JPS63108797U - - Google Patents
Info
- Publication number
- JPS63108797U JPS63108797U JP39387U JP39387U JPS63108797U JP S63108797 U JPS63108797 U JP S63108797U JP 39387 U JP39387 U JP 39387U JP 39387 U JP39387 U JP 39387U JP S63108797 U JPS63108797 U JP S63108797U
- Authority
- JP
- Japan
- Prior art keywords
- blackboard
- utility
- model registration
- electret sheet
- charge density
- 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.)
- Pending
Links
- 239000000835 fiber Substances 0.000 claims 1
- 239000010410 layer Substances 0.000 claims 1
- 239000002344 surface layer Substances 0.000 claims 1
- 239000002184 metal Substances 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
- 238000001739 density measurement Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Landscapes
- Drawing Aids And Blackboards (AREA)
Description
第１図は本考案に係る黒板拭きの実施態様例を
あらわす斜視図、第２図は第１図の黒板拭きのＡ
―Ａ′線に沿つた横断面図、第３図は本考案に係
る黒板拭きの他の実施態様例をあらわす横断面図
、第４図は本考案に係る黒板拭きのさらに他の実
施態様例をあらわす横断面図、第５図は表面電荷
密度測定法の説明図である。
１：黒板拭き、２：エレクトレツトシート、３
：外枠、４：弾性体材料、５：表層材、６：アー
スされた金属板電極、７：試料（エレクトレツト
シート）、８：他金属板電極、９：既知コンデン
サー、１０：電圧計。
FIG. 1 is a perspective view showing an embodiment of the blackboard wiping device according to the present invention, and FIG. 2 is an A of the blackboard wiping device shown in FIG. 1.
- A cross-sectional view taken along line A', FIG. 3 is a cross-sectional view showing another embodiment of the blackboard wiper according to the present invention, and FIG. 4 is still another embodiment of the blackboard wiper according to the present invention. FIG. 5 is an explanatory diagram of the surface charge density measurement method. 1: Blackboard wipe, 2: Electret sheet, 3
: Outer frame, 4: Elastic material, 5: Surface material, 6: Grounded metal plate electrode, 7: Sample (electret sheet), 8: Other metal plate electrode, 9: Known capacitor, 10: Voltmeter.
Claims (1)
は内層に介在させてなる黒板拭き。 (2) エレクトレツトシートの表面電荷密度が、
７×１０−１１クーロン／cm2以上である実用新
案登録請求の範囲第(1)項に記載の黒板拭き。 (3) エレクトレツトシートが繊維で構成されて
いる実用新案登録請求の範囲第(1)項に記載の黒
板拭き。[Scope of Claim for Utility Model Registration] (1) A blackboard wiper comprising an electret sheet interposed in the surface layer and/or inner layer. (2) The surface charge density of the electret sheet is
The blackboard wipe according to claim (1) of the utility model registration claim, which has a temperature of 7×10 −11 coulombs/cm 2 or more. (3) The blackboard wiper according to claim (1) of the utility model registration claim, wherein the electret sheet is composed of fibers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP39387U JPS63108797U (en) | 1987-01-06 | 1987-01-06 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP39387U JPS63108797U (en) | 1987-01-06 | 1987-01-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63108797U true JPS63108797U (en) | 1988-07-13 |
Family
ID=30777325
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP39387U Pending JPS63108797U (en) | 1987-01-06 | 1987-01-06 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63108797U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5838499B2 (en) * | 1976-06-16 | 1983-08-23 | 新日本製鐵株式会社 | Electroslag smelting method of nickel oxide ore |
-
1987
- 1987-01-06 JP JP39387U patent/JPS63108797U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5838499B2 (en) * | 1976-06-16 | 1983-08-23 | 新日本製鐵株式会社 | Electroslag smelting method of nickel oxide ore |
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