Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Patent
1979-10-15
1981-08-18
Simmons, David A.
Adhesive bonding and miscellaneous chemical manufacture
Methods
Surface bonding and/or assembly therefor
156 95, 156428, 156429, B65H 8100
Patent
active
042844550
ABSTRACT:
Method and apparatus for continuously-developing multi-layer tubing from plural ribbons of wrapping material of indefinite length layered in seriatim upon a continuously-formed mandrel serving as a temporary supportive base for the tubing. A driven cylindrical winding mandrel is rotatable about its longitudinal axis and has a plurality of longitudinally-extending serrations on its exterior periphery. A stationary driving helix is operatively associated with the winding mandrel means for feeding a workpiece in ribbon form through the driving helix. Initial pressure means proximate the driving helix allows the continuous curling of the workpiece radially inwardly into adjacent helical convolutions about the winding mandrel. This impresses serrations on the convolutions mating with the winding mandrel serrations in the generation of the helical coil configuration and the definition of a developing formed mandrel as a supportive base. The driving helix is the means for progressing the formed mandrel longitudinally of the winding mandrel. The interengagement of the mating serrations of the winding and formed mandrels imparts a positive rotative force to the developing formed mandrel. Unreeling means downstream of the initial pressure means allows the in seriatim spiral feeding of a plurality of ribbons for forming successive contiguous helical convolutions in the buildup of a tubing on the winding mandrel. Supplemental pressure means presses the contiguous layers radially inwardly relative to the winding mandrel. Heating means fuses the enwrapped layers. Means allows the removing of the formed mandrel from interiorly of the finally-developed fused self-sustaining tubing.
REFERENCES:
patent: 2398876 (1946-04-01), Bailey
patent: 2416416 (1947-02-01), Stoltz
patent: 3173822 (1965-03-01), Rigaut
patent: 3272678 (1966-09-01), Swan
patent: 3690993 (1972-09-01), Hawerkamp
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