US3704787A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Seal for disposable media filter apparatus
Assignee: Individual
•
Filing: 1970-11-23
•
Granted: 1972-12-05
•
Expires: 1990-11-23
Abstract
Abstract A filter apparatus in which a sheet of disposable filter media is moved by a carrier belt over the open top of a tank subjected to sub-atmospheric pressure, with liquid to be filtered disposed on the top face of the filter media to be drawn therethrough into the tank, and having seals formed at the side margins of the carrier belt and travelling with the belt to maintain the subatmospheric pressure in the tank.
Inventors
- 👤 Orien K Norton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:36
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/62; B01D29/66; B01D29/09; B01D29/096
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
208 words
A filter apparatus comprising a filtered liquid receptacle having a generally rectangular open upper face, marginal plates extending in parallel along two opposite sides of said receptacle and forming the longitudinal side margins of said open receptacle face, an endless perforate flexible belt adapted to move between and parallel to said marginal plates to thereby close the said open upper face of the receptacle, a strip of filter media disposed on said belt and continuously carried by the belt across said receptacle from a roll of said filter media at one end of the receptacle to a disposal area at the opposite end of the receptacle, means for depositing unfiltered liquid centrally on said filter media strip as it is transported by said belt, means for establishing subatmospheric pressure within said receptacle to draw liquid through said filter media strip and said belt into said receptacle, sealing means secured to and travelling with said belt, said filter media extending over at least a portion of said sealing means, and said sealing means extending over an adjacent portion of said belt and extending over at least a portion of and slidably engaging said marginal plate adjacent thereto for sealing the longitudinal junctions of said belt and said marginal plates.
Claim 2
Dependent Claim
208 words
A filter apparatus comprising a filtered liquid receptacle having a generally rectangular open upper face, marginal plates extending in parallel along two opposite sides of said receptacle and forming the longitudinal side margins of said open receptacle face, an endless perforate flexible belt adapted to move between and parallel to said marginal plates to thereby close the said open upper face of the receptacle, a strip of filter media disposed on said belt and continuously carried by the belt across said receptacle from a roll of said filter media at one end of the receptacle to a disposal area at the opposite end of the receptacle, means for depositing unfiltered liquid centrally on said filter media strip as it is transported by said belt, means for establishing subatmospheric pressure within said receptacle to draw liquid through said filter media strip and said belt into said receptacle, sealing means secured to and travelling with said belt, said filter media extending over at least a portion of said sealing means, and said sealing means extending over an adjacent portion of said belt and extending over at least a portion of and slidably engaging said marginal plate adjacent thereto for sealing the longitudinal junctions of said belt and said marginal plates.
Claim 3
Dependent Claim
39 words
A filter apparatus as claimed in claim 1 in which said sealing means comprise flexible sealing flaps secured to the side marginal areas of said belt and extending sidewardly in both directions from each side margin of said belt.
Claim 4
Dependent Claim
25 words
A filter apparatus as claimed in claim 2 in which the portions of said sealing flaps which slidably engage said marginal plates are longitudinally serrated.
Claim 5
Dependent Claim
83 words
A filter apparatus as claimed in claim 2 in which a flange extends inwardly toward the centerline of said belt from the underface of each of said marginal plates thereby presenting supporting surfaces for the side marginal areas of said belt, said sealing flaps each having a depending portion whose lower end slidably engages one of said supporting surfaces of said flange to provide a seal in addition to the seal provided by the slidable engagement of said flaps with said marginal plates.
Claim 6
Dependent Claim
132 words
Sealing means for a filter apparatus in which a filter media is carried by an endless belt traveling between marginal plates on both sides, unfiltered liquid is deposited centrally on the filter media, and low pressure is maintained below the belt to draw unfiltered liquid through the filter media, comprising flexible sealing flaps each having a horizontal portioN extending over an adjacent portion of the belt and extending over at least a portion of and slidably engaging the marginal plate adjacent thereto, each of said flaps having a depending portion adjacent and connected to the side marginal area of said belt, the lower end of each of said depending portions slidably engaging a supporting surface of the filter apparatus, and said filter media extending over a part of said horizontal flap portion.
Claim 7
Dependent Claim
132 words
Sealing means for a filter apparatus in which a filter media is carried by an endless belt traveling between marginal plates on both sides, unfiltered liquid is deposited centrally on the filter media, and low pressure is maintained below the belt to draw unfiltered liquid through the filter media, comprising flexible sealing flaps each having a horizontal portioN extending over an adjacent portion of the belt and extending over at least a portion of and slidably engaging the marginal plate adjacent thereto, each of said flaps having a depending portion adjacent and connected to the side marginal area of said belt, the lower end of each of said depending portions slidably engaging a supporting surface of the filter apparatus, and said filter media extending over a part of said horizontal flap portion.
Claim 8
Dependent Claim
27 words
The invention set forth in claim 5 wherein the underfaces of the horizontal portions of said flaps which slidably engage said marginal plates have longitudinal serrations therein.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-12-05 | 1976-06-05 | 1976-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-05 | 1980-06-05 | 1980-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-05 | 1984-06-05 | 1984-12-05 | $7700.00 | Window Closed / Lapsed |