US5621447A
Expired / Lapsed
US
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Jet recording method
Assignee: Canon Inc
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Filing: 1995-06-06
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Granted: 1997-04-15
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Expires: 2015-06-06
Abstract
Abstract In a jet recording method, a normally solid recording material is placed in a heat-melted state in a path defined by a nozzle leading to an ejection outlet and, in a recording step, is imparted with a thermal energy corresponding to a recording signal to generate a bubble, thus ejecting a droplet of the recording material out of the ejection outlet. As an improvement, in the recording step, the bubble is caused to communicate with ambience, and the droplet is ejected in a diameter d (μm) and at an average speed v (m/sec) satisfying: 10≦d≦60 and 7≦v≦20. As a result, the droplet is deposited on a recording medium without pileup or scattering.
Inventors
- 👤 Yoshihisa Takizawa
- 👤 Katsuhiro Shirota
- 👤 Hisao Yaegashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 02:22
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/005; B41J2/01; B41J2/015; B41J2/04; B41J2/045; B41J2/04501; B41J2/0458; B41J2/135; B41J2/14; B41J2/14016; B41J2002/14169
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
115 words
A jet recording method, comprising: a preliminary step of placing a normally solid recording material in a heat-melted state in a path defined by a nozzle leading to an ejection outlet, and a recording step of imparting to the melted recording material a thermal energy corresponding to a recording signal to generate a bubble, thus ejecting a droplet of the recording material out of the ejection outlet by an action of the bubble to deposit the droplet on a recording medium; wherein in the recording step, the bubble is caused to communicate with ambience, and the droplet is ejected in a diameter d, μm, and at an average speed v, m/sec satisfying: 10≦d≦60 and 7≦v≦20.
Claim 2
Dependent Claim
115 words
A jet recording method, comprising: a preliminary step of placing a normally solid recording material in a heat-melted state in a path defined by a nozzle leading to an ejection outlet, and a recording step of imparting to the melted recording material a thermal energy corresponding to a recording signal to generate a bubble, thus ejecting a droplet of the recording material out of the ejection outlet by an action of the bubble to deposit the droplet on a recording medium; wherein in the recording step, the bubble is caused to communicate with ambience, and the droplet is ejected in a diameter d, μm, and at an average speed v, m/sec satisfying: 10≦d≦60 and 7≦v≦20.
Claim 3
Dependent Claim
25 words
A method according to claim 1, wherein the bubble communicates with the ambience when the bubble has an internal pressure not higher than ambient pressure.
Claim 4
Dependent Claim
14 words
A method according to claim 1, wherein the droplet diameter d, μm, satisfies 15≦d≦60.
Claim 5
Dependent Claim
14 words
A method according to claim 1, wherein the average velocity v, m/sec, satisfies 7≦v≦15.
Claim 6
Dependent Claim
20 words
A method according to claim 1, wherein a plurality of the droplets is deposited in superposition on the recording medium.
Claim 7
Dependent Claim
14 words
A method according to claim 5, wherein the droplet diameter d, μm, satisfies 10≦d≦30.
Claim 8
Dependent Claim
21 words
A method according to claim 1, wherein the recording material has a surface tension, dyne/cm, satisfying γ≧20 in the molten state.
Claim 9
Dependent Claim
21 words
A method according to claim 1, wherein the recording material has a surface tension, dyne/cm, satisfying 20≦γ≦40 in the molten state.
Claim 10
Dependent Claim
19 words
A method according to claim 1, wherein the recording material has a viscosity, cP, at 100° C., satisfying 1.5≦η≦10.
Claim 11
Dependent Claim
19 words
A method according to claim 1, wherein the recording material has a viscosity, cP, at 100° C., satisfying 1.5≦η≦5.0.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-04-14 | 2000-10-14 | 2001-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-04-14 | 2004-10-14 | 2005-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-04-14 | 2008-10-14 | 2009-04-15 | $7700.00 | Window Closed / Lapsed |