Paper feeding unit driving device for electrophotographic processor

A driving device for an apparatus having a first roller gear and a second roller gear rotating by a positive drive of a main motor, a first roller for conveying sheets to a second roller, said second roller delivering the sheets to a predetermined location, said device comprising:

• a latch for selectively allowing the connection and disconnection of a positive drive to be sent to the second roller in coordination with the first roller in accordance with the orientation of said latch, said latch having a first latch lug formed on one side thereof to restrict the rotational motion of the second roller, a second latch lug formed on another side thereof to follow the rotational motion of the first roller, and a first elastic means for applying a resilient force when the latch is actuated;
• a first shaft provided on one side of the second roller for supplying the drive of the second roller gear to the second roller, a first clutch-spring provided on another side of the second roller gear to control the operation of the first shaft, a first collar provided on one side of said first clutch-spring to connect the second roller gear and a first hub together via said first clutch-spring, a first stop formed on the cylindrical surface of said first collar and engaged with the first latch lug to interrupt the rotational motion of the second roller, and said first hub being provided on one side of the first collar to be fixed to one end of the first shaft;
• a second shaft for supplying the drive of the first roller gear to the first roller, a second clutch-spring for controlling the rotational motion of the second shaft, a second collar provided on one side of the second clutch-spring to connect the first roller gear and a second hub together via said second clutch-spring, a second stop formed on the cylindrical surface of the second collar to interrupt the rotational motion of the first feed roller, said second hub fixed to one end of the second shaft, and a cam formed on one side of the second hub to be engaged with the second latch lug to regulate transmission of the drive to the second roller by controlling said orientation;
• and
• a solenoid controlling transmission of the drive to the first feed roller, said solenoid having a plunger to be engaged with the second stop to interrupt the rotational motion of the first feed roller and a second elastic means for causing the plunger to return to an original unenergized state.

In an electrophotographic processor having a feed roller gear and a convey roller gear rotating by a positive drive of a main motor, a paper feed roller for providing paper stored in a paper cassette to a convey roller, said convey roller delivering the paper to an image-forming unit, a paper feeding unit driving device comprising:

• a latch for selectively allowing the connection and disconnection of a positive drive to be sent to the convey roller in coordination with the paper feed roller in accordance with the orientation of said latch, said latch including first and second restricting means for respectively restricting the rotational motion of the convey roller and following rotation of the paper feed roller, and a first elastic means for applying a resilient force when the latch is actuated;
• a first shaft for supplying the drive of the convey roller gear to the convey roller, a first clutch-spring controlling the operation of the first shaft, a first linking means for connecting the convey roller gear and a first hub together via said first clutch-spring, a first stop formed on said first linking means and engaged with the first restricting means for interrupting the rotational motion of the convey roller, and said first hub being fixed to one end of the first shaft;
• a second shaft for supplying the drive of the feed roller gear to the paper feed roller, a second clutch-spring for controlling the rotational motion of the second shaft, a second linking means for connecting the feed roller gear and a second hub together via said second clutch-spring, a second stop formed on said second linking means for interrupting the rotational motion of the paper feed roller, said second hub being fixed to one end of the second shaft, and a cam engaged with the second restricting means regulating transmission of the drive to the convey roller;
• and
• a solenoid controlling transmission of the drive to the paper feed roller, said solenoid having a plunger to be engaged with second stop to interrupt the rotational motion of the paper feed roller and a second elastic means for causing the plunger to return to an original unenergized state.