Hot melt application to continuous webs

Claim 1

THE COMBINATION OF A PACKAGING MACHINE OPERATIVE TO WRAP ARTICLES IN SECTIONS OF WRAPPING MATERIAL CUT SUCCESSIVELY FROM A CONTINUOUS WEB THEREOF WHICH IS FED INTO SAID MACHINE; APPARATUS FOR APPLYING SPACED APART PATTERNS OF HOT MELT TO THE WEB AS THE LATTER IS FED TO SAID MACHINE AND COMPRISING A ROTATABLE GRAVURE CYLINDER HAVING A GRAVURE DEPRESSION COVERING ONLY A PORTION OF THE CIRCUMFERENCE OF THE CYLINDER AND CORRESPONDING TO THE PATTERN OF HOT MELT TO BE APPLIED TO THE WEB, A RESERVOIR CONTAINING HOT MELT IN WHICH SAID CYLINDER IS PARTLY IMMERSED, MEANS ENGAGING THE SURFACE OF SAID CYLINDER FOR REMOVING HOT MELT FROM THE LATTER SAVE AT SAID GRAVURE DEPRESSION, MEANS HEATING AT LEAST SAID RESERVOIR SO AS TO MAINTAIN THE HOT MELT IN LIQUID STATE PRIOR TO APPLICATION TO THE WEB, AND GUIDE MEANS ENGAGING THE WEB IN ADVANCE OF SAID PACKAGING MACHINE AND LEADING THE LATTER INTO CONTACT WITH SAID GRAVURE CYLINDER SO AS TO RECEIVE HOT MELT FROM SAID GRAVURE DEPRESSION OF THE LATTER; AND MEANS DRIVING SAID GRAVURE CYLINDER FROM SAID PACKAGING MACHINE SO AS TO EFFECT A SINGLE COMPLETE REVOLUTION OF SAID GRAVURE CYLINDER DURING THE FEEDING OF EACH SECTION OF THE WEB INTO THE PACKAGING MACHINE; SAI GRAVURE CYLINDER HAVING A CIRCUMFERENCE SLIGHTLY SMALLER THAN THE DIMENSION OF EACH SECTION OF THE WEB IN THE LONGITUDINAL DIRECTION OF THE LATTER, THEREBY TO AVOID CUMULATIVE ERRORS IN THE REGISTRATION OF THE APPLIED PATTERNS OF HOT MELT WITH THE SUCCESSIVE SECTIONS.