Hot melt ink supply system

Details Hot melt ink supply system Hot melt ink supply system

1987-04-28

1989-03-21

Goldberg, E. A.

Recorders

Performance of multiple functions of steam and gas engines

Pressure responsive element

346140R, G01D 900

Patent

active

048147869

ABSTRACT:
In the representative hot melt ink supply system described in the specification, a first hot melt ink supply reservoir maintains ink in molten condition during operation of the system and a second reservoir mounted with an ink jet head on a movable carriage communicates with the first reservoir through a flexible supply line. The ink in the supply line is normally kept in solid condition and, when a reduced level of ink is detected in the second reservoir, the supply line is heated to melt the ink in the line and a pump is actuated to transfer ink from the first reservoir to the second reservoir. To permit use of pigmented inks, each of the reservoirs is heated to provide a thermal gradient therein so as to maintain convective circulation of the ink. An ink circulation path is provided to cause convective circulation of pigmented ink in the ink jet head.

REFERENCES:
patent: 4490731 (1984-12-01), Vaught
patent: 4593292 (1986-06-01), Lewis
patent: 4607266 (1986-08-01), DeBonte

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