Laminated film for ink reservoir
US5450112A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 23, 1992 |
| Grant date | Sep 12, 1995 |
| Priority date | — |
| Expiry date | Dec 23, 2012 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2002/17516
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
An ink cartridge for a thermal ink jet printer containing a separate collapsible ink reservoir which is kept under negative pressure by a pressure regulator to prevent ink leakage. The collapsible reservoir has one or more flexible sidewalls connected at their periphery to form an ink reservoir, wherein said sidewalls include a plurality of layers. The pressure regulator comprises a pair of spaced parallel side plates urged apart by a spring toward the adjacent reservoir sidewalls whereby the reservoir is collapsible against the spring pressure to an essentially flat shape to permit substantially complete dispensation of ink from the reservoir.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.