Method of and apparatus for preforming metal overlap edge with overlap die
AssigneeWestern Electric Company, Inc.
InventorKenneth Paul Trusch
Life of this patent
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Abstract
The invention relates to the formation of a metallic shield about a cable core to provide a substantially circular configuration of the shield around the core with an overlapped edge portion of the shield being preformed. The shield is first partially formed about the cable core and thereafter the shield is formed in the substantially circular configuration around the cable core while a portion of the overlying longitudinal edge portion of the shield at the overlap is turned inwardly toward the cable core sufficiently to preclude the edge portion of the shield from protruding disadvantageously into a jacket which is subsequently extruded over the shielded cable core.
Claims8
A method of forming a metallic shield about a cable core to provide a preformed overlap of the shield, which includes the steps of,
- forming the shield partially about the cable core,
- passing the partially formed shield and cable core through an overlap and forming die to form the shield about the cable core and to provide the shield with a substantially circular configuration with the longitudinal edge portions of the shield forming an overlap, while at the same time,
- guiding the longitudinal edge portions of the shield to cause at least a portion of the overlying longitudinal edge portion of the shield at the overlap to be turned inwardly toward the cable core a distance sufficiently to preclude the edge portion of the shield from protruding into a subsequently extruded jacket over the formed shield.
Apparatus for forming a metallic shield about a cable core to provide a preformed edge of the shield, which includes,
- means for forming the shield partially about the cable core,
- means for forming the shield around the cable core with a substantially circular configuration with the longitudinal edge portions of the shield forming an overlap, and
- means for guiding longitudinal edge portions of the shield while said last means is forming the circular configuration with overlap, to cause at least a portion of the overlying longitudinal edge portion of the shield at the overlap to be turned inwardly toward the cable core a distance sufficiently to preclude the edge portion of the shield from protruding into a subsequently extruded jacket over the shield.
Dependencies are inferred from the claim text.