Patent ID: 6146484
Filing Date: 2000-11-14
Classification: B29D,B31D,B32B,B41M,Y10T

Abstract:
A method for constructing a honeycomb structure generally undetectable by radar, the method comprising:a) placing a first roll of radar absorbing first sheet material and a second roll of radar absorbing second sheet material opposite each other on opposing sides of a rotatable central roller such that the first and second sheet material can be fed to the roller and wound thereon;b) spatially arranging a first printer with the first roll to print a plurality of parallel adhesive linear deposits on the first sheet material as said first sheet material passes across said first printer;c) spatially arranging a second printer with the second roll to print a plurality of parallel adhesive linear deposits on the second sheet material as said second sheet material passes across said second printer, with the proviso that the parallel adhesive deposits printed on the second sheet material not be in line with the parallel adhesive deposits printed on the first sheet material when sheet material from each roll is fed to the central roller and wound thereon;d) substantially simultaneously passing the first and second sheet materials across respective first and second printers to thereby print adhesive on each first and second sheet;e) substantially simultaneously feeding said first and second sheets to the central roller for overlapping winding thereon over a plurality of revolutions of said central roller to thereby form a non-expanded honeycomb structure;f) positioning heated tacking rollers against said overlapping sheet materials for applying adhesive-curing heat and pressure to said sheet materials behind a plurality of points of adhesive deposit to thereby tack said overlapping sheet materials to each other prior to completion of a first revolution of said central roller;g) positioning heated grooved node line rollers against said overlapping sheet materials for applying adhesive-curing heat and pressure on said overlapping sheet materials and for creating node lines in the sheet materials prior to completion of a first revolution of said central roller to thereby determine honeycomb cell shape and configuration during expansion of the non-expanded honeycomb structure; andh) removing the non-expanded honeycomb structure from the central roller and thereafter expanding said structure.