B - Operations – Transporting – 31 – B
Patent
B - Operations, Transporting
31
B
B31B 1/14 (2006.01) B26D 5/02 (2006.01) B26F 1/44 (2006.01) B31B 1/20 (2006.01)
Patent
CA 2248840
An improvement is provided in 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.
Borden Ladner Gervais Llp
Sandford Peter
LandOfFree
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