Envelope tear-strip applying-machine

Claim 1

A MACHINE, FOR THE AUTOMATIC APPLICATION OF HEATED STRIPS OF THERMOSEAL MATERIAL ADJACENTLY ALONG THE FALP CREASES OF A CONVEYED SUCCESSION OF OPEN-FLAP ENVELOPES, COMPRISING, (A) SUPPORTING FRAME, (B) A CONVEYOR MOUNTED ON THE FRAME TO RECEIVE AT ONE END A CONTROLLED SUCCESSION OF ENVELOPES WITH THEIR SEALING FLAPS RETRACTED, (C) A MAGAZINE ADJACENT THE OPPOSITE END OF THE CONVEYOR FOR STACKING THE STRIPPED ENVELOPES, (D) A HEATED STRIP-APPLICATOR JUXTAPOSED TO THE CONVEYOR TO SOFTEN THE STRIP AND TO ADHERE THE STRIPS ALONG THE FLAP-CREASES OF THE ENVELOPES, A SAID APPLICATOR COMPRISING A DISC WHEEL POSITIONED TO APPLY THE STRIP MATERIAL ADJACENTLY ALONG THE FLAP CREASE AND MOUNTS A THERMOSTATIC-CONTROLLED HEATING ELEMENT, (E) MEANS FOR THE CONTROLLED FEEDING OF THE THERMOSEAL STRIP MATERIAL TO THE HEATED APPLICATOR, (F) A SERIES OF SPACED ROLLERS ASSOCIATED WITH SAID CONVEYOR TO SPACE THE ENVELOPES DURING MOVEMENT ALONG THE CONVEYOR. (G) A PERFORATOR DISK TO APPLY A SERIES OF SPACED PERFORATIONS ALONG THE ENVELOPE FLAP IMMEDIATELY ADJACENT THE AREA WHERE THE STRIPS ARE APPLIED, (H) AIR COOLING MEANS FOR COOLING SAID STRIP AFTER APPLICATION TO THE ENVELOP FLAP, AND (I) MEANS FOR SEVERING SAID STRIP BETWEEN THE ENVELOPES SUBSEQUENT TO THE APPLICATION BY THE APPLICATOR.