초록 ▼

An apparatus for substantially-simultaneously die cutting cardboard sheets for forming folded cardboard cartons and an openable and closable tab. The improvement resides in a die set comprising a plurality of cutting knives projecting from a base, the cutting knives being fixed into a preselected pa

An apparatus for substantially-simultaneously die cutting cardboard sheets for forming folded cardboard cartons and an openable and closable tab. The improvement resides in a die set comprising a plurality of cutting knives projecting from a base, the cutting knives being fixed into a preselected pattern of grooves within the base. The die set may further include at least one transversely-spaced-apart pair of a die blade and a perforating knife mounted in the base, in which either or both of the die blade or the perforating knife is "jackably mounted" for selective manual raising or lowering. The die set may alternatively further include at least one transversely-spaced-apart pair of a die blade and an anvil mounted in the base, in which either or both of the die blade or the anvil is "jackably mounted" for selective manual raising or lowering. In either case, the base is secured to a back-up plate. Either die set is used in a double platen die cutting apparatus in which the die set is mounted on the upper platen and in which the lower platen is movable towards the upper platen. The perforating knife may still further alternatively be mounted on the lower platen. In all cases, the die blade and the perforating knife converge to a common focal or starting point when the platens are urged towards one another with the cardboard therebetween, to provide for a common starting point for the operable and closable tab.

대표청구항 ▼

[What is claimed is:] [1.](I) a first, upper, platen, said first, upper platen having secured thereto a plurality of side-by-side mounted die sets, each said die set including a plurality of cutting knives, which are secured within a main block, said cutting knives being fixed into a preselected pat

[What is claimed is:] [1.](I) a first, upper, platen, said first, upper platen having secured thereto a plurality of side-by-side mounted die sets, each said die set including a plurality of cutting knives, which are secured within a main block, said cutting knives being fixed into a preselected pattern of grooves within said main block, said die set further including: (i) at least one transversely-spaced-apart pair of a die blade and a perforating knife, each said pair of said die blade and said perforating knife being secured within said main block, and in each said pair of said die blade and said perforating knife, said die blade and said perforating knife being slanted vertically towards one another about a vertical axis; (ii) separate securing means securing each said die blade and each said perforating knife of said at least one transversely-spaced-apart pair of a die blade and a perforating knife to said main block; (iii) manually-actuatable means for selectively, separately, individually and directly adjusting said separate securing means for selectively, separately, individually, positively and directly, raising a selected one of each said die blade and said perforating knife of said at least one transversely-spaced-apart pair of a die blade and a perforating knife, and for selectively, separately, individually, and directly lowering a selected one of each said die blade and said perforating knife of said at least one transversely-spaced-apart pair of a die blade and a perforating knife; and (iv) a back-up plate to which said main block is secured; and ) a second, lower, platen, said second, lower, platen being cooperable with said first upper, platen by relative movement therebetween to die cut cardboard sheets which are disposed therebetween;whereby, when said first, upper, platen and said second, lower, platen are urged towards one another with said cardboard therebetween, said die blade and said perforating knife converge at a common focal point or starting point thereby providing a starting point for said openable and closable tab.