US5686508A
Expired / Lapsed
US
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Ink and ink jet recording method and apparatus using the same
Assignee: Canon Inc
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Filing: 1994-11-03
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Granted: 1997-11-11
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Expires: 2014-11-03
Abstract
Abstract An object of the present invention is to provide an ink, and ink jet recording method and apparatus using the ink which has excellent dispersion stability, discharge stability and recovery properties, and which can be kept in the weak alkali region even if it contains carbon black with low pH, which is generally considered to be difficult to handle and which can obtain a high-density image. The ink contains acid carbon black having a volatile content within the range 3.5 to 8% by weight, and a water-soluble resin having a weight average molecular weight within the range of 3,000 to 30,000, both of which are dissolved in an aqueous liquid medium, and a compound represented by the following formula (I), wherein the ratio by weight between the acid carbon black and the water-soluble resin is within the range of 3:1 to 10:1. R.sub.1 R.sub.2 NCONHCH.sub.2 CH.sub.2 OH (I) wherein R 1 and R 2 each is hydrogen or C n H 2n OH, n is 2 or 3, with the proviso that R 1 and R 2 are not simultaneously hydrogen.
Inventors
- 👤 Masako Shimomura
- 👤 Hiromichi Noguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:15
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/30; C09D11/32; C09D11/324; Y; Y10; Y10S; Y10S260/00; Y10S260/38
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
123 words
An ink comprising (1) acid carbon black having a volatile content within the range of 3.5 to 8% by weight and (2) a water-soluble resin having a weight average molecular weight within the range of 3,000 to 30,000, wherein (1) and (2) are dissolved in an aqueous liquid medium, and (3) a compound represented by the following formula (I), wherein the ratio by weight between the contents of said acid carbon black and said water-soluble resin is within the range of 3:1 to 10:1; R.sub.1 R.sub.2 NCONHCH.sub.2 CH.sub.2 OH (I) wherein R 1 and R 2 each is hydrogen or C n H 2n OH, n is 2 or 3, with the proviso that R 1 and R 2 are not simultaneously hydrogen.
Claim 2
Dependent Claim
123 words
An ink comprising (1) acid carbon black having a volatile content within the range of 3.5 to 8% by weight and (2) a water-soluble resin having a weight average molecular weight within the range of 3,000 to 30,000, wherein (1) and (2) are dissolved in an aqueous liquid medium, and (3) a compound represented by the following formula (I), wherein the ratio by weight between the contents of said acid carbon black and said water-soluble resin is within the range of 3:1 to 10:1; R.sub.1 R.sub.2 NCONHCH.sub.2 CH.sub.2 OH (I) wherein R 1 and R 2 each is hydrogen or C n H 2n OH, n is 2 or 3, with the proviso that R 1 and R 2 are not simultaneously hydrogen.
Claim 3
Dependent Claim
17 words
An ink according to claim 1, wherein said acid carbon black has pH of 5 or less.
Claim 4
Dependent Claim
22 words
An ink according to claim 1, wherein said water-soluble resin has a weight-average molecular weight within the range of 5,000 to 15,000.
Claim 5
Dependent Claim
31 words
An ink according to claim 1, wherein the ratio by weight between the contents of said acid carbon black and said water-soluble resin is within the range of 10:3 to 10:1.
Claim 6
Dependent Claim
23 words
An ink according to claim 1, wherein said carbon black has a volatile content within the range of 4.5 to 6.0% by weight.
Claim 7
Dependent Claim
32 words
An ink according to claim 1, wherein the amount of the water-soluble resin dissolved in said liquid medium is 2% or less by weight based on the total weight of the ink.
Claim 8
Dependent Claim
32 words
An ink according to claim 1, wherein the amount of the water-soluble resin dissolved in said liquid medium is 1% or less by weight based on the total weight of the ink.
Claim 9
Dependent Claim
17 words
An ink according to claim 1, wherein a compound represented by said formula (I) is 1,3-bis-(βhydroxyethyl) urea.
Claim 10
Dependent Claim
17 words
An ink according to claim 1, wherein said aqueous liquid medium contains water and an organic solvent.
Claim 11
Dependent Claim
34 words
An ink according to claim 1, wherein said aqueous liquid medium contains at least one organic solvent selected from methanol, ethanol, n-propyl alcohol, isopropyl alcohol, n-butyl alcohol, sec-butyl alcohol, tert-butyl alcohol, and isobutyl alcohol.
Claim 12
Dependent Claim
38 words
An ink jet recording unit comprising an ink containing portion containing an ink and a head portion for discharging said ink as ink droplets, wherein said ink is an ink of any one of claims 1 to 10.
Claim 13
Dependent Claim
27 words
An ink jet recording unit according to claim 11, wherein said head portion includes a head for discharging ink droplets by applying thermal energy to an ink.
Claim 14
Dependent Claim
26 words
An ink cartridge comprising an ink containing portion for containing an ink, wherein said ink is an ink of any one of claims 1 to 10.
Claim 15
Dependent Claim
42 words
An ink jet recording apparatus comprising a recording unit having an ink containing portion containing an ink and a head portion for discharging said ink as ink droplets, wherein said ink is an ink of any one of claims 1 to 10.
Claim 16
Dependent Claim
27 words
An ink jet recording apparatus according to claim 14, wherein said head portion includes a head for discharging ink droplets by applying thermal energy to said ink.
Claim 17
Dependent Claim
43 words
An ink jet recording apparatus comprising an ink cartridge provided with an ink containing portion containing an ink and a recording head for discharging said ink as ink droplets, wherein said ink is an ink of any one of claims 1 to 10.
Claim 18
Dependent Claim
28 words
An ink jet recording apparatus according to claim 16, further comprising an ink supply portion for supplying said ink contained in said ink cartridge to said recording head.
Claim 19
Dependent Claim
27 words
An ink jet recording apparatus according to claim 16, wherein said recording head includes a head for discharging ink droplets by applying thermal energy to said ink.
Claim 20
Dependent Claim
24 words
An ink jet recording apparatus according to claim 17, wherein said recording head includes a head for discharging ink droplets by applying thermal energy.
Claim 21
Dependent Claim
28 words
An ink jet recording method for recording comprising discharging an ink as ink droplets, wherein said ink is an ink of any one of claims 1 to 10.
Claim 22
Dependent Claim
18 words
An ink jet recording method according to claim 19, further comprising applying thermal energy for discharging ink droplets.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 2000-11-10 | 2001-05-12 | 2001-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-11-10 | 2005-05-12 | 2005-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-11-10 | 2009-05-12 | 2009-11-11 | $7700.00 | Window Closed / Lapsed |