Patent US4141709A successfully refreshed from Google Patents.
US4141709A
Expired / Lapsed
US
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Bushing environmental control
Assignee: PPG Industries Inc
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Filing: 1978-03-14
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Granted: 1979-02-27
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Expires: 1998-03-14
Abstract
Abstract A method is disclosed for controlling the environment below a glass fiber forming bushing. A fog or mist is created below the bushing by forming an air vortex in front of the bushing which carries water or another liquid cooling fluid upwardly towards the bushing. The cooling liquid is misted or fogged below the bushing. This mist or fog absorbs heat from the bushing and the apparatus in the region below the bushing and helps cool the environment below the bushing. In addition, this mist of cooling fluid acts as a radiation shield to reduce the amount of heat radiated from the bushing and other apparatus toward the operator of the forming position and thus aids in his comfort.
Inventors
- 👤 Walter J. Reese
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:41
CPC Classifications
C; C03; C03B; C03B37/00; C03B37/01; C03B37/02; C03B37/0203; C03B37/0206; C03B37/0213
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
113 words
In the method of forming continuous glass fibers comprising drawing filaments through a bushing, contacting the filaments with a liquid cooling fluid, gathering the filaments into a strand and collecting the strand the improvement comprising passing cooling air horizontally and downwardly toward the bushing, lifting a portion of the air in an area below the bushing upwardly toward the bushing at a velocity sufficient to entrap a portion of said cooling fluid to thereby create a supersaturated air atmosphere, establishing with the upwardly moving air a supersaturated air atmosphere immediately below the bushing, removing heat from the bushing environment with the supersaturated cooling air atmosphere, and removing and replacing the supersaturated air continously.
Claim 2
Dependent Claim
113 words
In the method of forming continuous glass fibers comprising drawing filaments through a bushing, contacting the filaments with a liquid cooling fluid, gathering the filaments into a strand and collecting the strand the improvement comprising passing cooling air horizontally and downwardly toward the bushing, lifting a portion of the air in an area below the bushing upwardly toward the bushing at a velocity sufficient to entrap a portion of said cooling fluid to thereby create a supersaturated air atmosphere, establishing with the upwardly moving air a supersaturated air atmosphere immediately below the bushing, removing heat from the bushing environment with the supersaturated cooling air atmosphere, and removing and replacing the supersaturated air continously.
Claim 3
Dependent Claim
19 words
The method of claim 1 further comprising flowing liquid cooling fluid along the sides of the fiber forming region.
Claim 4
Dependent Claim
28 words
The method of claim 2 further comprising cooling terminal clamps connected to said bushing with said liquid cooling fluid flowing along the sides of the fiber forming region.
Claim 5
Dependent Claim
29 words
The method of claim 1 wherein said supersaturated air atmosphere forms a radiation shield to shield an operator of the fiber forming position from heat from the bushing region.
Claim 6
Dependent Claim
122 words
In the method of forming continuous glass fiber comprising drawing filaments through a bushing, contacting the filaments with a liquid cooling fluid, gathering the filaments into a strand and collecting the strand the improvement comprising passing cooling air in a generally horizontal direction toward the bushing, directing a portion of the said cooling air passing underneath the bushing upwardly toward the bushing at a velocity sufficient to entrap a portion of said cooling fluid and moving the portion of air with the cooling fluid entrapped therein upwardly toward and below the bushing thereby creating a supersaturated air atmosphere immediately below the bushing, removing heat from the bushing environment with the supersaturated cooling air atmosphere and removing and replacing the supersaturated air continuously.
Claim 7
Dependent Claim
122 words
In the method of forming continuous glass fiber comprising drawing filaments through a bushing, contacting the filaments with a liquid cooling fluid, gathering the filaments into a strand and collecting the strand the improvement comprising passing cooling air in a generally horizontal direction toward the bushing, directing a portion of the said cooling air passing underneath the bushing upwardly toward the bushing at a velocity sufficient to entrap a portion of said cooling fluid and moving the portion of air with the cooling fluid entrapped therein upwardly toward and below the bushing thereby creating a supersaturated air atmosphere immediately below the bushing, removing heat from the bushing environment with the supersaturated cooling air atmosphere and removing and replacing the supersaturated air continuously.
Claim 8
Dependent Claim
19 words
The method of claim 5 further comprising flowing liquid cooling fluid along the sides of the fiber forming region.
Claim 9
Dependent Claim
28 words
The method of claim 6 further comprising cooling terminal clamps connected to said bushing with said liquid cooling fluid flowing along the sides of the fiber forming region.
Claim 10
Dependent Claim
29 words
The method of claim 5 wherein said supersaturated air atmosphere forms a radiation shield to shield an operator of the fiber forming position from heat from the bushing region.
Claim 11
Dependent Claim
19 words
The method of claim 1 wherein a said cooling fluid comprises water and said supersaturated air atmosphere comprises mist.
Claim 12
Dependent Claim
18 words
The method of claim 5 wherein said cooling fluid comprises water and said supersaturated air atmosphere comprises mist.
Claim 13
Dependent Claim
18 words
The method of claim 1 wherein the drawing of filaments is through the bushing tips of said bushing.
Claim 14
Dependent Claim
18 words
The method of claim 5 wherein the drawing of filaments is through the bushing tips of said bushing.
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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) | 1982-02-26 | 1982-08-28 | 1983-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-26 | 1986-08-28 | 1987-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-26 | 1990-08-28 | 1991-02-27 | $7700.00 | Window Closed / Lapsed |