Electrical heater for use in a mold of an injection-molding machine
AssigneeHotset Heizpatronen u. Zubehohr GmbH
InventorEugen Schwarzkopf
Life of this patent
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Abstract
An electrical heater for a mold has an elongated tubular casing made of a ductile metal and deformable by hand, a manually deformable electrical heating element extending longitudinally inside the casing, and a manually deformable mass of electrically insulating potting filling the casing around the element. The casing can be annularly corrugated and formed by a succession of like U-section rings each having a pair of parallel legs and a bight portion and a succession of like rounded annular webs interconnecting the rings and each joining a leg of one respective ring with a leg of an adjacent respective ring.
Claims7
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 by
- a 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, and
- a 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;
- and
- a manually deformable mass of electrically insulating potting filling the casing around the element.
Dependencies are inferred from the claim text.