Adhesive bonding and miscellaneous chemical manufacture – Surface bonding means and/or assembly means therefor – With bending – folding – winding – or wrapping means
Patent
1974-09-13
1976-05-25
Lanham, C. W.
Adhesive bonding and miscellaneous chemical manufacture
Surface bonding means and/or assembly means therefor
With bending, folding, winding, or wrapping means
72133, 72166, 93 77CL, 113 1B, 113 1G, 113113R, 156443, 156499, B21D 510, B29D 2310
Patent
active
039590666
ABSTRACT:
Three-ply web material is rolled approximately 360.degree. into the form of a cylinder within a preform cavity. A feed roller at the opening rotates continuously and a spring loaded pressure plate has an edge at the opening which forces the web material against the feed roller. After the trailing edge of the segment of web material has passed the edge of the pressure plate, contact between feed roller and web material is lost and the circumferential position of the seam of the preform is thus precisely located. There is a slight overlap between the ends of the material at the same. The preform is longitudinally transferred into a non-conducting cylindrical forming cavity where heat and pressure are applied to fuse the overlap and form the seam. Heat is applied by induction heating through the walls of the forming cavity to the aluminum ply at only the overlap area. Pressure is applied by an expandable balloon mandrel inside the preform.
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patent: 2089169 (1937-08-01), Anderson
patent: 2130727 (1938-09-01), Aument
patent: 2230410 (1941-02-01), Parkhurst
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patent: 3723219 (1973-03-01), Prince et al.
patent: 3730393 (1973-05-01), Ledewitz et al.
patent: 3764425 (1973-10-01), Neff et al.
Miller William P.
Twigg Robert W.
Combs E. M.
Lanham C. W.
Polytube, Inc.
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