Abstract: An image forming apparatus includes an external gear to which a rotating force of a resist gear is transmitted, a ratchet for transmitting a rotating force from the external gear to a paper feed roller or releasing the transmission, and a ratchet arm having a claw engaged with the ratchet to transmit a rotation of the external gear, thereby rotating the paper feed roller, and a claw engaged with a slit provided on a boss of the paper feed roller to turn the paper feed roller toward a rotation start position and removing the claw from the ratchet to stop the paper feed roller, and the boss is provided with an offset bottom peripheral surface to be moved with the claw entering to stop the rotation of the paper feed roller when a resist sensor detects a tip of a recording paper.

Abstract: An image forming apparatus includes an external gear to which a rotating force of a resist gear is transmitted, a ratchet for transmitting a rotating force from the external gear to a paper feed roller or releasing the transmission, and a ratchet arm having a claw engaged with the ratchet to transmit a rotation of the external gear, thereby rotating the paper feed roller, and a claw engaged with a slit provided on a boss of the paper feed roller to turn the paper feed roller toward a rotation start position and removing the claw from the ratchet to stop the paper feed roller, and the boss is provided with an offset bottom peripheral surface to be moved with the claw entering to stop the rotation of the paper feed roller when a resist sensor detects a tip of a recording paper.

Abstract: In an image forming apparatus having a double side printing function, paper on which printing has been completed is prevented from being caught between paper ejection rollers.

Abstract: An image forming apparatus includes a media feed cassette 100 that is detachably attached to the image forming apparatus and contains medias used for printing therein. The media feed cassette 100 includes a chassis 100a; a cassette-side media stacking portion 101 which is mounted to said chassis 100a and contains medias therein, and is located within said image forming apparatus when it is attached to said image forming apparatus; a tray-side media stacking portion 102 being attached to said chassis 100a such that said tray-side media stacking portion is extendable to outside of said image forming apparatus, medias being put in said tray-side media stacking portion when it is extended outside; and a pickup unit 107 for picking up, sheet by sheet, medias put on said tray-side media stacking portion 102.

Abstract: In an image forming apparatus having a double side printing function, paper on which printing has been completed is prevented from being caught between paper ejection rollers.

Abstract: An image forming apparatus includes a media feed cassette 100 that is detachably attached to the image forming apparatus and contains medias used for printing therein. The media feed cassette 100 includes a chassis 100a; a cassette-side media stacking portion 101 which is mounted to said chassis 100a and contains medias therein, and is located within said image forming apparatus when it is attached to said image forming apparatus; a tray-side media stacking portion 102 being attached to said chassis 100a such that said tray-side media stacking portion is extendable to outside of said image forming apparatus, medias being put in said tray-side media stacking portion when it is extended outside; and a pickup unit 107 for picking up, sheet by sheet, medias put on said tray-side media stacking portion 102.