Patent US4929964A successfully refreshed from Google Patents.
US4929964A
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Method for preparing liquid jet recording head, liquid jet recording head prepared by said method and liquid jet recording device having said liquid jet recording head mounted thereon
Assignee: Canon Inc
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Filing: 1989-06-07
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Granted: 1990-05-29
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Expires: 2009-06-07
Abstract
Abstract A method for preparing a liquid jet recording head which is to be used for generating heat energy to be utilized for discharging ink by applying electrical signals, having an electricity-heat energy convertor comprising a heat-generating resistor and a pair of electrodes for applying electrical signals on said heat-generating resistor, comprises the process of aging by heat treating the heat-generating resistor by applying electrical signals to said electrodes sufficient to stabilize the resistance value of said heat-generating resistor.
Inventors
- 👤 Koichi Sato
- 👤 Masami Ikeda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 18:48
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/005; B41J2/01; B41J2/015; B41J2/04; B41J2/045; B41J2/04501; B41J2/04565; B41J2/0458; B41J2/04591; B41J2/135; B41J2/16; B41J2/1601; B41J2/1604; B41J2/1621; B41J2/164; B41J2/1646
Claims Analysis
Total Claims: 37
Claim 1
Independent Claim
92 words
A method for preparing a liquid jet recording head, comprising the steps of: providing a liquid jet recording head having an electro-thermal energy convertor for generating heat energy for discharging ink by applying electrical signals to said electro-thermal convertor, said electro-thermal energy convertor comprising a heat-generating resistor and a pair of electrodes for applying electrical signals to said heat-generating resistor; and aging said heat-generating resistor by applying to said electrodes electrical signals sufficient to stabilize the resistance value of said heat-generating resistor by heat treating said heat-generating resistor through heat generation therein.
Claim 2
Independent Claim
92 words
A method for preparing a liquid jet recording head, comprising the steps of: providing a liquid jet recording head having an electro-thermal energy convertor for generating heat energy for discharging ink by applying electrical signals to said electro-thermal convertor, said electro-thermal energy convertor comprising a heat-generating resistor and a pair of electrodes for applying electrical signals to said heat-generating resistor; and aging said heat-generating resistor by applying to said electrodes electrical signals sufficient to stabilize the resistance value of said heat-generating resistor by heat treating said heat-generating resistor through heat generation therein.
Claim 3
Dependent Claim
25 words
A method for preparing a liquid jet recording head according to claim 1, wherein the electrical signals for said heat treatment are high frequency signals.
Claim 4
Dependent Claim
36 words
A method for preparing a liquid jet recording head according to claim 1, wherein said electrical signals for heat treating have a larger pulse width and/or voltage value than the electrical signals used for discharging liquid.
Claim 5
Dependent Claim
13 words
A liquid jet recording head prepared according to the method of claim 1.
Claim 6
Dependent Claim
50 words
A method according to claim 3, wherein when the foaming initiating voltage is defined as V 0 and the application voltage during heat treating as V, said electrical signals are applied at a voltage within the range of 1.15 to 1.25 of K-value which is their ratio (=V/V 0 ).
Claim 7
Dependent Claim
56 words
A method according to claim 3, wherein when the foaming initiating pulse width is defined as P 0 and the application pulse width during heat treating as P 1 said electrical signals are applied at a pulse width within the range of 1.30 to 1.55 of P-value which is their ratio (=P 1 /P 0 ).
Claim 8
Dependent Claim
19 words
A method according to claim 1, wherein the electrical signals for said heat treating are given by direct current.
Claim 9
Dependent Claim
23 words
A method according to claim 7, wherein said electrical signals are applied at a current value of 30 mA or higher per heater.
Claim 10
Dependent Claim
31 words
A method according to claim 1, wherein said aging step is performed after completion of said liquid jet recording head and before mounting said head onto the liquid jet recording device.
Claim 11
Dependent Claim
30 words
A method according to claim 1, wherein said aging step is performed in the course of preparation of said liquid jet recording head after formation of said electro-thermal energy convertor.
Claim 12
Dependent Claim
27 words
A method according to claim 1, wherein said aging step is performed after mounting of said liquid jet recording head completed onto the liquid jet recording device.
Claim 13
Dependent Claim
25 words
A method according to claim 9, wherein said aging step is performed under the state where ink is filled in said liquid jet recording head.
Claim 14
Dependent Claim
25 words
A method according to claim 11, wherein said aging step is performed under the state where ink is filled in said liquid jet recording head.
Claim 15
Dependent Claim
98 words
A liquid jet recording head having an opening, a liquid pathway communicating with said opening and an electro-thermal energy convertor for generating heat energy for discharging ink from said opening by applying electrical signals to said electro-thermal convertor, said electro-thermal energy convertor comprising a heat-generating resistor and a pair of electrodes for applying electrical signals to said heat-generating resistor, said liquid jet recording head being prepared by aging said heat-generating resistor by applying to said electrodes electrical signals sufficient to stabilize the resistance value of said heat-generating resistor by heat-treating said heat generating resistor through heat generation therein.
Claim 16
Dependent Claim
98 words
A liquid jet recording head having an opening, a liquid pathway communicating with said opening and an electro-thermal energy convertor for generating heat energy for discharging ink from said opening by applying electrical signals to said electro-thermal convertor, said electro-thermal energy convertor comprising a heat-generating resistor and a pair of electrodes for applying electrical signals to said heat-generating resistor, said liquid jet recording head being prepared by aging said heat-generating resistor by applying to said electrodes electrical signals sufficient to stabilize the resistance value of said heat-generating resistor by heat-treating said heat generating resistor through heat generation therein.
Claim 17
Dependent Claim
21 words
A liquid jet recording head according to claim 14, wherein the electrical signals for said heat treating are high frequency signals.
Claim 18
Dependent Claim
32 words
A liquid jet recording head according to claim 14, wherein said electrical signals for heat treating have a larger pulse width and/or voltage value than the electrical signals used for discharging liquid.
Claim 19
Dependent Claim
53 words
A liquid jet recording head according to claim 16, wherein when the foaming initiating voltage is defined as V 0 and the application voltage during heat treating as V, said electrical signals are applied at a voltage within the range of 1.15 to 1.25 of K-value which is their ratio (=V/V 0 ).
Claim 20
Dependent Claim
59 words
A liquid jet recording head according to claim 16, wherein when the foaming initiating pulse width is defined as P 0 and the application pulse width during heat-treating as P 1 , said electrical signals are applied at a pulse width within the range of 1.15 to 1.25 of P-value which is their ratio (=P 1 /P 0 ).
Claim 21
Dependent Claim
22 words
A liquid jet recording head according to claim 14, wherein the electrical signals for said heat treating are given by direct current.
Claim 22
Dependent Claim
26 words
A liquid jet recording head according to claim 19, wherein said electrical signals are applied at a current value of 30 mA or higher per heater.
Claim 23
Dependent Claim
34 words
A liquid jet recording head according to claim 14, wherein said aging process is performed after completion of said liquid jet recording head and before mounting said heat onto the liquid jet recording device.
Claim 24
Dependent Claim
33 words
A liquid jet recoridng head according to claim 14, wherein said aging process is performed in the course of preparation of said liquid jet recording head after formation of said electro-thermal energy convertor.
Claim 25
Dependent Claim
30 words
A liquid jet recording head according to claim 14, wherein said aging process is performed after mounting of said liquid jet recording head completed onto the liquid jet recording device.
Claim 26
Dependent Claim
28 words
A liquid jet recording head according to claim 21, wherein said aging process is performed under the state where ink is filled in said liquid jet recording head.
Claim 27
Dependent Claim
28 words
A liquid jet recording head according to claim 23, wherein said aging process is performed under the state where ink is filled in said liquid jet recording head.
Claim 28
Dependent Claim
103 words
A liquid jet recording device, comprising: a liquid jet recording head having an electro-thermal convertor for generating heat energy for discharging ink by applying electrical signals to said electro-thermal convertor, said electro-thermal convertor comprising a heat-generating resistor and a pair of electrodes for applying electrical signals to said heat-generating resistor, the liquid jet recording head being prepared by aging said heat-generating resistor by applying to said electrodes electrical signals sufficient to stabilize the resistance value of said heat-generating resistor by heat treating said heat-generating resistor through heat generation therein; and means for providing adequate discharge of ink from said liquid jet recording head.
Claim 29
Dependent Claim
103 words
A liquid jet recording device, comprising: a liquid jet recording head having an electro-thermal convertor for generating heat energy for discharging ink by applying electrical signals to said electro-thermal convertor, said electro-thermal convertor comprising a heat-generating resistor and a pair of electrodes for applying electrical signals to said heat-generating resistor, the liquid jet recording head being prepared by aging said heat-generating resistor by applying to said electrodes electrical signals sufficient to stabilize the resistance value of said heat-generating resistor by heat treating said heat-generating resistor through heat generation therein; and means for providing adequate discharge of ink from said liquid jet recording head.
Claim 30
Dependent Claim
32 words
A liquid jet recording device according to claim 26, wherein said aging process is performed after completion of said liquid jet recording head and before mounting onto the liquid jet recording device.
Claim 31
Dependent Claim
33 words
A liquid jet recording device according to claim 26, wherein said aging process is performed in the course of preparation of said liquid jet recording head after formation of said electro-thermal energy convertor.
Claim 32
Dependent Claim
30 words
A liquid jet recording device according to claim 26, wherein said aging process is performed after mounting of said liquid jet recording head completed onto the liquid jet recording device.
Claim 33
Dependent Claim
28 words
A liquid jet recording device according to claim 27, wherein said aging process is performed under the state where ink is filled in said liquid jet recording head.
Claim 34
Dependent Claim
28 words
A liquid jet recording device according to claim 29, wherein said aging process is performed under the state where ink is filled in said liquid jet recording head.
Claim 35
Dependent Claim
44 words
A liquid jet recording device according to claim 26, wherein said means for providing adequate discharge of ink comprises either preliminary discharging treatment control means, preliminary heating treatment control means or restoration treatment control means or a combination of two or more of these.
Claim 36
Independent Claim
113 words
A method for preparing a liquid jet recording head, comprising the steps of: providing a liquid jet recording head having an electro-thermal energy convertor for generating heat energy for discharging ink by applying electrical signals to said electro-thermal convertor, said electro-thermal energy convertor comprising a heat-generating resistor and a pair of electrodes for applying electrical signals to said heat-generating resistor; and aging said heat-generating resistor by applying to said electrodes electrical signals sufficient to stabilize the resistance value of said heat-generating resistor by heat treating said heat-generating resistor through heat generation therein, the signals applied during the aging step being different from the signals applied during image recording, preliminary discharging or preliminary heating.
Claim 37
Independent Claim
113 words
A method for preparing a liquid jet recording head, comprising the steps of: providing a liquid jet recording head having an electro-thermal energy convertor for generating heat energy for discharging ink by applying electrical signals to said electro-thermal convertor, said electro-thermal energy convertor comprising a heat-generating resistor and a pair of electrodes for applying electrical signals to said heat-generating resistor; and aging said heat-generating resistor by applying to said electrodes electrical signals sufficient to stabilize the resistance value of said heat-generating resistor by heat treating said heat-generating resistor through heat generation therein, the signals applied during the aging step being different from the signals applied during image recording, preliminary discharging or preliminary heating.
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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) | 1993-05-28 | 1993-11-27 | 1994-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-05-28 | 1997-11-27 | 1998-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-05-28 | 2001-11-27 | 2002-05-29 | $7700.00 | Window Closed / Lapsed |