and the other section distal from the photoreceptor i

A developing device of an electrophotographic copier is structured separably into two mutually attachable and internally connected sections. One of these sections is disposed adjacent to the copier\s photoreceptor and contains a developing roller and the other section distal from the photoreceptor is made of a relatively inexpensive synthetic resin material, including a stirrer roller. When the developing agent is spent, the two sections are separated and only the second part with the stirring roller is discarded for replacement. In order that the spent developing agent can be effectively collected, a bar magnet may be inserted into a chamber formed inside the shaft of the stirrer roller to make use of its magnetic force or a scrapper may be provided to scrape off the developing agent remaining attached to the developing roller. In the case of a clam shell type copier with a top part of the main body made openable rotatingly with respect to its base part, the developing device becomes tilted when the copier is opened for its replacement. A device for shaking the tank can effectively cause the developing agent remaining inside to move into the lower section of the device for easy collection.

대표청구항 ▼

In a developing device of an electrophotographic copier, said developing device comprising a developing tank, a developing roller normally disposed adjacent to a photoreceptor and a stirrer roller for stirring developing agent inside said developing tank, the improvement wherein said developing devi

In a developing device of an electrophotographic copier, said developing device comprising a developing tank, a developing roller normally disposed adjacent to a photoreceptor and a stirrer roller for stirring developing agent inside said developing tank, the improvement wherein said developing device includes a first section which contains said developing roller and a second section which contains said stirrer roller, said first and second sections being detachably attached to each other, said stirring roller having a hollow shaft with a chamber formed therethrough and said developing device further comprising a bar magnet which is insertable into said chamber.