Display for removable cartridge having measurable parameter
US6503012B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 31, 2001 |
| Grant date | Jan 7, 2003 |
| Priority date | — |
| Expiry date | Jun 28, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J11/0075
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A removable cartridge with sheets that are to be removed from the cartridge and used by an apparatus comprising a housing for containing the sheets which are to be sequentially used by the apparatus when the cartridge is inserted into the apparatus, means provided in the housing for permitting sheets to be fed by the apparatus from the cartridge, a display provided on the housing which is viewable by a user when the cartridge is removed from the apparatus to indicate the number of sheets remaining in the cartridge. The display comprises a plurality of selectable digit elements each of which corresponds to a particular number, each selectable digit element containing cholesteric liquid crystals when selectively activated indicate a number that corresponds to the number of sheets remaining in the cartridge, and provide a measurable parameter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.