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US 5,211,963 AGranted
Extrusion apparatus
AssigneeNorthern Telecom Limited
InventorJohn N. Garner
Life of this patent
Estimating the term…
Abstract
Dual extrusion apparatus with a horizontal extruder and a vertical extruder connected to an extruder head and in which the weight of the vertical extruder is carried by a frame. The vertical material extruder is permitted to expand upwardly under temperature variations so as to minimize stress. Also, the extruder head and the vertical extruder are movable together horizontally to comply with temperature induced expansion and contraction.
Claims13
Apparatus for extruding two layers of material onto a core of indefinite length comprising:
- a dual extruder head having a passageway terminating in an extrusion orifice for the layers, a passline for the core extending through the passageway and out through the extrusion orifice;
- a horizontal extruder having an extrusion outlet connectable directly to a first inlet to the passageway of the extruder head;
- an upwardly extending extruder having an extrusion outlet connectable directly to a second inlet to the passageway of the extruder head;
- and a means to carry the weight of the upwardly extending extruder, said means having pivotal axes to allow for movement of the upwardly extending extruder so as to maintain desired alignment between the extruder head and each extruder and maintain the angular orientation of the upwardly extending extruder to minimize stresses caused by temperature variations while:
- a) allowing the head, during temperature variation induced expansion and contraction, to move the upwardly extending extruder horizontally to comply with the expansion and contraction;
- and
- b) allowing temperature variation induced axial extension and contraction of the upwardly extending extruder towards and away from the extruder head.
4 more elements
Dependencies are inferred from the claim text.