Ribbon indicia system
US4797016A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 20, 1987 |
| Grant date | Jan 10, 1989 |
| Priority date | — |
| Expiry date | Feb 20, 2007 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J35/18
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A web, such as a ribbon in a printer, is provided with bar code markings arranged thereon to provide selected information, such as ribbon footage used and ribbon type. A printing fluid applied to the ribbon may be provided with particles having magnetic properties which are readable by a magnetic static read head wherein the presence of the magnetic printing fluid in the vicinity of magnetic gaps in such a head completes magnetic circuitry. Also, such printing fluid may be provided with fluorescent pigmentation, thereby affording optical sensing. In a printer embodiment, a mechanism is shown for synchronizing the output signals of the bar code sensors with a distance measuring device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.