JPH0686978U - Ink absorber - Google Patents

Abstract

(57) [Summary] [Structure] An ink absorber made of fiber bundles that absorbs ink by capillary force. It has a gas reservoir 3 in the middle. This divides the ink into the ink fountain 4 and the ink fountain portion 5. However, the ink partially communicates with the gas reservoir 3 as well, where the capillary force is strong. [Effect] The ink dischargeability at both ends is stable, and when used in a double-headed writing instrument, the assembling work is easy and the quality is good.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an ink occlusion body that absorbs ink by the capillary force of a fiber bundle. It is suitable for use in a so-called double-headed writing instrument in which ink is supplied to the pen tips on both sides of the barrel.

[0002]

[Prior art and its problems]

 Ink storage materials are not only ordinary writing instruments, but are also very common in what are called double-head writing instruments that have appropriate nibs such as fiber nibs, resin nibs, and ball nibs on both sides of the barrel. Is being used for. For example, one that seems to have the simplest structure is one in which only one type of ink stored in one ink storage material can be supplied to each pen tip from both sides of the ink storage material. This product also has the advantage that it is easy to assemble due to its simple structure, but one ink pen tip side is over-inked while the other ink pen tip side is affected by the weight of the ink. However, there is a drawback in that it is difficult to improve the ink ejection properties at both nibs, such as the handwriting being too thin.

In this respect, although there is only one kind of ink, there is also one in which ink occlusion bodies having different capillarity as a whole are connected in series. Although the ink dischargeability at both nibs has been improved, there is a cost disadvantage because the assembly work is troublesome.

[0004] Also, it is general when inks of different types are used, but there is also one in which each ink occlusion body is used independently for each pen tip. Since two ink absorbers are used, it is also known to dispose an intermediate member for blocking between these two ink absorbers or to provide a blocking layer for connecting the two ink absorbers. However, since these also use two ink occlusion bodies, the troublesome assembly work has not been fundamentally solved.

Therefore, the present invention does not provide an ink occlusion body that can be used in a single use, or one that does not necessarily have to undergo a particularly complicated pretreatment or preprocessing.

[0006]

[Means for Solving the Problems]

 It shall have a gas reservoir in the middle part. This gas reservoir does not completely divide the ink. Ink having a relatively strong capillary force formed by the fibers partially penetrates the gas reservoir and communicates with each other. However, the ink is divided as a whole by the gas reservoir. That is, the present invention is an ink occlusion body made of a fiber bundle that occludes ink by a capillary force, and a gas pool that divides the ink as a whole while allowing the ink to partially communicate at a portion having a strong capillary force. The gist is an ink occlusion body having a central portion.

[0007]

【Example】

 An example will be described with reference to the accompanying drawings. A type is shown in which the outer skin 1 covers a number of fibers 2. The outer cover 1 is made of a film wound material such as cellophane, polyester, polypropylene or the like, or a tubular molded product. There are many types of ink occlusion bodies that do not have the outer cover 1 such as those in which the fibers 2 are formed into a film by fusing or adhesion, but the type that has the outer cover 1 will be described later. It depends on the relationship with ink filling. The fiber 2 is made of polyester, polypropylene, polyethylene, polyacrylonitrile, polyacetate or the like. It may be composed of one kind, or may be composed of a plurality of kinds, such as polyethylene terephthalate coated with polyethylene. Such fibers 2 are bundled with one type or a plurality of types. Regardless of the case where the bundling force of the outer skin 1 is sufficient to form a bundle, it is usually adhered by an adhesive, fusion by gelling of the fiber 2 itself using a gelling agent, or When the fibers 2 having a low melting point layer on the surface are used, they are appropriately integrated by welding by heating. Usually, it is integrated with the outer skin 1. Surface modifiers may be used. It should be noted that the fibers 2 shown in the drawing are straight fibers that are parallel to each other at uniform intervals, but of course, they are schematic fibers. The capillary force as a whole is appropriately selected according to the type of ink, but the capillary force may be strong or weak when the cross section is partially viewed.

Into this, dye inks, pigment inks, water-based inks, oil-based inks, and appropriate inks are filled as much as possible. However, it is not completely filled, and a stable gas (even air is filled) with respect to the ink is accumulated in the portion indicated by reference numeral 3. That is, the ink is a gas reservoir, and the ink is stored in a state of being divided into the ink reservoir 4 and the ink reservoir 5 by the gas reservoir 3.

However, the ink in the ink reservoir 4 and the ink in the ink reservoir 5 are not completely divided by the gas reservoir 3. The fiber 2 forms a portion having a strong capillary force and a portion having a weak capillary force even at the gas reservoir 3, and the ink in the ink reservoir 4 and the ink in the ink reservoir 5 are also at the gas reservoir 3. , The parts with strong capillary force are in communication.

Such a gas reservoir 3 can be formed by various ink filling methods. For example, the needle of the injector for injecting ink may be stabbed at a predetermined length from both ends of the bundle of fibers 2, and the ink may be filled at the same time or with a time lag. It is also possible to fill the ink from one end with one syringe and then fill the ink from the other end with this syringe. In the case of a long-needle injector, the needle may be punctured to a predetermined length to fill the ink, and then the needle puncturing length may be changed to fill the ink. The size and position of the gas reservoir 3 can be set according to the amount of ink to be filled. Alternatively, for example, after filling the ink so that the whole is uniform, a needle of a gas injection syringe may be pierced into the bundle of fibers 2 from above the outer cover 1 to inject an appropriate amount of gas. However, in this case, if the hole after the needle is removed is not sealed, the gas in the gas reservoir 3 escapes to the outside through this hole or the outside air enters, which is not preferable. This is the reason why the one having the outer skin 1 is illustrated. However, even if the outer cover 1 is not provided, the barrel may correspond to the outer cover 1 by filling the ink after the bundle of the fibers 2 is housed in the barrel. For example, there is a case where ink is filled in the refill barrel having air holes in the tail plug so that an air layer is not formed between the barrel inner wall and the bundle of fibers 2. Therefore, the outer skin 1 is not absolutely necessary. Further, for example, a foaming agent that foams upon contact with the ink may be encapsulated with a wall substance that dissolves in the ink, and this may be put in advance in the bundle of the fibers 2 to fill the ink.

Table 1 shows a specific example in which the gas reservoir 3 improves the ink dischargeability at both nibs. The outer cover 1 is a cylindrical extruded product of polypropylene, and the fiber 2 is a mixed fiber composed of 30% polyethylene terephthalate coated with polyethylene and 70% polyethylene terephthalate fiber, a fiber bundle (bonded to each other, etc.). No, and the basis weight as a bundle obtained by simply molding the outer cover 1) is 4.5 g / m, a thickness of 6 mm, and a length of 120 mm, and the ink can be replaced with air from both ends of the ink occlusion body. It was housed in a shaft cylinder having such a pore structure, and 1.8 g of an aqueous pigment ink containing carbon black as a coloring agent was filled (corresponding to 85% of the filling amount). The one with the gas reservoir 3 formed (A in Table 1) and the one with only uniform filling but not the gas reservoir 3 (B in Table 1) were produced (each 10), and the shaft was prepared. Both sides of the tube Attach the various nibs listed in Table 1 to the pen, leave it in a vertical state at 50 ° C for 1 month, remove the cap, leave the nibs in the same orientation, and write with each pen nib. The Y value) is measured. The smaller the value, the darker the handwriting. In Table 1, the brush nib is a nib formed of nylon resin in the shape of a brush with urethane resin, and the other nibs are nibs formed by shaping the end of a round bar into a hemisphere. The one with the resin nib was filled with 3.5 cps of ink, and the other with the nib was filled with 4.0 cps of ink.

[0012]

[Table 1]

It can be seen that the presence of the gas reservoir 3 reduces the difference in handwriting density and stabilizes the ink ejection performance at both nibs. In Table 1, the nibs on both sides are the same type for ease of confirmation of the stability of the handwriting density, but of course, different types may be attached. Further, it may be used for an ordinary writing instrument having a pen tip only at one end. The ink is also communicated with the gas reservoir 3, so that the ink is effectively consumed.

[0014]

[Effect of device]

 As described above, since the ink occlusion body of the present invention has the gas reservoir portion in the middle which divides the ink as a whole while allowing the ink to partially communicate with the portion having a strong capillary force, If the ink is ejected on the side of the writing head and is used for a double-headed writing instrument, the assembling work is easy and the quality is good.

[Brief description of drawings]

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

[Explanation of symbols]

 1 Skin 2 Fiber 3 Gas Reservoir 4 Ink Reservoir 5 Ink Reservoir

Claims (1)

[Scope of utility model registration request] 1. An ink occlusion body made of a fiber bundle that occludes ink by a capillary force, which comprises a gas reservoir part for partially communicating the ink at a portion having a strong capillary force and for dividing the ink as a whole. The ink occlusion body in the middle part.