Incremental printing of symbolic information – Ink jet – Medium and processing means
Reexamination Certificate
1998-05-22
2001-07-03
Beatty, Robert (Department: 2852)
Incremental printing of symbolic information
Ink jet
Medium and processing means
C347S096000
Reexamination Certificate
active
06254230
ABSTRACT:
FIELD OF THE INVENTION
This invention relates to an ink jet apparatus and to a method of improving the image stability of the prints provided by ink jet printing.
BACKGROUND OF THE INVENTION
In the field of ink jet printing, there have existed long felt needs for making images waterfast and also durable against physical abrasion. One method practiced in the art is to laminate a clear film on the printed image after the image has been printed on a receiver. However, such a lamination method is time consuming and often produces undesirable waste due to print handling and unusable prints caused by the air bubbles trapped between the lamination sheet and the ink receiver. The lamination method also increases media and equipment costs because of the additional sheet and apparatus involved.
U.S. Pat. No. 5,635,969 discloses an ink jet printer that includes a print head for depositing an ink precursor on the ink recording medium. The ink precursor conditions the ink recording medium before colored ink spots are placed on the conditioned areas. The preconditioning of the recording medium can be used for reducing paper cockle and color bleed, for decreasing dry time, and for improving dot shape.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide an ink jet apparatus that produces prints with improved image stability and durability. It is a further object of the present invention to provide such an ink jet apparatus that is simple and inexpensive. It is a further object of the present invention to provide such an ink jet apparatus that operates in a time- and energy-efficient manner.
These objects are achieved by an ink jet printing apparatus for producing an image on an ink receiver, comprising: at least one ink reservoir for providing ink for printing the image; a first print head means coupled to an ink receiver and at least one ink reservoir, for producing disposing ink spots on the ink receiver; a fluid reservoir for providing a fluid for treating the ink spots disposed on the receiver; and a second print head means coupled to the ink receiver and the fluid reservoir, for depositing the fluid on the ink spots disposed on the ink receiver thereby improving the image quality, stability and durability of the image.
Images produced by the apparatus and method of the invention are waterfast and have good wet adhesion.
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Research Disclosure, vol. 365, Sep. 1994, Item 36544, II B. Hardeners.
Erdtmann David
Martin Thomas W.
Romano Charles E.
Wen Xin
Beatty Robert
Eastman Kodak Company
Wells Doreen M.
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