US3830045A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compact air filter
Assignee: Axon Cable SA
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Filing: 1972-10-30
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Granted: 1974-08-20
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Expires: 1992-10-30
Abstract
Abstract A compact fibrous glass air filter unit is provided having a rectangular frame holding an air filter; the frame having an edge flange portion having a top and a bottom half folded over the filter, said flange flaring outwardly from the filter; tab portions on the top or bottom flange portions to form tongue-andgroove interlocking at the intersection of the flange portions; a scrim covering above the filter; and a bottom covering of closely perforated sheet; the scrim, filter and perforated sheet all being adhesively or mechanically adhered between the top half and bottom half portions of the flange.
Inventors
- 👤 J Copenhefer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:11
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/10
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
198 words
An air filtering unit comprising: a. a rectangular paper board frame formed of a plurality of frame members having straight edges and connected together at the corners of said frame, each of said frame members comprising a top flange and a bottom flange folded over one another at a score line, b. an air-permeable filter of bonded glass fibers, c. a bottom covering of closely perforated metal sheet adjacent one surface of said filter, d. a scrim adjacent to the other surface of said filter, e. each of said top and bottom flanges having a portion coplanar with one face of said filter and the peripheral margins of said filter, said perforated metal sheet and said scrim being disposed intermediate said coplanar portions and being affixed thereto, f. each of said top and bottom flanges having a portion flaring outwardly from the coplanar portions of said flanges, and g. a tab portion provided on the flared portion of a flange of one frame member at each corner of said frame disposed intermediate and affixed to the flared portions of the top and bottom flanges of an adjacent frame member to provide tongueand-groove interlocking intersections between adjacent frame members.
Claim 2
Dependent Claim
198 words
An air filtering unit comprising: a. a rectangular paper board frame formed of a plurality of frame members having straight edges and connected together at the corners of said frame, each of said frame members comprising a top flange and a bottom flange folded over one another at a score line, b. an air-permeable filter of bonded glass fibers, c. a bottom covering of closely perforated metal sheet adjacent one surface of said filter, d. a scrim adjacent to the other surface of said filter, e. each of said top and bottom flanges having a portion coplanar with one face of said filter and the peripheral margins of said filter, said perforated metal sheet and said scrim being disposed intermediate said coplanar portions and being affixed thereto, f. each of said top and bottom flanges having a portion flaring outwardly from the coplanar portions of said flanges, and g. a tab portion provided on the flared portion of a flange of one frame member at each corner of said frame disposed intermediate and affixed to the flared portions of the top and bottom flanges of an adjacent frame member to provide tongueand-groove interlocking intersections between adjacent frame members.
Claim 3
Dependent Claim
25 words
An air filtering unit according to claim 1 in which the scrim is composed of monofilament strands of glass fiber coated with a plastisol binder.
Claim 4
Dependent Claim
49 words
An air filtering unit according to claim 1 in which the scrim is composed of bundles of strands selected from the group consisting of cotton, rayon or polyester, each individual bundle being bonded with starch binder, and the bundles being on co-planar intersecting relationship to form a grid pattern.
Claim 5
Dependent Claim
184 words
An air filtering unit comprising: a. a rectangular paper board frame formed of a plurality of frame members having straight edges and connected together at the corners of said frame, each of said frame members comprising a top flange and a bottom flange folded over one another at a score line, b. an air-permeable filter of bonded glass fibers, c. a bottom covering of closely perforated sheet material adjacent one surface of said filter, d. each of said top and bottom flanges having a portion coplanar with one face of said filter, and the peripheral margins of said filter, and said perforated sheet being disposed interMediate said coplanar portions and being affixed thereto, e. each of said top and bottom flanges having a portion flaring outwardly from the coplanar portions of said flanges, and f. a tab portion provided on the flared portion of a flange of one frame member at each corner of said frame disposed intermediate and affixed to the flared portions of the top and bottom flanges of an adjacent frame member to provide tongue-and-groove interlocking intersections between adjacent frame members.
Claim 6
Dependent Claim
184 words
An air filtering unit comprising: a. a rectangular paper board frame formed of a plurality of frame members having straight edges and connected together at the corners of said frame, each of said frame members comprising a top flange and a bottom flange folded over one another at a score line, b. an air-permeable filter of bonded glass fibers, c. a bottom covering of closely perforated sheet material adjacent one surface of said filter, d. each of said top and bottom flanges having a portion coplanar with one face of said filter, and the peripheral margins of said filter, and said perforated sheet being disposed interMediate said coplanar portions and being affixed thereto, e. each of said top and bottom flanges having a portion flaring outwardly from the coplanar portions of said flanges, and f. a tab portion provided on the flared portion of a flange of one frame member at each corner of said frame disposed intermediate and affixed to the flared portions of the top and bottom flanges of an adjacent frame member to provide tongue-and-groove interlocking intersections between adjacent frame members.
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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) | 1977-08-19 | 1978-02-18 | 1978-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-19 | 1982-02-18 | 1982-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-19 | 1986-02-18 | 1986-08-20 | $7700.00 | Window Closed / Lapsed |