Methods and apparatus for testing the quality of an ultrasonic weld in thermoplastic material
US4410381A · kind A · utility
8Cited by
15References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 26, 1982 |
| Grant date | Oct 18, 1983 |
| Priority date | — |
| Expiry date | Jan 26, 2002 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C66/8322
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Ultrasonically welded thermoplastic materials are nondestructively inspected by sensing the infrared radiation emitted from the weld region of the material during or immediately subsequent to the welding operation. The sensed radiation levels are compared with a predetermined value and if they exceed the predetermined value are indicative of an acceptable weld. If the sensed radiation peak does not exceed the predetermined level, the weld is deemed to be unacceptable.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.