Electrically conductive flexible tube

摘要

This invention relates to an improved spirally wound flexible tube of the type having an inner electrically conductive plastic strip of channel shaped cross-section including a relatively wide flat web and flexible flanges bordering the margins of said flat web, the inner strip being helically wound to form a tube with the flanges directed radially outward and arranged in contiguous pairs with each succeeding convolution; and an outer nonconductive plastic cap section of channel shaped cross section helically wound over the inner plastic strip, the cap including a relatively narrow web having flexible flanges directed radially inward and overlying the contiguous pairs of radially outwardly directed flanges and bonded through the distal side. The improvement resides in an electrically conductive adhesive extending in a helical path and disposed between said inner plastic strip and said outer plastic cap section for a continuous communication with at least the tip portion of said contiguous pairs of flexible flanges directed radially outward from said inner plastic strip.