JPH08207481A - Ball for ball-point pen and manufacture thereof - Google Patents

Abstract

PURPOSE: To lead ink by grooves to uniformly flow down, to smoothly write fine characters without getting patchy, and to obtain good writing touch by forming the fine grooves on the surface of a ball for a ball-point pen. CONSTITUTION: On the entire surface of a ceramic ball 1 for a ball-point pen are formed mesh-shaped or lattice-shaped fine grooves 2. During writing, irrespective of the position of the ball 1 on a receiver in the lower part of the ball-point pen, ink in an ink container is led by fine grooves 2 to uniformly flow down so that fine characters can be written smoothly without getting patchy. The grooves are formed by a method in which a flexible sheet on which a circular or polygonal protective material is printed in a hound's-tooth shape is pressed on the ball to transfer the protective material, and the ball with the protective material transferred is subjected to corrosion processing or fine abrasive powder spray processing.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ball for a ballpoint pen and a method for manufacturing the same.

[0002]

2. Description of the Related Art Balls for ballpoint pens are generally spherical and made of metal having a smooth surface.

[0003]

According to this conventional ball, since the surface of the ball is a metallic spherical body having a smooth surface, the outflow of ink is uniform due to the positional relationship between the ball and the ball receiver connected to the writing core shaft. It is difficult to do so, and sometimes there is ink dripping and it is difficult to write fine and clean letters.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems and to provide a ball for a ball-point pen in which fine characters can be written smoothly and ink can be easily ejected, and a method for manufacturing the ball.

[0005]

The present invention is characterized in that fine grooves are formed on the surface thereof in order to achieve the above object.

[0006]

In the ball for a ball-point pen according to the first aspect of the invention, since the fine groove is formed on the surface of the ball, ink is guided into the groove and flows down, so that fine characters can be written smoothly without fading.

In the ball-point pen ball according to claim 2,
By forming the mesh-like or lattice-like grooves on the surface of the ball, the ink can be stably flowed down.

A ball-point pen ball according to claim 3,
Since the balls are made of ceramic, wear resistance can be improved.

In the method for manufacturing a ball for a ballpoint pen according to a fourth aspect of the present invention, fine grooves can be formed by corrosion or spraying by transferring the protective material in a staggered manner on the ball.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a ball for a ballpoint pen of the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 1 denotes a ceramic ball, and a net-like fine groove 2 is formed on the entire surface of the ball 1.

In FIG. 2, fine lattice-shaped grooves 2 are formed on the entire surface of the ball 1.

Thus, when the ball 1 is written by the ball-point pen accommodated on the ball receiver connected to the writing core shaft at the lower end of the cylindrical ink container of the ball-point pen, the ball 1 is located at any position on the ball receiver. Even in this case, the ink in the ink container is guided to the mesh-shaped or grid-shaped fine grooves 2 formed on the surface of the ball 1 and flows down uniformly, and fine characters can be written smoothly without being blurred.

Next, an example of a method of forming the groove 2 will be described with reference to FIGS.

FIG. 3 shows a protective material 4 printed in a staggered pattern on a flexible sheet 3.

In FIG. 4, reference numeral 5 denotes a holding mold having a recess for holding the ball 1, and reference numeral 6 denotes the protective sheet 4 on which the flexible sheet 3 printed with the protective material 4 is pressed. 1 shows a pressure-bonding material made of a rubber material or the like for transferring to the surface of 1.

Thus, when the flexible sheet 3 is pressure-bonded with the pressure-bonding material 6, the protective material 4 is transferred to the upper hemisphere of the ball 1.
Although not shown after the protective material 4 transferred to the ball 1 is fixed by drying or the like, a holding die having a small hole for sucking air for adsorbing the ball 1 is provided on the holding die 5 (not shown). To the holding die 5 by holding the ball 1 on the holding die 5.
Move to ´.

The protective material 4 is transferred to the remaining hemispherical surface of the ball 1 which has been transferred to the holding mold 5 ', to which the protective material 4 has not yet been transferred. Fix on 1.

The groove 1 is formed by etching the ball 1 having the protective material 4 transferred to the entire surface or by spraying a fine abrasive.

The grid-shaped groove balls shown in FIG. 2 are formed by pressing a die having grid-shaped projections on the ball before sintering,
It may be manufactured by forming the grid-like grooves and then sintering the balls.

[0021]

According to the present invention as described above, since fine grooves are formed on the surface of a ball for a ballpoint pen, ink is guided by the grooves and flows down uniformly, and thus fine characters are smooth without blurring. It has the effect of being able to write on, and has a pleasant writing feel. Moreover, since it is made of ceramic, it has excellent effects of abrasion resistance and corrosion resistance.

[Brief description of drawings]

FIG. 1 is a perspective view of an embodiment of the present invention.

FIG. 2 is a perspective view of another embodiment of the present invention.

FIG. 3 is a plan view of a flexible sheet for forming fine grooves.

FIG. 4 is a cross-sectional view showing a method for forming fine grooves.

[Explanation of symbols]

 1 ball 2 groove 3 sheet 4 protective material 5 holding type 6 crimping material

Claims (4)

[Claims] 1. A ball for a ballpoint pen, wherein a fine groove is formed on the surface. 2. The ball for a ballpoint pen according to claim 1, wherein the fine grooves are formed in a mesh shape or a grid shape. 3. The ball for a ballpoint pen according to claim 1, wherein the ball is made of ceramic. 4. A flexible sheet in which a circular or polygonal protective material is printed in a zigzag pattern is pressed onto the ball to transfer the protective material, and the ball to which the protective material is transferred is corroded or A method for producing a ball-point pen ball, comprising forming fine grooves on the ball by spraying a fine abrasive.