US3747120A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arrangement of writing mechanisms for writing on paper with a coloredliquid
Assignee: Individual
•
Filing: 1972-01-10
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Granted: 1973-07-17
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Expires: 1992-01-10
Abstract
Abstract An arrangement for applying droplets of a substance in liquid form to a surface. The arrangement includes a chamber which is divided into an outer chamber portion and an inner chamber portion with a channel connecting the outer and inner chamber portions. The inner chamber portion is provided with a device which produces short duration pressure increases in the fluid in the chamber. The outer chamber portion is provided with at least one intake channel for the supply of liquid from a supply container and a discharge channel through which the liquid is discharged for deposition on the surface. The discharge channel and the connecting channel are arranged so that they are axially aligned.
Inventors
- 👤 N Stemme
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:54
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/005; B41J2/01; B41J2/135; B41J2/145; B41J2/14; B41J2002/14387
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
148 words
In an arrangement for applying liquid droplets to a surface, e.g., an ink ejection writing mechanism, comprising at least one liquid applying unit including a chamber having an intake channel connected to a liquid supply container, and a discharge channel through which the liquid is discharged from said chamber, and means for producing short duration pressure increases in the liquid in the chamber, the imporvement wherein said chamber includes means dividing said chamber into an outer chamber portion adjacent to said discharge channel and an inner chamber portion, a connecting channel in said dividing means connecting the outer and inner chamber portions, said connecting channel being axially aligned with said discharge channel, and at least one said intake channel which opens into said outer chamber portion; and wherein said pressure producing means is in direct communication with and produces the desired pressure increases in said inner chamber portion.
Claim 2
Dependent Claim
148 words
In an arrangement for applying liquid droplets to a surface, e.g., an ink ejection writing mechanism, comprising at least one liquid applying unit including a chamber having an intake channel connected to a liquid supply container, and a discharge channel through which the liquid is discharged from said chamber, and means for producing short duration pressure increases in the liquid in the chamber, the imporvement wherein said chamber includes means dividing said chamber into an outer chamber portion adjacent to said discharge channel and an inner chamber portion, a connecting channel in said dividing means connecting the outer and inner chamber portions, said connecting channel being axially aligned with said discharge channel, and at least one said intake channel which opens into said outer chamber portion; and wherein said pressure producing means is in direct communication with and produces the desired pressure increases in said inner chamber portion.
Claim 3
Dependent Claim
16 words
An arrangement as defined in claim 1, wherein said liquid applying unit is a writing unit.
Claim 4
Dependent Claim
53 words
An arrangement as defined in claim 2, wherein the arrangement is constituted by a writing head which comprises at least seven writing units, wherein said writing units have a common outer liquid chamber portion, and wherein the discharge channels of said writing units are arranged in a row and parallel to one another.
Claim 5
Dependent Claim
37 words
An arrangement as defined in claim 3, wherein each writing unit further includes capillary openings provided in said unit in the area of said discharge channels, said capillary openings connecting the outer chamber portion with the atmosphere.
Claim 6
Dependent Claim
27 words
An arrangement as defined in claim 4, wherein the capillary openings consist of bores which are disposed on both sides of and parallel to the discharge channels.
Claim 7
Dependent Claim
29 words
An arrangement as defined in claim 5, wherein the distance of said bores from the discharge channels is greater than the distance of the discharge channels from one another.
Claim 8
Dependent Claim
89 words
An arrangement as defined in claim 2, wherein said arrangement is constituted by a plurality of writing heads provided in a row with each writing head including at least five writing units, each said writing unit including an extension means connecting the inner chamber portion to its connecting channel, wherein the connecting channels are arranged in a row and parallel to one another, said writing units have a common outer liquid chamber portion, and wherein said writing units lie in parallel rows perpendicular to said row of writing heads.
Claim 9
Dependent Claim
44 words
An arrangement as defined in claim 2, wherein the arrangement is constituted by a writing head which comprises two writing units, wherein said writing units have a common outer liquid chamber portion, and wherein the discharge channels of said writing units have different diameters.
Claim 10
Dependent Claim
23 words
An arrangement as defined in claim 8, wherein the discharge channels are oriented relative to each other to converge toward a common point.
Claim 11
Dependent Claim
17 words
An arrangement as defined in chaim 8, wherein the discharge channels are arranged parallel to one another.
Claim 12
Dependent Claim
17 words
An arrangement as defined in chaim 8, wherein the discharge channels are arranged parallel to one another.
Claim 13
Dependent Claim
32 words
An arrangement as defined in claim 2 wherein the arrangement is constituted by a writing head, and wherein said writing head comprises at least three writing units with fluid of different colors.
Claim 14
Dependent Claim
20 words
An arrangement as defined in claim 11, wherein the discharge channels of said writing units converge toward a common point.
Claim 15
Dependent Claim
23 words
An arrangement as defined in claim 11, wherein the discharge channels of said writing units lie in a row parallel to one another.
Claim 16
Dependent Claim
107 words
An arrangement as defined in claim 2, wherein the arrangement is constituted by a writing head; said arrangement further comprising a movable carriage, means mounting said writiNg head to said carriage, a paper bearing drum, said drum being so arranged that it rotates in front of said writing head, a picture bearing drum, a modulator, an amplifier and a photoscanner connected to said modulator, said writing head adapted to receive control signals via said modulator and said amplifier from said photoscanner which scans said picture from said picture bearing drum which rotates in synchronism with the respectuve position of the writing head on said paper bearing drum.
Claim 17
Dependent Claim
32 words
An arrangement as defined in claim 14, wherein said paper and said scanned picture are on a single drum, and wherein said writing head and photoscanner are disposed on the same carriage.
Claim 18
Dependent Claim
78 words
An arrangement as defined in claim 1, wherein the cross-sectional area of said discharge channel is so selected that the liquid is immediately stabilized therein when the fluid pressure in said chamber drops below a predetermined value due to the surface tension property of the liquid, and the direction of the liquid flow in the connecting channel is subsequently reversed, so that liquid is sucked in from said container through the outer chamber portion and said intake channel.
Claim 19
Dependent Claim
29 words
An arrangement as defined in claim 1, wherein the ratio of the diameter of said connecting channel to the diameter of said discharge channel lies between 1/4 and 4.
Claim 20
Dependent Claim
36 words
An arrangement as defined in claim 1, wherein the ratio of the distance between the two opposite ends of said discharge and connecting channels to the diameter of said discharge channel lies between 1/4 and 4.
Claim 21
Dependent Claim
41 words
An arrangement as defined in claim 1, wherein said pressure producing means comprises a movable membrane and a piezoelectric crystal, said movable membrane being adapted to be influenced by said crystal to produce a reduction in the volume of said chamber.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-16 | 1977-01-15 | 1977-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-16 | 1981-01-15 | 1981-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-16 | 1985-01-15 | 1985-07-17 | $7700.00 | Window Closed / Lapsed |