US4353079A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic device having a variable density thermal ink jet recorder
Assignee: Canon Inc
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Filing: 1980-03-24
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Granted: 1982-10-05
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Expires: 2000-03-24
Abstract
Abstract An electronic device provided with recording unit in which thermal energy is made to act on a fine solution compartment, the liquid in orifice section is pushed out by the air bubbles generated, keyboard, arithmetic and logical unit, memory unit, control unit, and power supply, in which arithmetic operation or control is made based on the command from the keyboard to record numerics, characters, symbols, etc. on recording paper, and based on the command from said keyboard, said control circuit selects the number of times of liquid discharge.
Inventors
- 👤 Tsuyoshi Kawanabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:00
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/005; B41J2/01; B41J2/015; B41J2/04; B41J2/045; B41J2/04501; B41J2/04541; B41J2/04543; B41J2/0458; B41J2/485; B41J2/505; B41J2/515
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
119 words
An electronic device having a thermal ink jet printer comprising: a character generator for generating character information to be recorded on a recording medium; an AND gate, one input terminal of which receives the output of said character generator; heater means for receiving the output of said AND gate and for causing an ink jet nozzle to eject droplets of a recording fluid in response to said AND gate's output; a keyboard provided with an instruction key for instructing the number of outputs of said AND gate; and a control section connected to another input terminal of said AND gate for controlling the number of outputs from said AND gate in accordance with the operation of said instruction key.
Claim 2
Dependent Claim
119 words
An electronic device having a thermal ink jet printer comprising: a character generator for generating character information to be recorded on a recording medium; an AND gate, one input terminal of which receives the output of said character generator; heater means for receiving the output of said AND gate and for causing an ink jet nozzle to eject droplets of a recording fluid in response to said AND gate's output; a keyboard provided with an instruction key for instructing the number of outputs of said AND gate; and a control section connected to another input terminal of said AND gate for controlling the number of outputs from said AND gate in accordance with the operation of said instruction key.
Claim 3
Dependent Claim
15 words
An electronic device according to claim 1 wherein said device includes an electronic desk-top calculator.
Claim 4
Dependent Claim
54 words
An electronic device according to claim 1 wherein said control section comprises a flip-flop responsive to the operation of said instruction key, an AND gate to which a timing signal and the output signal of said flip-flop are applied, and an OR gate to which the output signal of said AND gate is applied.
Claim 5
Dependent Claim
32 words
An electronic device according to claim 1 wherein said heater means causes said nozzle to eject the droplets by expansion and contraction of a bubble generated by heat from said heater means.
References Cited (Backward Citations)
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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) | 1985-10-04 | 1986-04-05 | 1986-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-10-04 | 1990-04-05 | 1990-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-10-04 | 1994-04-05 | 1994-10-05 | $7700.00 | Window Closed / Lapsed |