Obstructed-field-indicia-sensing device
US4864631A · kind A · utility
15Cited by
20References
22Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 16, 1988 |
| Grant date | Sep 5, 1989 |
| Priority date | — |
| Expiry date | Feb 16, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41F33/0081
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method and apparatus for detecting predetermined register indicia on a moving web of material having an obstructing field of indicia positioned about the register indicia.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.