Manufacturing container or tube from paper; or other manufacturi – Container making – Pliable container
Patent
1997-11-03
1999-10-05
Coan, James F.
Manufacturing container or tube from paper; or other manufacturi
Container making
Pliable container
493188, 283113, 162110, 162140, 162108, B31B 188
Patent
active
059614323
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to anti-falsification paper and a method of manufacture thereof, and more specifically to anti-falsification paper, called "thread-inserted, window paper," in which a thread inserted between combined paper layers making up the anti-falsification paper is exposed at windows provided in the outermost paper layer, and to a method of making such anti-falsification paper.
BACKGROUND ART
Anti-falsification paper called "thread-inserted paper" is well known, in which an elongate element is inserted in the thickness of the paper. A typical example of the elongate element is a thread described hereinbelow. Paper with inserted threads requires very sophisticated technologies to manufacture and thus has a significant effect for anti-falsification. It is therefore widely used for making bank notes in many countries.
Thread-inserted paper may be classified largely into two categories. The first is the paper which has an elongate element embedded therein so that it is not exposed to the surface of the paper. The second is the one called "thread-inserted, window paper," in which a part of the inserted elongate element is exposed to the surface of the paper.
A variety of methods have been proposed for making the first category of paper. They include a method disclosed in Japanese Patent Laid-Open Specification No. 51-130309/1976, in which a nozzle is laid in the flow of paper stock in a slice portion of a Fourdrinier paper machine and an elongate element is supplied through the nozzle along with running water so as to be embedded in a web deposited on a wire cloth. A method is disclosed in Japanese Patent Laid-Open Specification No. 2-169790/1990, in which an elongate element incorporating device is used to incorporate an elongate element into the paper stock flowing from a flow box of a Fourdrinier paper machine by supplying the elongate element with an air flow that keeps the elongate element and the stock out of contact with each other. Also a method is disclosed in Japanese Patent Publication No. 5-40080/1993, in which a cylinder paper machine having two or more vats is used to combine two or more paper layers and an elongate element is fed from a pipe having projections and recesses in its inner wall to be inserted between the paper layers.
As the methods of making the second category of paper, the "thread-inserted, window paper", there is proposed a method disclosed in Japanese Patent Publication No. 5-85680/1993, in which a grooved belt mechanism with an elongate element passed through a raised end of a guide having recessed and raised portions is immersed in a suspension of paper stock on wire cloth. A method is disclosed in U.S. Pat. No. 4,462,866, in which a wire mesh having raised portions is used for a face wire of a cylinder paper machine and an elongate element is incorporated in the thickness of paper as the elongate element is fed in contact with the raised portions of the wire mesh so that the elongate element is incorporated in paper and exposed at window portions. Also, a method is disclosed in Japanese Patent Specification Laid-Open No. 6-272200/1994, in which a compressed air nozzle is installed in a rotating drum of wire cloth in a Fourdrinier paper machine to intermittently blow away pulp slurry deposited over an elongate element embedded in web so that the elongate element is exposed.
"Watermarked paper" having watermarks of letters or pictures also requires a high level of technology to manufacture and has long been used for anti-falsification. Because the anti-falsification effectiveness increases with the number of anti-falsification means employed in the anti-falsification paper, a variety of anti-falsification paper has been developed which combine the above-mentioned "thread-inserted, window paper" technology with the "watermarking" technology. One such example is sterling notes used in England, which has thread-inserted windows at predetermined locations and a watermarked portrait at a different location.
This conventional paper has a
REFERENCES:
patent: 4504357 (1985-03-01), Holbein et al.
patent: 5161829 (1992-11-01), Detrick et al.
patent: 5388862 (1995-02-01), Edwards
patent: 5405500 (1995-04-01), Knight
patent: 5516153 (1996-05-01), Kaule
patent: 5567276 (1996-10-01), Boehm et al.
patent: 5573639 (1996-11-01), Schmitz et al.
patent: 5660919 (1997-08-01), Vallee et al.
Fujimoto Youichi
Iwasaki Tadahiro
Murakami Toru
Coan James F.
Kim Gene L.
Tokushu Paper Mfg. Co., Ltd.
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