摘要:
A demand or impulse ink jet (14) ejects droplets (24) of hot melt ink. The hot melt ink is heated from a solid state to a liquid state in the jet prior to the ejection of droplets on demand. The ink is then cooled on striking the target. The ink may contain a wax.
摘要:
A demand ink jet employs removable cartridges (20) of hot melt ink. When the temperature of the ink within the cartridge (20) is raised, the ink melts and drains from the cartridge into the supply system (44, 42, 40, 36).
摘要:
A hot melt ink jet ink comprises a dispersed solid pigment which is formulated in a wax, or high molecular weight fatty acid or alcohol vehicle to form a hot melt ink which is solid at room temperature but liquid at above 80°C, that is under the usual conditions of use. In a preferred embodiment, dispersed graphite in a non-evaporative oil carrier, such as mineral oil, is formulated with candelilla wax, stearic acid and/or behenic acid.
摘要:
A hot melt impulse ink jet ink is disclosed which comprises a C 20 -C 24 acid or alcohol containing vehicle, preferably behenic acid, and a suitable coloring agent. One preferred ink comprises about 80% natural behenic acid, 15% of a ketone (such as stearone), 3% coloring agent, and 2% of a plasticizer intended to improve print quality. The inks are jettable at relatively high temperatures (80°-90°C) using impulse ink jet devices.