Envelopes – wrappers – and paperboard boxes – Paperboard box – A sidewall includes a horizontally or downwardly extending...
Reexamination Certificate
2000-03-20
2001-05-15
Elkins, Gary E. (Department: 3727)
Envelopes, wrappers, and paperboard boxes
Paperboard box
A sidewall includes a horizontally or downwardly extending...
C229S180000, C229S186000
Reexamination Certificate
active
06230967
ABSTRACT:
FIELD OF THE INVENTION
The present invention generally relates to a paper container, and in particular to a paper container made by folding a single sheet of paper having folding lines for facilitating the folding operation and enhancing the structural strength thereof.
BACKGROUND OF THE INVENTION
Advertisement printed on paper is commonly seen. One may frequently receive a lot of advertisement mail. Such advertisement mails are usually disposed randomly. Some people may make paper containers out of the advertisement paper.
FIG. 5
shows an example of a paper container A made of advertisement paper. The paper container A is made by folding a single sheet of paper several times in a predetermined sequence and thereafter fixed by staples or glue. Such a paper container has several disadvantages:
(1) It is difficult to make the container for a person having not practiced for a long time and thus skill is required in mating such containers efficiently.
(2) After the folding operation, staples B must be used to fix and maintain the container A. The stapler B may cause problem is recycling the paper container A.
(3) It takes times to make the paper containers.
(4) No folding lines are formed in the paper container A for reinforcing the structure thereof whereby the container A may easily collapse.
It is thus desirable to provide a paper container that overcomes the above problems.
SUMMARY OF THE INVENTION
Accordingly, an object of the present invention is to provide a paper container which may be made by folding a single sheet of paper, such as advertisement paper.
Another object of the present invention is to provide a paper container made of a sheet of paper on which folding lines are formed for facilitating the folding operation whereby the container may be made readily and efficiently.
A further object of the present invention is to provide a paper container made of a sheet of paper on which folding lines are formed for reinforcing the structure thereof whereby no staple or glue is needed in fixing and maintaining the container.
Yet a further object of the present invention is to provide a paper container made of a sheet of paper on which advertisement may be printed in advance so that when the container is formed, the advertisement is shown on the sides thereof.
To achieve the above objects, in accordance with the present invention, there is provided a paper container made of a paper blank on which folding lines are formed for dividing the paper blank into a central section and four side sections. The side sections intersect each other with two first triangular sections formed therebetween. A second triangular section is connected to each intersection and a third triangular section is connected to and symmetrical with respect to each second triangular section. A fourth triangular section is connected to each third triangular section. In forming the paper container, two opposite side sections and the first triangular sections are folded up first and the remaining side sections are folded up thereafter. The first triangular sections are then folded inward to overlap the corresponding side sections. The second sections and corresponding third triangular sections overlap each other and are folded down to overlap the first triangular sections. The fourth triangular sections are folded and inserted between the first triangular sections and the side sections to form and maintain the paper container. No staple or glue is needed in fixing and maintaining the paper container. The folding lines reinforce the structure of the paper container.
REFERENCES:
patent: 2373730 (1945-04-01), Williamson et al.
patent: 2754046 (1956-07-01), Roberts
patent: 3531041 (1970-09-01), Rohde
patent: 3606078 (1971-09-01), Phillips, Jr.
patent: 3913823 (1975-10-01), Lin
patent: 3964668 (1976-06-01), Lin
patent: 4148429 (1979-04-01), Burr et al.
patent: 4291826 (1981-09-01), Swanson
patent: 4648549 (1987-03-01), Trutna
patent: 4846398 (1989-07-01), Johnson
Elkins Gary E.
Pro-Techtor Inter-national Services
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