Ink container having a pressure stabilizer module
US6758558B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 31, 2003 |
| Grant date | Jul 6, 2004 |
| Priority date | — |
| Expiry date | Jan 31, 2023 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2/17556
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The specification discloses an ink container having a pressure stabilizer module. The module contains an airtight membrane, a passive plate, and an elastic device. The airtight membrane separates a box into an ink chamber and an air chamber. The passive plate is connected to one side of the airtight membrane and to the elastic device. The elastic device is normally depressed or stretched to move the airtight membrane. The ink chamber is thus slightly extended outward and maintains a negative pressure. As the ink stored inside the ink chamber gets less, the elastic device provides a restoring force to push or drag the passive plate. The negative pressure is thus maintained within a specific range. The invention further uses a conic spiral spring to avoid ink waste.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.