Incremental printing of symbolic information – Ink jet – Fluid or fluid source handling means
Reexamination Certificate
1998-01-30
2001-12-25
Le, N. (Department: 2861)
Incremental printing of symbolic information
Ink jet
Fluid or fluid source handling means
C347S108000
Reexamination Certificate
active
06332678
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to an ink jet system containing an ink jet head for spraying hotmelt ink image-wise, means for keeping the hotmelt ink in a molten state in the head, and a guide system by means of which the head can be moved along a receiving sheet and to a rest station.
The use of hotmelt inks is known, for example, from U.S. Pat. No. 4,791,439, which describes an ink jet head which is filled with ink which is solid at room temperature. This solid ink is melted and brought to a temperature of 100° C. to 150° C. In order to print a receiving sheet with an ink jet head of this kind, the head is placed on a guide system, as described for example in EP-A-0 644 056 and moved perpendicular to the direction of advance of the receiving paper, the image being printed strip-wise on the receiving sheet. A disadvantage of the combined apparatus is that in the standby mode the ink jet head consumes a large amount of unnecessary energy, because the ink must be maintained in the molten state and because the head is exposed to the atmosphere and thus the heat dissipates very quickly to the surroundings.
SUMMARY OF THE INVENTION
Accordingly, an object of the present invention is to obviate or reduce these and other problems experienced by the prior art.
This object is achieved in an ink jet system according to the present invention, in which a rest station (
20
) is provided which comprises a space in which the ink jet head (
16
) can be at least partially disposed and which is provided with a heat-insulating material (
21
). As a result, the ink jet head in the standby mode is provided in a heat-insulated space so that the heat and power loss are reduced to a minimum.
REFERENCES:
patent: 4283730 (1981-08-01), Graf
patent: 4392146 (1983-07-01), Bovio et al.
patent: 4577200 (1986-03-01), Rix et al.
patent: 4791439 (1988-12-01), Guiles
patent: 5598199 (1997-01-01), Mielke
patent: 0644056 (1995-03-01), None
patent: 0704306 (1996-04-01), None
patent: 62-39246 (1987-02-01), None
Patent Abstracts of Japan, vol. 018, No. 398 (M-1645), Jul. 26, 1994, Tsutomu et al. “Ink jet recording device”. JP 06 115088.
Patent Abstracts of Japan, vol. 096, No. 004, Apr. 30, 1996, Yashusi et al. “Inkjet Recorder”, JP 07 323554 A.
Birch & Stewart Kolasch & Birch, LLP
Hsieh Shih-Wen
Le N.
Oce--Technologies B.V.
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