Abstract: A two-slotted slider for ribbons comprises a bridge section between the slots, formed by two aligned arms, there being on the arms a fastening area for the ribbon generally provided with tapered reliefs for ultrasonic welding. Preferably the slider is assembled with the ribbon by first pushing both an intermediate loop portion of the ribbon and an end of the latter to pass beyond the elastically flexible arms, and then welding the said ribbon end onto the fastening area of the arms, which is facing the ribbon loop.Welding is carried out between a sonotrode and a contrast device. The apparatus comprises the retractable contrast device and a housing for receiving the sliders one by one and displacing them between a position under a pusher for pushing the ribbon and a position under the sonotrode, as well as a device for straightening the ribbon.

Abstract: An apparatus for the manufacture of shoulder-straps including ribbon, ring and slider comprises a ribbon feeding unit, a slider supplying unit, a sealing unit for sealing the slider to the ribbon, a ribbon translation and turnover unit and an insertion unit for inserting the ribbon into the slider; preferably comprises a ring supplying and deforming unit and a means for ribbon spreading following insertion in the slider. According to the process, the ribbon is slipped into the intentionally deformed ring, sealed to the slider, bent over on itself and inserted into the slider by a punch; a further punch provides for stretching out the ribbon as left in the slider by the first punch.

Abstract: A slider to be applied to ribbons for clothing articles comprising a first portion and a second portion integral with the first portion. The first portion on a surface thereof is provided with projections for ultrasonic welding to a ribbon. The second portion has two slots that slidingly receive a ribbon, these slots being separated by two confronting, resiliently flexible arms. In the assembling process the slider is first secured to the end of a ribbon by welding, generally ultrasonic welding; then a punch moving transversely of the arms pushes a length of the ribbon beyond the arms, simultaneously flexing the arms. When the punch retracts, the arms spring back to their undeformed condition and the ribbon is left astride the arms.