JPH07149092A - Penpoint of writing utensil - Google Patents

Abstract

PURPOSE:To obtain a penpoint at a low cost suitable for use of writing Arabic script by making it with synthetic resin, and providing a slant directional property at a writing contact part where the right-band end part is situated at the tip-end side rather than in the left-hand end part at the time of placing the writing contact part into contact with the writing surface. CONSTITUTION:A penpoint is made of synthetic resin such as polyacetal or polyetherketone, and formed by obtaining a continuous matter being circular in its cross-section through extrusion molding, and then cutting it into a predetermined length, followed by forming into tapered shape in its end part. Namely, the end part of the penpoint has five surfaces and formed so that the right-hand end part 5 is positioned at the tip end side rather than in the left-hand end part 6 when the writing contact part 4 is put into contact with the writing surface. In addition, the wall thickness (a) of the right-hand end part 5 is made thinner than that (b) of the left-hand end part 6. An ink conduit 2 is opened only at the tip-end surface 3, however, it can be opened partially at the surface 7, and the ink conduit 2 in the cross sectional surface of the penpoint 1 is formed with appropriate patterns.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pen tip of a writing instrument made of synthetic resin.

[0002]

2. Description of the Related Art A long product is obtained by extrusion molding an appropriate synthetic resin such as polyacetal or polyether ether ketone.
A variety of synthetic resin nibs are known as the nib of a writing tool, typically, a pen tip of a writing tool that is cut into a predetermined length and has its end properly shaped. Some have the advantage of providing a supple and smooth writing touch, and some have been designed to have a wide writing abutment that is convenient for writing graphic characters. In addition, as a pen tip having this wide writing contact portion, there is also known a pen tip whose material is devised so that both ends of the writing contact portion come into good contact with the writing surface.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a relatively low cost nib suitable for writing Arabic or Persian characters (hereinafter referred to as "this kind of character"). , As described below.

FIG. 3 is for explaining this kind of character, and shows, for example, the Arabic characters "k" and "s" and their writing order. As can be seen from what is shown in FIG. 3, this kind of character is a gorgeous character that reminds us of the flow pattern of sand in the desert, and it has a wide variety of thickness, and the text is written from right to left. It is written from right to left as a whole.

As a brush is suitable for Japanese calligraphy in terms of so-called "stop, splash, harai", writing of this kind of character is conventionally made by scraping thin bamboo or a reed stalk. What is used is preferred. It has a linear and wide writing contact portion, and writing is maintained with the writing contact portion aligned with the writing surface. It also withstands relatively high writing pressure compared to Japanese writing. By the way, there is also a fountain pen for this kind of character, which has a metal nib with a linear wide writing contact part, but it is much cheaper in price than this. In addition, if you use a fiber bundle that is the most common low-cost pen tip that has a wide writing abutment, the fibers will soon come apart and the letters will come out in terms of writing pressure and writing direction. I cannot write it as it is.

On the other hand, the conventional synthetic resin nib having a wide writing abutting portion has the advantage of having the above-mentioned supple and smooth writing touch, and thus, writing this kind of character with a certain degree of tolerance. Has been accepted by those who do.

However, it has never been satisfactory in maintaining writing with the writing contact portion aligned with the writing surface. The high writing pressure seems to be convenient for the use of elasticity due to the synthetic resin, but on the contrary it also becomes the limit of exerting elasticity, and as mentioned above, in general, it is common in the manufacturing method to combine a plurality of materials. The price will increase. Also, in relation to the writing tool gripping direction, it is desirable that the direction of the wide writing abutting part (the direction connecting the end parts on both sides) is not perpendicular to the pen tip axis direction, and therefore it should be an oblique direction. However, in this case, the above-described supple and smooth writing touch adversely affects the subtlety.

After all, it may be said that it is a matter of familiarity, but it is naturally preferable to provide a pen tip of a writing instrument which is easier to be used than that.

[0009]

DISCLOSURE OF THE INVENTION The present invention is a pen tip made of a synthetic resin, which has a linear wide writing contact portion obliquely to the pen tip axial direction. The direction is
The right end portion is located closer to the tip side than the left end portion when the writing contact portion is in contact with the writing surface, and the thickness of the right end portion of the writing contact portion is the thickness of the left end portion. The point is the pen tip of the writing instrument, which is thinner than the thickness.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An example will be described with reference to the attached FIGS.
As described above, the pen tip 1 is made of polyacetal or polyether.
It is made of an appropriate synthetic resin such as tel-terketone. Nylon and high density polyolefin are also examples. It is obtained by extrusion molding to obtain a long product having a circular cross section, which is cut into a predetermined length, and the ends are shaped as shown in the figure. Although injection molding may be used, extrusion molding can complicate the cross-sectional pattern of the ink passage 2 to easily obtain a desired capillary force, and is generally advantageous in terms of price. Is. The cross-sectional shape of the long product to be obtained may be rectangular or the like.

Due to the molding of the end portion, the nib 1 has five surface portions at the tip portion (two surfaces are not visible on the side facing the drawing). Although all are drawn in a plane, of course, each may have an appropriate curved surface property. Although not shown, the front view (the view as seen from above in the drawing) may not be symmetrical. The tip surface 3 can also be formed to have an appropriate inclination.

However, it is preferable that the side portion serving as the writing contact portion 4 has as high linearity as possible, regardless of so-called "alling (chamfering)". Then, the direction (direction as a straight line) is an oblique direction with respect to the pen tip axis direction, and is rising to the right in the state shown in the figure. That is,
When the writing contact portion 4 is brought into contact with the writing surface, the right end portion (the right end portion in the drawing, which is indicated by reference numeral 5) is more than the left end portion (the left end portion in the drawing, which is indicated by the reference numeral 6). It is located on the tip side (upper side in the drawing). The angle of the writing instrument gripping cannot be determined unconditionally because there are individual differences, but in general, α shown in FIG. 2 is preferably set to around 60 °.

Moreover, as shown in FIG. 1, the thickness a of the right end 5 is smaller than the thickness b of the left end 6. Here, although the thicknesses a and b are shown as the side lengths of the tip end face 3 in the figure, in short, the material elasticity due to the right end 5 being closer to the tip than the left end 6 is In addition to the ease of exerting the elasticity, the right end 5 is given more elasticity than the left end 6 in terms of thickness. Although it depends on the material and the width c of the writing contact portion 4, for example, when c is 2 mm, a is 0.3 mm and b is 0.6 mm.

Although an example has been described above, various modifications can be made without departing from the spirit of the invention. For example, although the ink passage 2 shown in the drawing is opened only on the front end surface 3, it may be partially opened on the surface 7. The pattern of the ink passage 2 in the cross section of the pen tip 1 is also appropriate.

[0015]

As is clear from actual writing, when writing this kind of character, the pen tip of the present invention is most likely to be applied with writing pressure at the left end, and However, it is relatively small, and the writing pressure tends to change. In the pen tip of the present invention, the elasticity at the right end portion is exerted not only in the material surface due to the right end portion being closer to the tip end side than the left end portion, but also in thickness. Since it is easy to write, it is easy to maintain writing with the writing contact portion aligned with the writing surface, which is necessary for writing this kind of character neatly. It is also durable and inexpensive.

[Brief description of drawings]

FIG. 1 is a perspective view of an essential part for explaining an embodiment of the present invention.

FIG. 2 is a side view of the one shown in FIG.

FIG. 3 is a diagram for explaining how to write Arabic characters and the like.

[Explanation of symbols]

 1 Pen tip 2 Ink passage 3 Tip surface 4 Writing contact part 5 Right side edge 6 Left side edge 7

Claims (1)

[Claims] 1. A pen tip made of synthetic resin, which has a linear wide writing contact portion in an oblique direction with respect to the pen tip axis direction, and the diagonal directionality of the writing contact portion is the writing contact portion. When contacting the writing surface, the right end is located closer to the tip side than the left end, and the thickness of the right end of the writing contact part is smaller than that of the left end. The pen tip of the writing instrument is becoming.