US4599294A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Particles obtained by atomization while applying voltage
Assignee: Canon Inc
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Filing: 1985-05-29
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Granted: 1986-07-08
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Expires: 2005-05-29
Abstract
Abstract When a particulate material under molten or dissolved state is atomized by means of a fluid nozzle or a rotary disc type atomizer, a high voltage is applied to obtain particles which are uniform in shape and, for example, spherical with a narrow particle size distribution. Further, if necessary, the particles obtained are subsequently encapsulated in the continuous step.
Inventors
- 👤 Tohru Matsumoto
- 👤 Masuo Yamazaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:20
CPC Classifications
G; G03; G03G; G03G9/00; G03G9/08; G03G9/093; G03G9/09392
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
57 words
A method of producing a dry spherical toner, which comprises micropulverizing a toner material containing a coloring material and a binding material through an atomizing means under molten or dissolved state while applying an electrostatic force of 2 KV-200 KV between the atomizing means and a confronting wall opposed to the atomizing means for recovering micropulverized particles.
Claim 2
Independent Claim
57 words
A method of producing a dry spherical toner, which comprises micropulverizing a toner material containing a coloring material and a binding material through an atomizing means under molten or dissolved state while applying an electrostatic force of 2 KV-200 KV between the atomizing means and a confronting wall opposed to the atomizing means for recovering micropulverized particles.
Claim 3
Dependent Claim
16 words
A method according to claim 1, wherein micropulverization is conducted by means of a fluid nozzle.
Claim 4
Dependent Claim
18 words
A method according to claim 1, wherein micropulverization is conducted by means of a rotary disc type atomizer.
Claim 5
Independent Claim
72 words
A method of preparing a dry spherical microcapsule toner which comprises atomizing a component for a core material through an atomizing means while applying an electrostatic force of 2 KV-200 KV between the atomizing means and a confronting wall opposed to the atomizing means for recovering micropulverized particles, dispersing the said atomized core material and a liquid containing a shell material to coat the core material with the shell material, and drying.
Claim 6
Independent Claim
72 words
A method of preparing a dry spherical microcapsule toner which comprises atomizing a component for a core material through an atomizing means while applying an electrostatic force of 2 KV-200 KV between the atomizing means and a confronting wall opposed to the atomizing means for recovering micropulverized particles, dispersing the said atomized core material and a liquid containing a shell material to coat the core material with the shell material, and drying.
Claim 7
Dependent Claim
16 words
A method according to claim 4, wherein atomizing is conducted by means of a fluid nozzle.
Claim 8
Dependent Claim
18 words
A method according to claim 4, where atomizing is conducted by means of a rotary disc type atomizer.
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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) | 1989-07-07 | 1990-01-06 | 1990-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-07-07 | 1994-01-06 | 1994-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-07-07 | 1998-01-06 | 1998-07-08 | $7700.00 | Window Closed / Lapsed |