WO2010109519A1 - Engraving needle - Google Patents

Engraving needle Download PDF

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Publication number
WO2010109519A1
WO2010109519A1 PCT/JP2009/001307 JP2009001307W WO2010109519A1 WO 2010109519 A1 WO2010109519 A1 WO 2010109519A1 JP 2009001307 W JP2009001307 W JP 2009001307W WO 2010109519 A1 WO2010109519 A1 WO 2010109519A1
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WIPO (PCT)
Prior art keywords
engraving needle
engraving
angle
degrees
tip
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PCT/JP2009/001307
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French (fr)
Japanese (ja)
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星山勇一
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セムコ株式会社
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Priority to PCT/JP2009/001307 priority Critical patent/WO2010109519A1/en
Publication of WO2010109519A1 publication Critical patent/WO2010109519A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B27/00—Tools for turning or boring machines; Tools of a similar kind in general; Accessories therefor
    • B23B27/14—Cutting tools of which the bits or tips or cutting inserts are of special material
    • B23B27/18—Cutting tools of which the bits or tips or cutting inserts are of special material with cutting bits or tips or cutting inserts rigidly mounted, e.g. by brazing
    • B23B27/20—Cutting tools of which the bits or tips or cutting inserts are of special material with cutting bits or tips or cutting inserts rigidly mounted, e.g. by brazing with diamond bits or cutting inserts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44B—MACHINES, APPARATUS OR TOOLS FOR ARTISTIC WORK, e.g. FOR SCULPTURING, GUILLOCHING, CARVING, BRANDING, INLAYING
    • B44B3/00—Artist's machines or apparatus equipped with tools or work holders moving or able to be controlled substantially two- dimensionally for carving, engraving, or guilloching shallow ornamenting or markings
    • B44B3/02—Artist's machines or apparatus equipped with tools or work holders moving or able to be controlled substantially two- dimensionally for carving, engraving, or guilloching shallow ornamenting or markings wherein plane surfaces are worked
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
    • B44C1/00—Processes, not specifically provided for elsewhere, for producing decorative surface effects
    • B44C1/22—Removing surface-material, e.g. by engraving, by etching
    • B44C1/222—Removing surface-material, e.g. by engraving, by etching using machine-driven mechanical means

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)

Abstract

There has been such a problem that an engraving needle used in an image engraving device, which performs engraving by scanning on a paper or a thin plastic plate by relative motion of the engraving needle and an engraved plate, cannot cut off a surface with an accurate depth without breaking the engraving plate. In an engraving needle (10), the cutting edge at the tip of the engraving needle (10) has an obtuse open angle of 120 degrees or more, the rake angle (α) is an acute angle of 5 degrees or less, the clearance angle (β) is in the range of 20-45 degrees, and a difference within 1 degree is imparted between the left and right open angles (δL, δR) of the cutting edge at the tip thus solving the matter.

Description

彫刻針Engraving needle
　彫刻針と被彫刻板の相対運動によって、走査式に彫刻を行う彫刻装置に用いられる彫刻針に関し、被彫刻板への彫刻を行う際に深さ方向及び幅方向に正確な彫刻を可能とする彫刻針に関するものである。 With respect to the engraving needle used in the engraving apparatus that performs engraving in a scanning manner by the relative movement of the engraving needle and the plate to be engraved, accurate engraving can be performed in the depth direction and the width direction when engraving on the plate to be engraved. It relates to engraving needles.
　彫刻針と被彫刻板の相対運動によって、走査式に紙やプラスチック製の薄板に彫刻を行う画像彫刻装置がある（特許文献１参照）。この画像彫刻装置では、基台上に取り付けられた被彫刻板が水平方向に往復運動を行い、垂直方向から降ろされた前記彫刻針が紙やプラスチックからなる材質の前記被彫刻板を表面から削り取ることにより透かし彫りを行う。このようにして透かし彫りがなされた前記被彫刻板は、個人認証カードや重要書類用のセキュリティシートとして用いられる（特許文献２、３参照）。 There is an image engraving device that performs engraving on a thin plate made of paper or plastic by a relative movement of the engraving needle and the plate to be engraved (see Patent Document 1). In this image engraving apparatus, the engraving plate mounted on the base reciprocates in the horizontal direction, and the engraving needle lowered from the vertical direction scrapes off the engraving plate made of paper or plastic from the surface. Do the openwork. The above-mentioned engraved board thus engraved is used as a personal authentication card or a security sheet for important documents (see Patent Documents 2 and 3).
　従来、印刷に用いられるグラビアシリンダの彫刻に用いられるダイアモンドスタイラスがあった（特許文献４参照）。これは、グラビア印刷を行うためのシリンダ上にインクをためるための窪みを作るための彫刻針であり、これらを用いて前記彫刻針と被彫刻板の相対運動によって走査式に紙やプラスチック製の薄板に彫刻を行う画像彫刻装置に用いても、被彫刻板に窪みができるだけで、正確な深さで表面を削り取ることは出来なかった。 Conventionally, there has been a diamond stylus used for engraving gravure cylinders used for printing (see Patent Document 4). This is an engraving needle for making a recess for accumulating ink on a cylinder for performing gravure printing, and using these, a paper or plastic made of paper or plastic is scanned by the relative movement of the engraving needle and the plate to be engraved. Even when used in an image engraving apparatus for engraving a thin plate, the engraved plate could only be recessed, and the surface could not be scraped to an accurate depth.
特開平０５－０２４３９４号公報Japanese Patent Laid-Open No. 05-024394 特開２００７－１１８３９５号公報JP 2007-118395 A 特開２００７－１３０８５５号公報JP 2007-130855 A 特開平１１－２９１４３７号公報JP 11-291437 A
　解決しようとする問題点は、彫刻針と被彫刻板の相対運動によって走査式に紙やプラスチック製の薄板に彫刻を行う画像彫刻装置において、正確な深さ及び幅で表面を削り取ることが出来なかった点である。 The problem to be solved is that an image engraving apparatus that engraves a thin sheet of paper or plastic by scanning with the relative movement of the engraving needle and the plate to be engraved cannot scrape the surface with an accurate depth and width. It is a point.
　本発明の彫刻針は、切削方向に対して概略垂直に起立した前面が平坦で、先端部に一対の切り刃を有し、後ろ側に所定の逃げ角の逃げ面を有することを最も主要な特徴とする。 The most important feature of the engraving needle of the present invention is that the front surface, which stands substantially perpendicular to the cutting direction, is flat, has a pair of cutting edges at the tip, and has a clearance surface with a predetermined clearance angle on the rear side. Features.
　本発明の彫刻針は、切削方向に対して概略垂直に起立した前面が平坦で、先端部に一対の切り刃を有し、後ろ側に所定の逃げ角の逃げ面を有することを最も主要な特徴とするため、正確な深さ及び幅で表面を削り取ることが可能になった。また、その際には被彫刻板が紙やプラスチック製の薄板であっても、それらを破ることなく彫刻が可能となった。 The most important feature of the engraving needle of the present invention is that the front surface, which stands substantially perpendicular to the cutting direction, is flat, has a pair of cutting edges at the tip, and has a clearance surface with a predetermined clearance angle on the rear side. Due to the features, it has become possible to scrape the surface with an accurate depth and width. At that time, even if the plate to be engraved is a thin plate made of paper or plastic, engraving is possible without breaking them.
本発明実施例の彫刻針の三面図である（実施例１）。It is a three-view figure of the sculpture needle of the example of the present invention (example 1). 本発明実施例の彫刻針の先端部の拡大図である（実施例１）。(Example 1) which is an enlarged view of the front-end | tip part of the engraving needle of an Example of this invention.
　彫刻針と被彫刻板の相対運動によって走査式に彫刻を行う彫刻装置に使われる彫刻針において、正確な深さ及び幅で彫刻が出来ないという問題点や、被彫刻板が紙やプラスチック製の薄板を破ることなく彫刻が出来ないという問題点を、彫刻針の先端の切り刃の開き角度を１２０度以上の鈍角とし、前傾角が５度以下の鋭角とし、前逃角度が２０度から４５度の範囲とすることにより解決した。 In the engraving needle used in the engraving device that performs engraving in a scanning manner by the relative movement of the engraving needle and the plate to be engraved, there is a problem that the engraving cannot be performed with an accurate depth and width, and the plate to be engraved is made of paper or plastic The problem that engraving is not possible without breaking the thin plate is that the opening angle of the cutting edge at the tip of the engraving needle is an obtuse angle of 120 degrees or more, the forward tilt angle is an acute angle of 5 degrees or less, and the front relief angle is 20 degrees to 45 degrees. It was solved by setting the range of degrees.
　図１は、本発明実施例の彫刻針１０（チップ部３１と支持棒部１１の両方を含む）の三面図である。 FIG. 1 is a three-side view of an engraving needle 10 (including both a tip portion 31 and a support rod portion 11) according to an embodiment of the present invention.
　図１（Ａ）は、彫刻の走査方向の進行方向側から見た彫刻針の正面図である。 FIG. 1 (A) is a front view of the engraving needle as seen from the traveling direction side of the engraving scanning direction.
　図１（Ｂ）は、被彫刻板側から見た彫刻針の下面図である。 FIG. 1 (B) is a bottom view of the engraving needle viewed from the engraved plate side.
　図１（Ｃ）は、走査方向の側面側からみた彫刻針の側面図である。 FIG. 1C is a side view of the engraving needle viewed from the side in the scanning direction.
　また、図２は、その先端部に取り付けられたダイアモンドチップ３１（彫刻針）部分の構造がよくわかるようにした拡大図である。 FIG. 2 is an enlarged view showing the structure of the diamond tip 31 (engraving needle) attached to the tip of the tip.
　図２（Ａ）に側面拡大図、図２（Ｂ）に後面の拡大図を示す。 2A is an enlarged side view, and FIG. 2B is an enlarged view of the rear surface.
　彫刻針１０（チップ部３１と支持棒部１１の両方を含む）は、金属製の支持棒１１及びその先端に装着されたダイアモンドチップ３１（彫刻針）からなる。彫刻針の材料としてはダイアモンド製が一番硬度が硬く性能が良い。又、ダイアモンド以外の材料として超硬鋼製などを用いることも可である。 The engraving needle 10 (including both the tip portion 31 and the support rod portion 11) is composed of a metal support rod 11 and a diamond tip 31 (engraving needle) attached to the tip thereof. Diamond is the hardest material for engraving needles and has the best performance. It is also possible to use carbide steel as a material other than diamond.
　金属製の支持棒１１は円筒形の片側側面を平面にした回り止め部１３を有する。支持棒１１の先端部には凹部１５を有し、円柱の軸方向に沿って平面に加工された面１８に断面が平板上に形成されたダイアモンドチップ３１が突き当て支持されている。支持方法としては、実施例では、接着剤を用いて固着する方法を取ったが、その他に形状的加工と合わせて行う方法や、止め具を用いる方法であってもよい。 The metal support rod 11 has a detent portion 13 having a cylindrical one side surface made flat. The support rod 11 has a recess 15 at the tip, and a diamond chip 31 having a cross section formed on a flat plate is abutted and supported on a surface 18 processed into a plane along the axial direction of the cylinder. As a supporting method, in the embodiment, a method of fixing using an adhesive is used, but a method of performing in combination with a shape processing or a method of using a stopper may be used.
　支持棒１１の凹部１５の裏面は、ダイアモンドチップ３１の逃げ面３７Ｌ、３７Ｒに連続する逃げ面１７が加工されており、切りくずが切り刃３５Ｌ、３５Ｒ裏側に停滞しないような構造を取っている。 The back surface of the recess 15 of the support bar 11 has a relief surface 17 that is continuous with the relief surfaces 37L and 37R of the diamond tip 31, and has a structure in which chips do not stagnate behind the cutting edges 35L and 35R. .
　支持棒１１及びダイアモンドチップ３１の大きさの一例として、図１及び図２に各部の寸法を記載した。支持棒１１は直径２ｍｍで、ダイアモンドチップ３１が支持された状態で全長が１０ｍｍである。ダイアモンドチップ３１は、幅１ｍｍ、高さ１．９５ｍｍ、厚さ０．６ｍｍである。支持棒１１及びダイアモンドチップ３１の両方とも、ここにあげた実施例の寸法に限らず、これより大きいサイズであっても、また小さいサイズであっても良い。 As an example of the size of the support rod 11 and the diamond chip 31, the dimensions of each part are shown in FIGS. The support rod 11 has a diameter of 2 mm and a total length of 10 mm with the diamond tip 31 supported. The diamond chip 31 has a width of 1 mm, a height of 1.95 mm, and a thickness of 0.6 mm. Both the support bar 11 and the diamond chip 31 are not limited to the dimensions of the embodiment described here, and may be larger or smaller.
　図２に、ダイアモンドチップ３１が、被彫刻板５１に接している状態の拡大図を示す。図２（Ａ）で示す矢印方向に切削は進行する。切削には、彫刻針１０を動かす方法であってもよいし、被彫刻板５１を動かす方法であってもよい。 FIG. 2 shows an enlarged view of the state in which the diamond chip 31 is in contact with the plate 51 to be engraved. Cutting proceeds in the direction of the arrow shown in FIG. For cutting, a method of moving the engraving needle 10 or a method of moving the plate 51 to be engraved may be used.
　ダイアモンドチップ３１は、その前面３３（図２（Ａ））が被彫刻板に対して、概略垂直に起立しており、そのすくい角α（図１（Ｃ））が５度以下の場合に、切削が正確に行われる。典型的なすくい角としては３度５０分が良い。 The diamond chip 31 has a front surface 33 (FIG. 2 (A)) that stands substantially perpendicular to the plate to be engraved, and the rake angle α (FIG. 1 (C)) is 5 degrees or less. Cutting is performed accurately. A typical rake angle is 3 degrees and 50 minutes.
　彫刻針の先端部は、図１（Ａ）に示すように左側切り刃３５Ｌと右側切り刃３５Ｒの開き角度、すなわちδＲとδＬの合計が１２０度以上の鈍角であり、典型的な例として、δＲが６５度、δＬが６４度４０分と開き角度に一度以内の差がある角度の場合に最も正確に切削が行える。 As shown in FIG. 1 (A), the tip of the engraving needle has an opening angle between the left cutting blade 35L and the right cutting blade 35R, that is, an obtuse angle where the sum of δR and δL is 120 degrees or more. Cutting can be performed most accurately when δR is 65 degrees and δL is 64 degrees and 40 minutes, and there is a difference within one opening angle.
　左右が非対称の場合により正確な切削が行えるのは、以下の理由によると考えられる。ダイアモンドチップ３１は、垂直方向上部から降下してきて被彫刻板５１に接触し、被彫刻板５１に対して図２（Ａ）矢印で示す方向に彫刻針１０が進行することにより、被彫刻板５１の削り取りが開始するが、その際に上記の垂直方向からの左右の開き角度の差があるために、左右の切り刃３５Ｌ、３５Ｒの被彫刻板５１へのあたりに差がある。もしこの差が無く左右の開き角度が全く同じ場合には、先端部接触後に左右両方の刃からの同時に強い力がかかり、刃が被彫刻面にひっかかって紙やプラスチック製の薄板を破いてしまうが、実施例のように左右の開き角度に差を設けることで問題は解消した。 The reason why cutting can be performed more accurately when the left and right sides are asymmetric is considered to be as follows. The diamond chip 31 descends from the upper part in the vertical direction, contacts the plate 51 to be engraved, and the engraving needle 10 advances in the direction indicated by the arrow in FIG. However, since there is a difference between the left and right opening angles from the vertical direction, there is a difference between the left and right cutting blades 35L and 35R around the plate 51 to be engraved. If there is no difference and the left and right opening angles are exactly the same, a strong force is applied from both the left and right blades after contacting the tip, and the blade gets caught on the engraved surface and breaks the paper or plastic sheet. However, the problem was solved by providing a difference in the left and right opening angles as in the example.
　また、逃げ角β（図１（Ｃ））に関しては、先端部の強度を保つために図１（Ｃ）に示すような２０度以上４５度以下の場合、典型的には２５度の場合に先端部に切りくずが留まることなく切削が可能である。また、前記３度５０分のすくい角と前記２５度の逃げ角から６１度１０分の充分な刃先角が得られダイアモンドチップ３１先端部の長寿命化が実現した。 Further, with respect to the clearance angle β (FIG. 1C), in order to maintain the strength of the tip, when the angle is 20 degrees to 45 degrees as shown in FIG. 1C, typically 25 degrees. Cutting is possible without chips remaining at the tip. Further, a sufficient cutting edge angle of 61 degrees and 10 minutes was obtained from the rake angle of 3 degrees and 50 minutes and the clearance angle of 25 degrees, and the life of the tip of the diamond tip 31 was extended.
　本実施例では、ダイアモンドチップ３１の先端部の形状は、図２（Ｂ）に示すように逃げ角βよりやや大きい角度により加工された元加工面３９Ｌ、３９Ｒと、切り刃３５Ｌ、３５Ｒを鋭利にするために前記元加工面の切り刃側を研磨して作成された研磨面３７Ｌ、３７Ｒとからなる。同方法によらず、元加工面３９Ｌ、３９Ｒを残さずに、すべて研磨面とする方法であってもよい。いずれの場合でも前記研磨面３７Ｌ、３７Ｒがダイアモンドチップ３１の逃げ面として働く。 In the present embodiment, as shown in FIG. 2B, the shape of the tip of the diamond tip 31 is such that the original machining surfaces 39L and 39R machined with an angle slightly larger than the clearance angle β and the cutting edges 35L and 35R are sharp. In order to achieve this, it comprises polishing surfaces 37L and 37R created by polishing the cutting edge side of the original processing surface. Regardless of the method, a method may be used in which all the polished surfaces are provided without leaving the original processed surfaces 39L and 39R. In either case, the polishing surfaces 37L and 37R serve as flank surfaces of the diamond tip 31.
　［実施例の効果］
　本発明実施例の彫刻針により、以下のことが可能となった。 [Effect of Example]
The engraving needle of the embodiment of the present invention has enabled the following.
　彫刻針と被彫刻板の相対運動によって走査式に彫刻を行う彫刻装置に使われる彫刻針において、正確な深さ及び幅での被彫刻板、特に紙やプラスチックの薄板における切削が可能となった。 With the engraving needle used in the engraving machine that performs engraving in a scanning manner by the relative movement of the engraving needle and the plate to be engraved, it has become possible to cut the engraved plate with an accurate depth and width, especially a thin plate of paper or plastic. .
　［その他］
　彫刻針という言葉は、実施例の先端のダイアモンドチップ３１部のみを示す場合とダイアモンドチップ３１及び支持棒１１の両方を含めた全体としての彫刻針１０との両方の意味で用いた。 [Others]
The term engraving needle was used to mean both the case where only the diamond tip 31 portion at the tip of the embodiment is shown and the engraving needle 10 as a whole including both the diamond tip 31 and the support rod 11.
符号の説明Explanation of symbols
　１０　彫刻針（チップ部３１と支持棒１１の両方）
　１１　支持棒
　１５　凹部
　１７　支持棒の逃げ面
　３１　ダイアモンドチップ（彫刻針）
　３３　前面
　３５Ｌ、３５Ｒ　切り刃
　３７Ｌ、３７Ｒ　研磨面（逃げ面）
　３９Ｌ、３９Ｒ　元加工面
　α　すくい角
　β　逃げ角
　δＬ　切り刃の左開き角度
　δＲ　切り刃の右開き角度 10 Engraving needle (both tip 31 and support bar 11)
11 Support Rod 15 Recess 17 Support Flank 31 Diamond Tip (Engraving Needle)
33 Front 35L, 35R Cutting edge 37L, 37R Polished surface (flank)
39L, 39R Original machining surface α Rake angle β Relief angle δL Cutting blade left opening angle δR Cutting blade right opening angle

Claims (11)

  1. 　切削方向に対して概略垂直に起立した前面が平坦で、先端部に一対の切り刃を有し、後ろ側に所定の逃げ角の逃げ面を有する
    　ことを特徴とする彫刻針。     An engraving needle characterized by having a flat front surface erected substantially perpendicular to the cutting direction, having a pair of cutting edges at the tip, and a flank with a predetermined clearance angle on the rear side.
  2. 　請求項１の彫刻針であって、
    　前記彫刻針は、切削方向に対して概略垂直に起立した支持棒の先端部に支持された
    　ことを特徴とする彫刻針。     The engraving needle of claim 1,
    The engraving needle is supported by a tip portion of a support bar that stands up substantially perpendicular to the cutting direction.
  3. 　請求項１または２の彫刻針であって、
    　前記支持棒は先端部に凹部を有し、該凹部に前記彫刻針を支持した
    　ことを特徴とする彫刻針。     The engraving needle according to claim 1 or 2,
    The support rod has a recess at a tip, and the engraving needle is supported in the recess.
  4. 　請求項１から３のいずれかの彫刻針であって、
    　前記支持棒は、円柱の軸方向に沿って一部を平面にした回り止め部を有する
    　ことを特徴とする彫刻針。     The engraving needle according to any one of claims 1 to 3,
    The support rod has a detent portion having a part made flat along the axial direction of the cylinder.
  5. 　請求項１から４のいずれかの彫刻針であって、
    　前記支持棒は、前記彫刻針の逃げ面に連続する逃げ面を有する
    　ことを特徴とする彫刻針。     The engraving needle according to any one of claims 1 to 4,
    The support rod has a flank that is continuous with the flank of the engraving needle.
  6. 　請求項１から５のいずれかの彫刻針であって、
    　前記彫刻針の切り刃の開き角度が１２０度以上の鈍角である
    　ことを特徴とする彫刻針。     The engraving needle according to any one of claims 1 to 5,
    The engraving needle characterized in that the opening angle of the cutting blade of the engraving needle is an obtuse angle of 120 degrees or more.
  7. 　請求項１から６のいずれかの彫刻針であって、
    　前記彫刻針のすくい角が５度以下の鋭角である
    　ことを特徴とする彫刻針。     The engraving needle according to any one of claims 1 to 6,
    The engraving needle characterized in that the rake angle of the engraving needle is an acute angle of 5 degrees or less.
  8. 　請求項１から７のいずれかの彫刻針であって、
    　前記彫刻針の逃げ角が２０度から４５度の範囲である
    　ことを特徴とする彫刻針。     The engraving needle according to any one of claims 1 to 7,
    The relief angle of the engraving needle is in the range of 20 degrees to 45 degrees.
  9. 　請求項１から８のいずれかの彫刻針であって、
    　前記彫刻針の切り刃の開き角度が左右非対称である
    　ことを特徴とする彫刻針。     The engraving needle according to any one of claims 1 to 8,
    The engraving needle characterized in that the opening angle of the cutting blade of the engraving needle is asymmetric.
  10. 　請求項９の彫刻針であって、
    　前記彫刻針の左右の開き角度の差が１度以内である
    　ことを特徴とする彫刻針。     The engraving needle of claim 9,
    The difference between the left and right opening angles of the engraving needle is within 1 degree.
  11. 　請求項１から１０のいずれかの彫刻針であって、
    　前記彫刻針はダイアモンド製または超硬鋼製である
    　ことを特徴とする彫刻針。     The engraving needle according to any one of claims 1 to 10,
    The engraving needle is made of diamond or cemented carbide.
PCT/JP2009/001307 2009-03-24 2009-03-24 Engraving needle WO2010109519A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2009/001307 WO2010109519A1 (en) 2009-03-24 2009-03-24 Engraving needle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2009/001307 WO2010109519A1 (en) 2009-03-24 2009-03-24 Engraving needle

Publications (1)

Publication Number Publication Date
WO2010109519A1 true WO2010109519A1 (en) 2010-09-30

Family

ID=42780234

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2009/001307 WO2010109519A1 (en) 2009-03-24 2009-03-24 Engraving needle

Country Status (1)

Country Link
WO (1) WO2010109519A1 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54129598A (en) * 1978-03-31 1979-10-08 Ogura Jewel Industry Co Ltd Diamond cutting needle
JPH11291437A (en) * 1998-04-13 1999-10-26 Deiakkusu:Kk Diamond stylus

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54129598A (en) * 1978-03-31 1979-10-08 Ogura Jewel Industry Co Ltd Diamond cutting needle
JPH11291437A (en) * 1998-04-13 1999-10-26 Deiakkusu:Kk Diamond stylus

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