US3801298A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Supporting and tempering bent glass plates
Assignee: Saint Gobain Industries SA
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Filing: 1972-03-21
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Granted: 1974-04-02
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Expires: 1992-03-21
Abstract
Abstract Method and apparatus for supporting and tempering hot glass plates horizontally by flows of cooling fluid applied to the surfaces thereof which comprises gripping the glass between upper and lower spaced supports of which substantially all of the lower conform fully to the curvature of the glass, and substantially all of the upper have only spot contact therewith.
Inventors
- 👤 A Bezombes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:21
CPC Classifications
C; C03; C03B; C03B27/00; C03B27/04; C03B27/044; C03B27/0442; C03B23/00; C03B23/02; C03B23/023; C03B23/03; C03B23/033
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
96 words
Apparatus for the tempering of hot bent glass comprising a series of spaced, upper and lower, opposed horizontally arranged, arcuate supports for the glass, of which the upper supports have generally a more gradual curvature than the glass and said lower supports so as to provide only spot contact of the upper supports with the upper surface of the glass near the transverse center thereof when the upper supports are otherwise in closely spaced relation to the glass, and means to blow cooling gases against the upper and lower surfaces of the glass between said supports.
Claim 2
Dependent Claim
96 words
Apparatus for the tempering of hot bent glass comprising a series of spaced, upper and lower, opposed horizontally arranged, arcuate supports for the glass, of which the upper supports have generally a more gradual curvature than the glass and said lower supports so as to provide only spot contact of the upper supports with the upper surface of the glass near the transverse center thereof when the upper supports are otherwise in closely spaced relation to the glass, and means to blow cooling gases against the upper and lower surfaces of the glass between said supports.
Claim 3
Dependent Claim
53 words
Apparatus according to claim 1 in which the lower series of supports conforms to the lateral curvatures of the glass and supports it throughout the width of the glass, and the first in the upper series of supports conforms fully to the lateral curvature of the glass to engage it throughout its width.
Claim 4
Dependent Claim
58 words
Apparatus according to claim 1 including pivot means mounting the arcuate supports, means to turn the supports in the pivot means, thereby changing the curvature of the supports effectively presented to the glass surface, and pivot means mounting the first support in the upper series of supports for pivotal movement independent of other supports in the upper series.
Claim 5
Dependent Claim
17 words
Apparatus according to claim 3 including means to vertically adjust the position of the last-named pivot means.
Claim 6
Independent Claim
96 words
A method of bending and tempering glass plates in a continuous operation which comprises heating the plates in sequence to bending and tempering temperature, resting the plates in sequence upon a bed of curved rods lying flat, raising the rods to upright position and thereby pressing the plate against a shaping surface, transferring the bent plate to a supporting bed of curved rods having the curvature of the bent plate, pressing the plates against the supporting rods at spots located in vertical alignment with the bent rods therebeneath, and tempering the plate by jets of air.
Claim 7
Independent Claim
96 words
A method of bending and tempering glass plates in a continuous operation which comprises heating the plates in sequence to bending and tempering temperature, resting the plates in sequence upon a bed of curved rods lying flat, raising the rods to upright position and thereby pressing the plate against a shaping surface, transferring the bent plate to a supporting bed of curved rods having the curvature of the bent plate, pressing the plates against the supporting rods at spots located in vertical alignment with the bent rods therebeneath, and tempering the plate by jets of air.
Claim 8
Dependent Claim
21 words
A method according to claim 5 in which the pressing spots are aligned in the direction of motion of the plate.
Claim 9
Dependent Claim
49 words
A method according to claim 5 in which all of the rods of the lower bed engage the whole width of the plate, and the pressure applied from above extends throughout the width of the glass in the first position at which the plate arrives in the tempering zone.
Claim 10
Dependent Claim
137 words
Apparatus for tempering a hot transversely curved glass plate comprising a lower series of spaced transversely extending, longitudinally curved rollers for supporting and longitudinally transporting said plate, the curvature of said rollers and plate being complementary, whereby each said roller engages the plate across the entire width thereof, a corresponding upper series of rollers above the plate, and rollers of the upper series having a curvatUre more gradual than and generally complementary to the curvature of the opposed rollers of the lower series and being vertically spaced from the latter along the crest of the curved plate a distance generally corresponding to the thickness of the plate and divergent therefrom laterally toward the edges of the plate, and means for simultaneously projecting a cooling fluid against the upper and lower surfaces of the plate between said rollers.
Claim 11
Dependent Claim
137 words
Apparatus for tempering a hot transversely curved glass plate comprising a lower series of spaced transversely extending, longitudinally curved rollers for supporting and longitudinally transporting said plate, the curvature of said rollers and plate being complementary, whereby each said roller engages the plate across the entire width thereof, a corresponding upper series of rollers above the plate, and rollers of the upper series having a curvatUre more gradual than and generally complementary to the curvature of the opposed rollers of the lower series and being vertically spaced from the latter along the crest of the curved plate a distance generally corresponding to the thickness of the plate and divergent therefrom laterally toward the edges of the plate, and means for simultaneously projecting a cooling fluid against the upper and lower surfaces of the plate between said rollers.
Claim 12
Dependent Claim
24 words
Apparatus as defined in claim 8 wherein the rollers of the lower series are curved upwardly to engage the concave surface of the plate.
Claim 13
Dependent Claim
17 words
Apparatus as defined in claim 8 comprising means for pivotally supporting said rollers adjacent the ends thereof.
Claim 14
Dependent Claim
59 words
Apparatus as defined in claim 8 wherein one said roller at one end of said upper series has a curvature complementary to the curvature of the opposing roller of the lower series to thereby engage the upper surface of the plate across the full width thereof and function as a baffle to impede upstream flow of the cooling fluid.
Claim 15
Dependent Claim
15 words
Apparatus as defined in claim 11 wherein said one roller is mounted for vertical adjustment.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-04-01 | 1977-10-01 | 1978-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-01 | 1981-10-01 | 1982-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-01 | 1985-10-01 | 1986-04-02 | $7700.00 | Window Closed / Lapsed |