Paper-discharging system and method in an inkjet printer

A paper-discharging system for discharging paper printed by a printing head to an outside of an inkjet printer, comprising:

• a discharging unit controlling the printed paper to be upwardly and longitudinally bent with respect a feeding direction of the printed paper to be planar by a stiffness of the paper itself until a rear end of the printed paper is completely discharged to the outside, the discharging unit comprises,
• a first roller part discharging the printed paper in the feeding direction after the paper is printed by the printing head,
• an upward-guiding pert guiding the printed paper to be upwardly bent in a first discharging direction at a first given angle with the feeding direction after the printed paper is passed through the first roller part, and
• a second roller part controlling the printed paper to be bent in a widthwise direction at a second given angle with a plane of the printed paper passing through the upward-guiding part while simultaneously discharging the printed paper in a second discharging direction after the printed paper is passed through the upward-guiding part;
• wherein the upward-guiding part comprises at least one inclined plate having an inclined surface which gradually slants to the upstream of the feeding direction, and the inclined surface is inclined at the first given angle within the range of 10° through 60°.

A paper-discharging system for discharging paper printed by a printing head to an outside of an inkjet printer, comprising:

• a discharging unit controlling the printed paper to be upwardly and longitudinally bent with respect a feeding direction of the printed paper to be planar by a stiffness of the paper itself until a rear end of the printed paper is completely discharged to the outside, the discharging unit comprises,
• a first roller part discharging the printed paper in the feeding direction after the paper is printed by the printing head,
• an upward-guiding part guiding the printed paper to be upwardly bent in a first discharging direction at a first given angle with the feeding direction after the printed paper is passed through the first roller part, and
• a second roller part controlling the printed paper to be bent in a widthwise direction at a second given angle with a plane of the printed paper passing through the upward-guiding part while simultaneously discharging the printed paper in a second discharging direction after the printed paper is passed through the upward-guiding part;
• wherein the upward-guiding part includes a plurality of inclined plates each being disposed such that the first given angle of inclined plates disposed at a center portion in the widthwise direction of the printed paper is smaller than that of the inclined plates disposed at a side portion in the widthwise direction of the printed paper.

A paper-discharging system for discharging paper printed by a printing head to an outside of an inkjet printer, comprising:

• a discharging unit controlling the printed paper to be upwardly and longitudinally bent with respect a feeding direction of the printed paper to be planar by a stiffness of the paper itself until a rear end of the printed paper is completely discharged to the outside, the discharging unit comprises,
• a first roller part discharging the printed paper in the feeding direction after the paper is printed by the printing head,
• an upward-guiding part guiding the printed paper to be upwardly bent in a first discharging direction at a first given angle with the feeding direction after the printed paper is passed through the first roller part, and
• a second roller part controlling the printed paper to be bent in a widthwise direction at a second given angle with a plane of the printed paper passing through the upward-guiding part while simultaneously discharging the printed paper in a second discharging direction after the printed paper is passed through the upward-guiding part;
• wherein the second roller part includes two small roller portions each being disposed to be tilted at the second given angle upwardly from the plane of the printed paper discharged through the upward guiding part, and the small roller portions are inclined at the second given angle within the range of 5° through 30°.

A paper-discharging system for discharging paper printed by a printing head to an outside of an inkjet printer, comprising:

• a discharging unit controlling the printed paper to be upwardly and longitudinally bent with respect a feeding direction of the printed paper to be planar by a stiffness of the paper itself until a rear end of the printed paper is completely discharged to the outside, the discharging unit comprises,
• a first roller part discharging the printed paper in the feeding direction after the paper is printed by the printing head,
• an upward-guiding port guiding the printed paper to be upwardly bent in a first discharging direction at a first given angle with the feeding direction after the printed paper is passed through the first roller part, and
• a second roller part controlling the printed paper to be bent in a widthwise direction at a second given angle with a plane of the printed paper passing through the upward-guiding part while simultaneously discharging the printed paper in a second discharging direction after the printed paper is passed through the upward-guiding part;
• wherein the second roller part includes two small roller portions, and each of the small roller portions comprises,
• a shaft disposed in the widthwise direction to have the second given angle with the plane, and
• second paper-discharging rollers disposed in regular intervals on the shaft;
• and
• second supporting rollers disposed respectively over the corresponding second discharging rollers to transmit a rotation force of the second discharging rollers to the printed paper.

An apparatus in an inkjet printer having a printing head printing paper and discharging the printed paper in a discharging tray along a discharging frame, comprising:

• a discharging unit controlling the printed paper to be bent in a lengthwise direction of the printed paper at a first angle with the printed paper and in a widthwise direction of the printed paper at a second angle with the printed paper, the discharging unit including a first roller part feeding the printed paper in a feeding direction, a guiding part guiding the printed paper to be bent in the lengthwise direction having the first angle with the feeding direction, and a second roller part bending the bent printed paper in the widthwise direction having the second angle with the lengthwise direction, the first roller part including a first discharging shaft having a first discharging roller, and a first supporting shaft having a first supporting roller disposed to contact the first discharging roller and feed the printed paper with the first discharging roller, wherein a first line perpendicularly passing through centers of the first discharging shaft and the first supporting shaft forms a third angle with the feeding direction;
• wherein the second roller part comprises,
• a second discharging shaft having a second discharging roller, and
• a second supporting shaft having a second supporting roller disposed to contact the second discharging roller and teed the printed paper with the second discharging roller, wherein a second line perpendicularly passing through centers of the second discharging shaft and the second supporting shaft forms a fourth angle with the feeding direction.