Compositions: coating or plastic – Coating or plastic compositions – Marking
Reexamination Certificate
2002-03-13
2004-01-06
Koslow, C. Melissa (Department: 1755)
Compositions: coating or plastic
Coating or plastic compositions
Marking
Reexamination Certificate
active
06673138
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a multi-color crayon or oil pastel and to a method of producing the same. More specifically, the invention relates to a multi-color crayon or oil pastel which features excellent drawing property, vividness of color and intimate adhesion of multi-color picture in combination, and to a method of producing the same.
2. Related Art of the Invention
Solid drawing materials have been known already combining materials of different color tones.
Japanese Examined Utility Model Publication (Kokoku) No. 2428/1964 discloses a color pencil in which a core material is formed by dispersing several kinds of mass-like core materials of different color tones in a color material of a basic color to thereby form a color surface of the core material which changes discretely on every transverse cross section, and the circumference thereof in the direction of length is surrounded by a core protection member (prior art a).
Further, Japanese Unexamined Utility Model Publication (Kokai) No. 86141/1976 discloses the structure of a color pencil having a core which is formed by laminating a plurality of core materials having different colors continuously and aslant (prior art b).
As for multi-color crayons, Japanese Unexamined Patent Publication (Kokai) No. 202361/1982 discloses a composite crayon of a given shape by blending two or more crayons of different colors like a pattern (prior art c).
Similarly, Japanese Unexamined Patent Publication (Kokai) No. 57683/1988 discloses a method of producing a crayon by blending several kinds of granular materials having different hues, filling a mold with the blend, and molding the blend with the application of a pressure (prior art d).
Further, Japanese Unexamined Utility Model Publication (Kokai) No. 60488/1992 discloses a multi-crayon obtained by molding crayons having red, yellow, blue, white, black and any other color into any desired shape (prior art e).
Japanese Unexamined Patent Publication (Kokai) No. 219840/2000 discloses a drawing material obtained by spirally arranging layers of different hues (prior art f).
Prior arts a and b are related to color pencils that are suited for drawing fine lines but are not suited for drawing thick lines or painting wide areas. In general, further, color pencils exhibit colors which are pale, and are not capable of producing vivid and intense color.
According to the prior arts a to e, there are used the same materials having different color tones. In this case, however, peeling occurs on an interface of different colors, and the drawing material in the form of a stick tends to be easily broken. Further, when it is attempted to adhere the materials of different colors on the interface, the colors are mixed together and become turbid.
In order to solve this problem according to the prior art f, the strength of the drawing material is improved by twisting together the materials of different hues in a spiral manner. This method can be applied to forming pencil cores and cores for ever-sharp pencils, that are obtained in a half-solid state without being melted, but can be applied with considerable difficulty to obtaining crayons, oil pastels, solid paints and rouges, which are obtained by once melting the materials followed by solidification by cooling and molding.
SUMMARY OF THE INVENTION
It is therefore an object of the present invention to provide a multi-color crayon or oil pastel which features excellent drawing property, vividness of color and intimate adhesion of multi-color picture in combination, and a method of producing the same.
Another object of the present invention is to provide a multi-color crayon or oil pastel which vividly expresses colors of tones different from that of a basic color which is broad and smooth, permits smooth drawing with these different colors, and features a sufficiently high degree of adhesion to the surface of the paper, yet maintaining a high degree of strength.
According to the present invention, there is provided a multi-color crayon or oil pastel comprising a continuous matrix of a crayon or oil pastel material and a plurality of kinds of granular coloring phases dispersed in the matrix, wherein the granular coloring phases are formed of a collapsible granular material which includes:
(A) a coloring matter of a hue different from that of the continuous matrix;
(B) a body; and
(C) a water-soluble or solvent-soluble high molecular material or a water-swelling clay mineral.
In the multi-color crayon or oil pastel of the present invention, it is desired that the collapsible granular material is porous, and has a particle diameter of from 0.05 to 2 mm.
According to the present invention, there is further provided a method of producing a multi-color crayon or oil pastel comprising:
a step of preparing a collapsible granular material by mixing (A) a coloring matter having a hue different from that of the crayon or oil pastel material, (B) a body, and (C) a solution of a water-soluble or solvent-soluble high molecular material or of a water-swelling clay mineral, drying the mixture and, as required, pulverizing and classifying the mixture; and
a step of dispersing a plurality of kinds of collapsible granular materials in the molten crayon or oil pastel material, followed by the injection molding to mold the mixture into a crayon or an oil pastel.
DETAILED DESCRIPTION OF THE INVENTION
A multi-color crayon or oil pastel of the present invention comprises a continuous matrix of a crayon or oil pastel material and a plurality of kinds of granular coloring phases dispersed in the matrix, wherein the granular coloring phases are formed of a collapsible granular material which includes (A) a coloring matter of a hue different from that of the continuous matrix, (B) a body, and (C) a water-soluble or solvent-soluble high molecular material or a water-swelling clay mineral.
In the multi-color crayon or oil pastel of the present invention, the crayon or oil pastel material is forming a continuous matrix which offers smoothly drawing property, intimate adhesion or fixing property to the paper and vivid picture as is widely known among people skilled in the art.
In the present invention, a plurality of kinds of granular coloring phases formed of collapsible granular materials are dispersed in the continuous matrix making it possible to form pictures of different hues due to the granular coloring phases in the band of a picture drawn by the continuous matrix.
The collapsible granular materials stand for those which maintain the form of granular materials in the continuous matrix of the crayon or oil pastel material, but are collapsed to assume a powdery form or a form close thereto in a state where a pressure or a sliding force is applied thereto at the time of drawing.
Due to the presence of the collapsible granular materials in the continuous matrix, the granular materials (granular coloring phases) dispersed in the sliding surface (drawing surface) of the multi-color crayon or oil pastel, are scattered in the powder and are pushed onto the paper so as to be intimately adhered to the paper by the action of a wax present in the crayon or oil pastel material of the continuous matrix.
In the present invention, it is very important that the granular coloring phase is present in the matrix as collapsible particles from the standpoint of vividness of the picture and intimate adhesion to the paper. The granular coloring phase which consists of strong particles is not almost transferred onto the surface of the paper and, hence, no picture is drawn (only a faint trace of drawing remains) or the granular coloring phase peels off the continuous phase.
Further, when the granular coloring phase doesn't exist, in the continuous matrix (the granular coloring phase exists independently), a powder may adhere to the surface of the paper due to the drawing which, however, never intimately adheres thereto.
It is also important that the granular coloring phase (collapsible particles) includes (A) a coloring matter of a hue differen
Kano Yoshimi
Seki Koji
Buncho Corporation
Faison Veronica F.
Koslow C. Melissa
Sherman & Shalloway
LandOfFree
Multi-color crayon or oil pastel and method of producing the... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Multi-color crayon or oil pastel and method of producing the..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multi-color crayon or oil pastel and method of producing the... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3212325