Patent US4660057A successfully refreshed from Google Patents.
US4660057A
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Heater power controller for ink jet printer
Assignee: Konica Minolta Inc
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Filing: 1986-03-10
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Granted: 1987-04-21
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Expires: 2006-03-10
Abstract
Abstract A heater power controller for an ink jet printer wherein the output of a comparator making a comparison between a detection signal of the temperature of an ink in a print head of the ink jet printer and a reference signal is chopped by a clock having a predetermined period so as to be converted into a chopper signal, by which the supply of the power to a heating means provided in the head is controlled. A regulating device for regulating the duty ratio of the chopper signal is provided. Each of pulses constituting the chopper signal is made out of phase with a pulse supplied to other pulse-driven load.
Inventors
- 👤 Masato Watanabe
- 👤 Yasuhiko Tanaka
- 👤 Kiyotaka Murakami
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:13
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/005; B41J2/01; B41J2/17; B41J2/195; G; G05; G05D; G05D23/00; G05D23/19; G05D23/1906; G05D23/1913; G05D23/20
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
107 words
A heater power controller for an ink jet printer comprising a detecting means for detecting a temperature of an ink in a print head of the jet printer, said detecting means generating a detection signal corresponding to the temperature, a comparator for making a comparison between the detection signal and a reference signal, a chopping means for chopping an output signal of said comparator, whereby said output signal is converted into a chopper signal, and a regulating means for adjusting a duty ratio of said chopper signal according to characteristics of a heater for heating the ink, whereby said chopper signal is converted into a control signal.
Claim 2
Dependent Claim
107 words
A heater power controller for an ink jet printer comprising a detecting means for detecting a temperature of an ink in a print head of the jet printer, said detecting means generating a detection signal corresponding to the temperature, a comparator for making a comparison between the detection signal and a reference signal, a chopping means for chopping an output signal of said comparator, whereby said output signal is converted into a chopper signal, and a regulating means for adjusting a duty ratio of said chopper signal according to characteristics of a heater for heating the ink, whereby said chopper signal is converted into a control signal.
Claim 3
Dependent Claim
31 words
A heater power controller for an ink jet printer according to claim 1, wherein the pulses constituting said chopper signal is different in phase with pulses supplied to other pulse-driven load.
Claim 4
Dependent Claim
17 words
The heater power controller of claim 1 wherein the heater has a wide variation of heat efficiency.
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) | 1990-04-20 | 1990-10-20 | 1991-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-04-20 | 1994-10-20 | 1995-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-04-20 | 1998-10-20 | 1999-04-21 | $7700.00 | Window Closed / Lapsed |