GB765767A - Improvements in or relating to the cracking of a sheet of glass throughout its thickness - Google Patents
Improvements in or relating to the cracking of a sheet of glass throughout its thicknessInfo
- Publication number
- GB765767A GB765767A GB1539/55A GB153955A GB765767A GB 765767 A GB765767 A GB 765767A GB 1539/55 A GB1539/55 A GB 1539/55A GB 153955 A GB153955 A GB 153955A GB 765767 A GB765767 A GB 765767A
- Authority
- GB
- United Kingdom
- Prior art keywords
- crack
- sheet
- face
- glass
- exposed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B33/00—Severing cooled glass
- C03B33/09—Severing cooled glass by thermal shock
Landscapes
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Laminated Bodies (AREA)
- Treatments Of Macromolecular Shaped Articles (AREA)
Abstract
765,767. Cracking glass. COMPAGNIES REUNIES DES GLACES ET VERRES SPECIAUX DU NORD DE LA FRANCE. Jan. 18, 1955 [Jan. 18, 1954], No. 1539/55. Drawings to Specification. Class 56 A plane or bent glass sheet is cracked throughout its thickness around a closed contour by initiating a crack in the skin of one face by a sudden heating of short duration localized along the closed contour, rapid cooling of that face and then the advancement of the crack by establishing a temperature difference between the two faces, the hotter being the one where the crank was initiated. The shape of the crack may be defined by masks leaving only a narrow portion of the sheet exposed; this is exposed to radiation from an electric heating element. The exposed surface may then be cooled by wiping with a damp cloth. The sheet may then be reversed and the surface having the incipient crack just immersed in a heated liquid bath. Alternatively the sheet need not be reversed but but may be placed on a support with the cracked face uppermost and whole of this face then heated by radiation from an electric heater. The crack may be filled by a thermoplastic resin having the same index of refraction as the glass whereby the crack is substantially invisible.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR765767X | 1954-01-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB765767A true GB765767A (en) | 1957-01-09 |
Family
ID=9182935
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1539/55A Expired GB765767A (en) | 1954-01-18 | 1955-01-18 | Improvements in or relating to the cracking of a sheet of glass throughout its thickness |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB765767A (en) |
-
1955
- 1955-01-18 GB GB1539/55A patent/GB765767A/en not_active Expired
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