US3655055A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Band filter press
Assignee: Individual
•
Filing: 1970-07-02
•
Granted: 1972-04-11
•
Expires: 1990-07-02
Abstract
Abstract A cleaning arrangement comprising several fan spray nozzles and scrapers for cleaning both surfaces, and the entire width, of the filter band, in a vertical filter press, between the outlet end of the band from the filter plates and the drive roller for the band.
Inventors
- 👤 Richard Van Egdom
- 👤 Alfons Schotten
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:47
CPC Classifications
B; B01; B01D; B01D25/00; B01D25/12; B01D25/127; B01D25/1275; B01D25/32; B01D25/325; B01D25/327; B01D25/38; B01D25/383; B01D25/386
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
140 words
In a band filter press, a filter arrangement having an inlet and an outlet for an endless filter band; an endless filter band of fluid-permeable material; guide means for guiding said endless filter band along a filtering path from said inlet through said filter arrangement and out through said outlet and then along a return path back from said outlet to said inlet of said filter arrangement; drive means arranged along said return path spaced from said outlet and engaging said filtering band to move the same along said return path from said outlet back to said inlet; and cleaning means including a washing arrangement located along said return path between said outlet and said drive means and serving for cleaning said endless filter band so that said band is washed and cleaned before being engaged by said drive means.
Claim 2
Dependent Claim
140 words
In a band filter press, a filter arrangement having an inlet and an outlet for an endless filter band; an endless filter band of fluid-permeable material; guide means for guiding said endless filter band along a filtering path from said inlet through said filter arrangement and out through said outlet and then along a return path back from said outlet to said inlet of said filter arrangement; drive means arranged along said return path spaced from said outlet and engaging said filtering band to move the same along said return path from said outlet back to said inlet; and cleaning means including a washing arrangement located along said return path between said outlet and said drive means and serving for cleaning said endless filter band so that said band is washed and cleaned before being engaged by said drive means.
Claim 3
Dependent Claim
27 words
An arrangement as defined in claim 1, said washing arrangement including means for conveying a stream of washing medium through said band across the entire width thereof.
Claim 4
Dependent Claim
25 words
An arrangement as defined in claim 1, said washing arrangement including at least one mechanical cleaning means for cleaning the entire width of the band.
Claim 5
Dependent Claim
17 words
An arrangement as defined in claim 3, wherein said mechanical cleaning means are at least one brush.
Claim 6
Dependent Claim
18 words
An arrangement as defined in claim 4, wherein said brush rotates so as to increase the cleaning action.
Claim 7
Dependent Claim
17 words
An arrangement as defined in claim 3, wherein said mechanical cleaning means are at least one scraper.
Claim 8
Dependent Claim
24 words
An arrangement as defined in claim 6 further comprising means associated with said scraper for preventing sraped-off contaminates from falling back onto the band.
Claim 9
Dependent Claim
31 words
An arrangement as defined in claim 2, said washing arrangement including at least one means for producing a fan spray of washing medium that covers the entire width of the band.
Claim 10
Dependent Claim
25 words
An arrangement as defined in claim 8, said washing arrangement including at least one mechanical cleaning means for cleaning the entire width of the band.
Claim 11
Dependent Claim
41 words
An arrangement as defined in claim 9, wherein said path has an inlet end and further comprising rewash means located between said inlet end and said drive means for rewashing the band already at least partly cleaned by said washing arrangement.
Claim 12
Dependent Claim
124 words
Cleaning apparatus for cleaning the continuous filter band of a band filter press comprising, in combination, (a) a band filter press with a continuous filter band and a wash tank; (b) first spray and scraper means constructed and arranged to clean said continuous filter band after use for filtration in said filter press and before engagement with a first guide roller for said filter band within said wash tank; and (c) second spray and scraper means within said wash tank constructed and arranged to clean said continuous filter band after engagement with said first guide roller and before engagement with a drive roller for said continuous filter band, whereby said continuous filter band is essentially cleaned of residue before engagement with said drive roller.
Claim 13
Dependent Claim
124 words
Cleaning apparatus for cleaning the continuous filter band of a band filter press comprising, in combination, (a) a band filter press with a continuous filter band and a wash tank; (b) first spray and scraper means constructed and arranged to clean said continuous filter band after use for filtration in said filter press and before engagement with a first guide roller for said filter band within said wash tank; and (c) second spray and scraper means within said wash tank constructed and arranged to clean said continuous filter band after engagement with said first guide roller and before engagement with a drive roller for said continuous filter band, whereby said continuous filter band is essentially cleaned of residue before engagement with said drive roller.
References Cited (Backward Citations)
GB1080461A
Cited
US3486624A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-04-11 | 1975-10-11 | 1976-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-11 | 1979-10-11 | 1980-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-11 | 1983-10-11 | 1984-04-11 | $7700.00 | Window Closed / Lapsed |