IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0761321
(2007-06-11)
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등록번호 |
US-7452146
(2008-11-18)
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발명자
/ 주소 |
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출원인 / 주소 |
|
대리인 / 주소 |
Marshall, Gerstein & Borun LLP
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인용정보 |
피인용 횟수 :
4 인용 특허 :
81 |
초록
▼
Improved eradicating fluids and eradicable inks are disclosed. A color changing eradicating fluid is disclosed which includes a volatile base, a pH sensitive dye and an eradicating agent whereby the dye changes color as the volatile base evaporates thereby provided a visual indication to the user wh
Improved eradicating fluids and eradicable inks are disclosed. A color changing eradicating fluid is disclosed which includes a volatile base, a pH sensitive dye and an eradicating agent whereby the dye changes color as the volatile base evaporates thereby provided a visual indication to the user when the eradicating fluid is sufficiently dry and ready to receive a corrected marking. A non-color changing eradicating fluid having a more moderate pH is also disclosed. The combination eradicable and re-write ink is disclosed which features phosphoric acid (or phosphorus pentoxide in solution) along with an eradicable dye. A combination writing and correction instrument that combines a disclosed eradicating fluid and a combination eradicable and re-write ink is also disclosed.
대표청구항
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What is claimed is: 1. A writing instrument comprising: a first reservoir containing an ink eradicator, the first reservoir being in fluid communication with a first applicator tip, the ink eradicator comprising a volatile base, a pH sensitive dye and an eradicating agent, wherein the pH sensitive
What is claimed is: 1. A writing instrument comprising: a first reservoir containing an ink eradicator, the first reservoir being in fluid communication with a first applicator tip, the ink eradicator comprising a volatile base, a pH sensitive dye and an eradicating agent, wherein the pH sensitive dye changes color as the volatile base evaporates; a second reservoir containing an eradicable ink, the second reservoir being in fluid communication with a second applicator tip, the eradicable ink comprising an eradicable dye; a third reservoir containing a rewrite ink, the third reservoir being in fluid communication with a third applicator tip, the re-write ink comprising one or both of phosphorus pentoxide (P4O10) and phosphoric acid (H3PO4), and further comprising a dye. 2. The writing instrument of claim 1, the ink eradicator further comprising a stabilizer selected from the group consisting of sodium perborate (BNaO3), ethylenediaminetetraacetic acid (EDTA), and mixtures thereof. 3. The writing instrument of claim 1, wherein the pH sensitive dye of The ink eradicator is selected from the group consisting of o-cresolphthalein, thymolphthalein, phenolphthalein, and mixtures thereof. 4. The writing instrument of claim 1, wherein the volatile base of the ink eradicator is selected from the group consisting of 2-amino-2-methyl-1-propanol (AMP) and monoethylamine (MEA). 5. The writing instrument of claim 1, wherein the ink eradicator has a pH of greater than 10. 6. The writing instrument of claim 1, wherein the re-write ink has a viscosity in the range of about 1 cP to about 3 cP and has a pH ranging from about 2 to about 3. 7. The writing instrument of claim 1, wherein the re-write ink is a ball pen ink having a viscosity in the range of about 1 kcP to about 3 kcP and has a pH ranging from about 2 to about 3. 8. A writing instrument comprising: a first reservoir containing an ink eradicator, the first reservoir being in fluid communication with a first applicator tip, the ink eradicator comprising an eradicating agent, an optional base, and a stabilizer selected from the group consisting of sodium perborate (BNaO3), ethylenediaminetetraacetic acid (EDTA), and mixtures thereof; a second reservoir containing an eradicable ink, the second reservoir being in fluid communication with a second applicator tip, the eradicable ink comprising an eradicable dye; a third reservoir containing a re-write ink, the third reservoir being in fluid communication with a third applicator tip, the re-write ink comprising one or both of phosphorus pentoxide (P4O10) and phosphoric acid (H3PO4), and further comprising a dye. 9. The writing instrument of claim 8, wherein the ink eradicator has a pH of ranging from about 7 to less than 10. 10. The writing instrument of claim 8, wherein the re-write ink has a viscosity in the range of about 1 cP to about 3 cP and has a pH ranging from about 2 to about 3. 11. The writing instrument of claim 8, wherein the re-write ink is a ball pen ink having a viscosity in the range of about 1 kcP to about 3 kcP and has a pH ranging from about 2 to about 3.
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