Thermal ink jet printer
US4490728A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 7, 1982 |
| Grant date | Dec 25, 1984 |
| Priority date | — |
| Expiry date | Sep 7, 2002 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2002/14169
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A thermal ink jet printer is disclosed in which ink droplets are ejected from an orifice by the explosive formation of a vapor bubble within the ink supply due to the application of a two part electrical pulse to a resistor within the ink supply. The electrical pulse comprises a precurser pulse and a nucleation pulse; the precurser pulse preheats the ink in the vicinity of the resistor to a temperature below the boiling temperature of the ink so as to preheat the ink while avoiding vapor bubble nucleation within the ink supply and the subsequently occuring nucleation pulse very quickly heats the resistor to near the superheat limit of the ink.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.