Pressure-regulating airbag for embedding-type ink cartridge and the method for assembling it
US6739710B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 24, 2002 |
| Grant date | May 25, 2004 |
| Priority date | — |
| Expiry date | Dec 24, 2022 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2/17513
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
This specification discloses a negative pressure-regulating airbag for an embedding-type ink cartridge and its assembly method. In addition to a bag with a variable volume, the negative pressure-regulating airbag has a buckle ring, a plate, and a elastic element. The buckle ring is closely connected to the bag. A vent hole is formed in the middle of the buckle ring, allowing air to enter or escape the airbag when the ambient pressure changes. The buckle ring has a protruding part on the surface of the bag so as to be embedded into a preserved hole on an ink cartridge by pressing during the assembly. This forms a quick and tight connection between the airbag and the ink cartridge. One end of the elastic element is connected to the ink cartridge and the other end to the plate so that the plate imposes a force to depress the airbag. This keeps a negative pressure inside the cartridge to prevent ink leakage from the cartridge during transportation or use.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.