Toner cartridge with hopper exit agitator

G - Physics – 03 – G

Patent

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G03G 15/08 (2006.01) G03G 21/18 (2006.01)

Patent

CA 2225307

A toner cartridge (1) has a cylindrical toner hopper (61) with a rear wall (61a) defining an output opening well above the lower part of the hopper. A paddle (63) is rotated in the hopper. The exit surface (61aaa) declines downward to form a chamber for the toner adder roller (45) and developer roller (43). This configuration discourages toner from returning to the hopper after it has been electrically charged. To improve movement of toner past the opening an agitator bar (65) extends across the cartridge near the exit surface. The bar is pivoted at both ends and has a portion (65a) which extends into the path of the paddle. As the paddle rotates, it moves the agitator upward until the curved paths of the two members reach separation, at which time the bar drops by gravity. The bar jars toner loose and eliminates jams of toner. The flat surface of the bar, when it has been moved up, partially blocks the exit opening, which desirably limits toner flow.

Cartouche de toner (1) comportant une trémie cylindrique de toner (61) avec paroi arrière (61a) définissant un orifice de sortie bien au-dessus de la partie inférieure de la trémie. Une palette (63) tourne dans la trémie. La surface de sortie (61aaa) est inclinée vers le bas pour former une chambre pour le rouleau d'addition de toner (45) et pour le rouleau de révélateur (43). Cette configuration prévient le retour du toner à la trémie après qu'il ait été chargé électriquement. Pour améliorer le mouvement du toner passé l'ouverture, une barre agitatrice (65) se prolonge à travers la cartouche près de la surface de sortie. La barre est pivotée aux deux extrémités et comporte une partie (65a) qui se prolonge dans la trajectoire de la palette. La palette, en tournant, déplace l'agitateur vers le haut, jusqu'à ce que les parcours courbés des deux éléments se séparent, et la barre descend alors par gravité. La barre agite le toner pour le désagglutiner et elle élimine les blocages de toner. La surface plate de la barre, une fois cette dernière relevée, bloque partiellement l'orifice de sortie, ce qui limite favorablement l'écoulement du toner.

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