Electric resistance heating devices – Heating devices – Continuous flow type fluid heater
Patent
1994-05-27
1995-09-26
Jeffery, John A.
Electric resistance heating devices
Heating devices
Continuous flow type fluid heater
392480, 392472, H04B 340, F24H 110
Patent
active
054540615
ABSTRACT:
A helically wound and helically ribbed plastic tubing incorporating an electrically conductive heating wire and an apparatus and method for making the tubing are disclosed. A plastic ribbon is wound about an axis into a tube with one edge of each lap overlapping and heat-bonded to an edge of the preceding lap as the tubing is rotated; a conductive wire is embedded in the ribbon; and a bead is applied and heat-sealed onto the tubing, encapsulating the conductive wire during rotation of the tubing, providing a unitary structure including a conductive wire integral to a flexible tubing having a corrugated crevice-free outside and a smooth inside. Coolant is applied to the tubing for cooling the unitary ribbon, wire and bead tubing and to assist in advancing the tubing along the axis.
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"The Clear Solution for a Complex Problem," Tigerflex.RTM. 2001 Series, Specification, Undated, Kuriyama of America, Inc., Elk Grove Village, Ill.
Jeffery John A.
Steward Plastics, Inc.
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