US3801423A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple glazing panel and manufacturing method therefor
Assignee: AGC Glass Europe SA
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Filing: 1971-06-01
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Granted: 1974-04-02
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Expires: 1991-06-01
Abstract
Abstract A panel, and the manufacturing process therefor, having two sheets of glass or vitrocrystalline material joined in facing relation, that face of one sheet which constitutes an external face of the panel being chemically tempered to induce compressive stresses therein and being weakened to reduce its resistance to breakage due to flexures of the type which apply tensile forces thereacross.
Inventors
- 👤 Laethem R Van
- 👤 P Baudin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:13
CPC Classifications
B; B32; B32B; B32B1/00; B32B17/00; B32B17/06; B32B17/10; B32B17/10005; B32B17/10009; B32B17/10018; B32B17/10036; B32B17/1055; B32B17/10761; B32B17/10807; B32B17/10899; B32B17/10981; B32B27/00; B32B27/30; B32B27/306; C; C03; C03B; C03B23/00; C03B23/02; C03B23/023; C03C; C03C21/00; C03C23/00; E; E04; E04C; E04C2/00; E04C2/54; B32B2329/00; B32B2329/06; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24355; Y10T428/24471; Y10T428/24479; Y10T428/24521; Y10T428/24777; Y10T428/24942; Y10T428/2495; Y10T428/26; Y10T428/261; Y10T428/31; Y10T428/31504; Y10T428/31507; Y10T428/31551; Y10T428/31627; Y10T428/3163; Y10T428/31645; Y10T428/31649
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
38 words
An arrangement as defined in claim 1 wherein the tensile strength of said first sheet in at least one region thereof is substantially uniformly lower than the tensile force necessary for reducing said compressive stresses therein to zero.
Claim 2
Dependent Claim
37 words
An arrangement as defined in claim 1 wherein the said tensile strength of said first sheet is substantially lower over the whole area thereof than the tensile force necessary for reducing said compressive stresses therein to zero.
Claim 3
Dependent Claim
27 words
An arrangement as defined in claim 1 wherein said one face of said first sheet bears surface abrasions in at least one region of said first sheet.
Claim 4
Dependent Claim
27 words
An arrangement as defined in claim 1 wherein said one face of said first sheet bears surface scratches in at least one region of said first sheet.
Claim 5
Dependent Claim
34 words
An arrangement as defined in claim 5 wherein said one face of said first sheet is provided in at least one region thereof with surface grooves having a depth of less than 5 microns.
Claim 6
Dependent Claim
29 words
An arrangement as defined in claim 1 wherein said first sheet is of glass and external layers of said first sheet at said one face thereof contain fluorine ions.
Claim 7
Dependent Claim
41 words
An arrangement as defined in claim 1 wherein said tensile strength of at least one region of said first sheet is less than 50 kg/mm2 as measured on a disc of the material of said first sheet 11 cm in diameter.
Claim 8
Dependent Claim
47 words
An arrangement as defined in claim 1 wherein there is a second main sheet constituting another one of said components, said first sheet is in facing relationship to said second sheet, and said first and second sheets are directly connected only at the margins of said panel.
Claim 9
Dependent Claim
22 words
An arrangement as defined in claim 1 wherein said sheet components of said panel are secured together over their entire surface area.
Claim 10
Dependent Claim
88 words
An arrangement as defined in claim 1 wherein there is a second main sheet constituting another one of said components, said first sheet is in facing relationship to said second sheet, and said second sheet is arranged to be flexed toward said first sheet, by a flexing force acting against the face of said second sheet which is directed away from said first sheet, to cause said second sheet to impose flexing forces on said first sheet sufficient to break said first sheet before said second sheet breaks.
Claim 11
Dependent Claim
36 words
An arrangement as defined in claim 1 wherein said first sheet is held in said panel in a state of elastic flexure such that its outer face is in a state of tension or reduced compression.
Claim 12
Dependent Claim
40 words
An arrangement as defined in claim 1 wherein there is a second main sHeet constituting another one of said components, said first sheet is in facing relationship to said second main sheet and said second sheet is of plastic material.
Claim 13
Dependent Claim
42 words
An arrangement as defined in claim 1 wherein said components include in addition to said first sheet, only one second main sheet of an at least substantially vitreous material, and said first sheet is in facing relationship to said second main sheet.
Claim 14
Dependent Claim
76 words
An arrangement as defined in claim 14 wherein the relative inherent strengths of said first and second sheets are such that, independently of each other, the resistance of said first sheet to breakage by flexure subjecting its said one face to tensioning forces is higher than the resistance of said second sheet to breakage by flexure which subjects to tensioning forces the face of said second sheet which faces said first sheet in the assembled panel.
Claim 15
Dependent Claim
55 words
An arrangement as defined in claim 14 wherein said second sheet is of glass and over at least one region of said second sheet its face which faces inwardly in said panel is substantially free from flaws liable to cause stress concentrations when tensioning forces are applied to said inner face of said second sheet.
Claim 16
Dependent Claim
21 words
An arrangement as defined in claim 14 wherein external layers of said second sheet at said inner face are compressively stressed.
Claim 17
Dependent Claim
36 words
An arrangement as defined in claim 17 wherein said compressive stressing of said external layers at said inner face of said second sheet is due at least in part to said second sheet being chemically tempered.
Claim 18
Dependent Claim
43 words
An arrangement as defined in claim 17 wherein said second sheet is held in said panel in a state of elastic flexure in a direction such that compressive stresses are present in said external layers of said second sheet due to such flexure.
Claim 19
Dependent Claim
34 words
An arrangement as defined in claim 19 further comprising a frame in which said sheet components are held in such a manner that said second sheet is held in said state of elastic flexure.
Claim 20
Dependent Claim
27 words
An arrangement as defined in claim 19 wherein said second sheet is held in said state of elastic flexure at least in part by said first sheet.
Claim 21
Dependent Claim
79 words
An arrangement as defined in claim 14 wherein said second sheet is chemically tempered, the tensile strength of at least one region of said second sheet, expressed in terms of the tensile force, imposable by flexing said second sheet, which can be sustained by the compressively stressed external layers in the face of said second sheet facing away from said first sheet in said panel, being less than the tensile force necessary for reducing such compressive stresses to zero.
Claim 22
Dependent Claim
31 words
An arrangement as defined in claim 22 wherein said second sheet bears surface abrasions over substantially the whole of the face thereof facing away from said first sheet in said panel.
Claim 23
Dependent Claim
26 words
An arrangement as defined in claim 22 wherein second sheet bears surface scratches over the face thereof facing away from said first sheet in said panel.
Claim 24
Dependent Claim
30 words
An arrangement as defined in claim 22 wherein said first and second sheets have said lower tensile strengths at regions which are in registry with each other in said panel.
Claim 25
Dependent Claim
24 words
An arrangement as defined in claim 14 further comprising at least one intervening sheet of organic material securing said first and second sheets together.
Claim 26
Dependent Claim
46 words
An arrangement as defined in claim 26 wherein said intervening sheet is of a thermoplastic selected from the group consisting of polyvinyl butyral, polyvinyl chloride and a polycarbonate of a bis-phenol and having each of said first and second sheets attached to a respective surface thereof.
Claim 27
Dependent Claim
48 words
An arrangement as defined in claim 26 wherein said intervening organic sheet is arranged to resist penetration or tearing when at least one of said first and second sheets breaks under the impact of a rounded object weighing 10 kg dropped from a height of about 620 cm.
Claim 28
Dependent Claim
17 words
An arrangement as defined in claim 14 wherein said second sheet is thinner than said first sheet.
Claim 29
Dependent Claim
37 words
An arrAngement as defined in claim 29 wherein said first sheet has a thickness in the range of 1.5 to 4.0 mm and said second sheet has a thickness in the range of 1.0 to 2.5 mm.
Claim 30
Dependent Claim
28 words
An arrangement as defined in claim 1 further comprising a covering sheet covering said one face of said first sheet, said covering sheet not being a strength member.
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 |