Ink ejection printing apparatus comprising automatically actuated ejection orifice cap
US4045802A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 27, 1976 |
| Grant date | Aug 30, 1977 |
| Priority date | — |
| Expiry date | Jul 27, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D15/18
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An ink ejection head is moved to an inoperative position when the apparatus is de-energized. An electrical solenoid moves the cap to a retracted position as the ink ejection head approaches the inoperative position and another electrical solenoid or a spring moves the cap into injection orifice sealing engagement with the ink ejection head when the ink ejection head reaches the inoperative position. Damping means are disclosed for preventing impact of the cap against the ink ejection head which would cause erroneous ink ejection and resilient means are disclosed for ensuring sealing alignment of the cap against the ink ejection head.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.