Method of press-forming corrugated paperboard into curved board

Details Method of press-forming corrugated paperboard into curved board Method of press-forming corrugated paperboard into curved board

1978-09-12

1980-12-30

Simmons, David A.

Adhesive bonding and miscellaneous chemical manufacture

Surface bonding means and/or assembly means therefor

With separate heating means for work

156224, 156558, 156563, B32B 3100

Patent

active

042421721

ABSTRACT:
In a method of press-forming a planer board of corrugated paperboard into a curved board which serves as the substrate of, for example, an automobile roof trim board by utilizing a thermoplastic adhesive in the production of the corrugated paperboard and applying heat to the planer board through dies in a hot-press, the liners of the corrugated paperboard are prevented from wrinkling by preheating the planer board so as to soften the thermoplastic adhesive therein immediately before placement between the dies. An apparatus to perform this method comprises a board carrier which has heaters and can carry the planer board into the hot-press with continued heating of the board.

REFERENCES:
patent: 3367823 (1968-02-01), Clausen et al.
patent: 3539416 (1970-11-01), Sanders et al.
patent: 3904466 (1975-09-01), Jones et al.
patent: 4032387 (1977-06-01), Sugiyama et al.
patent: 4093482 (1978-06-01), Ogata et al.
patent: 4124421 (1978-11-01), Fujii

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