US3767052A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for supporting filter medium for filter press
Assignee: Kurita Machinery Manufacturing Co Ltd
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Filing: 1972-03-30
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Granted: 1973-10-23
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Expires: 1992-03-30
Abstract
Abstract A filter medium is disposed along the filtering face of each filter plate in the form of a double sheet and extends upwardly and downwardly of the filter plate in endless fashion. After completion of a filtering operation, the portion of the endless filter medium facing the prefilt is replaced with the other portion opposite to the prefilt side for passing the filtrate so that the portion of the medium facing the prefilt on which cake has been deposited during filtration serves as a portion for passing the filtrate during the subsequent filtering operation and is spontaneously washed by the passage of filtrate during filtration.
Inventors
- 👤 K Shibasaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:36
CPC Classifications
B; B01; B01D; B01D25/00; B01D25/12; B01D25/127; B01D25/28; B01D25/282; B01D25/285; B01D25/32; B01D25/34
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
176 words
A filter press including a plurality of filter plates, each filter plate having first and second grooved faces, a first filter cloth associated with the first grooved face comprising an individual closed loop of filter cloth supported on upper and lower rollers adjacent said first grooved face and of sufficient size to cover said first grooved face so that said loop of cloth provides aN inner filter cloth portion and an outer filter cloth portion with the inner filter cloth portion being in an inner position against and immediately adjacent said first grooved face and the outer filter cloth portion lying against said inner filter cloth portion to provide a double thickness of filter cloth and means for pressuring filtrate first through said outer filter cloth portion, then through said inner filter cloth portion into the grooves of said first grooved face so that solid particles in said filtrate are deposited on said outer filter cloth portion and means for receiving filtrate from the grooves of said first grooved face for removal from said filter press.
Claim 2
Dependent Claim
176 words
A filter press including a plurality of filter plates, each filter plate having first and second grooved faces, a first filter cloth associated with the first grooved face comprising an individual closed loop of filter cloth supported on upper and lower rollers adjacent said first grooved face and of sufficient size to cover said first grooved face so that said loop of cloth provides aN inner filter cloth portion and an outer filter cloth portion with the inner filter cloth portion being in an inner position against and immediately adjacent said first grooved face and the outer filter cloth portion lying against said inner filter cloth portion to provide a double thickness of filter cloth and means for pressuring filtrate first through said outer filter cloth portion, then through said inner filter cloth portion into the grooves of said first grooved face so that solid particles in said filtrate are deposited on said outer filter cloth portion and means for receiving filtrate from the grooves of said first grooved face for removal from said filter press.
Claim 3
Dependent Claim
42 words
The invention of claim 1 additionally including drive means for rotating the rollers supporting the loop of filter cloth to reverse the positions of the inner portion of filter cloth and the outer portion of filter cloth subsequent to a filtering operation.
Claim 4
Dependent Claim
44 words
The invention of claim 2 additionally including scraper means engageable with said loop of filter cloth for scraping solid material from said outer portion of filter cloth during movement of said outer portion of filter cloth on said roller means to said inner position.
Claim 5
Dependent Claim
35 words
The invention of claim 3 additionally including brush means engageable with said loop of filter cloth for aiding in the removal of solid particles from said filter cloth as it moves past said brush means.
Claim 6
Dependent Claim
92 words
The invention of claim 1 wherein each filter plate is additionally associated with a second closed loop of filter cloth supported on upper and lower rollers to extend adjacent said second grooved face to provide an inner filter cloth portion engageable with said second grooved face and an outer filter cloth portion engageable with the inner filter cloth portion engaging said second grooved face so that pressurized filtrate can be forced through said outer and inner portions of said second filter cloth loop to enter the grooves of said second grooved face.
Claim 7
Dependent Claim
71 words
The invention of claim 5 wherein a plurality of said filter plates are mounted on clamping support means and additionally including a hollow filter frame means positioned between adjacent filter plates and having an inlet for filtrate, an expandable bladder mounted on said hollow filter frame between adjacent filter plates and comprising the means for pressurizing filtrate through the filter cloth portion of adjacent filter plates facing said hollow filter frame.
Claim 8
Dependent Claim
49 words
The invention of claim 6 additionally including drive means for rotating the upper rollers supporting the first and second loops of filter cloth to reverse the positions of the inner portions of filter cloth and the outer portions of filter cloth of each loop subsequent to a filtering operation.
Claim 9
Dependent Claim
49 words
The invention of claim 7 additionally including scraper means engageable with said loops of filter cloth for scraping solid material from said outer portions of each of said loops of filter cloth during movement of said outer portions of filter cloth on said roller means to said inner position.
Claim 10
Dependent Claim
31 words
The invention of claim 8 additionally including brush means engageable with said loops of filter cloth for removing solid particles from said cloth as the cloth moves past the brush means.
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) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |