US4171212A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Molten glass separating device in glass fiber forming apparatus
Assignee: Nitto Boseki Co Ltd
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Filing: 1978-08-09
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Granted: 1979-10-16
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Expires: 1998-08-09
Abstract
Abstract In a glass fiber forming apparatus comprising an orifice plate which has a large number of closely spaced orifices and has a flat undersurface and air is blown upwardly against said orifice plate during spinning operation, means is provided for mechanically separating into individual glass fibers a mass of molten glass adhering to the undersurface of the orifice plate in flooding condition before spinning is started or after all glass fibers are broken. The separating means is a clamping means so constructed and arranged as to clamp a mass of molten glass, means for moving said clamping means between a waiting position at which said clamping means will not interfere with the stream of filaments in the normal spinning operation and an operative position at which said clamping means can clamp a mass of molten glass, and means for causing said clamping means to open or close.
Inventors
- 👤 Hiroaki Shono
- 👤 Koji Nakazawa
- 👤 Shinzo Ishikawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:45
CPC Classifications
C; C03; C03B; C03B37/00; C03B37/01; C03B37/02; C03B37/03; C03B37/0203; C03B37/0213; C03B37/0216; Y; Y02; Y02P; Y02P40/00; Y02P40/50; Y02P40/57
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
159 words
In a glass fiber forming apparatus of the type having an orifice plate with a plurality of closely spaced orifices and a flat undersurface, means for downwardly drawing glass cones formed under said orifices to form into glass fibers, and means for blowing cooling air against the undersurface of said orifice plate, the improvement comprising means for separating a mass of molten glass adhered to the undersurface of said orifice plate in flooding condition into individual glass fibers, said separating means comprising an elongated stationary shaft standing on a floor spaced below said orifice plate at a position out of the stream of glass fibers and extending toward said orifice plate, a carrier movable along said shaft, means mounted on said carrier for releasably clamping said mass of molten glass, and a drive means for moving up and down said carrier to and from a position which may enable said clamping means to reach said mass of molten glass.
Claim 2
Dependent Claim
159 words
In a glass fiber forming apparatus of the type having an orifice plate with a plurality of closely spaced orifices and a flat undersurface, means for downwardly drawing glass cones formed under said orifices to form into glass fibers, and means for blowing cooling air against the undersurface of said orifice plate, the improvement comprising means for separating a mass of molten glass adhered to the undersurface of said orifice plate in flooding condition into individual glass fibers, said separating means comprising an elongated stationary shaft standing on a floor spaced below said orifice plate at a position out of the stream of glass fibers and extending toward said orifice plate, a carrier movable along said shaft, means mounted on said carrier for releasably clamping said mass of molten glass, and a drive means for moving up and down said carrier to and from a position which may enable said clamping means to reach said mass of molten glass.
Claim 3
Dependent Claim
59 words
The improvement as set forth in claim 1 wherein a rack is formed on and extending along one side of said shaft over the whole length thereof, and said carrier is slidably fitted over said shaft and has a gear wheel in mesh with said rack and a reversible motor for driving said gear wheel through a reduction gear.
Claim 4
Dependent Claim
41 words
The improvement as set forth in claim 1 or 2 wherein said clamping means is mounted on the free ends of a rotary arm so pivoted to said carrier as to swing about an axis in parallel with said stationary shaft.
Claim 5
Dependent Claim
23 words
The improvement as set forth in claim 3 wherein said carrier has a reversible motor which rotates said arm through a reduction gear.
Claim 6
Dependent Claim
35 words
The improvement as set forth in claim 1 wherein said clamp means has a pair of clamping members which are made of a heat-resisting alloy and have the upper ends adapted to open and close.
Claim 7
Dependent Claim
21 words
The improvment as set forth in claim 5 wherein the upper ends of said pair of clamping members have sawtooth blades.
Claim 8
Dependent Claim
56 words
The improvement as set forth in claim 5 or 6 wherein the bases of said pair of clamping members are securely connected to a pair of fingers, respectively, which are disposed at the upper end of an electromagnetic automatic switch disposed upright at the free end of said arm and which are electromagnetically opened or closed.
Claim 9
Dependent Claim
31 words
The improvement as set forth in claim 7, wherein an electromagnet is attached to the free end of said arm and said electromagnetic automatic switch is removably mounted on said electromagnet.
Claim 10
Dependent Claim
25 words
The improvement as set forth in claim 1 wherein means is provided for adjusting the angle of said stationary shaft with respect to the floor.
Claim 11
Dependent Claim
55 words
The improvement as set forth in claim 9 wherein said angle adjusting means comprises a rotating shaft to which is connected the lower end of said stationary shaft and which is supported horizontally relative to said floor, a worm wheel securely attached on said rotating shaft and a worm in mesh with said worm wheel.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-10-15 | 1983-04-16 | 1983-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-10-15 | 1987-04-16 | 1987-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-10-15 | 1991-04-16 | 1991-10-16 | $7700.00 | Window Closed / Lapsed |