Special receptacle or package – Structural features for vertical stacking – i.e. – similar... – Having vertical projecting element or recess for interlock
Reexamination Certificate
1999-08-06
2001-07-10
Elkins, Gary E. (Department: 3727)
Special receptacle or package
Structural features for vertical stacking, i.e., similar...
Having vertical projecting element or recess for interlock
C206S508000, C206S509000, C229S915000
Reexamination Certificate
active
06257411
ABSTRACT:
The present invention relates to a carton made of corrugated cardboard sheet material or the like, of the type exhibiting a polygonal cross section, comprising lateral faces, an upper face forming a cover and a lower face forming the bottom of the carton.
It relates also to a blank for making such a carton.
It finds a particularly important, although not exclusive, application in the field of cartons which can be stacked on pallets, where there is a tendency for the lower cartons to be crushed should the size of the stack be too big.
The invention is also applicable to polygonal cartons with more than four sides which may exhibit, when they are not filled completely, deformations in the event of lateral loading, as well as inferior resistance to compression.
Carton centering systems using lateral tenons which cooperate with orifices placed on the edges of packages are already known. Such means are fragile and do not withstand repeated manipulations.
Latching systems are also known which make it possible to lock a box cover, thereby subsequently avoiding these untimely deformations. They involve in particular latching with adhesive tapes. Such systems nevertheless have drawbacks. Indeed, they require an additional constituent element of the carton, namely the adhesive tape and thereby entail additional costs and operations during manufacture.
The aim of the present invention is to provide a box and a blank which are better than those previously known at meeting the requirements of the art in particular in that it proposes a centering of the cartons one above another, allowing perfect stacking of the cartons one above another, plumb with one another, this never having been achieved in the past, in an industrial and repetitive manner.
It has thus been possible to observe an improvement of 15% in resistance to compression of the cartons situated at the base of the pallet, for the same quality of cardboard, by virtue of the centering according to the invention.
Owing to the possibilities of perfect stacking which the centering according to the invention permits, the lower cartons are therefore better loaded in compression and more resistant.
With the invention, it is also possible to provide a system for latching the cover allowing good squaring up of the carton during its closure, which is simple and easy to implement, without extra costs and permitting definitive locking, thereby further improving the strength under compression.
For this purpose, the invention proposes in particular a carton of the type described above, characterized in that the cover comprises at least two tabs respectively situated on two opposite sides of the said cover and cut out on one side in a thickness of the upper face or in the lateral face adjacent to the said upper face, and articulated on the other side parallel to and in a manner substantially coincident with the join line between the said upper face and the adjacent lateral face, the said tabs respectively overlapping the outside surface of the said upper face to which they are glued, so that they constitute outgrowths projecting with respect to the said outside surface of the said upper face, and in that the bottom comprises at least two recesses corresponding to the said tabs, made in the said lower face, of complementary shape to the shapes of the tabs and laid out so as to engage with the tabs of a carton arranged underneath.
In advantageous embodiments, recourse is had moreover to one and/or other of the following arrangements:
the lower face and the lateral faces are formed by an open tray, the cover of the carton consisting of a leaf furnished with at least one lateral flap, at least one tab being cut out in the said lateral flap, the said tabs being turned over so as to be glued to the said leaf forming the upper face;
the lower face and the lateral faces are formed from a blank comprising a set of at least four main leaves able to form the lateral faces, connected together by join lines, each main leaf being furnished with a lower flap, the said lower flaps being able to form the bottom of the carton, the cover of the carton consisting of a central leaf furnished with at least one lateral flap, at least one tab being cut out in the said lateral flap, the said tabs being turned over so as to be glued to the said central leaf forming the upper face;
the carton is formed from a blank comprising a set of at least four main leaves able to form the lateral faces, connected together by join lines, each main leaf being furnished with an upper flap and with a lower flap situated respectively on either side of the said main leaf, the said upper flaps being able to form the cover of the carton, the said lower flaps being able to form the bottom of the carton, the tabs being cut out in the lateral faces of the carton and the recesses being made in the lower flaps;
the carton is formed from a blank comprising a set of at least four main leaves able to form two lateral faces, the bottom and the cover of the carton, connected together by join lines, each main leaf being furnished with an upper flap and with a lower flap situated respectively on either side of the said main leaf, the said upper or lower flaps being able to form the other two lateral faces of the carton, and the tabs are cut out in the lower and upper flaps of a first leaf forming the cover, the recesses being made in a second leaf forming the bottom of the carton;
the bottom and the cover each comprise two opposite external flaps and two opposite internal flaps situated underneath the said external flaps, the said flaps being connected respectively to the lateral faces by fold lines and the two tabs are cut out on one side in the internal flaps, and articulated respectively on the other side parallel to the fold lines of the said internal flaps, the said external flaps being glued to the portions of internal flaps adjacent to the tabs and the said tabs respectively overlapping the said external flaps to which they are glued;
the external flaps comprise notches at the corners joining with the fold lines and the internal flaps comprise opposing end projecting parts snap-fitting into the said notches;
the external flaps comprise intermediate notches situated on the fold lines and the internal flaps comprise opposing end projecting parts snap-fitting into the said intermediate notches;
the carton comprises four pairwise opposite tabs glued to the external surface of the upper face forming the cover of the carton, and four opposing recesses in the lower face of the carton;
the tabs are cut out by making a peripheral recess around the said tabs;
each tab exhibits a rectangular or isosceles trapezoidal shape.
the cover comprises two centered slits situated respectively on either side of the cover, parallel to and at a specified distance from the join lines between lateral face and upper face furnished with glued tabs, the ends of the said slits being connected by rupture lines to the end corners joining with the said join lines, able to allow the opening of the carton by tearing off the said cover while pulling toward the outside of the carton from the two slits;
the carton has eight sides, namely four main sides separated by intermediate sides forming cut corners, and it is formed around a mandrel.
The invention also proposes a blank making it possible to obtain a carton such as described above.
It also proposes and in particular a blank or series of blanks made of corrugated cardboard sheet material or the like intended to form a carton with polygonal cross section,
comprising lateral faces, an upper face forming a cover and a lower face forming the bottom of the carton, characterized in that it comprises a first blank or a first portion of blank intended to form the cover of the carton, the said first blank or the said first portion of blank comprising a leaf furnished with at least two lateral flaps, or comprising two so-called upper flaps, the said leaf or the two upper flaps being intended to form the said upper face, in that at least two of the said lateral flaps or the said upper flaps
Bacques Jean-Yves
Mathieu Gerard
Elkins Gary E.
Merchant & Gould P.C.
Otor
LandOfFree
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