US3937663A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Structure of filter members
Assignee: Precision Mecanique Labinal SA
•
Filing: 1974-06-05
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Granted: 1976-02-10
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Expires: 1994-06-05
Abstract
Abstract A filter structure comprising a support and a porous folded sheet having a plurality of cooperating groups of corrugations, wherein the folds of one group overlap at least in part the folds of the adjacent group and have a uniform thickness, length and substantially parallel fold apex lines. On opposed sides, the folded sheet has at least two borders each of which borders has a single group of folds terminating in a frontal edge located in a plane substantially perpendicular to the apex lines of the folds. The borders extend outwardly of the cooperating groups of the corrugations to form an area for contact with the support wherein the borders may be embedded by seal means.
Inventors
- 👤 Pierre Etienne Bessiere
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:22
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/01; B01D29/012; B01D29/03; B01D29/031; B01D29/11; B01D29/111; B01D29/13; B01D29/15; B01D29/21; B01D2201/00; B01D2201/12
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
116 words
A filter structure comprising a support and a porous folded sheet having a plurality of cooperating groups of corrugations, the folds of one group overlapping at least in part the folds of the adjacent group and having uniform thickness, length and substantially parallel fold apex lines, said folded sheet having at least two borders each having a single group of folds terminating in a frontal edge located in a plane substantially perpendicular to the apex lines of the folds, the folds of each of said borders extending outwardly of said cooperating groups of corrugations to form an extended area for contact with said support and seal means for embedding said border areas fixedly to said support.
Claim 2
Dependent Claim
116 words
A filter structure comprising a support and a porous folded sheet having a plurality of cooperating groups of corrugations, the folds of one group overlapping at least in part the folds of the adjacent group and having uniform thickness, length and substantially parallel fold apex lines, said folded sheet having at least two borders each having a single group of folds terminating in a frontal edge located in a plane substantially perpendicular to the apex lines of the folds, the folds of each of said borders extending outwardly of said cooperating groups of corrugations to form an extended area for contact with said support and seal means for embedding said border areas fixedly to said support.
Claim 3
Dependent Claim
30 words
The structure in accordance with claim 1, in which each border has a single group of folds selected from the group consisting of zig-zag, pointed apex and rounded apex formations.
Claim 4
Dependent Claim
16 words
The structure in accordance with claim 1, in which the borders extend in the same plane.
Claim 5
Dependent Claim
15 words
The structure in accordance with claim 1, in which the borders extend in different planes.
Claim 6
Dependent Claim
39 words
The structure in accordance with claim 1, in which said folds define an inner and outer surface providing a predetermined thickness of said folded sheet and wherein the borders extend in a plane passing through one of said surfaces.
Claim 7
Dependent Claim
19 words
The structure in accordance with claim 1, in which said borders have relative to said structure the same orientation.
Claim 8
Dependent Claim
21 words
The structure in accordance with claim 1, in which the borders have relative to said folded sheet different orientations of extension.
Claim 9
Dependent Claim
32 words
The structure in accordance with claim 1, in which the number of borders is greater than two and can reach a number equal to that of the sides of the said structure.
Claim 10
Dependent Claim
24 words
The structure in accordance with claim 1, in which the plurality of said overlapping groups of corrugations comprise both linear folds and chevron folds.
Claim 11
Dependent Claim
31 words
The structure in accordance with claim 9, in which at least some of the groups of corrugations are formed with marginal folds and the borders are disposed along the marginal folds.
Claim 12
Dependent Claim
31 words
The structure in accordance with claim 9, in which at least some of said groups of corrugations are formed with chevron margins and the borders are disposed along the marginal chevrons.
Claim 13
Dependent Claim
20 words
The structure in accordance with claim 9, in which the borders are located both along the marginal chevrons and folds.
Claim 14
Dependent Claim
30 words
The structure in accordance with claim 9 in which said folded sheet is shaped to form a cylinder said two borders being located respectively at each end of said cylinder.
Claim 15
Dependent Claim
22 words
The structure in accordance with claim 13, in which the cylinder axis is parallel to the direction of the fold apex lines.
Claim 16
Dependent Claim
20 words
The structure in accordance with claim 14, in which the cylinder axis is parallel to the direction of the chevrons.
Claim 17
Dependent Claim
22 words
The structure in accordance with claim 13, in which the cylinder axis is perpendicular to the direction of the fold apex lines.
Claim 18
Dependent Claim
16 words
The structure in accordance with claim 1, wherein said folded sheet is shaped in irregular manner.
Claim 19
Dependent Claim
20 words
The structure in accordance with claim 17, wherein said folded sheet has the configuration of at least a partial torous.
Claim 20
Dependent Claim
34 words
The structure in accordance with claim 1, wherein said support comprises a fitting having at least one perforated section and at least one pair of grooves for receiving the borders and said seal means.
Claim 21
Dependent Claim
13 words
The structure in accordance with claim 19, in which the fitting is detachable.
Claim 22
Dependent Claim
28 words
The structure in accordance with claim 19, in which the fitting comprises circular grooves whose diameters are smaller than the diameters of the borders of the filter members.
Claim 23
Dependent Claim
22 words
The structure in accordance with claim 19, in which rectilinear grooves are provided on a fitting which forms a substantially planar plate.
Claim 24
Dependent Claim
33 words
An assembly of a pair of the structures formed in accordance with claim 19, wherein the borders of one of said structures overlap the borders of the other structure in the same groove.
Claim 25
Dependent Claim
29 words
The structure in accordance with claim 19, where said folded sheet is shaped into a generally tubular form and has the borders fixed in grooves filled with a sealant.
Claim 26
Dependent Claim
19 words
The structure in accordance with claim 24, in which said folded sheet is shaped into a substantially trapezoidal form.
Claim 27
Dependent Claim
20 words
The structure in accordance with claim 24, in which the border fold is sub-divided relative to that of the chevron.
Claim 28
Dependent Claim
10 words
The structure in accordance with claim 24, having overlapping chevrons.
Claim 29
Dependent Claim
50 words
The structure in accordance with claim 24, in which the end plates comprise circular receiving grooved areas for the folded sheet borders, said grooved areas being integral with central sealing bases in said plates, thus unitary members being formed for various uses on filter members having different heights and diameters.
Claim 30
Dependent Claim
23 words
The structure in accordance with claim 1, in which the thickness of the borders is reduced relative to that of the remaining structure.
References Cited (Backward Citations)
FR795282A
Cited
US2627350A
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US2731108A
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US3087623A
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FR1179607A
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US2919765A
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US3022861A
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US3013939A
Cited
US3290870A
Cited
US3490211A
Cited
US3712033A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-02-09 | 1979-08-11 | 1980-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-02-09 | 1983-08-11 | 1984-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-02-09 | 1987-08-11 | 1988-02-10 | $7700.00 | Window Closed / Lapsed |