US3607185A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for forming multibore tubing
Assignee: Corning Glass Works
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Filing: 1968-10-07
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Granted: 1971-09-21
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Expires: 1988-10-07
Abstract
Abstract Thin-walled multibore tubing have from about 10 to over 300 individual longitudinal bores is unitarily formed by drawing molten glass downwardly through a multiple bell orifice structure so as to provide a multiplicity of small diameter holes or bores having thin-walled partitions therebetween which produce an open frontal area of up to about 80 percent of the cross-sectional area of such tubing with a hole density of over 200 holes per square inch.
Inventors
- 👤 Carl D Andrysiak
- 👤 Richmond W Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:25
CPC Classifications
C; C03; C03B; C03B17/00; C03B17/04
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
47 words
A method of forming multiple-bore tubing as defined in claim 1 wherein air is supplied to said drawn tubing at one pressure between peripherally oriented interconnected openings, and air at another pressure is supplied between a plurality of interconnected openings equally spaced from the peripherally oriented openings.
Claim 2
Dependent Claim
26 words
A method of forming multiple-bore tubing as defined in claim 1 wherein a separate fluid supply is provided between the interconnected openings adjacent corner areas thereof.
Claim 3
Dependent Claim
36 words
A method of forming multiple-bore tubing as defined in claim 1 wherein air is supplied at on pressure intermediate peripherally oriented openings and increased air pressures are applied intermediate openings inwardly oriented from the peripheral openings.
Claim 4
Dependent Claim
33 words
A method of forming multiple-bore tubing as defined in claim 1 wherein a thicker flow of molten glass passes through central portions of each interconnected opening than adjacent the connected end portions thereof.
References Cited (Backward Citations)
US2131417A
Cited
US3121254A
Cited
US3268313A
Cited
US3240583A
Cited
US3275428A
Cited
US3291584A
Cited
US3303011A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |