US4081501A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing odor absorbent and adsorbent air filter media
Assignee: Individual
•
Filing: 1976-07-09
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Granted: 1978-03-28
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Expires: 1996-07-09
Abstract
Abstract Dry, odor absorbent and adsorbent particulate is injected into an air pervious mat of randomly overlaid fibers by a first stream of pressurized air, and is distributed among the fibers for bonding thereto by a second stream of pressurized air. Particulate which fails to bond to the fibers is withdrawn and collected, preferably from both sides of the mat. Distribution of the odor absorbent particulate among the mat fibers is controlled by controlling air stream directions, volumes and pressures and by reflecting back into the mat a selected portion of the pressurized air which has traveled through the mat.
Inventors
- 👤 John P. Muther
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:46
CPC Classifications
B; B01; B01D; B01D39/00; B01D53/00; B01D53/02
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
160 words
A process of forming odor absorbent filter media for use in an environmental air recirculating system, comprising the steps of: a. forming an air pervious mat of randomly overlaid fibers; b. moving the mat along a path of travel past first and second closely spaced distribution head means; c. directing a first stream of pressurized air discharging through the first distribution head means to inject dry, odor absorbent particulate material into the mat among its fibers; d. directing a second stream or streams of pressurized air discharging through the second distribution head means to effect a desired distribution of the injected particulate material among the mat fibers; e. thereafter applying a bonding agent to said mat so as to form a bonded mat and to bond a part of the injected and distributed particulate material to the mat fibers; and f. withdrawing and collecting the unbonded injected and distributed particulate material from said mat leaving the odor absorbent filter media.
Claim 2
Dependent Claim
160 words
A process of forming odor absorbent filter media for use in an environmental air recirculating system, comprising the steps of: a. forming an air pervious mat of randomly overlaid fibers; b. moving the mat along a path of travel past first and second closely spaced distribution head means; c. directing a first stream of pressurized air discharging through the first distribution head means to inject dry, odor absorbent particulate material into the mat among its fibers; d. directing a second stream or streams of pressurized air discharging through the second distribution head means to effect a desired distribution of the injected particulate material among the mat fibers; e. thereafter applying a bonding agent to said mat so as to form a bonded mat and to bond a part of the injected and distributed particulate material to the mat fibers; and f. withdrawing and collecting the unbonded injected and distributed particulate material from said mat leaving the odor absorbent filter media.
Claim 3
Dependent Claim
52 words
The process of claim 1 wherein step (b) is effected by supporting the mat on a movable, air pervious structure which moves along the travel path beneath the first and second distribution head means, and step (f) is effected at least in part by passing said withdrawn particulate material through the structure.
Claim 4
Dependent Claim
58 words
The process of claim 2 wherein apertured means beneath the air pervious structure is located beneath at least one of the distribution head means to reflect back into the mat at least a part of the pressurized air discharging from said second distribution head means thereby assisting in the distribution of injected particulate material among the mat fibers.
Claim 5
Dependent Claim
39 words
The process of claim 2 wherein step (f) is also effected, at least in part, by a vacuum downstream from the first and second distribution head means on the opposite side of the mat from the air pervious structure.
Claim 6
Dependent Claim
20 words
The process of claim 1 wherein the pressure of the first air stream is about 1 to about 120 psig.
Claim 7
Dependent Claim
20 words
The process of claim 1 wherein the pressure of the second air stream is about 1 to about 250 psig.
Claim 8
Dependent Claim
40 words
The process of claim 1 in which in steps (c) and (d) the direction of the first and the second air streams relative to the direction of travel of the mat forms an angle from about 30° to about 150°.
Claim 9
Dependent Claim
17 words
The process of claim 1 wherein the dry particulate material injected into the mat is activated carbon.
Claim 10
Dependent Claim
45 words
The process of claim 1 wherein the first and second distribution head means discharge air streams into a common side of the mat, and at least a portion of the remaining injected and distributed particulate material is withdrawn from the opposite side of the mat.
Claim 11
Dependent Claim
27 words
The process of claim 9 wherein at least another portion of the unbonded injected and distributed particulate material is withdrawn from the common side of the mat.
References Cited (Backward Citations)
US3819435A
Cited
US3755522A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-03-27 | 1981-09-26 | 1982-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-03-27 | 1985-09-26 | 1986-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-03-27 | 1989-09-26 | 1990-03-28 | $7700.00 | Window Closed / Lapsed |