Method and apparatus for preventing warp in corrugated cardboard

Details Method and apparatus for preventing warp in corrugated cardboard Method and apparatus for preventing warp in corrugated cardboard

1979-08-08

1982-02-09

Thibodeau, Paul J.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156210, 156250, 156356, 156462, 428186, 428913, B31F 120, B32B 328

Patent

active

043148689

ABSTRACT:
A method and apparatus for minimizing or eliminating warp in corrugated board by imparting different curvature on alternate successive lengths of the board being manufactured prior to its being stacked. The corrugated board, as it moves through the manufacturing apparatus, is subjected to treatment on its upper surfaces at different intervals that the lower surfaces to impart various curvatures to the sections being cut and stacked. As the cut corrugated board sections are accumulated in the stack alternate groups of board sections have opposite curvature throughout the height of the stack. The stacked sections are maintained in this disposition a time sufficient for the weight of the stack to render the formed sheets substantially flat.

REFERENCES:
patent: 2987105 (1961-06-01), Gebbie
patent: 3654032 (1972-04-01), Kruglinski et al.
patent: 3981758 (1976-09-01), Thayer et al.
patent: 4134781 (1979-01-01), Carstens et al.

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