JP2552110C - - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an ink jet recording apparatus using hot melt type ink. (Prior Art) Problems of an ink jet recording apparatus that satisfies requirements such as high-speed printing, low noise, use of plain paper, and the like include easy bleeding of printing and difficulty in drying. As a means for solving this problem, a recording method using a solid ink has been devised, and one example thereof is an ink jet recording method called a hot-melt type as disclosed in JP-A-59-7052. . According to this recording method, a solid ink in a solid state at normal temperature is heated and melted for printing, so that the ejected ink solidifies immediately after printing. Therefore, compared to the conventional water-based ink, there is no bleeding or a long time to dry. (Problems to be Solved by the Invention) The solid ink used in the hot-melt type ink jet recording apparatus referred to herein is, for example, a natural wax disclosed in JP-A-58-108271. Since the printing portion of the recording paper printed using this solid ink is composed of protruding printing dots such as Braille, when a plurality of sheets are overlapped and rubbed, the surface of the printing dots is scraped due to friction, and the printing dots are printed. There is a problem that the back surface of the recording paper to be touched is stained with solid ink. Further, as a result, if the printed recording paper is repeatedly subjected to friction, there is a disadvantage that the printing quality is deteriorated. One of the methods of making the surface of a printed dot difficult to remove is to increase the hardness in the solid state. However, in general, when the hardness of the solid ink is increased, the viscosity at the time of melting is also increased. . SUMMARY OF THE INVENTION It is an object of the present invention to provide an apparatus for processing so that print dots on a recording sheet are not easily removed even when the recording sheet is rubbed. (Means for Solving the Problem) That is, the present invention relates to a hot-melt type ink-jet recording apparatus which heats, melts and prints a solid ink in a solid state at normal temperature as an ink-jet recording apparatus for solving the problem. In the above, a carriage holding a print head that heats and melts the solid ink and discharges the recording ink onto the recording medium is disposed so as to be movable in the recording / writing direction. The roller is provided with a roller that presses the dot-shaped ink that has risen and solidified to flatten the ink. (Operation) With this configuration, the dot-shaped ink solidified while being ejected from the print head and rising on the recording paper is quickly flattened by a roller provided immediately after the carriage, and the recording paper is raised. To achieve good recording and writing. Embodiment An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of a recording apparatus according to an embodiment of the present invention, and
The pressure is applied by the roller 6 to the printing paper P on which the printing is performed. That is, the roller 6 is strongly pressed against the surface of the printing paper P on the platen 3 by the roller support 8 and the spring 7 attached to the rear wall surface of the ink tank 5 in the recording / writing direction. Then, the carriage 1 that moves with the printing
As a result, the roller 6 sequentially applies pressure to the print dots. According to this embodiment, the size and weight of the roller can be reduced, and the time from printing to applying the roller pressure to flatten the printing dot can be greatly reduced. (Effects of the Invention) As described above, according to the present invention, the pressurizing means is provided on the lower side of the hot melt type print head, so that the ink on the dots solidified in a raised state on the recording medium is removed. By flattening and biting into the recording medium, these prints can be prevented from falling off, collapsing, etc., and the printing quality can be kept good, and the inconvenience of soiling the back surface of other paper with this ink is eliminated. In addition, the bulk of the recording medium when stacked can be reduced as much as possible. In addition, since a roller as a pressing means is mounted on the lower side of the carriage in the recording / writing direction, the ink droplets ejected onto the recording medium and solidified are immediately flattened, and the recording medium is lifted up by using this roller. And printing can be performed more favorably.

[Brief description of the drawings]   FIG. 1 is a perspective view of a print head unit showing one embodiment of the present invention. 1 ‥‥ carriage 5 ‥‥ ink tank 4 ‥‥ print head 6 ‥‥ roller

Claims (1)

Claims: In a hot-melt type ink jet recording apparatus for printing by heating and melting solid ink in a solid state at normal temperature, a print head for heating and melting the solid ink and discharging the solid ink onto a recording medium is held. A roller is provided so as to be movable in the recording / writing direction, and a roller for pressing flattened and solidified dot-shaped ink on the recording medium is provided on a lower portion of the carriage in the recording / writing direction. An ink jet recording apparatus, wherein the ink jet recording apparatus is attached.