Title:
METHOD OF RELIABLY DETECTING SEAL FAILURES
Document Type and Number:
WIPO Patent Application WO2001036827
Kind Code:
A3
Abstract:
A method for detecting seal failures during manufacture of an insulated glass unit. In this method, a partially assembled glass unit is placed within an enclosure and the enclosure is sealed with the partially assembled glass unit therein. An insulating gas is flowed into and an insulating gas/air mixture is exhausted from the enclosure until the concentration of insulating gas within the enclosure reaches a predetermined value. The pressure within the interpane space is adjusted to a predetermined ambient gauge pressure which represents a predetermined offset from ambient atmospheric pressure. The panes are pressed against the spacer, sealing the interpane space to yield a sealed insulated glass article. Surface profiles of the first and second panes of the sealed insulated glass article are measured to determine a thickness profile. A fault indicator is generated if the thickness profile does not show at least a predetermined deviation of the thickness profile from a predetermined baseline profile.
Inventors:
TRPKOVSKI PAUL (US)
Application Number:
PCT/US2000/042214
Publication Date:
December 13, 2001
Filing Date:
November 16, 2000
Export Citation:
Assignee:
CARDINAL IG CO (US)
TRPKOVSKI PAUL (US)
TRPKOVSKI PAUL (US)
International Classes:
C03C27/06; E06B3/677; G01M3/26; G01M3/36; (IPC1-7): E06B3/677; G01M3/36
Domestic Patent References:
| WO1999022106A1 | 1999-05-06 | |||
| WO1996020328A1 | 1996-07-04 |
Foreign References:
| AT200310B | 1958-10-25 | |||
| EP0467632A1 | 1992-01-22 | |||
| EP0276647A2 | 1988-08-03 |
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