Electric heating – Heating devices – With power supply and voltage or current regulation or...
Patent
1982-05-03
1984-07-10
Paschall, M. H.
Electric heating
Heating devices
With power supply and voltage or current regulation or...
219330, 219483, 219501, 219216, 219505, 346106, H05B 102
Patent
active
044594690
ABSTRACT:
A liquid temperature control apparatus for an ink jet printer has a first ink temperature sensor located adjacent but at a spacing from an ink ejection head and a second ink temperature sensor mounted on a heater. The two sensors have an identical temperature coefficient. A voltage supply to the heater is controlled in accordance with a difference between a reference voltage and a sum voltage of outputs of the two sensors. The voltage supply to the heater is further controlled on the basis of an apparent reference voltage, which is a difference between an output voltage of the first sensor and a reference voltage which provides a predetermined temperature, and an output voltage of the second sensor.
The two sensors are located before and after the heater. The differential voltage is coupled to the heater after being power-amplified by a power element for output. The power element is mounted on a support member for supporting a filter which is positioned immediately ahead of the first sensor.
First and second temperature sensors are positioned before and after a first heater to sense temperatures of an ink before and after heated by the first heater, respectively. The ink temperature is controlled by a difference between a sum voltage of outputs of the sensors and a reference voltage which provides a predetermined temperature. A second heater substantially common in thermal time constant to the head is located immediately ahead of the first sensor.
REFERENCES:
patent: 3999190 (1976-12-01), Brown
patent: 4167663 (1979-09-01), Granzow, Jr. et al.
patent: 4192992 (1980-03-01), Stevens et al.
patent: 4356383 (1982-10-01), Dahlberg et al.
Alexander David G.
Paschall M. H.
Ricoh & Company, Ltd.
LandOfFree
Ink temperature control apparatus for ink jet printing apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Ink temperature control apparatus for ink jet printing apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ink temperature control apparatus for ink jet printing apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1577686