US3652246A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for coating hot glass
Assignee: PPG Industries Inc
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Filing: 1969-10-27
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Granted: 1972-03-28
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Expires: 1989-10-27
Abstract
Abstract Apparatus for coating a surface of a newly formed ribbon of float glass immediately after delivering the ribbon from a bath containing molten tin, while the glass surface is at a temperature sufficiently high to pyrolize said composition to form a metal oxide coating thereon of sufficient thickness to provide the coated glass with desired properties, such as reducing the transmission of certain wave lengths of light in one or more desired wavelength bands through the coated sheet or making the coated sheet electroconductive.
Inventors
- 👤 Joseph E Michelotti
- 👤 Vern A Henery
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:52
CPC Classifications
C; C03; C03C; C03C17/00; C03C17/001; C03C17/002; C03B; C03B18/00; C03B18/02; C03B18/12
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
53 words
a spray chamber located beyond said first chamber a distance sufficiently close to enable said newly formed ribbon to arrive at said spray chamber at a temperature sufficiently high to cause a film forming composition to react to form a metal oxide coating when said composition contacts said ribbon at said spray chamber,
Claim 2
Dependent Claim
32 words
Apparatus as in claim 1, wherein said segregating means comprise a flexible curtain of a heat-resistant material that does not mar the surface of a hot glass ribbon on sliding contact thereover.
Claim 3
Dependent Claim
13 words
means for preventing the atmosphere above said bath from entering said spray chamber,
Claim 4
Dependent Claim
49 words
Apparatus as in claim 1, wherein said composition applying means comprises means for applying a liquid composition and is located in said spray chamber a distance from said path sufficiently short so that said composition leaving said composition applying means contacts said ribbon before said composition is completely volatilized.
Claim 5
Dependent Claim
33 words
Apparatus as in claim 1, wherein said composition applying means is located above said given path and is oriented toward the upper surface of said ribbon as the latter traverses said spray chamber.
Claim 6
Dependent Claim
11 words
an annealing lehr located beyond and adjacent to said spray chamber,
Claim 7
Dependent Claim
16 words
means for preventing the flow of an atmosphere between said spray chamber and said annealing lehr,
Claim 8
Dependent Claim
50 words
Apparatus as in claim 4, wherein said composition applying means comprises spraying means, and means for reciprocating said spraying means along an axis transverse to the direction of said chosen path in a plane spaced from the upper surface of said ribbon while the latter is conveyed along said path.
Claim 9
Dependent Claim
28 words
Apparatus according to claim 5, wherein said spray chamber comprises a pair of vacuum hoods flanking said transverse axis for evacuating excess spraying composition from said spray chamber.
Claim 10
Dependent Claim
21 words
transporting means for conveying said newly formed ribbon from said first chamber and through said spray chamber and said annealing lehr,
Claim 11
Dependent Claim
67 words
means in said spray chamber for applying said film forming composition at a controlled rate to a surface of said float glass ribbon immediately after delivering said float glass ribbon to said spray chamber, said last named means being located at a distance from the surface of the ribbon to be coated sufficiently close to said surface for said coating composition to react upon contacting said surface,
Claim 12
Dependent Claim
46 words
Apparatus according to claim 5, said delivery means comprising flexible means to supply volatile ingredients of said film forming composition to said spraying means, and means to maintain said ingredients in a non-volatile state until said ingredients are delivered into the atmosphere of said spray chamber.
Claim 13
Dependent Claim
27 words
Apparatus according to claim 7, wherein said last named means comprises insulation encasing said flexible means to supply said ingredients and insulation wrapped around said spraying means.
Claim 14
Dependent Claim
17 words
means to deliver said film forming composition to said composition applying means within said spray chamber, and
Claim 15
Dependent Claim
25 words
means to maintain said composition insulated from direct exposure to environmental heat within said spray chamber until it is delivered from said composition applying means.
Claim 16
Dependent Claim
24 words
Apparatus as in claim 7, further including valve means for starting or stopping the flow of said ingredients to said spraying means as desired.
Claim 17
Dependent Claim
34 words
Apparatus as in claim 5, further including means for removing said spraying means to one side of said spray chamber to permit maintenance of said spraying means without disturbing the production of float glass.
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) | 1975-03-28 | 1975-09-27 | 1976-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-28 | 1979-09-27 | 1980-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-28 | 1983-09-27 | 1984-03-28 | $7700.00 | Window Closed / Lapsed |