Printing method

Details Printing method Printing method

2000-09-08

2001-05-29

McPherson, John A. (Department: 1756)

Radiation imagery chemistry: process, composition, or product th

Imaged product

Nonsilver image

C430S009000, C430S332000, C430S334000, C430S346000, C430S967000

Reexamination Certificate

active

06238828

ABSTRACT:

TECHNICAL FIELD
This invention relates to a printing method, and particularly to a printing method which is preferably used for printing a desired pattern such as a character and a diagram on the outer surface of each of a plurality of stacked materials made of paper, resin, wood or rubber, clothes, food or the like or on both the outer surface and the internal tissues of thick materials made of paper, resin, wood or rubber, clothes, food or the like.
BACKGROUND ART
Conventionally there are several printing methods from a primary one such as to transfer ink applied to a printing plate into a surface of paper to a state-of-the-art one such as an application of photograph technique.
However, it is general for any of the conventional printing methods that printing is provided for a material to be printed one after another or that printing is provided for a continuous material to be printed and then the printed material is cut at a predetermined position one by one. Therefore, it has been difficult to print a company name or a company logotype on a material to be printed such as a slip pad after each pieces of paper has been bound into a book.
In addition, with the conventional printing methods printing is provided only for the outer surface of the material to be printed. Then it has been impossible for an application of a conventional printing technique to manufacture an article whose every cross section is printed with the same diagram or character such as “Kintaro candy” which is a bar-shaped candy whose every cross section has the same boy's face. This kind of product is manufactured by binding bar-shaped materials each of which has a different color and which are arranged parallel in a predetermined order and integrally uniting them. As a result of this, it is difficult to express a minute diagram or character.
The object of the invention is to provide an epockmaking printing method which can easily solve the above-mentioned problems.
DISCLOSURE OF INVENTION
To attain the above-mentioned object the invention has the following structure. The printing method in accordance with the invention is characterized by that a plurality of materials to be printed having a reacting species A at least on the outer surface thereof are stacked, and that radiation B which has penetrability and can develop, change or fade a color of the reacting species A is irradiated upon the materials to be printed toward the stacked direction so as to print generally the same pattern on each of the materials to be printed.
The invention is applied to articles of not only bound paper but also loose paper or other materials such as resin. The articles of bound paper are represented by, for example, a slip pad, a carbon-copied slip pad, a note book, a scratch pad, a calendar, an album, an address book, a telephone directory, a book, a news paper, an account book, a writing pad, a sum pad, a reporting pad, a scrapbook, a file or the like. In these articles of bound paper, paper constituting each pages or a mount of the article is the material to be printed in accordance with the invention. The articles of loose paper are represented by, for example, copy paper, heat-sensitive paper, sensitized paper, heat transferred-system paper for word processors, loose-leaf paper, drawing paper, tracing paper, a paper board, a corrugated box, an envelope, a greeting card, a post card, a name card, a label, a seal, a poster, or the like. The other materials made of resin or the like are represented by a file, a binder, a clear book, a clear holder, a film for over head projector, a desk pad, a ruler, a vinyl tape, a plastic board, a bag of polyvinyl chloride, a photograph, a roll of film, a plywood, an aluminum sheet, clothes such as a shirt and a handkerchief, or food such as a sliced piece of bread and cheese.
The printing method in accordance with the invention is characterized by that a material to be printed having a reacting species A both on the outer surface thereof and the internal tissues thereof is placed in a predetermined position, and that radiation B which has penetrability and can develop, change or fade a color of the reacting species A is irradiated from a certain direction upon the material to be printed so as to print generally the same pattern on both the surface and the internal of the material to be printed.
The material to be printed having a reacting species A on not only the outer surface thereof and but also the internal tissues thereof is represented by an eraser or food such as a candy which is cut or broken when eaten, bread, semicylindrical boiled fish paste and cheese.
The radiation B used in the printing method in accordance with the invention is preferably represented by X-rays. Followings are two preferable methods for irradiating radiation B. The first method is to form a through portion through which the radiation B penetrates and whose shape corresponds to a predetermined pattern on a printing plate which can prevent the radiation B from penetrating and then to irradiate the radiation B upon the material to be printed through the printing plate. The second method is to irradiate the radiation B in a beam and to move the position upon which the radiation B is irradiated corresponding to a pattern to be printed.
The reacting species A is represented by that comprising a substance which contains coloring matter C
1
or a precursor of coloring matter C
2
and which can be changed in its state of electron when the radiation B is irradiated thereupon. In this case, the reacting species A is changed in its state of electron when the radiation B is irradiated thereinto, thereby making a intermediate such as a cation and an electron, a cation and an anion, and a radical and a radical, leading a new reactions and developing a color of the precursor of coloring matter C
2
or changing or fading a color of the coloring matter C
1
so as to display a predetermined pattern. The reacting species A is represented by that comprising, for example, coloring matter C
1
alone, a precursor of coloring matter C
2
alone, coloring matter C
1
and a catalyst D as an initiator F, a precursor of coloring matter C
2
and a catalyst D, coloring matter C
1
, a catalyst D as an initiator F and a reacting substrate E, or a precursor of coloring matter C
2
, a catalyst D and a reacting substrate E. In this case, all or part of the coloring matter C
1
and the initiator F or all or part of the precursor of coloring matter C
2
and the initiator F is changed in its state of electron when the radiation B is irradiated thereupon, thereby making a intermediate as shown in
FIG. 1
, leading a new reaction, and developing a color of the precursor of coloring matter C
2
, or changing or fading a color of the coloring matter C
1
.
Reaction patterns of a reacting species A can be represented by the reaction pattern of color development as shown in FIG.
2
and the reaction pattern of color change or fading as shown in FIG.
3
.
As reaction patterns of color development as shown in
FIG. 2
, there is a case that a single molecule changes its structure to form a color developing structure in dyestuffs thereby to bring about a reaction of color development and the other case that a plurality of molecules are polymerized or decomposed to form a color developing structure in dyestuffs thereby to bring about a reaction of color development. The reacting species A is, as shown in
FIG. 2
, composed of a single material or of a plurality of different materials. As a case that the reacting species A is composed of a single material there can be represented by, for example, that comprising a precursor of coloring matter C
2
such as diacetylene carboxylic acid. As a case that the reacting species A is composed of a plurality of different materials there can be represented by, for example, that comprising an initiator F such as an onium salt, a phenol derivative, an initiator for electron resist, an initiator of polymerization (cation, anion or radical), an initiator for ultraviolet and scintillator, and a precursor of coloring matt

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