Machine for making stress laminated panel

Abstract

Abstract A corrugated laminated panel in which a multiplicity of flat webs of paper are glued together and while the glue is still soft, the laminated web is fluted or corrugated longitudinally in a converging process which convolutes the individual plies of the laminated panel, incrementally stretching the fibers on the outside of the bends and conversely compressing the fibers on the inside of the bends. The fluting machine includes a drag shoe engaging a transversely curved surface to impart drag against the laminated sheet to assure that the sheet will stay smooth and eliminate slack. The fluting machine also includes adjustable pressure points which may be adjusted to assure uniformity of the flutes formed in the web. The fluting machine also includes spring loaded fingers to remove variations in flute development to further assure uniformity of the flutes. A drying tunnel is provided with guide rods providing a downward force to hold the laminated sheet in contact with supporting belts in the drying tunnel, and is heated by an air system including air impingement on the panel at relatively high velocity which dries the adhesive in the panel and at the same time serves to retain the panel or sheet on the supporting belt assembly therefor.

Inventors

• 👤 Lucien E Tisdale

Bibliographic Details