Incremental printing of symbolic information – Ink jet – Medium and processing means
Reexamination Certificate
1998-06-26
2001-05-22
Hilten, John S. (Department: 2854)
Incremental printing of symbolic information
Ink jet
Medium and processing means
C347S096000, C347S103000, C347S105000
Reexamination Certificate
active
06234625
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to methods and apparatus for providing a high quality colorant images on a receiver.
BACKGROUND OF THE INVENTION
To enhance the quality of the images printed by an ink jet printer, it is often desirable to treat the surface of the ink receiver with a fluid prior to ink jet printing. For example, U.S. Pat. No. 5,635,969 discloses a print head that pre-conditions the ink receiver with a treatment fluid that immobilizes the ink spots printed on the receiver. This technique, however, requires electrically driving the print head to deliver the treatment fluid to the ink receiver. The technique consumes power and its reliability can also be affected by the failure of the fluid chambers and nozzles in the print head.
SUMMARY OF THE INVENTION
An object of this invention is to provide a printing apparatus including capability of treating the receiver for enhanced image structure.
A further object of this invention is to provide receiver treatment without requiring the use of power during the treatment.
An additional object of the present invention is to provide receiver treatment that is reliable.
These objects are achieved by apparatus for forming a colorant image with improved image structure on a receiver in response to a digital image, comprising:
a) print head means responsive to the digital image for transferring colorant to the receiver;
b) passive fluid delivering means for delivering treatment fluid to the receiver, the treatment fluid being selected to improve image structure; and
c) means for providing relative movement between the receiver and the print head means so that colorant is transferred to the receiver to provide the colorant image corresponding to the digital image on the receiver which has improved image structure.
ADVANTAGES
An advantage of this invention is that the power is reduced for producing an image on a receiver.
Another advantage of this invention is that the reliability of the receiver treatment is improved.
A further advantage of this invention is that different treatment fluids can be selected which are compatible with improving different aspects of image structure.
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Chau Minh H.
Eastman Kodak Company
Hilten John S.
Owens Raymond L.
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