US 4,637,544 AGranted

Process for the manufacture of boxes, the boxes which result therefrom and the elements for their composition

OwnerAlessandro Quercettiinventor

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Abstract

A process for the manufacture of boxes, wherein a sheet material, such as cardboard, is punched to produce a box element with at least five sections limited by parallel score lines; the ends of at least three sections are inserted and fastened in U-grooves recessed in side walls formed by synthetic material, a fourth section forms a lowerable and liftable cover and a fifth terminal section forms a closing flap, for which each side wall of synthetic material has an insertion groove. The fastening of the punched element to the side walls may be carried out without adhesives by means of the engagement of the punched element edges, and of cuts thereof, in the U-grooves of the side walls, and with some teeth of them. Some side flaps defined in the closing flap can co-operate with inwardly and outwardly directed teeth of the insertion grooves, by providing for the cover in closed position a releasable catch and, respectively, a sealed closing.

Claims24

Dependent claims

A process for the manufacture of boxes, including the operations of:

predisposing a punched element composed of a flexible sheet material having impressed thereon at least four score lines parallel to each other, perpendicular to two opposite sides of said punched element and subdividing said punched element in at least five sections;
predisposing two side walls formed by synthetic material, each said side wall having, recessed in a face, a first U-groove having branches of lengths corresponding, in the same order, to the distances of four successives of said scores lines from the preceding score line or from the initial edge of the punched element respectively, and additionally having a second substantially rectilinear groove, parallel to and closely disposed on the outer side of one of the branches of said first U-groove;
bending said punched element sections along said score lines, thus giving the punched element the general shape of the box to be produced, open and still lacking the side walls;
and inserting and fastening the ends of at least three of said bent punched element sections in the corresponding branches of said U-grooves of the two side walls;
whereby two sections of the punched element remain free with respect to the side walls, one of them forming a lowerable and liftable cover and the other, being a terminal one, forming a closing flap to be inserted in said second groove of the side walls.

2 more elements

Dependencies are inferred from the claim text.