US3821928A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for continuous expression
Assignee: Morita Iron Works Co Ltd
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Filing: 1972-11-13
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Granted: 1974-07-02
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Expires: 1992-11-13
Abstract
Abstract An apparatus including a lower endless filter belt and an upper endless pressing belt with a squeezing chamber formed therebetween. The filter belt comprises a belt main body impermeable to liquid for backing and a filter medium covering the main body to provide a filtrate passageway therebetween and is inclined with its one end positioned at a higher level than the other end. The belt main body is substantially in the form of a trough having upstanding portions along its opposite side edges and receives filtrate which has passed through the filter medium, permitting the same to flow down the inclined filter belt and drop from its one end.
Inventors
- 👤 T Sugita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:32
CPC Classifications
B; B30; B30B; B30B9/00; B30B9/02; B30B9/24; B30B9/248
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
236 words
In an apparatus for continuous expression including a lower endless filter belt and an upper endless pressing belt to be circulated between a multitude of press rollers and arranged in face-to-face relation to each other, with a squeezing chamber formed between the two belts for causing a solid-liquid mixture to be introduced thereinto to recover the liquid by separating the same from the solids, the filter belt comprising a liquidimpermeable belt main body having longitudinal upstanding portions formed along its opposite side edges respectively for defining the transverse limits of a filtrate passageway and a filter medium covering the upper face of the belt main body with the filtrate passageway formed therebetween, the filter belt being so inclined that at least the upper run thereof is positioned at a high level at its one end with the other end thereof positioned at a low level, the filter medium extending away from the end of the belt main body at the low level independently of the belt main body, mixture feeding means mounted on the extending portion of the filter medium independent of the belt main body and a receptacle having an open top positioned below the extension of the filter medium so that the filtrate will flow down the incline between the longitudinal upstanding portions formed on the opposite side edges of the belt main body and pass through the filter medium into the open receptacle.
Claim 2
Dependent Claim
236 words
In an apparatus for continuous expression including a lower endless filter belt and an upper endless pressing belt to be circulated between a multitude of press rollers and arranged in face-to-face relation to each other, with a squeezing chamber formed between the two belts for causing a solid-liquid mixture to be introduced thereinto to recover the liquid by separating the same from the solids, the filter belt comprising a liquidimpermeable belt main body having longitudinal upstanding portions formed along its opposite side edges respectively for defining the transverse limits of a filtrate passageway and a filter medium covering the upper face of the belt main body with the filtrate passageway formed therebetween, the filter belt being so inclined that at least the upper run thereof is positioned at a high level at its one end with the other end thereof positioned at a low level, the filter medium extending away from the end of the belt main body at the low level independently of the belt main body, mixture feeding means mounted on the extending portion of the filter medium independent of the belt main body and a receptacle having an open top positioned below the extension of the filter medium so that the filtrate will flow down the incline between the longitudinal upstanding portions formed on the opposite side edges of the belt main body and pass through the filter medium into the open receptacle.
Claim 3
Dependent Claim
50 words
The apparatus for continuous expression as set forth in claim 1 wherein the space between the filter belt and the pressing belt defining the upper and lower faces of the squeezing chamber progressively reduces from the feed end for the mixture to be treated toward the discharge end for cake.
Claim 4
Dependent Claim
33 words
The apparatus for continuous expression as set forth in claim 1 wherein the filter medium is provided along its opposite side edges with projecting members defining the transverse limits of the squeezing chamber.
Claim 5
Dependent Claim
22 words
The apparatus for continuous expression as set forth in claim 3 wherein each of the projecting members is an elastic hollow body.
Claim 6
Dependent Claim
58 words
The apparatus for continous expression as set forth in claim 1 wherein a number of squeezing plates extend transversely side by side on the inner peripheral face of each of the filter belt and pressing belt and the squeezing plates are connected together at their opposite ends by endless drive chains for conjoint movement with the filter belt.
Claim 7
Dependent Claim
43 words
The apparatus for continuous expression as set forth in claim 1 wherein the belt main body is provided between its opposite side edges with a number of projections for supporting the filter medium thereon and independent filtrate passages are formed between the projections.
Claim 8
Dependent Claim
28 words
The apparatus for continuous expression as set forth in claim 6 wherein the projections for supporting the filter medium extend longitudinally of the belt main body in parallel.
Claim 9
Dependent Claim
44 words
The apparatus for continuous expression as set forth in claim 6 wherein the projections for supporting the filter medium extend transversely of the belt main body and have opposite ends spaced from the upstanding portions of the belt main body along its opposite edges.
Claim 10
Dependent Claim
65 words
The apparatus for continuous expression as set forth in claim 8 wherein the projections for supporting the filter medium are V-shaped when the belt main body is seen in plan and have opposite ends directed downward in accordance with the inclination of the filter belt so as to permit the filtrate to flow down quickly toward the opposite side edges of the belt main body.
Claim 11
Dependent Claim
55 words
The apparatus for continuous expression as set forth in claim 3 wherein the pressing belt is provided on its outer peripheral face with a number of protrusions extending transversely thereof side by side and the protrusions fit in between the opposite projecting members on the filter medium to prevent the feed mixture from escaping backward.
Claim 12
Dependent Claim
21 words
The apparatus for continuous expression as set forth in claim 10 wherein each of the protrusions is an elastic hollow body.
Claim 13
Dependent Claim
42 words
The apparatus for continuous expression as set forth in claim 10 wherein the protrusions are V-shaped when the pressing belt is seen in plan and have opposite ends directed toward the direction of travel of the feed mixture on the filter belt.
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) | 1977-07-01 | 1977-12-31 | 1978-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-01 | 1981-12-31 | 1982-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-01 | 1985-12-31 | 1986-07-02 | $7700.00 | Window Closed / Lapsed |