JPS6228298A - Pen point made of synthetic resin - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] (Industrial application field) This invention relates to a pen nib made of synthetic resin.

(Prior Art) In order to reinforce a synthetic resin pen nib, the use of metal or different types of synthetic resin as a reinforcing body is disclosed in, for example, Japanese Patent Laid-Open No. 47-41930. By the way,
The scope of claims in this publication is ``A wear-resistant pipe of extremely thin diameter made of extremely thin rods made of metal or hard synthetic resin, with or without slits for capillary action.'' A pen nib, which is press-fitted into the rod and forms a gap between the outer surface of the rod and the inner surface of the pipe to create a capillary action. ”.

(Problem that the invention attempts to solve) The conditions required for the reinforcement are as follows.

O To maintain the smooth writing feel characteristic of synthetic resin.

When 0 pen pressure is applied, there is no deflection.

Make it difficult to break.

O Improving wear resistance.

0 Good ink wettability to stabilize handwriting.

O Easily molded into one piece with the part to be reinforced.

However, until now, no reinforcing body has been known that satisfies all of these requirements at the same time. For example, if metal is used as a reinforcing material, the writing quality unique to synthetic resin will be impaired. In addition, it is also possible to use other types of synthetic resins as reinforcing materials for commonly used materials such as polyacetal and polyamide. What you can do is limited.

In other words, conventional synthetic resin pen nibs with reinforcing bodies have not been adequately reinforced by the reinforcing bodies.

(Means for solving problems) The inventors of the present invention have discovered the following as a result of intensive research.

If polyetheretherketone is used as a reinforcing body, all the conditions mentioned above can be satisfied, and therefore,
The pen nib is made of synthetic resin and has good reinforcement. That is.

The present invention is a synthetic resin pen nib having a reinforcing body,
The gist of the present invention is a synthetic resin pen nib, characterized in that the reinforcing body is made of polyetheretherketone.

(Example) A first example is shown in the attached FIGS. 1 and 2. Pen nib A is
The pen tip body 1 is composed of a pen tip body 1 having a cylindrical shape as a whole, and a reinforcing body 2 which covers the outer wall of the pen tip body 1 and has a tip shaped together with the pen tip body 1. Here, the pen tip body 1 is made of synthetic resin such as polyacetal or polyamide, and the reinforcing body 2 is made of polyether ether ketone. Note that reference numeral 3 is an ink passage.

This example shows an example of a general synthetic resin nib, which has recently become particularly thin in diameter. That is, this is an example of a material in which reinforcement by a reinforcing body is particularly desired.

However, the shape of the pen tip may not be cylindrical.

The reinforcement body also does not have to be present on the outer wall. This example will be explained with reference to a second embodiment shown in FIGS. 5 and 4.

The pen tip B includes a pen tip main body 4 that has a quadrangular prism shape as a whole.

A reinforcing body 5 is embedded in the vicinity of the two narrow surfaces of the pen tip body 4.

Incidentally, reference numeral 6 is an ink passage. The tip of the pen nib B has four tapered surfaces so that the reinforcing bodies 5 are located at both ends.

This is because the pen tip B is intended to be wide enough to obtain a constant handwriting, which is preferable for maintaining handwriting stability over a long period of time.

In this way, the reinforcing body made of polyether ether ketone is used in an appropriate shape and in an appropriate arrangement.

(Effects of the Invention) An example of manufacturing the nib of the first embodiment described above will be explained.

Molten Duracon U10-01 (polyacetal manufactured by Polyplastics ■) was extruded using an extrusion molding machine equipped with a 151 m diameter die at the tip.

The mixture was cooled and solidified while being pulled to obtain a thin wire-like material with a diameter of about 0.5 m. This is the base material of the pen nib body 1, and when the cross section was measured, the overall diameter of the ink passage 6 was about 0.35 mm. Next, molten Pictrex 450G (polyether ether ketone manufactured by Imperial Chemical Industries) was extruded using an extruder equipped with a die having a ring-shaped discharge port with an outer diameter of 0.8 and an inner diameter of α5, and while being pulled. Cooled and solidified.At this time.

A thin polyacetal filament, which is the base material of the pen nib body 1, was placed inside the polyetheretherketone.

Both came into contact with each other during the cooling and solidification of the polyether ether ketone, and the diameter of the finally obtained integrated product was about 0.6 mm. Table 1 shows the evaluation results when this was cut and one end was shaped into a hemispherical shape to be used as a nib.

In addition, the comparative example in Table 2-1 refers to a pen nib whose overall shape and dimensions, including the shape of the ink passage, are the same as that of the nib, but made only of the polyacetal used above. .

Table 1 (Note 1) Values are at a load of 100/- and a writing angle of 60°.

(Note 2) The value is when the pen is set in the holder with the protruding length of the pen tip set to 1, and a load of 1001 is applied to the writing surface, maintaining it vertically to prevent slippage, and applying a load parallel to the writing surface. This indicates the amount by which the tip of the pen tip flexes from its original state when 5CIP is applied.

(Note 3) Values indicate the maximum load required until the pen breaks at a writing angle of 60° when the pen tip is set in a holder with one length of protrusion.

(Note 4) Values are load 100J', writing speed 7cs
This is when moving 500 m on a tray/ngber at a speed of 500 m per second.

(Note 5) Values are load ffi 100, P, writing angle 6
While observing the handwriting written on high-quality paper at 00° writing speed 7 (J/sec) under magnification, the width of the blurred part at the end of the handwriting in the width direction was randomly measured 50 times, and the standard deviation was calculated. It is something.

As can be seen from the above results, the pen nib of the present invention maintains the smooth writing feel characteristic of synthetic resin.

It does not bend easily and does not easily break, so it provides a sense of stability when writing.
Moreover, it has excellent abrasion resistance, and the resulting handwriting is also stable. Furthermore, when the reinforcing body is made of metal, it can be easily manufactured without the troublesome integral molding that is often required.

[Brief explanation of drawings]

Fig. 1 is a vertical sectional view of the main part showing the first embodiment, and Fig. 2 is a longitudinal sectional view of the main part showing the first embodiment.
FIG. 3 is a perspective view of essential parts showing the second embodiment, and FIG. 4 is a sectional view of the H-n line machine in FIG. 3. A, B... Pen nib 1.4... Nib body 2.5... Reinforcement body 6, 6. Mountain... Ink passage.

Claims (1)

[Claims] A synthetic resin pen nib having a reinforcing body, characterized in that the reinforcing body is made of polyether ether ketone.