PACKING CASE

Abstract

A packing case is provided preferably manufactured from a material on which weakening lines can be formed, such as cardboard or plastic. The packaging case includes a straight side weakening line in a center of each of two opposite folding walls of the case. The side weakening lines are vertically arranged along an entire extension of the opposite folding walls. A straight bottom weakening line is formed in a center of the bottom of the packing case, the straight bottom weakening line joining the side weakening lines together. Symmetrical sets of angled bottom weakening lines are provided, each set being arranged at each end region of the bottom of the packing case adjacent to each opposite folding wall. The weakening lines from each set are arranged parallel to one another with their vertex at the central bottom weakening line and the legs of each set ending at the base of a respective one of the opposite folding walls.

Description

Further characteristics and advantages of the invention will become apparent from the detailed description which follows, provided purely by way of non-limitative example, with reference to the accompanying drawings, in which:

FIGS. 1A and 1B respectively show a perspective view and a top plan view of the same case, with the cover removed;

FIG. 2 shows a perspective view of the same case in a partially folded condition;

FIG. 3 shows a side view of the same case in folded condition; and

FIG. 4 shows a plan view of the starting blank of the same case, that is, the same case in unassembled condition.

Referring to FIGS. 1A and 1B, a cardboard packing case 1 is shown in assembled condition, with a typical irregular rectangular bottom 10, which has been provided with two notches 12a, 12b serving as handles located at the upper part of respective opposite folding walls 14a, 14b.

A straight side weakening line 16a, 16b is arranged in the center of each of said opposite folding walls 14a, 14h of said case 1, said side weakening lines 16a, 16b being vertically arranged along the entire extension of said opposite folding walls 14a, 14b. Said side weakening lines 16a, 16b enable said opposite folding walls 14a, 14b to be folded inwards.

A straight bottom weakening line 20 is also arranged in the center of the bottom of the case, so as to join said side weakening lines 16a, 16b together. Said central bottom weakening line 20 enables said bottom 10 to be folded downwards.

Two symmetrical sets 18a, 18b of angled bottom weakening lines are arranged at respective end regions of said bottom 10 of the case, adjacent to each opposite folding wall 14a, 14b. The weakening lines within each set 18a, 18b are arranged parallel to one another, with their vertex at said central bottom weakening line 20 and their legs ending at the base of a respective one of said opposite folding walls 14a, 14b. The number of angled bottom weakening lines within each set, as well as the distance therebetween, will vary according to the size and material of the case. In said case 1, four angled bottom weakening lines are shown within each set 18a, 18b.

By virtue of said symmetrical sets 18a, 18b of angled bottom weakening lines, said case 1 is flattened in assembled condition by concurrently folding said opposite folding walls 14a, 14b inwards and folding said bottom 10 downwards.

Inversely, said case 1 can be expanded from that flattened condition by simply pulling the opposite walls 22a, 22b different to said opposite folding walls 14a, 14b outwards.

Said operations may be more fully understood by referring to FIGS. 2 and 3.

In particular, FIG. 2 shows said case 1 in a partially flattened condition, with said opposite folding walls 14a, 14b partially folded outwards and said bottom 10 partially folded downwards; and FIG. 3 shows said case 1 in a flattened condition, with said bottom 10 totally folded downwards.

FIG. 4 shows the starting blank 1′ of said case 1, that is, case 1 prior to assembly, in order to further elucidate the structure of the case of the embodiment discussed above and the arrangement of the relevant features.

In FIG. 4, the same reference numerals are used to designate like features, except for a prime symbol indicating unassembled condition.

Said blank 1′ thus comprises a bottom 10′, opposite folding walls 14a′, 14b′, and opposite walls 22a′, 22b′. Said bottom 10′ is provided with two symmetrical sets 18a′, 18b′ of angled bottom weakening lines and with a central bottom weakening line 20′ joining two side weakening lines 16a′, 16b′ together. A plurality of notches 12a′, 12b′ are also provided which, upon assembly, will form said notches 12a, 12b of said case 1.

Naturally, the principle of the invention remaining unchanged, embodiments and manufacturing details may vary widely from those described and illustrated purely by way of non-limitative example, without departing thereby from the scope of the invention, as defined in the appended claims.

In the discussed embodiment the bottom 10 of the case 1 is of irregular rectangular shape, but it will be understood that the bottom of the case may be of regular rectangular shape.

In the discussed embodiment the packing case 1 is made of cardboard, but it will be understood that it is possible to use other materials that are commonly used in packing techniques, such as plastic for example.

In the discussed embodiment said case 1 is to be manually assembled right before use by repeatedly folding said blank 1′. However, a factory made case, that is, a case industrially assembled into a permanent configuration and delivered to the user either in flattened or expanded condition, may be used.

Finally, in the discussed embodiment notches 12a, 12b have been provided in the opposite folding walls 14a, 14b. However, said notches 12a, 12b may be additionally or alternatively provided in the opposite walls 22a, 22b different to said opposite folding walls 14a, 14b, or they may not be provided at all.

Claims

1. A packing case manufactured from a material on which weakening lines can be formed, such as cardboard or plastic, and comprising a rectangular bottom and walls that are orthogonal to said bottom, said packing case including: a straight side weakening line in the center of each of two opposite folding walls of said case, said side weakening lines being vertically arranged along an entire extension of said opposite folding walls,a straight bottom weakening line in a center of said bottom, said central bottom weakening line joining said side weakening lines together, andtwo symmetrical sets of angled bottom weakening lines, each set being arranged at each end region of said bottom adjacent to each opposite folding wall, the weakening lines within each set being arranged parallel to one another with their vertex at said central bottom weakening line and their legs ending at the base of a respective one of said opposite folding walls.

2. A packing case according to claim 1, wherein said bottom has an irregular rectangular shape.

3. A packing case according to claim 1, wherein said bottom has a regular rectangular shape.

4. A packing case according to claim 1, wherein each set of angled bottom weakening lines has four angled bottom weakening lines.

5. A packing case according to claim 1, which is made of cardboard.

6. A packing case according to claim 1, which is made of plastic.

7. A packing case according to claim 1, which is a manually assembled case.

8. A packing case according to claim 1, which is a factory made case.

9. A packing case according to claim 1, which is flattened by concurrently folding said opposite folding walls inwards and folding said bottom downwards, and then optionally expanded by pulling the opposite walls different to said opposite folding walls outwards.