JPH10202854A - Ink jet printer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable early drying of ink from a printing surface or discharge thereof without hindrance even when a lost jet of an ink droplet occurs, by a construction wherein an angle of inclination lowering toward the downstream side in the direction of paper feeding is given to the printing surface opposite to a recording head and a groove for ink discharge is provided in continuity in the lower end part of the printing surface. SOLUTION: A paper guiding plate 11 is provided on the downstream side of a paper feeding roller couple 2. A printing surface 12 given an angle of inclination lowering toward the downstream side in the direction of paper feeding is formed in a part of the paper guiding plate 11 being opposite to a recording head 4. On this downstream side, moreover, a groove 13 for ink discharge provided for discharging ink flowing down from the printing surface 12 and having a U-shaped section is formed integrally so that it functions also as a recess holding a delivery roller 5. This groove 13 for ink discharge communicates with a discharged ink tank. In the case when recording paper S is not fed into a record writing part due to occurrence of jamming on the feeding side or a fault of paper feeding, a lost-jet ink droplet is discharged directly onto the printing surface 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ink jet printer, and more particularly, to an ink jet printer having a paper guide plate provided in a paper transport path.

[0002]

2. Description of the Related Art In general, a printer synchronizes an operation of feeding recording paper into a recording / writing section with a recording / writing operation.
If a paper jam occurs on the paper feed side or a paper feed failure occurs, the ink droplets that have been hit will smear the printing surface, and the ejected ink will flow down to the drive rollers and power supply side, and the paper feed function will function. Problems such as loss of security and security.

In order to solve such a problem, there has been proposed an ink absorbing material attached to a printing surface so as to prevent ink from dripping to other portions. In addition, there is a disadvantage that the back surface of the recording paper is contaminated by the ink contained in the absorbing material.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of such a problem.
It is an object of the present invention to provide a new ink jet printer which can dry ink droplets from a printing surface at an early stage and discharge them without any trouble even if they occur.

[0005]

That is, the present invention is directed to an ink jet printer for accomplishing such a task, which is an ink jet printer of a type which performs recording and writing with ink droplets on recording paper fed to a recording and writing section. In addition, a printing surface facing the recording head is provided with an inclination angle that becomes lower toward the lower side in the paper conveyance direction, and a groove for discharging ink is continuously provided at a lower end portion of the printing surface.

[0006]

Embodiments of the present invention will be described below. FIG. 1 shows an embodiment of the present invention.
In the figure, reference numeral 1 denotes a printer main body.
Indicates that the recording paper S from a paper feed tray (not shown) is sent to the recording / writing unit by the paper feed roller pairs 2 and 2, and recording / writing is performed by the recording head 4 mounted on the carriage 3, and then the recording paper S is moved downward in the paper conveyance direction. The first and second paper discharge rollers 5 and 6 are arranged to discharge the paper to a stacker (not shown).

In the drawing, reference numeral 11 denotes a paper guide plate provided on the lower side of the pair of paper feed rollers 2 and 2, and a portion of the paper guide plate 11 facing the recording head 4 has a paper transport direction. A printing surface 12 having an inclined angle that becomes lower toward the lower side is formed, and further formed on the lower side is a groove 13 for discharging ink having a U-shaped cross section for discharging ink flowing down from the printing surface 12. Are integrally formed so as to also serve as a concave portion for accommodating the paper discharge roller 5, and the ink discharge groove 13 communicates with a discharge ink tank (not shown).

In the embodiment configured as described above, if the recording paper S is not fed into the recording / writing unit due to a paper jam or a paper feeding failure occurring on the paper feeding side, an empty The ejected ink droplets are directly discharged onto the printing surface 12.

However, as described above, the printing surface 12
The ink droplets discharged here flow down along the slope into the ink discharge groove 13 and are discharged to the discharge ink tank from here. In addition, the ink adhering to the printing surface 12 dries immediately, and even if the recording paper comes into contact with this portion, it is possible to prevent a situation in which the ink is contaminated by the remaining amount of ink.

[0010]

As described above, according to the present invention, the printing surface facing the recording head is provided with a downward slope toward the lower side in the paper transport direction, and the lower end of the printing surface is used for discharging ink. Since grooves are provided in a row, even if ink drops are ejected due to unstable paper feeding, ink ejected on the print surface immediately flows down to the discharge groove, speeding up drying of the print surface and contaminating the recording paper. Can be prevented beforehand.

Moreover, since the inside of the ink discharge groove is used as a space for disposing the paper discharge roller, the printer can be made compact despite the provision of the ink discharge groove.

[Brief description of the drawings]

FIG. 1 is a side view of an ink jet printer according to an embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 4 recording head 5 discharge roller 11 paper guide plate 12 printing surface 13 groove for ink discharge S recording paper

Claims (2)

[Claims] 1. A recording paper fed to a recording writing unit,
An ink jet printer of the type in which recording and writing is performed by ink droplets, and a printing surface facing a recording head is provided with a lower inclination angle toward a lower side in a paper conveying direction, and an ink discharge is provided at a lower end portion of the printing surface. An ink jet printer characterized by having a series of grooves. 2. An ink jet printer according to claim 1, wherein said ink discharge groove is formed as a space in which a paper discharge roller is provided.