US Patent 7624503 Method for manufacturing wire harness branching portion

Manufacturing is carried out while including the steps of: from a trunk line 12, drawing out electric wires 13a to be a branch line 14 longer than a required length of the branch line 14; forming a branch line portion 17 by applying tape winding to the drawn-out electric wires 13a; making, as a trunk line accompanying part 17a, a part from a base end P2 to a branching position P1 of the branch line portion 17 accompany the trunk line 12 and making, as a main branch line part 17b, a part from the branching position P1 to a front end P3 of the branch line portion 17 distant from the branch line 12; and applying an protecting treatment 19 by tape winding to the whole.