Packaging quality control method and apparatus
US4553847A · kind A · utility
11Cited by
8References
29Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 24, 1982 |
| Grant date | Nov 19, 1985 |
| Priority date | — |
| Expiry date | Nov 24, 2002 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA24C5/3412
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
The quality of a product, for example the degree of filling of cigarette papers, is non-destructively tested using reflectivity measurement. Compensation is provided for the effects of stray light in the measuring zone and the signals commensurate with the measurements performed on individual units of the object being tested are compared with the average of signals obtained through measurements performed on a preselected number of units of acceptable quality. The state of operability of the test apparatus may be self-checked during incremental periods between the testing of units.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.