Patent US4386358A successfully refreshed from Google Patents.
US4386358A
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Ink jet printing using electrostatic deflection
Assignee: Xerox Corp
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Filing: 1981-09-22
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Granted: 1983-05-31
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Expires: 2001-09-22
Abstract
Abstract Electrostatic deflection is used in an oscillating bar drop-on-demand ink jet printer to compensate for about one half of the droplet displacement caused by bar velocity. The disclosed system provides a method for printing that is not sensitive to variations in ink droplet ejection velocity.
Inventors
- 👤 Kenneth H. Fischbeck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:38
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/005; B41J2/01; B41J2/07; B41J2/13
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
41 words
A method of correcting droplet placement errors caused by droplet ejection velocity variation in an oscillating bar ink jet printer, which comprises: electrostatically deflecting droplets in a direction to compensate for approximately one-half of the bar velocity induced droplet placement error.
Claim 2
Independent Claim
41 words
A method of correcting droplet placement errors caused by droplet ejection velocity variation in an oscillating bar ink jet printer, which comprises: electrostatically deflecting droplets in a direction to compensate for approximately one-half of the bar velocity induced droplet placement error.
Claim 3
Dependent Claim
101 words
The method of claim 1 and further including the steps of: providing a row of ink jet nozzles placed on said bar parallel to an axis of said bar; providing a first and a second electrode, one on either side of each of said ink jet nozzles, and positioned between said nozzles in a line parallel to said axis of said oscillating bar; providing direction sensor means for sensing the direction of movement of said oscillating bar; and providing control means responsive to said direction sensor means to apply electrical potential to the trailing electrode of said first and second electrodes.
Claim 4
Dependent Claim
44 words
The method of claim 2 and further including the steps of: providing velocity sensor means for sensing the velocity of said oscillating bar; and providing control means responsive to said velocity sensor means to control the amount of potential applied to said trailing electrode.
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) | 1986-05-30 | 1986-11-29 | 1987-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-30 | 1990-11-29 | 1991-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-30 | 1994-11-29 | 1995-05-31 | $7700.00 | Window Closed / Lapsed |