Compositions: coating or plastic – Coating or plastic compositions – Marking
Reexamination Certificate
2001-02-12
2004-03-16
Bell, Mark L. (Department: 1755)
Compositions: coating or plastic
Coating or plastic compositions
Marking
C106S031580
Reexamination Certificate
active
06706101
ABSTRACT:
TECHNICAL FIELD
The present invention relates to a double-color ink and a writing utensil using the same.
BACKGROUND ART
Double-color inks, when used in writing, are capable of producing a double-color writing (the contour line as shown in FIG.
1
(A)) by making an outline around the writing, and used for markers and fiber-tipped pens.
As such double-color inks are known, for example, those which consist of metal powder pigments, water-soluble dyes, water and permeable organic solvents; are used in writing and drawing onto permeable writing surfaces as of paper, fabrics, etc.; produce a contouring effect as the water-soluble dyes permeate and disperse around the writing formed by the metal powder pigments, as shown in FIG.
1
(B) (Japanese Unexamined Patent Publications No. 231777/1985, No. 123684/1986).
Thus, the conventional double-color inks utilize a double-color development mechanism shown in FIGS.
1
(A) and (B). It is common that two types of the coloring components are used in the double-color inks: the colorant which permeates paper and the like and the colorant which do not permeate, namely a water-soluble dye and a metal powder pigment, respectively.
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patent: 4604139 (1986-08-01), Shioi et al.
patent: 4657591 (1987-04-01), Shioi et al.
patent: 5474603 (1995-12-01), Miyashita et al.
patent: 6083311 (2000-07-01), Kanbayashi et al.
patent: 6120590 (2000-09-01), Miyamoto et al.
patent: 6275816 (2001-08-01), Hattori et al.
patent: 6422776 (2002-07-01), Nakatani
patent: 61 123685 (1986-06-01), None
Nakatani Yasunori
Yoshimura Yasuyuki
Bell Mark L.
Esq. Gloria Tsui-Yip
Faison Veronica F.
Miskin, Esq. Howard C.
Sakura Color Products Corp.
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