초록 ▼

A portable system provides a high-strength joint between two portions of radiant energy transmitting thermoplastic strap having an opaque radiant energy absorbing area on one surface thereof wherein the strap portions are overlapped so that the opaque area is at the interface therebetween. The overl

A portable system provides a high-strength joint between two portions of radiant energy transmitting thermoplastic strap having an opaque radiant energy absorbing area on one surface thereof wherein the strap portions are overlapped so that the opaque area is at the interface therebetween. The overlapped strap portions are urged together by being tensioned over an arcuate guide surface. Infrared energy is directed through a free uncontacted outer surface area of one of the strap portions and onto the opaque area for melting the adjacent strap surfaces to form a joint.

대표청구항 ▼

Apparatus for forming a high-strength seal joint between two overlapped portions of plastic strap each formed of radiant energy transmitting material, wherein at least one of the overlapped strap portions has a thermoplastic region including an area of radiant energy absorbing material disposed in f

Apparatus for forming a high-strength seal joint between two overlapped portions of plastic strap each formed of radiant energy transmitting material, wherein at least one of the overlapped strap portions has a thermoplastic region including an area of radiant energy absorbing material disposed in facing relationship with the other overlapped strap portion, said apparatus comprising: a source of radiant energy, urging means for placing the overlapped strap portions under tension along a curved path so that the overlapped strap portions are means for placing the overlapped strap portions under tension along a curved path so that the overlapped strap portions are urged into engagement with each other while they are being placed under tension, and means spaced from said overlapped strap portions for directing the radiant energy through a sealing region of one of the urged-together portions of the strap and onto the radiant energy absorbing area for heating the area and melting the adjacent thermoplastic region, said means for directing not contacting the urged together strap portions at the sealing region, whereby the overlapped strap portions are fused together without clamping for forming a joint therebetween upon cooling and resolidification of the melted thermoplastic region.