Patent US3840304A successfully refreshed from Google Patents.
US3840304A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Screen-like liquid stream forming device for determining concentration
Assignee: Ricoh Co Ltd
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Filing: 1972-10-17
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Granted: 1974-10-08
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Expires: 1992-10-17
Abstract
Abstract A device comprising a plurality of liquid stream regulating members having liquid flow regulating surfaces disposed close to each other in face-to-face relationship to define therebetween a slit through which a stream of liquid is discharged and forms a screen-like liquid stream below the slit.
Inventors
- 👤 V Hirafuji
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:46
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/10; G03G15/104; G03G15/105; G01; G01N; G01N1/00; G01N1/28; G01N1/2813; G01N21/00; G01N21/84; G01N21/85
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
108 words
A screen-like liquid stream forming device for determining concentration comprising a plurality of liquid flow regulating members each having a liquid flow regulating surface, said liquid flow regulating surfaces being disposed close to each other in face-to-face relationship to define therebetween a slit serving as a discharging port through which a stream of liquid is discharged and forms a screen-like liquid stream below the slit, wherein said plurality of liquid flow regulating members have a width which becomes larger in going from the upstream portions of the flow regulating members toward the discharging port to thereby define a slit whose width diverges in going towards the discharging port.
Claim 2
Dependent Claim
108 words
A screen-like liquid stream forming device for determining concentration comprising a plurality of liquid flow regulating members each having a liquid flow regulating surface, said liquid flow regulating surfaces being disposed close to each other in face-to-face relationship to define therebetween a slit serving as a discharging port through which a stream of liquid is discharged and forms a screen-like liquid stream below the slit, wherein said plurality of liquid flow regulating members have a width which becomes larger in going from the upstream portions of the flow regulating members toward the discharging port to thereby define a slit whose width diverges in going towards the discharging port.
Claim 3
Dependent Claim
38 words
A device as set forth in claim 1 wherein said plurality of liquid flow regulating members have their end edges rounded by cutting inwardly in arcuate shape from opposite sides of the discharging port toward its central portion.
Claim 4
Dependent Claim
29 words
A device as set forth in claim 1 wherein said plurality of liquid flow regulating members each have a water-repellent material layer formed on the liquid flow regulaTing surfaces.
Claim 5
Dependent Claim
42 words
A device as set forth in claim 1 wherein said plurality of liquid flow regulating members are made of an electrically conducting material and have a bias voltage impressed thereon, said bias voltage having a polarity opposite to that of a toner.
Claim 6
Dependent Claim
26 words
A device as set forth in claim 1 wherein said slit has opposite end portions which have a larger area than the remainder of the slit.
Claim 7
Dependent Claim
52 words
A device as set forth in claim 1 wherein said plurality of liquid flow regulating members are made of a flexible material and formed integrally as a flexible tubular member having an outlet end, and further including presser means for compressing said tubular member adjacent said outlet end to form said slit.
Claim 8
Dependent Claim
39 words
A device as set forth in claim 6 wherein said presser means comprises a movable presser member and an immovable bolster member, and further including a motor connected to said presser member for adjusting the width of the slit.
Claim 9
Independent Claim
112 words
A device for forming a screen-like stream of liquid, comprising a. conduit means for conducting a flow of liquid and b. stream-forming means comprising flow guide structure for receiving a flow of liquid from the conduit, c. said flow guide structure including a pair of opposed, facing, closely spaced, flow-guiding surfaces cooperatively defining an elongated narrow slit which opens as a correspondingly elongated narrow outlet port for discharging a flow of liquid forming a screen-like liquid stream beyond the slit, wherein the width of each of said surfaces becomes larger in going from the conduit to the slit to thereby define a slit whose width diverges in going toward the outlet port.
Claim 10
Independent Claim
112 words
A device for forming a screen-like stream of liquid, comprising a. conduit means for conducting a flow of liquid and b. stream-forming means comprising flow guide structure for receiving a flow of liquid from the conduit, c. said flow guide structure including a pair of opposed, facing, closely spaced, flow-guiding surfaces cooperatively defining an elongated narrow slit which opens as a correspondingly elongated narrow outlet port for discharging a flow of liquid forming a screen-like liquid stream beyond the slit, wherein the width of each of said surfaces becomes larger in going from the conduit to the slit to thereby define a slit whose width diverges in going toward the outlet port.
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) | 1977-10-07 | 1978-04-08 | 1978-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-07 | 1982-04-08 | 1982-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-07 | 1986-04-08 | 1986-10-08 | $7700.00 | Window Closed / Lapsed |