Method of carton flap relaxing

Manufacturing container or tube from paper; or other manufacturi – Bending – Folding

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Details

493438, 493418, 493397, B31B 148

Patent

active

045511268

ABSTRACT:
Corrugated carton is moved between sprayers which apply water to the score lines of each major end flap and on opposite sides of the score bar about 1" up on the flap and 1" down on the panel. The major flaps are then bent into closed position and while bent, heat is applied to raise the temperature of the wet areas until the same are dry. Then, the bending means and heat are removed. Each end flap assumes a substantially closed position.

REFERENCES:
patent: 3198092 (1965-08-01), Koran
patent: 3826178 (1974-07-01), Taylor
patent: 3854917 (1974-12-01), McKinney et al.
patent: 4200033 (1980-04-01), Labombarde
"Water Jet Folder", A. H. Caudill and W. F. Risedorf, Sep. 1974, 1098-1099.

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