JP2625539B2 - Key Top Manufacturing Method - Google Patents
Key Top Manufacturing MethodInfo
- Publication number
- JP2625539B2 JP2625539B2 JP1025911A JP2591189A JP2625539B2 JP 2625539 B2 JP2625539 B2 JP 2625539B2 JP 1025911 A JP1025911 A JP 1025911A JP 2591189 A JP2591189 A JP 2591189A JP 2625539 B2 JP2625539 B2 JP 2625539B2
- Authority
- JP
- Japan
- Prior art keywords
- key top
- stamping member
- overcoat layer
- top body
- top surface
- 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 - Lifetime
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2209/00—Layers
- H01H2209/016—Protection layer, e.g. for legend, anti-scratch
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2229/00—Manufacturing
- H01H2229/006—Pad transfer printing
Landscapes
- Manufacture Of Switches (AREA)
- Push-Button Switches (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、パーソナルンコンピユータ等のキーボード
に使用されるキートツプの製造方法に係り、特に、所望
の表示部がパツド印刷と呼ばれる印刷方式によって形成
されるキートツプの製造方法に関する。Description: BACKGROUND OF THE INVENTION The present invention relates to a method of manufacturing a key top used for a keyboard of a personal computer or the like, and more particularly, to a method of forming a desired display portion by a printing method called pad printing. The present invention relates to a method for manufacturing a key top.
通常この種のキートツプの上面には、文字,図形,記
号等が表示されているが、オペレータは指でキートツプ
の上面を押圧してこれを操作するようになつているた
め、上記表示部が摩擦によつて消え易いという問題があ
る。そこで、耐摩耗性の高い表示部を目的として、従来
より表示部をオーバーコート層で被覆するようにしたキ
ートツプが知られている。Usually, characters, figures, symbols, and the like are displayed on the upper surface of this type of key top, but the operator presses the upper surface of the key top with a finger to operate the key top. Therefore, there is a problem that it easily disappears. Therefore, there has been known a key top in which the display unit is covered with an overcoat layer for the purpose of a display unit having high wear resistance.
かかるキートツプのオーバーコーティング方法として
は、表示部を印刷したキートツプの上面に紫外線硬化樹
脂を噴霧するスプレー法や、シリコンゴム等の押印部材
を用いて紫外線硬化樹脂を表示部に転写するパツド印刷
法等が知られているが、前者のスプレー法は歩留まりや
仕上がり外観に難点があるため、後者のパツド印刷法が
近年着目されており、特に多種類少量生産の場合に広く
採用されている。As a method of overcoating the key top, a spray method of spraying an ultraviolet curable resin on the upper surface of the key top on which the display unit is printed, a pad printing method of transferring the ultraviolet curable resin to the display unit by using a stamping member such as silicon rubber, or the like. However, the former spray method has drawbacks in yield and finished appearance, so the pad printing method of the latter has attracted attention in recent years, and is particularly widely used in the case of small-lot production of many types.
第7図および第8図は本出願人が特開昭63−4509号公
報において提案した従来のパツド印刷法を説明するもの
で、第7図(A)〜(G)は紫外線硬化樹脂の転写工程
を示す説明図、第8図は転写工程終了後のキートツプを
示す平面図である。FIGS. 7 and 8 illustrate a conventional pad printing method proposed by the present applicant in Japanese Patent Application Laid-Open No. 63-4509, and FIGS. 7A to 7G show the transfer of an ultraviolet curable resin. FIG. 8 is a plan view showing a key top after the transfer step is completed.
第8図において、6はキートツプ本体を示し、該キー
トツプ本体6の天面には所望の表示部(例えば図示した
アルフアベツトのA)がパツド印刷によつて形成されて
おり、該表示部の上面にはそれと同形状の紫外線硬化樹
脂3がパツド印刷によりオーバーコートされている。こ
のオーバーコート層の形成工程を第7図について説明す
ると、まず、同図(A)に示すエツチング版1のエツチ
ング溝に、同図(B)に示すように紫外線硬化樹脂3を
充填する。このエッチング溝2は前述したキートツプ本
体6の表示部と同形状である。次いで、同図(C),
(D)に示すように、シリコンゴム製の押印部材5を紫
外線硬化樹脂3に接触させ、押印部材5の下面に紫外線
硬化樹脂3を吸着する。次いで、同図(E)に示すよう
に、前記押印部材5の真下にすでにパツド印刷により表
示部4を形成したキートツプ本体6を配置し、この表示
部4に押印部材5を押し付けることにより、表示部4の
上面に紫外線硬化樹脂3を転写形成する。最後に同図
(G)に示すように、紫外線硬化樹脂3に紫外線ランプ
7からの紫外線を照射することにより、第8図に示した
キートツプ本体6を得る。In FIG. 8, reference numeral 6 denotes a key top main body, and a desired display portion (for example, an alphabet A shown in the drawing) is formed on the top surface of the key top main body 6 by pad printing. Is overcoated by pad printing with an ultraviolet curable resin 3 of the same shape. The overcoat layer forming step will be described with reference to FIG. 7. First, the ultraviolet curing resin 3 is filled in the etching groove of the etching plate 1 shown in FIG. 7A as shown in FIG. This etching groove 2 has the same shape as the display section of the key top body 6 described above. Next, FIG.
As shown in (D), the stamping member 5 made of silicone rubber is brought into contact with the ultraviolet curing resin 3, and the ultraviolet curing resin 3 is adsorbed on the lower surface of the stamping member 5. Next, as shown in FIG. 2E, a key top body 6 having a display section 4 already formed by pad printing is disposed immediately below the stamping member 5, and the stamping member 5 is pressed against the display section 4 to display the image. The ultraviolet curing resin 3 is transferred and formed on the upper surface of the portion 4. Finally, as shown in FIG. 8G, the ultraviolet curing resin 3 is irradiated with ultraviolet rays from an ultraviolet lamp 7 to obtain the key top body 6 shown in FIG.
ところで、前述した従来の製造方法にあつては、押印
部材5の下面の曲率をキートツプ本体6の天面の曲率に
比べて充分に小さく設定し、これにより、押印部材5を
キートツプ本体6に押し付ける際〔第7図(E)の工
程〕の空気の巻き込みを防止していた。しかし、このよ
うにすると、転写後に押印部材5をキートツプ本体6の
天面から離間する際〔第7図(F)の工程〕に、紫外線
硬化樹脂3が押印部材5に引つ張られ、オーバーコート
層(紫外線硬化樹脂3)にしわが発生し易くなるという
問題がある。このしわは、紫外線硬化樹脂3の転写面積
が広くなるほど顕著になるため、例えば、紫外線硬化樹
脂3を表示部4を含めてキートツプ本体6の天面全域に
形成しようとすると、オーバーコート層の膜厚が不均一
になり、品位が著しく低下するという問題がある。By the way, in the above-mentioned conventional manufacturing method, the curvature of the lower surface of the sealing member 5 is set to be sufficiently smaller than the curvature of the top surface of the key top body 6, thereby pressing the sealing member 5 against the key top body 6. At this time, the entrapment of air in the [step of FIG. 7 (E)] was prevented. However, in this case, when the stamping member 5 is separated from the top surface of the key top body 6 after the transfer (step of FIG. 7 (F)), the ultraviolet-curing resin 3 is pulled by the stamping member 5, and There is a problem that wrinkles are easily generated in the coat layer (ultraviolet curable resin 3). Since the wrinkles become more remarkable as the transfer area of the ultraviolet curable resin 3 increases, for example, when the ultraviolet curable resin 3 is formed on the entire top surface of the key top body 6 including the display section 4, the film of the overcoat layer is formed. There is a problem that the thickness becomes non-uniform and the quality is remarkably reduced.
したがつて本発明の目的は、上記従来技術の課題を解
消し、オーバーコート層をキートツプ本体の天面に均一
の膜厚にて形成でき、高品位のキートツプを提供するこ
とにある。SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to solve the above-mentioned problems of the prior art, and to provide a high-quality key top in which an overcoat layer can be formed with a uniform thickness on the top surface of the key top body.
上記目的を達成するために、本発明は、キートツプ本
体に表示部を印刷した後、この表示面に軟質材料からな
る押印部材を押し付けてオーバーコート層を転写形成す
るキートツプの製造方法において、前記キートツプ本体
の軸線を前記押印部材の押し付け方向に対して傾斜せし
めると共に、この押印部材を前記キートツプ本体に対し
位置ずれさせて複数回転写することにより、前記オーバ
ーコート層を形成することを特徴とするものである。In order to achieve the above object, the present invention relates to a key top manufacturing method for printing a display on a key top main body, and then pressing a stamping member made of a soft material onto the display surface to transfer and form an overcoat layer. The overcoat layer is formed by inclining the axis of the main body with respect to the pressing direction of the stamping member, and displacing the stamping member with respect to the key top body and transferring the stamp plural times, thereby forming the overcoat layer. It is.
本発明に係るキートツプの製造方法によれば、キート
ツプ本体の軸線を押印部材の押し付け方向に対して傾斜
せしめたため、押印部材はキートツプ本体の天面を擦る
ようにしてこれと当接し、空気の巻き込みは防止され
る。また、オーバーコート層を複数回の転写により形成
すると共に、押印部材とキートツプ本体の相対位置をず
らしてこれらの転写を行うようにしたため、押印部材を
キートツプ本体から引き離す際に生じるコーテイング用
樹脂のかたよりが分散され、均一膜のオーバーコート層
が得られる。According to the manufacturing method of the key top according to the present invention, the axis of the key top body is inclined with respect to the pressing direction of the sealing member. Is prevented. In addition, since the overcoat layer is formed by a plurality of transfers and the transfer is performed by shifting the relative position of the stamping member and the key top body, the coating resin generated when the sealing member is separated from the key top body is formed. Are dispersed, and an overcoat layer of a uniform film is obtained.
以下、本発明の実施例を図面に基づいて説明する。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
第1図は本発明の一実施例で使用される押印部材とキ
ートツプ本体を示す斜視図であり、同図に示すように、
シリコンゴム等の軟質材料からなる押印部材8の下面に
は湾曲面8aが形成されており、キートツプ本体9の天面
9aも湾曲している。前記押印部材8の湾曲面8aはキート
ツプ本体9の天面9aより幾分広めに形成されており、ま
た第2図に示すように、これら湾曲面8aと天面9aの曲率
半径はR1=18mm,R2=22mmで、本実施例の場合、押印部
材8の湾曲面8aの曲率がキートツプ本体9の天面9aの曲
率にかなり近づくよう設定されている。FIG. 1 is a perspective view showing a stamping member and a key top body used in an embodiment of the present invention. As shown in FIG.
A curved surface 8a is formed on the lower surface of the stamping member 8 made of a soft material such as silicon rubber, and the top surface of the key top body 9 is formed.
9a is also curved. The curved surface 8a of the stamping member 8 is formed to be slightly wider than the top surface 9a of the key top body 9, and as shown in FIG. 2, the radius of curvature of the curved surface 8a and the top surface 9a is R 1 = In the case of this embodiment, 18 mm, R 2 = 22 mm, the curvature of the curved surface 8 a of the sealing member 8 is set so as to be very close to the curvature of the top surface 9 a of the key top body 9.
次に、前記押印部材を用いてキートツプ本体9の天面
9a上にオーバーコート層を形成する工程を説明する。Next, the top surface of the key top body 9 is
The step of forming an overcoat layer on 9a will be described.
まず、前記キートツプ本体9の天面9aに所望の表示部
(本実施例の場合アルフアベツトのA)10を印刷する。
この工程は公知のパツド印刷法、すなわちエッチング溝
に充填したインクを軟質の押印部材(図示せず)を介し
て天面9aに転写する印刷法により行われる。First, a desired display (A in this embodiment, an alphabet A) 10 is printed on the top surface 9a of the key top body 9.
This step is performed by a known pad printing method, that is, a printing method in which the ink filled in the etching groove is transferred to the top surface 9a via a soft stamping member (not shown).
次に、このように表示部10を印刷したキートツプ本体
9の天面9a全域に、前記押印部材8を用いてオーバーコ
ート層を形成する。この場合、押印部材8の軸線αとキ
ートツプ本体9の軸線βとを第3図に示すように所定角
度θ(本実施例の場合θ=6゜)傾けると共に、押印部
材8を第6図(a)に示すようにキートツプ本体9の左
側にオフセツトし、この状態でオーバーコート層をパツ
ド印刷する。Next, an overcoat layer is formed on the entire top surface 9a of the key top body 9 on which the display unit 10 is printed by using the stamping member 8. In this case, the axis α of the stamping member 8 and the axis β of the key top body 9 are inclined at a predetermined angle θ (θ = 6 ° in the present embodiment) as shown in FIG. As shown in a), the offset is offset to the left side of the key top body 9, and the overcoat layer is pad-printed in this state.
第4図および第5図はかかるパツド印刷工程をそれぞ
れキートツプ本体9の正面および右側面からみた説明図
であり、まず、図示省略したエツチング版を用いて押印
部材8の湾曲面8aに紫外線硬化樹脂11を吸着させた後、
この押印部材8を第4,5図(a)に示すように軸線方向
へ下降し、第4,5図(b)に示すように湾曲面8aをキー
トツプ本体9の天面9aに押し付ける。この際、天面9aが
湾曲面8aに対して傾斜するようにキートツプ本体9を配
置してあるため、湾曲面8aは天面9a上を後部から前部
(第3図の右から左)へと擦るように当接する。したが
つて、本実施例のように湾曲面8aの曲率を天面9aに近づ
けたとしても、紫外線硬化樹脂11と天面9a間に空気が巻
き込まれる虞れはほとんどない。その後、押印部材8を
第4,5図(c)に示すように上昇し、紫外線硬化樹脂11
を表示部10を含む天面9aの全域に所定厚、例えば7μm
程度転写する。この際、天面9aよりも曲率の小さい湾曲
面8aは、第4図(c)の左右両端側から中心に向かつて
順次離間するが、本実施例の場合、湾曲面8aの曲率を天
面9aの曲率に近づけてあるため、紫外線硬化樹脂11が天
面9aから最後に離れる湾曲面8aの中心部に引つ張られる
量は少なくなり、それに起因するしわの発生はほとんど
なくなる。なお、このようにして発生する僅かなしわ
は、第6図(a)に示すように、押印部材8の中心をキ
ートツプ本体9に対して左方へオフセツトしてあるた
め、天面9aの中心よりも左側に位置する。4 and 5 are explanatory views of the pad printing process as viewed from the front and right sides of the key top body 9, respectively. First, an ultraviolet-curing resin is applied to the curved surface 8a of the stamping member 8 using an etching plate not shown. After adsorbing 11,
The stamping member 8 is lowered in the axial direction as shown in FIGS. 4 and 5 (a), and the curved surface 8a is pressed against the top surface 9a of the key top body 9 as shown in FIGS. 4 and 5 (b). At this time, the key top body 9 is arranged so that the top surface 9a is inclined with respect to the curved surface 8a, so that the curved surface 8a moves from the rear to the front (right to left in FIG. 3) on the top surface 9a. Abut to rub. Therefore, even if the curvature of the curved surface 8a is made closer to the top surface 9a as in the present embodiment, there is almost no risk that air will be trapped between the ultraviolet curable resin 11 and the top surface 9a. Thereafter, the sealing member 8 is raised as shown in FIGS.
A predetermined thickness, for example, 7 μm, over the entire area of the top surface 9a including the display unit 10.
Transfer to the extent. At this time, the curved surface 8a having a smaller curvature than the top surface 9a is sequentially separated from the left and right ends of FIG. 4 (c) toward the center, but in the present embodiment, the curvature of the curved surface 8a is changed to the top surface. Since the curvature is close to the curvature of 9a, the amount of the ultraviolet curable resin 11 being pulled to the center of the curved surface 8a which is finally separated from the top surface 9a is reduced, and the generation of wrinkles due to this is almost eliminated. The slight wrinkles generated in this way are offset from the center of the sealing member 8 to the left with respect to the key top body 9 as shown in FIG. It is located on the left side.
前述の如く紫外線硬化樹脂11をキートツプ本体9の天
面9a上に転写したなら、第6図(b)に示すように、押
印部材8の中心をキートツプ本体9の右方へオフセツト
し、この状態で第1回目と同様のパツド印刷を繰り返し
て第2回目の転写を行う。これにより約14μm厚のオー
バーコート層が形成されるが、第2回目の転写で紫外線
硬化樹脂11に発生する僅かなしわは、天面9aの中心より
も右側に位置する。When the ultraviolet curing resin 11 is transferred onto the top surface 9a of the key top body 9 as described above, the center of the stamping member 8 is offset to the right of the key top body 9 as shown in FIG. Then, pad printing similar to that of the first transfer is repeated to perform the second transfer. As a result, an overcoat layer having a thickness of about 14 μm is formed, but a slight wrinkle generated in the ultraviolet curable resin 11 in the second transfer is located on the right side of the center of the top surface 9a.
しかる後、第6図(c)に示すように、押印部材8の
中心を天面9aの中心と一致させ、この状態で第1回およ
び第2回目と同様のパツド印刷を繰り返して、最終的に
20μm厚程度のオーバーコート層を形成する。この際、
第1および第2回目の工程で発生した前記しわは、第3
回目の工程で天面9aに押し付けられる押印部材8の湾曲
部8aによつて均され、膜厚の均一なオーバーコート層が
形成される。Thereafter, as shown in FIG. 6 (c), the center of the stamping member 8 is made to coincide with the center of the top surface 9a, and in this state, the same pad printing as the first and second times is repeated, and finally, To
An overcoat layer having a thickness of about 20 μm is formed. On this occasion,
The wrinkles generated in the first and second steps are the third wrinkles.
The overcoat layer having a uniform thickness is formed by the curved portion 8a of the stamping member 8 pressed against the top surface 9a in the third step.
そして、最後に、図示省略した紫外線ランプを用いて
紫外線硬化樹脂11を硬化し、表示部10を含めて天面9aの
全域にオーバーコート層を形成したキートツプ本体9を
得る。Finally, the ultraviolet curable resin 11 is cured by using an ultraviolet lamp (not shown) to obtain the key top body 9 having the overcoat layer formed on the entire top surface 9a including the display section 10.
このように、上記実施例によれば、表示部10とオーバ
ーコート層(紫外線硬化樹脂11)を共にパツド印刷法に
よつて形成できるため、材料の歩留まりや品質を向上さ
せることができる。また、オーバーコート層をキートツ
プ本体9の天面全域に均一膜に形成できるため、耐摩耗
性が高く高品位の表示部を提供できる。As described above, according to the above embodiment, both the display section 10 and the overcoat layer (ultraviolet curable resin 11) can be formed by the pad printing method, so that the yield and quality of the material can be improved. In addition, since the overcoat layer can be formed as a uniform film over the entire top surface of the key top body 9, a high-quality display unit having high wear resistance can be provided.
以上説明したように、本発明によれば、空気の巻き込
みやしわの発生を抑えてキートツプ本体の天面全域にオ
ーバーコート層を形成できるため、高品位のキートツプ
を安価に提供することができる。As described above, according to the present invention, the overcoat layer can be formed on the entire top surface of the key top body while suppressing the entrainment of air and wrinkles, so that a high quality key top can be provided at low cost.
第1図ないし第6図は本発明の一実施例を説明するもの
で、第1図は押印部材とキートツプ本体の斜視図、第2
図は押印部材とキートツプ本体の曲率を示す説明図、第
3図は押印部材とキートツプ本体の傾斜状態を示す説明
図、第4図、第5図および第6図はオーバーコート層の
パツド印刷工程を示す説明図、第7図は従来のオーバー
コート層のパツド印刷工程を示す説明図、第8図はキー
トツプ本体の平面図である。 8……押印部材、8a……湾曲面、9……キートツプ本
体、9a……天面、10……表示部、11……紫外線硬化樹
脂。1 to 6 illustrate an embodiment of the present invention. FIG. 1 is a perspective view of a stamping member and a key top body, and FIG.
FIG. 3 is an explanatory view showing the curvature of the stamping member and the key top body, FIG. 3 is an explanatory view showing the inclined state of the stamping member and the key top body, and FIGS. 4, 5, and 6 are pad printing steps of the overcoat layer. FIG. 7 is an explanatory view showing a conventional pad printing process of an overcoat layer, and FIG. 8 is a plan view of a key top body. 8 ... stamping member, 8a ... curved surface, 9 ... key top body, 9a ... top surface, 10 ... display unit, 11 ... ultraviolet curable resin.
Claims (1)
の表示面に軟質材料からなる押印部材を押し付けてオー
バーコート層を転写形成するキートツプの製造方法にお
いて、前記キートツプ本体の軸線を前記押印部材の押し
付け方向に対して傾斜せしめると共に、この押印部材を
前記キートツプ本体に対し位置ずれさせて複数回転写す
ることにより、前記オーバーコート層を形成することを
特徴とするキートツプの製造方法。2. A method for manufacturing a key top, comprising: printing a display portion on a key top body; and pressing a stamping member made of a soft material onto the display surface to transfer and form an overcoat layer, wherein the axis of the key top body is aligned with the stamping member. Forming the overcoat layer by inclining the stamping member with respect to the pressing direction and transferring the stamping member a plurality of times while displacing the stamping member with respect to the keytop main body.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1025911A JP2625539B2 (en) | 1989-02-06 | 1989-02-06 | Key Top Manufacturing Method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1025911A JP2625539B2 (en) | 1989-02-06 | 1989-02-06 | Key Top Manufacturing Method |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH02207428A JPH02207428A (en) | 1990-08-17 |
JP2625539B2 true JP2625539B2 (en) | 1997-07-02 |
Family
ID=12178961
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1025911A Expired - Lifetime JP2625539B2 (en) | 1989-02-06 | 1989-02-06 | Key Top Manufacturing Method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2625539B2 (en) |
-
1989
- 1989-02-06 JP JP1025911A patent/JP2625539B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH02207428A (en) | 1990-08-17 |
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