Thermal drop-on-demand ink jet print head
US4792818A · kind A · utility
16Cited by
5References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 12, 1987 |
| Grant date | Dec 20, 1988 |
| Priority date | — |
| Expiry date | Jun 12, 2007 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2/14129
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A thermal drop-on-demand ink jet print head in which a heat delay means is provided covering a predetermined part of the resistive element. Upon connection of an electrical signal to energize the resistive element, nucleation occurs at an uncovered location on the resistive element and formation of the bubble proceeds in a direction toward the covered part of the resistive element to thereby utilize the inertial effect of the controlled bubble motion to eject a drop of ink in a more energy-efficient manner.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.