US3688034A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Distortion compensation in ink jet recording
Assignee: Individual
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Filing: 1969-12-01
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Granted: 1972-08-29
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Expires: 1989-12-01
Abstract
Abstract An ink jet type recording arrangement is available to write or print successive characters on a recording medium. Such recording arrangement has a writing head which is horizontally moved to successively write the characters. In case the writing head is manually operated to write successive characters, the moving velocity of the writing head varies time to time. The variation of the moving velocity of the head causes the character to be distorted. In order to compensate for the distortion of printing character, therefore, it is required to detect the moving velocity of the manual-operating head and to generate control voltage in response to the detected velocity. The control voltage generated is applied to the horizontal deflecting electrodes incorporated into the head to control the writing of the characters due to the ink jet.
Inventors
- 👤 Toshio Kashio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:47
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/005; B41J2/01; B41J2/07; B41J2/13
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
101 words
A method of compensating for distortion in an ink jet type writing means moved manually at varying speed relative to a recording medium and having ink jet deflection means to which voltages are applied for writing characters, which comprises the steps of measuring the velocity of movement of said writing means, generating a voltage having a potential gradient which varies as a function of the measured velocity, and applying the generated voltage to said deflection means to compensate for the distortion of the characters written by said writing means due to relative movement of the writing means sand the recording medium.
Claim 2
Independent Claim
101 words
A method of compensating for distortion in an ink jet type writing means moved manually at varying speed relative to a recording medium and having ink jet deflection means to which voltages are applied for writing characters, which comprises the steps of measuring the velocity of movement of said writing means, generating a voltage having a potential gradient which varies as a function of the measured velocity, and applying the generated voltage to said deflection means to compensate for the distortion of the characters written by said writing means due to relative movement of the writing means sand the recording medium.
Claim 3
Dependent Claim
40 words
A method in accordance with claim 1, wherein said measuring step comprises counting a plurality of clock pulses during an interval proportional to the said velocity, storing the number counted, and varying said potential gradient in accordance with said number.
Claim 4
Dependent Claim
46 words
A method in accordance with claim 2, wherein said voltage is generated by means including a plurality of different time constant circuits, and the gradient is varied by selecting a time constant circuit operable in the generating means in accordance with the number of pulses counted.
Claim 5
Dependent Claim
117 words
Apparatus for compensating for distortion in an ink jet type writing means moved at varying speed relative to a recording medium upon which successive characters are written in accordance with voltages applied to ink jet deflection means of the writing means, comprising means for measuring the velocity of movement of said writing means during the interval between the end of the writing of one character and the beginning of the writing of the next character, means connected to said measuring means for generating a distortion-compensating voltage during the writing of said next character, the magnitude of which voltage varies as a function of the measured velocity, and means for applying the generated voltage to the deflection means.
Claim 6
Dependent Claim
117 words
Apparatus for compensating for distortion in an ink jet type writing means moved at varying speed relative to a recording medium upon which successive characters are written in accordance with voltages applied to ink jet deflection means of the writing means, comprising means for measuring the velocity of movement of said writing means during the interval between the end of the writing of one character and the beginning of the writing of the next character, means connected to said measuring means for generating a distortion-compensating voltage during the writing of said next character, the magnitude of which voltage varies as a function of the measured velocity, and means for applying the generated voltage to the deflection means.
Claim 7
Dependent Claim
25 words
Apparatus in accordance with claim 4, wherein said generating means includes means for producing a variable potential gradient as a function of the measured velocity.
Claim 8
Dependent Claim
59 words
Apparatus in accordance with claim 5, wherein said measuring means comprises means for counting a number of clock pulses during said interval, means for storing the number of pulses counted during the writing of said next character, and means for connecting said storing means to said generating means for varying said potential gradient in accordance with the number stored.
Claim 9
Dependent Claim
33 words
Apparatus in accordance with claim 6, wherein said generating means is a sawtooth generator having a plurality of different time constant circuits selected in accordance with the number stored in Said storing means.
Claim 10
Dependent Claim
88 words
Apparatus for compensating for distortion in an ink jet type writing means moved at varying speed with respect to a recording medium for writing successive characters thereon in accordance with voltages applied to ink jet deflection means of said writing means, comprising variable potential gradient voltage generating means, means connected to said generating means for controlling the voltage gradient in response to signals synchronized with the starting and stopping of characters written by said writing means, and means for applying the generated voltage gradient to the deflection means.
Claim 11
Dependent Claim
88 words
Apparatus for compensating for distortion in an ink jet type writing means moved at varying speed with respect to a recording medium for writing successive characters thereon in accordance with voltages applied to ink jet deflection means of said writing means, comprising variable potential gradient voltage generating means, means connected to said generating means for controlling the voltage gradient in response to signals synchronized with the starting and stopping of characters written by said writing means, and means for applying the generated voltage gradient to the deflection means.
Claim 12
Dependent Claim
51 words
Apparatus in accordance with claim 8, wherein said controlling means comprises means for measuring the time between successive signals corresponding to the stopping of the writing of one character and the starting of the writing of the next character and for varying the voltage gradient in accordance with the measured time.
Claim 13
Dependent Claim
38 words
Apparatus in accordance with claim 8, wherein said controlling means comprises means for measuring the velocity of said writing means between the writing of successive characters and for varying the voltage gradient in accordance with the measured velocity.
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) | 1975-08-29 | 1976-02-28 | 1976-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-29 | 1980-02-28 | 1980-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-29 | 1984-02-28 | 1984-08-29 | $7700.00 | Window Closed / Lapsed |