US3834134A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid tight seal for fluid treating filter
Assignee: American Air Filter Co Inc
•
Filing: 1972-11-15
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Granted: 1974-09-10
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Expires: 1992-11-15
Abstract
Abstract A fluid treating filter of the extended surface area type including a frame having at least one flow-through aperture therein and a filter bag of the extended surface area type having a mouth therein for receiving fluid to be filtered therethrough, the mouth having a strip of heat shrinkable material disposed along and coextensive with its perimeter and attached thereto, the strip of heat shrinkable material being adapted for mating with the flow-through aperture frame upon subjecting the shrinkable material to heat treating conditions sufficient to shrink the material to form a fluid tight seal with the frame.
Inventors
- 👤 Allister R Mc
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:35
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/02; B01D46/023; Y; Y10; Y10S; Y10S55/00; Y10S55/12
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
125 words
A fluid treating filter of the extended surface area type comprising a frame having an upstream and downstream side and at least one flow-through aperture therein, said aperture being defined by a flange on the downstream side of said frame; a filter bag of the extended surface area type having an open upstream end forming a mouth for receiving fluid to be filtered, said filter bag being mounted at its upstream end, said mouth outerfitting said flange; and, a strip of heat shrinkable material attached coextensively with and along the entire mouth of said filter bag, said strip of said heat shrinkable material mating with said flange, said strip having been subjected to sufficient heat to shrink said material to effect a fluid tight seal.
Claim 2
Dependent Claim
125 words
A fluid treating filter of the extended surface area type comprising a frame having an upstream and downstream side and at least one flow-through aperture therein, said aperture being defined by a flange on the downstream side of said frame; a filter bag of the extended surface area type having an open upstream end forming a mouth for receiving fluid to be filtered, said filter bag being mounted at its upstream end, said mouth outerfitting said flange; and, a strip of heat shrinkable material attached coextensively with and along the entire mouth of said filter bag, said strip of said heat shrinkable material mating with said flange, said strip having been subjected to sufficient heat to shrink said material to effect a fluid tight seal.
Claim 3
Dependent Claim
14 words
The fluid treating filter of claim 1, said flange having an outwardly extending lip.
Claim 4
Dependent Claim
19 words
The fluid treating filter of claim 1, said strip of heat shrinkable material being sewn to said filter bag.
Claim 5
Dependent Claim
15 words
The fluid treating filter of claim 1, said heat shrinkable material being a polyethylene film.
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) | 1977-09-09 | 1978-03-11 | 1978-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-09 | 1982-03-11 | 1982-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-09 | 1986-03-11 | 1986-09-10 | $7700.00 | Window Closed / Lapsed |