US5378739A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Emulsion ink for use in stencil printing
Assignee: Ricoh Co Ltd
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Filing: 1992-10-30
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Granted: 1995-01-03
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Expires: 2012-10-30
Abstract
Abstract A W/O emulsion ink for use in stencil printing is composed of an oil phase and a water phase with the respective ratios by wt. % thereof being (20 to 40):(80 to 60). The oil phase is composed of a solvent component containing a volatile solvent with an initial boiling point of 150° to 210° C. and a nonvolatile solvent, with the respective ratios by wt. % thereof being (10 to 30):(90 to 70), a coloring agent, a resin, and a surface-active agent, with the amount of the resin in the oil phase being in the range of 2 to 8 wt. % of the total weight of the emulsion.
Inventors
- 👤 Masahiro Koike
- 👤 Hitoshi Ueda
- 👤 Hiroshi Tateishi
- 👤 Naohito Shimota
- 👤 Fumiaki Arai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 00:57
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/02; C09D11/023; C09D11/0235
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
113 words
A W/O emulsion ink for use in stencil printing comprising an oil phase and a water phase with the respective ratios by wt. % thereof being (20 to 40):(80 to 60), said oil phase comprising a solvent component which comprises a volatile solvent with an initial boiling point of 150° to 210° C. and a nonvolatile solvent, with the respective ratios by wt. % thereof being (10 to 30):(90 to 70), a coloring agent, a resin, and a surface-active agent, with the amount of said resin in said oil phase being in the range of 2 to 8 wt. % of the total weight of said emulsion, and said water phase comprising water.
Claim 2
Dependent Claim
113 words
A W/O emulsion ink for use in stencil printing comprising an oil phase and a water phase with the respective ratios by wt. % thereof being (20 to 40):(80 to 60), said oil phase comprising a solvent component which comprises a volatile solvent with an initial boiling point of 150° to 210° C. and a nonvolatile solvent, with the respective ratios by wt. % thereof being (10 to 30):(90 to 70), a coloring agent, a resin, and a surface-active agent, with the amount of said resin in said oil phase being in the range of 2 to 8 wt. % of the total weight of said emulsion, and said water phase comprising water.
Claim 3
Dependent Claim
34 words
The W/O emulsion ink as claimed in claim 1, wherein said volatile solvent comprises an aromatic component in an amount of 1 wt. % or less of the entire weight of said volatile solvent.
Claim 4
Dependent Claim
31 words
The W/O emulsion ink as claimed in claim 1, with the viscosity thereof being in the range of 28 to 38 mm in terms of spread meter value at 20° C.
Claim 5
Dependent Claim
26 words
The W/O emulsion ink as claimed in claim 1, wherein said water phase further comprises an antifreezing agent, an antiseptic agent, and a water-evaporation preventing agent.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-01-02 | 1998-07-04 | 1999-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-01-02 | 2002-07-04 | 2003-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-01-02 | 2006-07-04 | 2007-01-03 | $7700.00 | Window Closed / Lapsed |