Patent US4337469A successfully refreshed from Google Patents.
US4337469A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ink liquid supply system for ink jet system printer
Assignee: Sharp Corp
•
Filing: 1977-12-27
•
Granted: 1982-06-29
•
Expires: 1997-12-27
Abstract
Abstract In an ink jet system printer of the charge amplitude controlling type, it is required to ensure stable printing that viscosity and surface tension of ink liquid supplied to a nozzle is maintained at a constant value. To this end, there is provided a heat generating pipe in an ink supply system and a control circuit for controlling power supply to the heat generating pipe. The viscosity and surface tension of the ink liquid is maintained at a constant value by holding the ink liquid at a predetermined temperature.
Inventors
- 👤 Rikuo Takano
- 👤 Yuji Sumitomo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:37
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/005; B41J2/01; B41J2/17; B41J2/195
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
184 words
In an ink liquid supply system for an ink jet system printer which emits ink droplets from a nozzle toward a recording paper, selectively deflects said ink droplets by a deflection means, and prints desired symbols on said recording paper with said deflected ink droplets, the improvements comprising: a. an ink liquid reservoir for containing the ink liquid therein; b. means including a heat generating pipe for supplying ink to said nozzle; c. a first conduit means for connecting said ink liquid reservoir with said heat generating pipe; d. a second conduit means for connecting said heat generating pipe with said nozzle; and e. a control circuit means for controlling the power supply to said heat generating pipe including a protect temperature sensing means operatively connected to said heat generating pipe for preventing accidental temperature fluctuations of said heat generating pipe and an ink liquid temperature sensing means for regulating the temperature of the said heat generating pipe in order to warm the ink liquid to a predetermined temperature and stabilize the viscosity and surface tension of said ink liquid supplied to said nozzle.
Claim 2
Dependent Claim
184 words
In an ink liquid supply system for an ink jet system printer which emits ink droplets from a nozzle toward a recording paper, selectively deflects said ink droplets by a deflection means, and prints desired symbols on said recording paper with said deflected ink droplets, the improvements comprising: a. an ink liquid reservoir for containing the ink liquid therein; b. means including a heat generating pipe for supplying ink to said nozzle; c. a first conduit means for connecting said ink liquid reservoir with said heat generating pipe; d. a second conduit means for connecting said heat generating pipe with said nozzle; and e. a control circuit means for controlling the power supply to said heat generating pipe including a protect temperature sensing means operatively connected to said heat generating pipe for preventing accidental temperature fluctuations of said heat generating pipe and an ink liquid temperature sensing means for regulating the temperature of the said heat generating pipe in order to warm the ink liquid to a predetermined temperature and stabilize the viscosity and surface tension of said ink liquid supplied to said nozzle.
Claim 3
Dependent Claim
34 words
The ink liquid supply system of claim 1, wherein the heat generating pipe is made of thin stainless steel and both ends of which are connected to receive power supply from the control circuit.
Claim 4
Dependent Claim
25 words
The ink liquid supply system of claim 1, wherein the inner surface of the heat generating pipe is coated with an electrically insulating thin film.
Claim 5
Dependent Claim
44 words
The ink liquid supply system of claim 1, wherein there is further provided: an inlet hollow coupler for coupling the first conduit means with the heat generating pipe; and an outlet hollow coupler for coupling the second conduit means with the heat generating pipe.
Claim 6
Dependent Claim
23 words
The ink liquid supply system of claim 4, wherein the inlet hollow coupler and the outlet hollow coupler are made of acetal resin.
Claim 7
Dependent Claim
34 words
The ink liquid supply system of claim 1, wherein said protect temperature sensing means precludes the power supply to the heat generating pipe when the heat generating pipe is at a considerably high temperature.
Claim 8
Dependent Claim
29 words
The ink liquid supply system of claim 6, wherein the protect temperature sensing means is attached to the center portion of the outer surface of said heat generating pipe.
Claim 9
Dependent Claim
22 words
The ink liquid supply system of claim 6, wherein the protect temperature sensing means is made of a positive temperature coefficient thermistor.
Claim 10
Dependent Claim
67 words
The ink liquid supply system according to claim 1, wherein there is further provided: an inlet hollow coupler for coupling the first conduit means with said heat generating pipe; an outlet hollow coupler for coupling the second conduit means with the heat generating pipe; and said ink liquid temperature sensing means for regulating the temperature of said heat generating pipe is provided at the outlet hollow coupler.
Claim 11
Dependent Claim
23 words
The ink liquid supply system of claim 9, wherein the ink liquid temperature sensing means is made of a positive temperature coefficient thermistor.
References Cited (Backward Citations)
US703970A
Cited
US2478917A
Cited
US3105136A
Cited
US3255689A
Cited
US3371186A
Cited
US3653932A
Cited
US3766357A
Cited
US3780250A
Cited
US3761953A
Cited
US3878519A
Cited
US3929071A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-06-28 | 1985-12-28 | 1986-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-06-28 | 1989-12-28 | 1990-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-06-28 | 1993-12-28 | 1994-06-29 | $7700.00 | Window Closed / Lapsed |