Heat-seal type wrapping apparatus

摘要

A heat-seal type wrapping apparatus which operates by wrapping successive pieces of candy at regular intervals in a plastic film being unwound from a reel and being formed into a cylinder, subjecting the cylinder of plastic film to longitudinal heat seal along its overlapping margins and then to transverse heat seal between adjacent wrapped pieces of candy, and centrally severing the transversely heat-sealed regions. The apparatus comprises a device for preheating the overlapping margins of the film to a suitable temperature prior to the longitudinal heat seal and a device for preheating transverse heat-seal regions to a suitable temperature prior to the transverse heat seal, thereby ensuring satisfactory heat seal both longitudinal and transverse. The preheating device for transverse heat seal comprises a plurality of units arranged on a rotatable disc so that their radial positions can be adjusted, while the rotation of the transversely heat-sealing device is made adjustable to enable the spacing of transverse heat seal to be adjusted.