Patent US5516336A successfully refreshed from Google Patents.
US4494128A
Expired / Lapsed
US
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Gray scale printing with ink jets
Assignee: HP Inc
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Filing: 1982-09-17
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Granted: 1985-01-15
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Expires: 2002-09-17
Abstract
Abstract An ink jet system using a single transducer chamber is disclosed which can produce a wide variation in visual print density (gray scale) without a reduction in print resolution. Vehicle is mixed with the ink during the actual jet printing process to produce the desired gray scale. The system is also readily adapted to produce multi-color prints.
Inventors
- 👤 John L. Vaught
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:52
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/005; B41J2/01; B41J2/21; B41J2/2107; B41J2/211; Y; Y10; Y10T; Y10T137/00; Y10T137/206; Y10T137/2082; Y10T137/218; Y10T137/2191; Y10T137/2196
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
37 words
A binary fluid flow valve comprising: a capillary; and a heat source coupled to the capillary for boiling fluid in the capillary, to create a stationary vapor bubble which stops the fluid from flowing in the capillary.
Claim 2
Dependent Claim
37 words
A binary fluid flow valve comprising: a capillary; and a heat source coupled to the capillary for boiling fluid in the capillary, to create a stationary vapor bubble which stops the fluid from flowing in the capillary.
Claim 3
Dependent Claim
16 words
A binary fluid flow valve as in claim 1 wherein the heat source is a resistor.
Claim 4
Dependent Claim
26 words
A binary fluid flow valve as in claim 1 further comprising on/off means coupled to the heat source for turning the heat source on and off.
Claim 5
Dependent Claim
109 words
In an ink jet system for printing having discharge means for expelling fluids from a transducer chamber, an apparatus for altering the visual appearance of the printing, the apparatus comprising: a plurality of reservoirs each containing a different fluid to be printed; capillaries connecting each of the reservoirs to the transducer chamber for carrying each of said fluids; and binary flow valves couples to each of said capillaries whereby flow through the capillaries may be turned on or off, said binary flow valves each having a heat source for boiling the fluid in the capillaries, thereby creating a vapor bubble which will stop fluid from flowing in the capillaries.
Claim 6
Dependent Claim
109 words
In an ink jet system for printing having discharge means for expelling fluids from a transducer chamber, an apparatus for altering the visual appearance of the printing, the apparatus comprising: a plurality of reservoirs each containing a different fluid to be printed; capillaries connecting each of the reservoirs to the transducer chamber for carrying each of said fluids; and binary flow valves couples to each of said capillaries whereby flow through the capillaries may be turned on or off, said binary flow valves each having a heat source for boiling the fluid in the capillaries, thereby creating a vapor bubble which will stop fluid from flowing in the capillaries.
Claim 7
Dependent Claim
13 words
An apparatus as in claim 4 wherein each heat source comprises a resistor.
Claim 8
Dependent Claim
129 words
In an ink jet system for printing having discharge means for expelling fluids from a transducer chamber, an apparatus for altering the visual appearance of the printing, the apparatus comprising: two reservoirs each containing a different fluid to be printed; first and second capillaries connecting each of the reservoirs to the transducer chamber for carrying each of said fluids; first and second flow restrictions in series respectively with the first and second capillaries; and a binary flow valve in series with the first flow restriction whereby flow through the first capillary may be turned on or off, each of said binary flow valves having a heat source for boiling the fluid in the first capillary, thereby creating a bubble which will stop fluid from flowing in said first capillary.
Claim 9
Dependent Claim
129 words
In an ink jet system for printing having discharge means for expelling fluids from a transducer chamber, an apparatus for altering the visual appearance of the printing, the apparatus comprising: two reservoirs each containing a different fluid to be printed; first and second capillaries connecting each of the reservoirs to the transducer chamber for carrying each of said fluids; first and second flow restrictions in series respectively with the first and second capillaries; and a binary flow valve in series with the first flow restriction whereby flow through the first capillary may be turned on or off, each of said binary flow valves having a heat source for boiling the fluid in the first capillary, thereby creating a bubble which will stop fluid from flowing in said first capillary.
Claim 10
Dependent Claim
13 words
An apparatus as in claim 6 wherein the heat source comprises a resistor.
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) | 1988-01-15 | 1988-07-16 | 1989-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-01-15 | 1992-07-16 | 1993-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-01-15 | 1996-07-16 | 1997-01-15 | $7700.00 | Window Closed / Lapsed |