Abstract: Provided is an apparatus for feeding/discharging a filament for a 3D printer, including a filament supply part which winds the wire-shaped filament and supplies the wound filament; a filament output part which outputs a three-dimensional printed matter by melting and discharging the filament supplied from the filament supply part; and a driving part which supplies the filament from the filament supply part to the filament output part, and discharges the filament from the filament output part toward the filament supply part, wherein the driving part includes a driving motor which is provided at the filament output part to generate a driving force and thus to adapt the filament to be conveyed in a normal direction or a reverse direction; a driving roller which is provided at the filament output part to receive the driving force of the driving motor and to convey the filament in the normal direction or the reverse direction; a conveying roller which is provided at the filament supply part to receive the driving

Abstract: Provided is a toner recycling device for an image forming apparatus, including a waste toner conveying screw which conveys waste toner collected out of a surface of a photosensitive drum to one side; a toner recycling means which is connected with the waste toner conveying screw to be rotated by rotation of waste toner conveying screw, filters a foreign substance out of the waste toner conveyed by the waste toner conveying screw, supplies the recycled toner from which the foreign substance is removed toward a developing unit, and discharges the foreign substance filtered out of the waste toner to an outside of a drum unit; and a collecting case which is integrally formed with the drum unit at one side of the drum unit to collect the foreign substance filtered by the toner recycling means, wherein the foreign substance like paper dust contained in the waste toner is filtered, and then the recycled toner is supplied again toward the developing unit, thus it is possible to prevent the quality of a printed image

Abstract: Provided is a toner recycling device for an image forming apparatus, including a waste toner conveying screw which conveys waste toner collected out of a surface of a photosensitive drum to one side; a toner recycling means which is connected with the waste toner conveying screw to be rotated by rotation of waste toner conveying screw, filters a foreign substance out of the waste toner conveyed by the waste toner conveying screw, supplies the recycled toner from which the foreign substance is removed toward a developing unit, and discharges the foreign substance filtered out of the waste toner to an outside of a drum unit; and a collecting case which is integrally formed with the drum unit at one side of the drum unit to collect the foreign substance filtered by the toner recycling means, wherein the foreign substance like paper dust contained in the waste toner is filtered, and then the recycled toner is supplied again toward the developing unit, thus it is possible to prevent the quality of a printed image

Abstract: Provided is an apparatus for feeding/discharging a filament for a 3D printer, including a filament supply part which winds the wire-shaped filament and supplies the wound filament; a filament output part which outputs a three-dimensional printed matter by melting and discharging the filament supplied from the filament supply part; and a driving part which supplies the filament from the filament supply part to the filament output part, and discharges the filament from the filament output part toward the filament supply part, wherein the driving part includes a driving motor which is provided at the filament output part to generate a driving force and thus to adapt the filament to be conveyed in a normal direction or a reverse direction; a driving roller which is provided at the filament output part to receive the driving force of the driving motor and to convey the filament in the normal direction or the reverse direction; a conveying roller which is provided at the filament supply part to receive the driving