Reinforcing insert for collapsible packages
OwnerArthur P. Corellainventor
Life of this patent
Estimating the term…
Abstract
A cardboard insert for reinforcing collapsible packages, such as see-through plastic bags, is formed from a onepiece blank in which a number of panels are separated by score lines. The panels are sized and shaped to define the desired form, generally a right paralleliped, and the mating edges of the insert blank are pre-slit - and alternate tabs bent inward to form interlocking fingers. The interleaved projecting tabs define a locked seam which is, additionally, reinforced by the adjoining inward-bent tabs. The seam is formed by bending the several panels along the score lines to form the finished shape of the insert, and interleaving the projecting tabs of the free edges.
Claims12
A reinforcing insert for flexible packaging, formed from a single blank, comprising:
- a plurality of facets, each corresponding to a panel in said blank;
- a plurality of fold lines, each corresponding to a score line in said blank for defining said panels;
- and
- a plurality of alternating projecting tabs and intervening spaces in each of matable edges of at least two of said facets, said tabs being substantially straight and substantially rectangular and said spaces being substantially rectangular, said tabs and spaces being so conformed that the tabs in one of said matable edges substantially dimensionally correspond to the spaces in the other of said matable edges, said projecting tabs in the matable edges being interleaved to form a seam, with each of the projecting tabs forming said seam being substantially unbent and substantially in the same plane as its adjoining facet and the outer ends of the projecting, unbent tabs demarcating said seam.
A method for producing reinforcing inserts for flexible packaging from a sheet of cardboard or the like, comprising the steps of:
- developing on the surface of said sheet the outline for a plurality of facets defining said insert;
- cutting the developed outline from the sheet, and scoring fold lines thereon for defining said facets;
- slitting each of matable edges of at least two outboard facets of the insert, to define laterally projecting substantially straight and substantially rectangular tabs;
- bending alternate ones of said projecting tabs out of the plane of its facet such that the bent and unbent tabs in the mating edge of one facet are out of phase with respect to the bent and unbent tabs in the mating edge of the other facet;
- and
- folding said sheet along said score lines and interleaving said projecting tabs at said matable edges to form a conjoint edge, with each of the unbent projecting tabs being substantially in the same plane as its adjoining facet and the outer edge of the projecting, unbent tabs demarcating the conjoint edge.
Dependencies are inferred from the claim text.