US3630705A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing flat glass on molten metal and apparatus therefor
Assignee: AGC Inc
•
Filing: 1969-05-19
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Granted: 1971-12-28
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Expires: 1989-05-19
Abstract
Abstract In the manufacture of flat glass by the ''''float process'''' in which glass is advanced and flattened in ribbon form on a molten metal bath, vibrations of sonic or ultrasonic frequencies are applied to members which are in contact, or may come in contact, with the glass ribbon afloat on the molten metal bath, thereby decreasing the friction between the glass and said members and preventing the glass from sticking to the members. The aforementioned members include, for example, glass-width regulating members, water-cooled fences, restrictor tiles or/and the sidewall linings of the elongated tank containing said molten metal bath.
Inventors
- 👤 Masaaki Owa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:17
CPC Classifications
C; C03; C03B; C03B18/00; C03B18/02; C03B18/04; C03B18/06
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
31 words
A method according to claim 1, wherein said vibrations are ultrasonic vibrations of the order of 16 to 250 kilocycles per second in frequency and 1 to 30 Mu in amplitude.
Claim 2
Dependent Claim
31 words
A method according to claim 1, wherein said vibrations are sonic vibrations of the order of 10 to 400 cycles per second in frequency and 20 to 200 Mu in amplitude.
Claim 3
Dependent Claim
102 words
In an apparatus for the manufacture of flat glass in the form of a ribbon, comprising a substantially sealed elongated tank containing a molten metal bath, means for feeding molten glass onto the bath and for advancing the glass in ribbon form along said bath, means confining the width of the glass ribbon arranged for contact with the lateral edges of the advancing glass ribbon, and means for withdrawing the gradually cooled and solidified glass ribbon from said tank, the improvement comprising a vibration source capable of imparting vibrations to said means in contact with the lateral edges of the glass ribbon.
Claim 4
Dependent Claim
43 words
An improved apparatus according to claim 4, wherein said means includes a pair of width-regulating members of a refractory material and disposed in mutually parallel relation in such a manner that they are in contact with the lateral edges of said glass ribbon.
Claim 5
Dependent Claim
34 words
An improved apparatus according to claim 4, wherein said means includes restrictor tiles of a refractory material and in contact with the glass immediately subsequent to the feeding thereof onto the molten metal bath.
Claim 6
Dependent Claim
22 words
An improved apparatus according to claim 4, wherein said means includes water-cooled fences located along the lateral edges of said glass ribbon.
Claim 7
Dependent Claim
23 words
An improved apparatus according to claim 4, wherein said means includes lining layers disposed on the inner surfaces of sidewalls of said tank.
Claim 8
Dependent Claim
22 words
An improved apparatus according to claim 5, wherein said width-regulating members are made of a material which is sparingly wettable by glass.
References Cited (Backward Citations)
US3467512A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-27 | 1975-06-28 | 1975-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-27 | 1979-06-28 | 1979-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-27 | 1983-06-28 | 1983-12-28 | $7700.00 | Window Closed / Lapsed |