Envelopes – wrappers – and paperboard boxes – Paperboard box – Separate reinforcing element
Patent
1997-04-18
1998-07-14
Elkins, Gary E.
Envelopes, wrappers, and paperboard boxes
Paperboard box
Separate reinforcing element
229918, B65D 550
Patent
active
057791368
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a cardboard container for the transport and storage of products that is designed to provide a consistent and reinforced structure.
2. Description of the Prior Art
Cardboard boxes are known from several embodiments which contemplate their construction starting from a stamped sheet mainly comprising the rectangular base, the side walls or larger sides and the front walls or shorter sides, with longitudinal or lateral extensions of these sides being provided in certain cases in order to define boxes with different shapes.
Boxes are frequently used which have double front walls made up of the front wall itself and its longitudinal extension which also extends upwards and which, once conveniently folded inwards, defines said double wall and guarantees the reinforcement of this sector, said longitudinal extension generally being provided with side laps that attach to the side face, thereby facilitating the cardboard assembly.
In the present case, certain embodiments are contemplated wherein said longitudinal laps may be divided into several sectors which, once conveniently folded, constitute corner reinforcements which allow for improved piling up conditions for the boxes. The folding of these longitudinal extension corner sectors and their attachment to the rest of the box normally involves a certain complexity.
On the other hand, for specific box dimensions, certain problems arise during the manufacturing process as a result of the limitations imposed by the cardboard box plasticizing stage.
Obtaining a carboard box which solves the above problems by incorporating reinforcement side walls which have previously been formed independently from the cardboard sheet, of a size and shape adapted to the container itself, makes the invention proposed hereunder feasible.
SUMMARY OF THE INVENTION
The cardboard container object of this invention is designed to provide a consistent and reinforced structure.
It is the main object of this invention the inclusion of a reinforcement front wall that is independent from the initial box configurating sheet, said reinforcement front wall having prismatic extensions correspondingly located in the box corners to enhance the piling up strength.
It is another object of this invention that the box should be fitted with ventilation holes for the products contained, and internal folds in the edges of the side walls which facilitate its handling.
It is also another object of the invention that the cardboard should be provided with independent reinforcement supports, located in the inner hollow space of the prismatic extensions, designed to improve piling up conditions under special circumstances.
The cardboard container which is the object of the invention is composed of a stamped sheet provided with several folding lines which define the side or larger walls and the front or shorter walls, and corresponding independent reinforcement front walls adhered to the front walls after assembly in a manner that they become perfectly integrated to the overall container, said reinforcement front walls being provided with prismatic portions which enhance the piling up strength of the box.
The container front wall extends laterally to form respective side laps which fold and adhere onto the inner face of the side walls, each lap being provided with an oblique cut in its vertex which defines an edge that coincides with the slanting edge of the oblique cut in the side wall when assembled.
The reinforcement front wall is made up of a central sheet with three folding lines along each of its sides which define two sectors, i.e. an inner and an outer sector, the upper edges of which are slightly raised in respect to the edge of the central sheet and from whose outer sector subsequently extend corresponding lateral lap which reveal a slight staggering along their upper edge, which lap extend on a lower level up to the oblique zone corresponding to the vertex.
Both these sectors, that is, the inner and outer sector, fo
REFERENCES:
patent: 3397831 (1968-08-01), Adams
patent: 4905834 (1990-03-01), Gimeno et al.
patent: 5163611 (1992-11-01), Singer
Elkins Gary E.
Pearson Loren D.
Schwartz Robert M.
Schwartz, P.A. Robert M.
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