Tape applying apparatus

Abstract

Abstract Relatively wide closure strip, preferably of metallic foil, is moved continuously in tension over the surface of a convex platen. The strip has a longitudinally aligned series of finger clearance apertures, and carriers on its outer face a coating of thermoplastic adhesive of substantially lower melting point than that of the bag material to which the closure is to be applied. A narrow tearing tape is continuously fed over the platen in contact with the coated face of the strip and closely adjacent the common center line of the apertures, so that the tape spans the holes longitudinally. The inner zone of the platen immediately underlying the tape is maintained at a heating temperature sufficient to melt the plastic adhesive, thereby heat sealing the tape to the closure strip. An air jet cools the sealed joint, completing conversion of the strip and tape to a permanently composite web. The strip is hinge creased or serrated along the center line of the apertures to facilitate accurate subsequent folding, and the composite web is delivered either to storage reels or directly to packaging apparatus, as desired.

Inventors

• 👤 A Stanley

Bibliographic Details