Patent ID: 6250911
Filing Date: 2001-06-26
Classification: B29C,H05B,Y10S

Abstract:
An electrical heater for a mold, the heater comprising:an elongated tubular casing of polygonal cross section, extending along an axis, annularly corrugated, made of a ductile metal, and deformable by hand, the casing being unitarily formed bya succession of generally rectangular and inwardly open U-section rings each having a pair of parallel legs extending transversely of the axis and a bight portion extending flatly parallel to the axis, anda succession of annular webs interconnecting the rings and each joining a leg of one respective ring with a leg of an adjacent respective ring, each leg and each bight portion having a respective transverse width, the transverse widths of the legs and of the bights all being generally the same, the casing having a transverse width and that is about five times as great as the width of the legs, each web having a longitudinal width equal to at most one-fifth the width of the legs;a manually deformable electrical heating element extending longitudinally inside the casing; anda manually deformable mass of electrically insulating potting filling the casing around the element.