Cardboard blank folding machine

Details Cardboard blank folding machine Cardboard blank folding machine

1975-02-25

1976-03-23

Simpson, Othell M.

93 59PL, 93 84R, B31B 126

Patent

active

039453057

ABSTRACT:
In a cardboard blank folding machine for folding up the extreme transverse panels of a blank, e.g. for a carton, along longitudinal fold lines, and comprising a pair of longitudinal beams whose spacing is adjustable in dependence on the spacing of said fold lines, a pair of lateral elements whose spacing relative to said longitudinal beams is adjustable in dependence on the transverse dimensions of said extreme transverse panels, and a pair of folding bars each forming a longitudinally extending ramp for forcing said extreme transverse panels to fold about said fold lines as said blank passes along said machine, the improvement wherein said folding bars are each supported at the upstream end on a support fixed to said corresponding lateral element and at the downstream end on a support which is vertically movable in a guide supported by said corresponding beam, and vertical displacement of each said downstream support is directly and proportionally tied to transverse displacement of said corresponding lateral element relative to said corresponding beam.

REFERENCES:
patent: 1986857 (1935-01-01), Roberts et al.
patent: 2291063 (1942-07-01), Staude et al.
patent: 2547963 (1951-04-01), Neal
patent: 2871772 (1959-02-01), Nelson
patent: 3618479 (1971-11-01), Shields

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