JPS5935402Y2 - band printer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a band printer having a type band running horizontally along the printing position.

FIG. 1 shows a printing section of a band printer.

The type band 1, which has type on its outer periphery, is passed around a drive and driven pulley 7.8 driven by a drive motor 9, and runs horizontally along the printing position.

An anvil 2 extends along the printing position inside the band 1.
are provided and face the printing hammers 6 arranged in parallel along the printing position.

Note that 4 and 5 are printing paper and ink ribbon.

The anvil 2 has a structure as shown in FIG. 2, that is, a structure in which a protrusion 3 is provided to support the back side of the printed characters on the band 1.

In the case of such an anvil 2, the paper 4 easily comes into contact with the ink ribbon 5, so the paper 4 gets dirty, and since the lower part of the band 1 is free, the band 1 vibrates due to the impact of the printing hammer 6, and the printing quality deteriorates due to the vibration. There was a problem.

In order to prevent the print quality from deteriorating, it has been proposed to provide a new protrusion to support the lower part of the band 1, as shown in FIG.

In this case, since the vibration of the band 1 is almost eliminated, it is possible to prevent the print quality from deteriorating, but the problem of the paper 4 being stained due to contact between the paper 4 and the ink ribbon 5 cannot be solved.

Further, as shown in FIG. 4, there is an anvil 2 in which the upper and lower portions of the anvil 2 are extended toward the paper 4 to prevent contact between the paper 4 and the ink ribbon 5, thereby preventing the paper 4 from becoming soiled.

However, if the band 1 is formed into a conical or inverted conical shape, the end of the band 1 may be attached to the anvil 2, and the load on the drive motor 9 may become large, making it impossible to rotate. There is a problem in that it is damaged and its lifespan is shortened.

The purpose of the present invention is to eliminate the above-mentioned drawbacks of the prior art and to eliminate paper stains.

In the present invention, protrusions are provided to support the back side of the printed characters on the type band, and protrusions that press the paper against the printing hammer are provided below and extend toward the paper from the running path of the ink ribbon.

The present invention will be explained below with reference to FIG. 5 showing an embodiment.

Among the three protrusions 13a to 13c provided on the anvil 12, the upper protrusion 13a supports the back side of the band 1 substantially on the typeface.

The intermediate protrusion 13b supports the lower part of the band 1, and extends slightly toward the paper 4 side from the protrusion 13a.
The lower part of the band 1 is brought into contact with the anvil 12 more strongly than the upper part of the band 1, so that the band 1 does not vibrate when hit by the printing hammer 6, and deterioration in printing quality is prevented.

The lower protrusion 13c moves the paper 4 from the running path of the ink ribbon 5.
It extends to the side and presses the paper 4 against the printing hammer 6 side.

Therefore, the paper 4 and the inking ribbon 5 are prevented from coming into contact with each other, and the paper 4 is not soiled.

According to this embodiment, even if the band 1 has a conical shape or an inverted conical shape, since the band 1 contacts only the protrusion 13a or 13b, its upper and lower ends are connected to the anvil 1.
No more sticking to 2.

As described above, according to the present invention, since the paper does not come into contact with the ink ribbon except during printing, staining of the paper can be prevented.

Furthermore, since it is now possible to use a conical or inverted conical type band, which could not be used in the past, a secondary effect of reducing the defective rate of the type band is also brought about.

[Brief explanation of the drawing]

Figure 1 is a perspective view showing an example of a band printer, Figures 2-
FIG. 4 is a longitudinal sectional view showing a conventional printer, and FIG. 5 is a longitudinal sectional view showing an embodiment of the printer of the present invention. In the figure, 1 is a type band, 2 and 12 are anvils, and 3
, 13 is a protrusion, 4 is a printing paper, 5 is an ink ribbon, 6 is a printing hammer, 7 is a drive pulley, 8 is a driven pulley, 9 is a drive motor, and 10 is a ribbon separator.

Claims (1)

[Claims for Utility Model Registration] Printing hammers arranged in parallel along the printing position, a printing band having printing characters on its outer periphery and running horizontally along the printing position, and printing via the printing band. The band printer is equipped with an anvil extending along the printing position on the back side of the type band so as to face the hammer, and the anvil is provided with a protrusion that supports the back side of the type on the type band, and the printing paper is attached to the anvil. A band printer is provided with a protrusion at the bottom that extends from the ink ribbon path toward the paper side so as to press against the printing hammer side.