JPS6382798A - Manufacture of plate-shaped resin pen point - Google Patents

Abstract

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

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for manufacturing a flat resin pen nib that is capable of writing on both sides.

(Conventional technology and its problems) This is coupled with the fact that fountain pens have become relatively expensive in recent years.

BACKGROUND OF THE INVENTION Nagi writing instruments with a synthetic resin nib have been in the spotlight because of their advantages such as good writing quality and ease of molding. In particular, pens with a flat nib shape have the flexibility of the 2 synthetic resin itself, which makes the sheet layer stand out, so compared to conventional gold, m1
ll! It can provide an extremely soft writing touch not found in fountain pens, and the applicant has already commercialized a writing instrument that takes advantage of this advantage.

In manufacturing this type of nib, a so-called extrusion molding method is used, and in order to obtain the actual nib shape, a grinding method using a grindstone or the like is adopted, and the most important part is The writing surface of some pen nibs is also created by this abrasive means.

However, subsequent research has revealed that this manufacturing method has the following disadvantages. That is, as mentioned above, since the writing surface of the pen nib is created by polishing means using a grindstone or the like, ink is generated during polishing in the ink passage that penetrates inside the pen nib and opens onto the writing surface. There is a risk that the abrasive powder will become clogged, or the synthetic resin will melt due to the frictional heat generated during polishing, disrupting the pattern shape and blocking the ink passage itself, resulting in ink discharge failure. Not only is this inconvenient, but there are also concerns about maintenance problems due to wear and deterioration of the grindstone, problems with poor writing quality due to the occurrence of polishing chips, and problems with appearance.

(Means for Solving the Problems) The present invention has been made based on the above-mentioned knowledge, and is a method for manufacturing a flat resin pen nib in which ink passages are penetrated in an appropriate pattern. The object of the present invention is to provide a method for manufacturing a flat resin pen nib, characterized in that the writing surface is formed by cutting, and to solve the conventional disadvantages at once.

(Function) According to the present invention, the writing surface of the flat resin pen nib is formed by cutting.

In other words, since the cut surface can be used as a writing surface, there is no fear of clogging of the ink passage due to abrasive powder or clogging of the ink passage due to frictional heat during polishing, and there is no need for maintenance. This problem and the problem caused by the occurrence of abrasive particles can be solved, and therefore, an excellent flat resin pen nib with extremely good ink ejection properties can be provided, and the intended purpose can be achieved.

(Example) This will be explained in detail below based on examples.

In the accompanying drawings, reference numeral 1 designates a long extruded body material that is extruded through a die having an appropriate cross-sectional shape and later becomes a flat resin pen nib.

This resin nib material 1 is mainly made of polyacetal resin,
It is made of polyamide resin, polyester resin, etc., and an ink passage 2 with an appropriate cross-sectional pattern is penetrated through the inside.If we talk about this resin nib material 1, a coating layer is formed around a narrow rod body having an ink passage. Any known material may be used, such as a flat plate-like material by covering a portion thereof, or a flat plate-like material in which the entire resin nib material is not made of a self-fused material of multiple filaments. . As the material for the resin nib material 1, polyacetal resin, which is less abrasive and has good lubricity, is particularly preferred among various synthetic resins.

The resin nib material 1 is cut from the lateral direction (in the direction of the arrow in the figure) using a cutter, cutter, press, etc. that has been previously shaped to cut into the desired nib shape, and is cut into a single flat plate. It becomes a shaped resin nib 5. , (indicated by the dashed line in Figure 1). At this time, the writing surface 4 of the flat resin nib 3 is.

The cut surface by the cutter is that! Since it is applied as a writing surface, the intended purpose is achieved as mentioned above.

As in the above embodiment, if not only the front part but also the rear part of the flat resin nib 3 is cut into the same shape as the front part using a cutter or the like, various problems that occur during polishing can be avoided. There is no risk of causing a problem in connection with the ink guide member, and furthermore, when this pen nib 3 is assembled into a writing instrument.

Since there is no directionality of the pen tip 3, it is expected that work efficiency during assembly of the writing instrument will be improved.

Note that the writing surface 4 of the flat resin nib 3 is as follows.

If necessary, the both ends A as shown by broken lines in FIG.

You can adjust the width by cutting B.

In this case, in addition to cutting with a cutter or the like, there is no problem with machining using abrasive means, and in short, there is no need to employ abrasive means even on the portion that will become the writing surface. The writing surface 4 is particularly preferably formed into a single curved surface as shown in FIG. 6, and a favorable result can be obtained in terms of writing feel.

(Effects of the Invention) As described above in detail, one aspect of the present invention is a method for manufacturing a flat resin pen nib in which ink passages are formed in an appropriate pattern through the inside, and the writing surface of the nib is cut by cutting. Because of this, it not only has the advantages of a flat resin nib, but also eliminates various inconveniences caused by polishing the writing surface as in the past, resulting in better ink ejection performance. It exhibits excellent effects in a number of ways, including:

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a perspective view of a main part of a flat resin nib material. FIG. 2 is a perspective view of the flat resin pen nib, and FIG. 3 is a longitudinal sectional view of the main part of the flat resin nib tip. 1... Flat resin pen nib material, 2...
Ink passage, 6...Flat resin pen nib, 4...
...Writing surface.

Claims (2)

[Claims] (1) A method for manufacturing a flat resin pen nib having an ink passage in an appropriate pattern inside the nib, the writing surface of the nib being formed by cutting. Method. (2) The method for manufacturing a flat resin pen nib according to claim (1), wherein the writing surface is curved.