Patent US5084740A successfully refreshed from Google Patents.
US5084740A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image recording apparatus with high voltage supply current stabilizing circuit
Assignee: Fujifilm Business Innovation Corp
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Filing: 1990-11-21
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Granted: 1992-01-28
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Expires: 2010-11-21
Abstract
Abstract An image recording apparatus in which a constant current is supplied from a high voltage source to a charging unit to charge a photo-sensitive material, and the constant current is further supplied to a peeling unit to peel a printing sheet off the photo-sensitive material on which an image has been recorded is provided with a high voltage supply current stabilizing circuit which comprises; a first resistor for stabilizing a constant current supplied to the peeling unit, the first resistor being larger in resistance than the peeling unit; and a second resistor for stabilizing a constant current supplied to the charging unit when the resistance of the first resistor is larger than the resistance of the peeling unit, whereby a constant current is stably supplied to the peeling unit even when the resistance of the latter changes.
Inventors
- 👤 Katsuo Simizu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:57
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/65; G03G15/6532; G03G15/6535; G03G15/02; G03G15/0283
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
160 words
An image recording apparatus having a current supplied from a high voltage source through a high supply current stabilizing circuit to a charging unit to charge a photosensitive material, said current being further supplied to a peeling unit to peel a printing sheet off of said photosensitive material on which an image has been recorded, said peeling unit having a resistance, and said high voltage supply current stabilizing circuit comprising: a first resistive means for stabilizing said current supplied to said peeling unit to be constant, even when the resistance of the peeling unit fluctuates, said first resistance means having a resistance larger than said resistance of the peeling unit by a substantial amount; and a second resistive means for stabilizing said current supplied to said charging unit, said second resistive means comprising a resistor connected with respect to the first resistive means and the charging unit to improve the overall stability of said high voltage supply current stabilizing circuit.
Claim 2
Dependent Claim
160 words
An image recording apparatus having a current supplied from a high voltage source through a high supply current stabilizing circuit to a charging unit to charge a photosensitive material, said current being further supplied to a peeling unit to peel a printing sheet off of said photosensitive material on which an image has been recorded, said peeling unit having a resistance, and said high voltage supply current stabilizing circuit comprising: a first resistive means for stabilizing said current supplied to said peeling unit to be constant, even when the resistance of the peeling unit fluctuates, said first resistance means having a resistance larger than said resistance of the peeling unit by a substantial amount; and a second resistive means for stabilizing said current supplied to said charging unit, said second resistive means comprising a resistor connected with respect to the first resistive means and the charging unit to improve the overall stability of said high voltage supply current stabilizing circuit.
Claim 3
Dependent Claim
131 words
An image recording apparatus having a current supplied from a high voltage source to a charging unit to charge a photosensitive material, said current being further supplied to a peeling unit to peel a printing sheet off of said photosensitive material on which an image has been recorded, said peeling unit having a resistance, and said high voltage source including a high voltage supply current stabilizing circuit comprising: a first resistive means for stabilizing said current supplied to said peeling unit to be constant, even when the resistance of the peeling unit fluctuates, said first resistor means having a resistance larger than said resistance of the peeling unit by a substantial amount; and a second resistive means for stabilizing said current supplied to said charging unit to inhibit a toner explosion.
Claim 4
Dependent Claim
131 words
An image recording apparatus having a current supplied from a high voltage source to a charging unit to charge a photosensitive material, said current being further supplied to a peeling unit to peel a printing sheet off of said photosensitive material on which an image has been recorded, said peeling unit having a resistance, and said high voltage source including a high voltage supply current stabilizing circuit comprising: a first resistive means for stabilizing said current supplied to said peeling unit to be constant, even when the resistance of the peeling unit fluctuates, said first resistor means having a resistance larger than said resistance of the peeling unit by a substantial amount; and a second resistive means for stabilizing said current supplied to said charging unit to inhibit a toner explosion.
References Cited (Backward Citations)
JPS58129448A
Cited
JPS63221365A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-01-27 | 1995-07-29 | 1996-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-01-27 | 1999-07-29 | 2000-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-01-27 | 2003-07-29 | 2004-01-28 | $7700.00 | Window Closed / Lapsed |