Envelopes – wrappers – and paperboard boxes – Envelope
Patent
1987-03-05
1989-03-07
Little, Willis
Envelopes, wrappers, and paperboard boxes
Envelope
229 75, 229110, 206632, B65D 2700
Patent
active
048099040
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to an envelope and an envelope element which are capable of protecting an article contained therein against an impact imparted thereto from the outside and an envelope which can readily extend its internal shape in conformity with the shape of an article and, more particularly, to an envelope and an envelope element which are formed by using a laminated cardboard.
Formerly, for a package bag for a heavy article, an envelope formed by using a two-layer laminated cardboard consisting of a flat cardboard and a corrugated cardboard adhered thereto, has been developed. In this prior art, a flat article such as a book and a magazine can be safely carried without any damage. However, when a brittle article made of glass or ceramics such as a bottle or an ashtray or a rigid article such as a tool is contained in such an envelope and carried, there are problems due to rigidity, insufficient buffer capability to guard against an impact, and so forth. Accordingly, it is difficult to contain such an article in the envelope readily and to carry it without any damage.
SUMMARY OF THE INVENTION
An object of the present invention is to provide an envelope and an envelope element which are capable of both readily containing an article regardless of its nature and form, and carrying and storing the article without any damage.
In accordance with an envelope and an envelope element according to the present invention, since an internal space thereof in conformity with a shape of an article to be contained is readily obtained and the contained article is held so it does not move while pressing the article, the article can be contained, carried and stored under quite stable conditions, and, since the envelope and the envelope element possess sufficient buffer capability to guard against an impact imparted thereto from the outside, the article contained therein can be effectively protected.
In one embodiment of the present invention, an envelope element consists of a cardboard including a relief portion having relief means.
In a preferred embodiment of the present invention, the relief means comprises a plurality of creasing lines, a cutout and a weak portion.
In another embodiment of the present invention, an envelope blank and an envelope formed from the envelope blank comprise a front section and a back section integrally connected thereto at its one end edge via a creasing line, and include a relief portion having relief means in a portion near the creasing line.
In a preferred embodiment of the present invention, the envelope blank consists of a laminated cardboard of at least three layers consisting of a pair of cardboards and a corrugated cardboard inserted therebetween.
In another preferred embodiment of the present invention, the front or the back section is formed with an end flap for sealing the envelope.
In still another preferred embodiment of the present invention, the front or the back section is formed with a side flap for sealing the side portion of the envelope.
In a preferred embodiment of the relief portion, the relief means comprises a creasing line having a line cut or a score line and a cutout.
Although the envelope blank consists of a cardboard in the preferred embodiments of the present invention, the envelope blank may consists of a nonwoven fabric or a synthetic resin material.
Although a part of the creasing lines are score lines in some embodiments of the present invention, the creasing lines may be simply pressed to form fold lines without making the score lines.
BRIEF DESCRIPTION OF THE DRAWINGS
The drawings illustrate embodiments of the present invention:
FIG. 1 is an elevational view, seen from inside, of an envelope blank according to the present invention;
FIG. 2 is a perspective view, partly cutaway, of an envelope obtained by folding the envelope blank of FIG. 1;
FIG. 3 is a top plan view of the envelope of FIG. 2;
FIG. 4 is an elevational view of another envelope blank according to the present invention;
FIG. 5 and FIG. 6 show st
REFERENCES:
patent: 3726469 (1973-04-01), Koehler
patent: 3873017 (1975-03-01), Blatt
patent: 3884352 (1975-05-01), Pilz, III et al.
patent: 4065047 (1977-12-01), Swan
patent: 4164588 (1979-08-01), Johnson
patent: 4418861 (1983-12-01), McFarland et al.
patent: 4470540 (1984-09-01), Koltz
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