JP2002337500A - Coater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve a ballpoint pen type coater without necessity of agitating the ink, which enable correction by mainly concealing a clerical error or the like with a white ink. SOLUTION: The coater comprises a tip of a ballpoint pen provided at a distal end and an ink containing tube provided at a rear, containing the ink heaving shear-rate thinning properties and having a follower which is provided at its rear end and follows to consumption of the ink in such a manner that a spring pressure is imparted to a distal end ball so as to be closely contacted with an inner edge of a ball holding part at the distal end of the tip. The coater further comprises a groove axially provided at a required position of a front end of a barrel provided integrally with the tip in an inner hole of the tip, a valve chamber formed at a substantially central part of the rear of the groove, a tapered or spherical valve element receiving seat formed at the rear end of the chamber and a guide hole formed at the center of the seat to communicate with the rear, and a spring provided between the ball and the barrel in a state in which the valve is longitudinally movably inserted into the chamber and a back surface of the ball is pressed at the front of the chamber.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a ballpoint pen type applicator which can correct errors and the like mainly by concealing them with white ink.

[0002]

2. Description of the Related Art Conventionally, there has been known a liquid applicator using a white pigment in order to correct a mistake or the like. In addition, since the white pigment and the solvent are easily separated from each other, this type of liquid applicator has an ink, a ball, and the like sealed in a flexible container, and it is necessary to shake and agitate the liquid applicator before use. Further, the ink is ejected by pressing the side surface of the container. However, when the remaining amount of the ink becomes small, even if the side wall of the container is strongly pushed, the ink is not ejected. Further, the ink is easily solidified, and the tip of the application is sealed with a cap so as not to dry.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a ballpoint pen type applicator mainly for correcting errors such as erroneous writing, which does not require agitation and does not bother pressing the side of the container.

[0004]

The present invention has the following arrangement to achieve the above object. According to a first aspect of the present invention, there is provided an applicator including a tip of a ballpoint pen at an end thereof and an ink storage tube at a rear portion of the ink storage tube. A follower is provided, and a spring pressure is applied to the back surface of the tip ball so that the tip ball is in close contact with the inner edge of the ball holding portion at the tip of the tip. A groove is provided in the axial direction at a required position at the front end portion of the shaft portion provided integrally with the chip, a valve chamber is formed at a substantially central portion behind the groove portion, and a tapered or spherical shape is formed at the rear end of the valve chamber. The valve body receiving seat and the center thereof are formed with a guide hole communicating rearward, and a spherical valve body is inserted into the valve chamber so as to be able to move back and forth, and the back of the tip ball is pressed forward of the valve chamber. Between the ball and the shaft. Wherein the ring is provided.

[0005]

1 and 2 show an embodiment of the present invention. First, as shown in FIG. 1, a white pigment ink 8 is filled in an ink container 4 of an applicator 1 and the ink is filled with the white pigment ink. The rear end is filled with a grease-like or gel-like follower 9 that follows the ink as the ink is consumed. The follower 9 is not compatible with the ink and has a function of preventing the evaporation of the ink. In addition, a resin follower rod 10 having a specific gravity substantially equal to that of the follower is immersed in the follower as needed. The follower may be a follower such as a silicone rubber.

The white pigment ink 8 contains at least a white pigment such as titanium oxide and hollow polymer fine particles and a gelling agent, and is formulated so as to prevent sedimentation of the pigment and to minimize the loss of fluidity. It is a white pigment ink. In addition, since the ink has a shear thinning property, the viscosity can be reduced by the rotation of the tip ball, so that a coating having a high concealing property can be performed.

[0007] In the applicator 1, a shaft 5 is integrally formed in front of the ink storage tube 4, and a valve chamber 5d is formed at a substantially central portion of an inner hole of the shaft 5. In the valve chamber, a tapered or spherical valve element receiving seat 5e is formed at the rear end, and a guide hole 5f communicating with the rear ink storing portion is formed at the center thereof, and a ridge 5g is formed at a required position at the front end. ing. In the front part 5a of the shaft part 5, a groove part 5b is provided at a required position in the axial direction from the front end to slightly behind the ridge 5g.

[0008] The spherical valve element 6 is inserted into the valve chamber 5d by elastically deforming the protruding ridge portion 5g.
Is loosely fitted into the valve chamber in a state where it cannot be pulled out. Note that the valve body may not be spherical, such as an axis having a tapered surface. The groove 5b is for easily elastically deforming the protruding ridge 5g, but can be elastically deformed even if the shaft is not a resin molded product.

A spring 7 is provided in a state in which the rear end is in contact with the front end of the ridge 5g, and the shaft 5 is inserted into the tip 2 while the back surface of the tip ball 3 is pressed by the front end of the spring 7. It is fixed to the hole. The fixation between the shaft 5 and the chip 2 can be achieved by press-fitting, bonding, or providing a locking means between them. As described above, the ball holding portion 2a of the chip 2
The tip ball 3 is in liquid-tight contact with the inner edge of. Also, the back surface of the tip ball 3 abuts against the ball seat portion 5c at the front end of the shaft portion 5 by appropriately retreating the tip ball 3 during the coating operation.
Further retreat can be prevented.

By the way, the tip ball 3 is the ball holding portion 2
Close contact with the inner surface of a is very important for drying the writing tip and preventing direct current of the ink even if the ink has a high viscosity. Therefore, especially in the case of a metal chip, the surface roughness of the inner surface of the chip holding the tip ball 3, the inner surface is ground to improve the close contact accuracy by caulking, and the secondary plastic working is performed to increase the caulking accuracy. Be considered. Also, if necessary, a surface treatment or the like may be considered on the surface in close contact with the tip ball.
In addition, the ballpoint pen type applicator for erroneous writing correction as in the present application,
In order to increase the amount of ink discharged and to eliminate clogging, the retraction dimension of the tip ball is set to be larger than that of a ballpoint pen for writing.

[0011]

Next, the operation of the embodiment will be described below. In a state in which the tip ball 3 is not pressed for application, the tip ball 3 is brought into liquid-tight contact with the inner edge of the ball holding portion 2a of the chip by the pressure of the spring 7, so that the backflow of ink is prevented. When the tip 2 is upward, the valve 6
Closely contacts the valve body receiving seat 5e and seals the conducting hole 5f.
Even if the ink is applied upward and the ink on the back surface of the tip ball 3 of the chip runs out, the ink is caught by the head and does not flow backward. Therefore, when the chip 2 is turned downward, the ink can immediately flow out. Incidentally, in a structure having no valve element, the ink flows backward when applied upward.

The follower rod 10 is used when the ink container has a large diameter. In other words, the grease-like or gel-like follower 9 has a problem that when the ink container tube has a large diameter, the ink container tube is easily deformed and broken by the influence of impact or the like.
The rigidity can be increased by immersing a resin follower rod having a specific gravity substantially equal to that of the follower in the follower. The follower rod is effective when the ink storage tube has a large diameter and tends to flow backward, or when repeated upward application or impact is applied. The applicator is not necessarily needed because it is rarely used upward.

[0013]

As described above, the present invention provides a white pigment using an ink containing a white pigment and a gelling agent so as to prevent sedimentation of the pigment and not to impair the fluidity. There is no problem that the ink and the solvent are separated from each other, so that it is possible to provide an easy-to-use ballpoint pen type applicator for correcting erroneous writing which does not need to stir the ink with a simple structure and at low cost.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a ballpoint pen type applicator according to an embodiment, showing a state in which a chip is directed upward.

FIG. 2 is a longitudinal sectional view of a ballpoint pen type applicator according to an embodiment, showing a state where a chip is directed downward.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Applicator 2 Tip 2a Ball holding part 3 Tip ball 4 Ink storage tube 5 Shaft part 5a Front part 5b Groove part 5c Ball seat part 5d Valve chamber 5e Valve body receiving seat 5f Guide hole 5g Ridge 6 Valve body 7 Spring 8 Ink 9 Follower 10 Follower stick

Claims (1)

[Claims] 1. A tip of a ball-point pen and an ink storage tube at the rear thereof are provided at an end thereof, and the ink storage tube is provided with an ink having shear thinning viscosity and a follower provided at a rear end of the ink to follow the ink as the ink is consumed. An applicator in which a spring pressure is applied to the back surface of the tip ball so that the tip ball comes into close contact with the inner edge of the ball holding portion at the tip of the tip. A groove is provided in a required position at the front end of the integrally formed shaft, and a valve chamber is formed at a substantially central portion behind the groove, and a tapered or spherical valve body is formed at the rear end of the valve chamber. A guide hole communicating with the receiving seat and the center thereof is formed at the center, and a spherical valve body is inserted into the valve chamber so as to be able to move back and forth, and in front of the valve chamber, the back surface of the tip ball is pressed. Spring between tip ball and shaft Applicator, characterized in that eclipse the.