US3607173A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for heat treating sheets of glass
Assignee: Permaglass Inc
•
Filing: 1969-03-14
•
Granted: 1971-09-21
•
Expires: 1989-03-14
Abstract
Abstract A method and apparatus for treating sheets of glass. The apparatus illustrated for carrying out the invention includes an elongated furnace with an elongated support bed disposed in the furnace and having gas inlets to emit gases against the sheet to effect a heat transfer between the sheet and the gases and gas outlets for gases to pass through after contacting the sheet. A plurality of inspirators are spaced along the bed and each inspirator has an opening to draw ambient gases within the furnace thereinto and an exit for directing the gases to the inlets in the bed. A source of pressurized gases is connected through various conduits to the inspirators. The conduits supplying the pressurized gases are disposed in coils in the furnace for heating the pressurized gases prior to the injection thereof into the inspirators.
Inventors
- 👤 Robert G Mcmaster
- 👤 Stanley W Joehlin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:32
CPC Classifications
C; C03; C03B; C03B29/00; C03B29/04; C03B29/06; C03B29/08; C03B29/12; C03B35/00; C03B35/14; C03B35/22; C03B35/24; Y; Y02; Y02P; Y02P40/00; Y02P40/50; Y02P40/57
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
42 words
A method as set forth in claim 1 including circulating the gases under pressure through the enclosure in a flow separate from the ambient gases for heating thereof simultaneously with the heating of the ambient gases and by the same heating means.
Claim 2
Dependent Claim
31 words
A method as set forth in claim 2 including retaining a major portion of the gases emitted from the inlets within the enclosure for reheating thereof and recirculation through the passageway.
Claim 3
Independent Claim
126 words
An apparatus for treating a sheet of glass comprising; an enclosure, a bed supported in said enclosure and having gas inlets therein, said bed including at least one plenum chamber means in fluid communication with said inlets, fluid passageway means having an opening in communication with ambient gases within said enclosure and an exit in communication with said plenum chambEr means, a source of pressurized gases for providing gases for injection of a jet into said passageway means to inspirate ambient gases into said passageway means through said opening and into said plenum chamber means for supplying gases to said inlets, and heating means for heating the ambient gases within said enclosure and for heating the pressurized gases before being injected into said fluid passageway means.
Claim 4
Dependent Claim
38 words
An apparatus as set forth in claim 4 wherein said fluid passageway means includes a throat and decreases in cross-sectional area from said opening to said throat and increases in cross-sectional area from said throat to said exit.
Claim 5
Dependent Claim
42 words
An apparatus as set forth in claim 4 including circulating means for circulating said pressurized gases through said enclosure in a flow separate from said ambient gases for heating thereof by said heating means simultaneously with the heating of said ambient gases.
Claim 6
Dependent Claim
26 words
An apparatus as set forth in claim 6 wherein said heating means includes a plurality of combustion burners and said circulating means includes coils of conduit.
Claim 7
Dependent Claim
49 words
An apparatus as set forth in claim 4 wherein said bed is made of a ceramic material and includes said plenum chamber means, and wherein said passageway means and said injection means define an inspirator, and including a plurality of said inspirators in communication with said plenum chamber means.
Claim 8
Dependent Claim
18 words
An apparatus as set forth in claim 8 wherein said passageway means are disposed in a ceramic material.
Claim 9
Dependent Claim
27 words
An apparatus as set forth in claim 9 wherein said ceramic materials of said bed and defining said passageway means have substantially equal coefficients of thermal expansion.
Claim 10
Dependent Claim
25 words
An apparatus as set forth in claim 10 wherein said passageway means of more than one inspirator are disposed in a first integral ceramic member.
Claim 11
Dependent Claim
20 words
An apparatus as set forth in claim 11 wherein said first ceramic member is in sealing relationship with said bed.
Claim 12
Dependent Claim
22 words
An apparatus as set forth in claim 12 wherein each injection means is defined by a nozzle passage disposed in ceramic material.
Claim 13
Dependent Claim
25 words
An apparatus as set forth in claim 13 wherein said nozzle passages of more than one inspirator are disposed in a second integral ceramic member.
Claim 14
Dependent Claim
51 words
An apparatus as set forth in claim 14 wherein said first ceramic member and said passageway means defined thereby extend upwardly from said bed adjacent one extremity of said bed, and means interconnecting said ceramic members and supporting said second ceramic member in spaced relationship and above said first ceramic member.
Claim 15
Dependent Claim
27 words
An apparatus as set forth in claim 12 wherein said bed is supported by said first ceramic member and coacts therewith to define said plenum chamber means.
Claim 16
Dependent Claim
28 words
An apparatus as set forth in claim 16 wherein said passageway means defined by said first ceramic member extend generally horizontally below the upper extremity of said bed.
Claim 17
Dependent Claim
20 words
An apparatus as set forth in claim 8 wherein each of said passageway means is defined by a metal member.
Claim 18
Dependent Claim
28 words
An apparatus as set forth in claim 18 including sealing means between each metal member and said ceramic bed for compensating for the difference in thermal expansion therebetween.
Claim 19
Dependent Claim
18 words
An apparatus as set forth in claim 19 wherein said means includes a pair of spherical coacting surfaces.
Claim 20
Dependent Claim
25 words
An apparatus as set forth in claim 19 wherein each of said metal members extends upwardly from said bed adjacent one extremity of said bed.
Claim 21
Dependent Claim
17 words
An apparatus as set forth in claim 19 wherein each of said metal members extends generally horizontally.
Claim 22
Dependent Claim
53 words
An apparatus as set forth in claim 4 wherein said enclosure includes a roof and said heating means supplies heat adjacent said roof, said passageway means extends upwardly from said bed whereby the hotter ambient gases in the upper regions of said enclosure are drawn into said passageway means through said opening thereof.
Claim 23
Dependent Claim
27 words
An apparatus as set forth in claim 23 including a conduit extending upwardly from said injection means and Through said roof to a selectively capped upper end.
Claim 24
Dependent Claim
50 words
An apparatus as set forth in claim 23 including coils of conduit supported in said enclosure adjacent said roof for circulating said pressurized gases through said enclosure in a flow separate from said ambient gases for heating thereof by said heating means simultaneously with the heating of said ambient gases.
Claim 25
Dependent Claim
71 words
An apparatus as set forth in claim 4 wherein said enclosure includes a floor and said heating means supplies heat adjacent said floor, said bed being supported in spaced relation to and above said floor, said passageway means extends generally horizontally and below the upper extremity of said bed whereby the hotter ambient gases in the lower regions of said enclosure are drawn into said passageway means through said opening thereof.
Claim 26
Dependent Claim
26 words
An apparatus as set forth in claim 26 including a conduit extending horizontally from said injection means and through said enclosure to a selectively capped end.
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) | 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 |