JP4338843B2 - Double-headed ballpoint pen - Google Patents

Double-headed ballpoint pen Download PDF

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Publication number
JP4338843B2
JP4338843B2 JP26472199A JP26472199A JP4338843B2 JP 4338843 B2 JP4338843 B2 JP 4338843B2 JP 26472199 A JP26472199 A JP 26472199A JP 26472199 A JP26472199 A JP 26472199A JP 4338843 B2 JP4338843 B2 JP 4338843B2
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JP
Japan
Prior art keywords
ballpoint pen
cylinder
ink
tip
rear end
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP26472199A
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Japanese (ja)
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JP2001080285A (en
Inventor
正広 木暮
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pilot Corp KK
Original Assignee
Pilot Corp KK
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Pilot Corp KK filed Critical Pilot Corp KK
Priority to JP26472199A priority Critical patent/JP4338843B2/en
Publication of JP2001080285A publication Critical patent/JP2001080285A/en
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Publication of JP4338843B2 publication Critical patent/JP4338843B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Pens And Brushes (AREA)
  • Mechanical Pencils And Projecting And Retracting Systems Therefor, And Multi-System Writing Instruments (AREA)

Description

【0001】
【発明の属する技術分野】
本発明は、インキ収容筒内に剪断減粘性を有したインキと該インキの消費とともに追従するグリース状のフォロワーを充填した2つのボールペンレフィールを、1つの軸筒内に各々のボールペンチップの先端が両端開口部より露出するように配設してなる両頭式ボールペンに関する。
【0002】
【従来の技術】
従来、1つのインキ収容筒内に、例えば色の異なった油性インキを両端側に充填し、両端開口部にボールペンチップを配設したボールペンレフィールを、軸筒内に、ボールペンチップの先端が両端開口部から露出するように配設してなる構造の両頭式ボールペンは知られている。
【0003】
また、ボールペンとして、インキ収容筒に剪断減粘性を有したいわゆるゲルインキと呼ばれているインキを、該インキの後端にインキの消費にともないインキに追随して移動するグリース状のフォロワーを配設して、直に収容してなるものが知られている。
【0004】
【発明が解決しようとする課題】
本発明者は、剪断減粘性を有したインキを充填した、ボールペンチップの先端が軸筒の両端開口部から露出するように配設した両頭式ボールペンにおいて、組立構造が簡単で、部材も安価に得られ、安価で量産に適した構造のものを提供することとした。検討したところ、1つのボールペンレフィールのインキ収容筒の両端側の内部に、剪断減粘性を有したインキと該インキの消費とともに追従するグリース状のフォロワーを充填することは、現実問題としての難しさがあることが判り、本発明者は、2つのボールペンレフィールの各々のインキ収容筒に剪断減粘性を有したインキとグリース状のフォロワーを充填し、その2つのボールペンレフィールを、軸筒内にチップ先端が両端開口部から露出するように収納した構造の両頭式ボールペンを提供することとし、本発明に至った。
【0005】
【課題を解決するための手段】
本発明は、インキ収容筒の先端部に、チップ先端内にボールを回転自在に抱持したボールペンチップを配設し、インキ収容筒内に剪断減粘性を有したインキと該インキの消費とともに追従するグリース状のフォロワーを充填し、インキ収容筒の開口した後端面に、該後端面の一部を残して側面を切り欠いた切欠部を有した2つのボールペンレフィールを、軸筒の内部を2つの空間室に分割する軸筒と一体に形成した仕切片により仕切った軸筒の各空間室に、各々のボールペンレフィールのインキ収容筒の後端面を仕切片に当接させて、各々のボールペンチップの先端が先端開口部より露出するように軸筒内に配設してなる両頭式ボールペンであって、前記各々のボールペンレフィールを、前記軸筒の両端部に着脱自在に螺着した口金と前記仕切片とで挾持して配設するとともに、各々のボールペンレフィールのインキ収容筒に設けた切欠部と軸筒の仕切片とで形成される隙間を、各々のインキ収容筒の内外を連通する各々の空気流通部とし、前記仕切片に、各々のボールペンレフィールのインキ収容筒の開口した後端を連通するインキ収容筒の内径より小径な連通孔を設けたことを特徴とする両頭式ボールペンである
【0006】
本発明においては、2つのボールペンレフィールのインキ収容筒に剪断減粘性を有したインキを充填するが、各々のインキ収容筒に充填するインキは、同一のインキであっても良いしあるいはインキ組成物が異なった異種のインキであっても良い。また、インキ収容筒の後端部に形成する各々の切欠部は、形状が同一であっても良いし異なるものであっても良い。また、インキ収容筒の先端部にボールペンチップを配設するが、インキ収容筒の先端部を小径として直にボールペンチップを挿着しても良いし、ボールペンチップをチップホルダーに挿着し、該チップホルダーをインキ収容筒の開口端部に挿着するものであっても良い。ボールペンチップの構造は、チップ先端内に回転自在に抱持したボールがスプリング等により押圧された構造のものであっても良い。
【0007】
【発明の実施の形態】
本発明の実施の形態を図面を用いて説明する。同部材、同箇所を示すものに対しては、同符号を付してある。
図1〜図3に示す参考の両頭式ボールペン1は、2つのボールペンレフィール2、3をインキ収容筒4の開口した後端面5を互いに当接させて、軸筒6内に配設した構造としてある。
【0008】
2つのボールペンレフィール2、3は、インキ収容筒4の先端部には、図示していないが、ボールを回転自在に抱持し、該ボールをスプリングによりチップ先端縁に押圧したボールペンチップ7がチップホルダー8を介して配設してある。インキ収容筒4内には、剪断減粘性を有したインキ9と該インキの消費とともに追従するグリース上のフォロワー10を充填してある。
【0009】
2つのボールペンレフィール2、3のインキ収容筒4の開口した後端面5には、該後端面5の一部を残すように側面を切り欠いた切欠部11を設けてある。2つのボールペンレフィール2、3を互いの後端面5を当接させることにより、切欠部11により形成される隙間を、各々のボールペンレフィール2、3のインキ収容筒4の内外を連通する空気流通部12としてある。図1及び図2においては、各々のボールペンレフィール2、3に設けた切欠部11が対向するように2つのボールペンレフィール2、3を配設してあり、1つの空気流通部12として形成されているが、位置が相違すれば2つのボールペンレフィール2、3に各々の空気流通部12が2つ形成されることになる。
【0010】
前述したように、2つのボールペンレフィール2、3を、インキ収容筒4の開口した後端面5を互いに当接させて軸筒6内に配設してあり、2つのボールペンレフィール2、3の各々のボールペンチップ7の先端が、軸筒6の両端開口部から露出するように収納してある。ボールペンレフィール2、3が軸筒6内を移動しないように、ボールペンレフィール2、3を、各々のチップホルダー8の鍔部13を両端開口部に螺着した口金14と軸筒6の先端で挾持して固定してある。軸筒6の略中央部の外周面には、軸筒6内の空気を外に逃がすための空気逃げ孔15を設けてあり、ボールペンレフィール2、3のインキ収容筒4の内部は、各空気流通部12〜軸筒6内部〜空気逃げ孔15の経路で軸筒6の外部と連通している。
【0011】
図4および図5は、請求項1に係る発明の実施の形態を示す両頭式ボールペン21で、ボールペンレフィールは、前記2つのボールペンレフィール2、3と同様の構造としてある。
【0012】
軸筒22は、略中央部に内部を2つの空間室23、24に分割する軸筒22と一体に形成した仕切片25を設けてある。各々のボールペンレフィール2、3は、インキ収容筒4の後端面5を仕切片25の両面に各々当接させて、前記実施の形態の場合と同様にして軸筒22内に配設してある。各々のボールペンレフィール2、3が空間室23、24を移動しないように、前記実施の形態の場合と同様に、ボールペンレフィール2、3を、チップホルダー8の鍔部13を両端開口部に螺着した口金14と軸筒6で挾持して固定してある。
【0013】
各々のボールペンレフィール2、3のインキ収容筒4に設けた切欠部11と軸筒の仕切片25とで構成される隙間を、各々のインキ収容筒4の内外を連通する各々の空気流通部26としてある。
【0014】
本実施の形態においては、各々の空間室23、24内が加圧や減圧により各々のボールペンレフィール2、3に悪影響がでないように、仕切片25の中央部に、各々のボールペンレフィール2、3のインキ収容筒4の開口した後端を連通するインキ収容筒4の内径より小径な連通孔27を設けてある。
【0015】
空間室24側の軸筒22の外周面には、軸筒22内の空気を外に逃がすための空気逃げ孔28を設けてある。ボールペンレフィール2のインキ収容筒4の内部は、空気流通部26〜連通孔27〜空気流通部26(ボールペンレフィール3側)〜空間室24〜空気逃げ孔28の経路で、または連通孔27〜(インキ収容筒4内部(ボールペンレフィール3側))〜空気流通部26(ボールペンレフィール3側)〜空間室24〜空気逃げ孔28の経路で軸筒22の外部と連通している。ボールペンレフィール3のインキ収容筒4の内部は、空気流通部26〜空間室24〜空気逃げ孔28の経路で軸筒22の外部と連通している。
【0016】
本発明に係る実施の形態において、キャップについては図示・説明を省略してあるが、キャップを有さない構造の両頭式ボールペンということではない。軸筒の両端から露出したボールペンチップの先端部を被覆するために、キャップを装着するものである。
【0017】
本発明の実施の形態において、2つのボールペンレフィール2、3に配設されたボールペンチップ6のボールの外径は、例えば一方のボールペンレフィール2においては0.5mmとし、他方のボールペンレフィール3においては1.0mmというように変えてもよい。ボールの外径を異ならせることにより、一本で2種類の筆跡幅が得られる両頭式ボールペンとなる。また、一方のボールペンレフィール2と他方のボールペンレフィール3のインキ収容筒4に充填したインキの色を異ならせることにより、一本で2色の筆跡が得られる両頭式ボールペンとなる。
【0018】
【発明の効果】
本発明のインキ収容筒内に剪断減粘性インキとフォロワーを充填した両頭式ボールペンは、前述したような構造なので、いたって簡単な構造であり、また、1本のボールペンレフィールのインキ収容筒の前後端に剪断減粘性を有したインキおよびフォロワーを充填する構造のものではないので、製造上の困難や難しさがなく、各部材の構造や組立もいたって簡単であり、製造コストの面で安価に製造でき、低価格品の両頭式ボールペンを提供できるという利点がある。
【図面の簡単な説明】
【図1】 参考の両頭式ボールペンの横断面図である。
【図2】 図1における、要部の拡大図である。
【図3】 図1におけるボールペンレフィールの、要部の拡大斜視図である。
【図4】 本発明に係る実施の形態を示す、両頭式ボールペンの横断面図である。
【図5】 図4における、要部の拡大斜視図である。
【符号の説名】
1 両頭式ボールペン
2 ボ―ルペンレフィール
3 ボールペンレフィール
4 インキ収容筒
5 後端面
6 軸筒
7ボールペンチップ
9 インキ
10 フォロワー
11 切欠部
12 空気流通部
21 両頭式ボールペン
22 軸筒
23 空間室
24 空間室
25 仕切片
26 空気流通部
27 連通孔
[0001]
BACKGROUND OF THE INVENTION
In the present invention, two ballpoint pen refills filled with ink having shear thinning viscosity in an ink containing cylinder and a grease-like follower that follows the consumption of the ink are provided, and the tip of each ballpoint pen tip is placed in one shaft cylinder. The present invention relates to a double-headed ballpoint pen that is disposed so as to be exposed from both end openings.
[0002]
[Prior art]
Conventionally, for example, a ball pen refill in which one end of an ink containing cylinder is filled with oil-based inks of different colors and a ballpoint pen tip is disposed at both end openings, the tip of the ballpoint pen tip is open at both ends in the shaft cylinder. 2. Description of the Related Art A double-headed ballpoint pen having a structure in which it is disposed so as to be exposed from a portion is known.
[0003]
In addition, as a ballpoint pen, a so-called gel ink with shear thinning viscosity is installed in the ink storage cylinder, and a grease-like follower is provided at the rear end of the ink to move following the ink consumption. What is directly housed is known.
[0004]
[Problems to be solved by the invention]
The inventor of the present invention is a double-ended ballpoint pen filled with ink having shear thinning viscosity and arranged so that the tip of the ballpoint pen tip is exposed from the opening at both ends of the shaft tube. It was decided to provide an inexpensive and suitable structure for mass production. As a result of investigation, it is difficult as a real problem to fill the ink containing cylinder of one ballpoint pen refill with ink having shear thinning viscosity and a grease-like follower that follows the consumption of the ink. The present inventor filled each ink containing cylinder of the two ballpoint pen refills with ink having a viscosity reduction and a grease-like follower, and inserted the two ballpoint pen refills into the shaft cylinder. The present invention has been achieved by providing a double-headed ballpoint pen having a structure in which the tip is housed so as to be exposed from the openings at both ends.
[0005]
[Means for Solving the Problems]
According to the present invention, a ballpoint pen tip having a ball rotatably held in the tip end is arranged at the tip of the ink containing cylinder, and the ink containing cylinder has shear thinning viscosity and follows the consumption of the ink. Two ballpoint pen refills having a notched portion in which the rear end face of the ink containing cylinder is left open and a part of the rear end face is cut off are provided on the rear end face of the ink containing cylinder. Each ball-point pen tip is brought into contact with the partitioning piece at the rear end surface of the ink-holding cylinder of each ball-point pen refill in each space chamber of the axis cylinder partitioned by a partition piece formed integrally with the axis cylinder divided into two space chambers. A double- ended ballpoint pen that is disposed in the shaft cylinder so that the tip of the lens barrel is exposed from the tip opening, and each of the ballpoint pen refills is detachably screwed to both ends of the shaft cylinder, and Finishing While disposed in sandwiched between pieces, the gap formed by the partition piece of the cut-out portion and the shaft tube formed in the ink holding tube of each ball point pen refill, each for communicating the inside and outside of each of the ink accommodating tube It is a double-headed ballpoint pen characterized in that it is an air circulation part, and the partition piece is provided with a communication hole having a diameter smaller than the inner diameter of the ink storage cylinder communicating with the rear end of the ink storage cylinder of each ballpoint pen refill. .
[0006]
In the present invention, the ink containing cylinders of two ballpoint pen refills are filled with ink having shear thinning viscosity. The ink filled in each ink containing cylinder may be the same ink or an ink composition. May be different kinds of inks. Further, the respective cutout portions formed at the rear end portion of the ink containing cylinder may have the same shape or different shapes. In addition, a ballpoint pen tip is disposed at the tip of the ink containing cylinder. However, the tip of the ink containing cylinder may have a small diameter, and the ballpoint pen tip may be directly inserted. The chip holder may be inserted into the opening end of the ink storage cylinder. The structure of the ballpoint pen tip may be a structure in which a ball held rotatably in the tip end is pressed by a spring or the like.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings. The same reference numerals are given to the same members and parts indicating the same portions.
The reference double-headed ballpoint pen 1 shown in FIGS. 1 to 3 has a structure in which two ballpoint pen refills 2 and 3 are disposed in a shaft cylinder 6 with the rear end surfaces 5 of the ink storage cylinder 4 being in contact with each other. is there.
[0008]
Although not shown, the two ballpoint pen refills 2 and 3 hold the ball rotatably at the tip of the ink containing cylinder 4 and the ballpoint pen tip 7 that presses the ball against the tip edge of the tip by a spring is the tip. It is arranged via a holder 8. The ink containing cylinder 4 is filled with ink 9 having shear thinning viscosity and a follower 10 on the grease that follows the consumption of the ink.
[0009]
The rear end face 5 of the two ballpoint pen refills 2 and 3 where the ink storage cylinder 4 is opened is provided with a notch 11 having a cut-out side face so as to leave a part of the rear end face 5. By bringing the two ballpoint pen refills 2 and 3 into contact with each other's rear end surface 5, an air circulation portion that communicates the inside and outside of the ink containing cylinder 4 of each ballpoint pen refill 2 and 3 with the gap formed by the notch portion 11. It is as 12. In FIG. 1 and FIG. 2, two ball pen refills 2, 3 are arranged so that the notch portions 11 provided in each ball pen refill 2, 3 face each other, and are formed as one air circulation portion 12. However, if the positions are different, two air circulation portions 12 are formed in the two ballpoint pen refills 2 and 3.
[0010]
As described above, the two ballpoint pen refills 2 and 3 are arranged in the shaft cylinder 6 with the rear end surfaces 5 of the ink containing cylinders 4 being in contact with each other. The tip of the ballpoint pen tip 7 is housed so as to be exposed from the opening portions at both ends of the shaft tube 6. In order to prevent the ballpoint pen refills 2 and 3 from moving in the shaft tube 6, the ballpoint pen refills 2 and 3 are held between the base 14 in which the flanges 13 of the respective chip holders 8 are screwed into the openings at both ends and the tip of the shaft tube 6. And fixed. An air escape hole 15 for escaping the air in the shaft tube 6 to the outside is provided on the outer peripheral surface of the substantially central portion of the shaft tube 6, and the interior of the ink containing tube 4 of the ballpoint pen refills 2, 3 It communicates with the outside of the shaft tube 6 through a path from the flow part 12 to the inside of the shaft tube 6 to the air escape hole 15.
[0011]
FIGS. 4 and 5 are double-headed ballpoint pens 21 showing an embodiment of the invention according to claim 1 , and the ballpoint pen refill has the same structure as the two ballpoint pen refills 2 and 3.
[0012]
The shaft cylinder 22 is provided with a partition piece 25 formed integrally with the shaft cylinder 22 that divides the interior into two space chambers 23 and 24 at a substantially central portion. Each of the ballpoint pen refills 2 and 3 is disposed in the shaft cylinder 22 in the same manner as in the above-described embodiment, with the rear end surface 5 of the ink containing cylinder 4 abutting on both surfaces of the partition piece 25. . Screwed such that each ball point pen refill 2 and 3 does not move the space chamber 23 and 24, as in the case of the embodiment, a ball point pen refill 2, the flange portion 13 of the chip holder 8 at both end opening The cap 14 and the shaft tube 6 are held and fixed.
[0013]
Each air circulation portion 26 that communicates the inside and the outside of each ink containing cylinder 4 with a gap formed by the notch 11 provided in the ink containing cylinder 4 of each ballpoint pen refill 2, 3 and the partition piece 25 of the shaft cylinder. It is as.
[0014]
In the present embodiment, so as not to adversely affect the respective ball point pen refill 2 each space chamber 23 and 24 by applying pressure or vacuum, in the central portion of the partition member 25, each ball point pen refill 2,3 Oh Ru of the opened rear end of the ink containment tube 4 than the inner diameter of the ink reservoir tube 4 which communicates provided a small diameter hole 27.
[0015]
An air escape hole 28 is provided on the outer peripheral surface of the shaft tube 22 on the space chamber 24 side for allowing the air in the shaft tube 22 to escape to the outside. The inside of the ink containing cylinder 4 of the ballpoint pen refill 2 is a path from the air circulation part 26 to the communication hole 27 to the air circulation part 26 (ball pen refill 3 side) to the space chamber 24 to the air escape hole 28 or the communication holes 27 to ( It communicates with the outside of the shaft cylinder 22 through the path of the ink containing cylinder 4 (ball pen refill 3 side) to the air circulation part 26 (ball pen refill 3 side) to the space chamber 24 to the air escape hole 28. The inside of the ink containing cylinder 4 of the ballpoint pen refill 3 communicates with the outside of the shaft cylinder 22 through the path of the air circulation portion 26, the space chamber 24, and the air escape hole 28.
[0016]
In the embodiment according to the present invention , illustration and description of the cap are omitted, but this is not a double-headed ballpoint pen having a structure without the cap. A cap is attached to cover the tip of the ballpoint pen tip exposed from both ends of the shaft tube.
[0017]
In the embodiment of the present invention, the outer diameter of the ball of the ball-point pen tip 6 disposed in the two ball-point pen refills 2 and 3 is, for example, 0.5 mm in one ball-point pen refill 2 and in the other ball-point re-fill 3. It may be changed to 1.0 mm. By making the outer diameters of the balls different, a double-headed ballpoint pen can be obtained in which two types of handwriting widths can be obtained with one. Further, by changing the color of the ink filled in the ink containing cylinder 4 of one ballpoint pen refill 2 and the other ballpoint pen refill 3, a double-headed ballpoint pen can be obtained in which two colors of handwriting are obtained.
[0018]
【The invention's effect】
Since the double-headed ballpoint pen filled with the shear thinning ink and the follower in the ink storage cylinder of the present invention has the structure as described above, it has a simple structure, and the front and back of the ink storage cylinder of one ballpoint pen refill Since it is not a structure filled with ink and follower having shear thinning viscosity at the end, there are no manufacturing difficulties or difficulties, the structure and assembly of each member is simple, and it is inexpensive in terms of manufacturing cost There is an advantage that a low-priced double-headed ballpoint pen can be provided.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a reference double-headed ballpoint pen.
FIG. 2 is an enlarged view of a main part in FIG.
FIG. 3 is an enlarged perspective view of a main part of the ballpoint pen refill in FIG. 1;
Figure 4 shows an embodiment of the present onset bright, is a cross-sectional view of Ryoatamashiki ballpoint pen.
FIG. 5 is an enlarged perspective view of a main part in FIG . 4 ;
[Name of the code]
DESCRIPTION OF SYMBOLS 1 Double-headed ball-point pen 2 Ball-point pen refill 3 Ball-point pen refill 4 Ink receiving cylinder 5 Rear end surface 6 Axle cylinder 7 Ball-point pen tip 9 Ink 10 Followers 11 Notch part 12 Air distribution part 21 Double-headed ball-point pen 22 Axle cylinder 23 Space room 24 Space room 25 Partition piece 26 Air circulation part 27 Communication hole

Claims (1)

インキ収容筒の先端部に、チップ先端内にボールを回転自在に抱持したボールペンチップを配設し、インキ収容筒内に剪断減粘性を有したインキと該インキの消費とともに追従するグリース状のフォロワーを充填し、インキ収容筒の開口した後端面に、該後端面の一部を残して側面を切り欠いた切欠部を有した2つのボールペンレフィールを、軸筒の内部を2つの空間室に分割する軸筒と一体に形成した仕切片により仕切った軸筒の各空間室に、各々のボールペンレフィールのインキ収容筒の後端面を仕切片に当接させて、各々のボールペンチップの先端が先端開口部より露出するように軸筒内に配設してなる両頭式ボールペンであって、前記各々のボールペンレフィールを、前記軸筒の両端部に着脱自在に螺着した口金と前記仕切片とで挾持して配設するとともに、各々のボールペンレフィールのインキ収容筒に設けた切欠部と軸筒の仕切片とで形成される隙間を、各々のインキ収容筒の内外を連通する各々の空気流通部とし、前記仕切片に、各々のボールペンレフィールのインキ収容筒の開口した後端を連通するインキ収容筒の内径より小径な連通孔を設けたことを特徴とする両頭式ボールペン。A ballpoint pen tip having a ball rotatably held in the tip end is disposed at the tip of the ink containing cylinder, and the ink containing the shear thinning viscosity in the ink containing cylinder and a grease-like shape that follows as the ink is consumed. Filled with a follower, two ballpoint pen refills having a notch part with the side face notched leaving the rear end face on the rear end face of the ink containing cylinder open, and the interior of the shaft cylinder into two space chambers. The rear end surface of the ink storage cylinder of each ballpoint pen refill is brought into contact with the partitioning piece in each space chamber of the axial cylinder partitioned by the partitioning piece formed integrally with the axial cylinder to be divided, and the tip of each ballpoint pen tip is the leading end. A double-headed ballpoint pen that is disposed in a shaft cylinder so as to be exposed from an opening, wherein each ballpoint pen feeler is detachably screwed to both ends of the shaft cylinder and the partition piece.挾Thereby disposed in a gap formed by the partition piece of the cut-out portion and the shaft tube formed in the ink holding tube of each ball point pen refill, and each of the air circulation unit that communicates the inside and outside of each of the ink accommodating tube A double-headed ballpoint pen , wherein the partition piece is provided with a communication hole having a diameter smaller than the inner diameter of the ink storage cylinder communicating with the rear end of the ink storage cylinder of each ballpoint pen refill .
JP26472199A 1999-09-20 1999-09-20 Double-headed ballpoint pen Expired - Fee Related JP4338843B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP26472199A JP4338843B2 (en) 1999-09-20 1999-09-20 Double-headed ballpoint pen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP26472199A JP4338843B2 (en) 1999-09-20 1999-09-20 Double-headed ballpoint pen

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JP2001080285A JP2001080285A (en) 2001-03-27
JP4338843B2 true JP4338843B2 (en) 2009-10-07

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Family Applications (1)

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Country Link
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103182886A (en) * 2013-04-10 2013-07-03 蔡旭升 Double-head pen

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4844430B2 (en) * 2007-02-28 2011-12-28 ぺんてる株式会社 Double-head writing instrument
CN114454642B (en) * 2022-03-16 2023-04-18 汕头市美华文具有限公司 Ball pen processing technology

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103182886A (en) * 2013-04-10 2013-07-03 蔡旭升 Double-head pen

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