Cardboard carton
AssigneeSociete Anonyme dite: Cartonneries de la Lys "ONDULYS"
InventorGeorges Strebelle
Life of this patent
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Abstract
A semi-stiff cardboard carton produced, stored and transported flat until required for use, when it is set up in a single simple operation. The carton is produced from a blank having a rectangular base, side and end panels, the end panels having flaps glued to adjacent side panels. The major symmetrical axis of the blank is a first fold line and secondary fold lines extend between each apex of the base and the first fold line, the secondary fold lines lying on the interior bisector of the angle formed between edges of adjacent end and side panels. When folded, the end panels are folded in half toward the centre of the carton so that the side panels come together, and the base folds in half along the major axis and projects downwardly from the side panels.
Claims11
A blank for a collapsible carton, comprising a sheet of carton material, said sheet having;
- a plurality of panel members constituting outer parts of the sheet;
- a convex-polygonal base member constituting a central part of the sheet;
- a system of hinge lines, each defining a side of one of the panel members and a side of the base member coincident with the panel side, to enable turning the panel members about the hinge lines for setting up a carton;
- and
- a system of fold lines extending over surfaces of said base member and of several of said panel members, said system including (a) a primary fold line coinciding with a center line of the sheet, (b) a number of secondary fold lines extending into the base member, one between each corner of the base member and a point on the first fold line diagonally spaced from the respective corner, and (c) a similar number of tertiary fold lines diagonally extending across panel members, each connecting as intersection of the first fold line and of one outer edge with an adjacent corner of the base, to enable repeated twisting of the members over which the fold lines extend, relative to the fold lines, with localization of resulting constraints in the fold lines, for collapsing the set-up carton into a flat sheet unit and for unfolding said unit to again set up the carton.
A collapsible carton, comprising;
- a plurality of panel members constituting walls of a carton;
- and
- a convex-polygonal base member extending between substantially coplanar edges of said panel members;
- said panel and base members having a system of hinge lines, each defining one of said edges of the panel members and a side of the base member coincident therewith, to enable turning the panel members about the hinge lines for setting up the carton;
- and
- a system of fold lines extending over surfaces of such members to enable repeated twisting of the respective members relative to the fold lines with localization of resulting constraints in the fold lines, for collapsing the carton into a flat sheet unit and for unfolding said unit to reconstitute the carton, said system of fold lines including (a) a primary fold line coinciding with a center line of the base member, (b) a number of secondary fold lines extending into the base member, one between each corner of the base member and a point on the first fold line diagonally spaced from the respective corner, and (c) a similar number of tertiary fold lines diagonally extending across panel members, each connecting an intersection of the first fold line and of one outer edge with an adjacent corner of the base.
A flat sheet unit which can be converted into a carton and, before such conversion, stored as part of a pack of carton sheet units, comprising;
- a plurality of interconnected, folded panel members having surfaces in contact with one another, said members being unfoldable to provide walls of a carton;
- a convex-polygonal member having folded surface portions in contact with one another and unfoldable to provide a base of said carton;
- said members having
- a system of hinge lines, each defining a side of one of the panel members and a side of the convex-polygonal member coincident therewith, to enable turning the panel members about the hinge lines for setting up the carton;
- and
- a system of fold lines extending over surfaces of such members to enable repeated twisting of the respective members relative to the fold lines with localization of resulting constraints in the fold lines, for unfolding said members to set up the carton and for collapsing the set-up to reconstitute a flat sheet unit, said system of fold lines including (a) a primary fold line a part of which coincides with a center line of the base member, (b) a number of secondary fold lines extending into the base member, one between each corner of the base member and a point on the first fold line diagonally spaced from the respective corner, and (c) a similar number of tertiary fold lines diagonally extending across panel members, each connecting an intersection of the first fold line and of one outer edge with an adjacent corner of the base.
Dependencies are inferred from the claim text.