Driving mechanism for adjustable upand-down activation of the sealing jaws of a packaging machine

Claim 1

IN A PACKAGING MACHINE IN WHICH A TUBE OF HEATSEALABLE MATERIAL IS FILLED WITH SUCCESSIVE CHARGES OF MERCHANDISE AND PROVIDED WITH LONGITUDINALLY SPACED-APART TRANSVERSE HEAT SEALS BETWEEN SAID CHARGES IN ORDER TO FORM INDIVIDUAL MERCHANDISE-FILLED PACKAGES, SAID HEAT SEALS BEING CREATED BY A PAIR OF SPACED-APART HEATED JAWS ARRANGED ON EITHER SIDE OF SAID TUBE, SAID JAW BEING MOVABLE TOWARD EACH OTHER CLAMP SAID TUBE BETWEEN THEM AND THEREBY FORM A SEAL IN SAID TUBE, THEN DOWNWARDLY TO ADVANCE SAID TUBE, THEN AWAY FROM EACH OTHER TO RELEASE SAID TUBE, AND THEN UPWARDLY TO THEIR INITIAL POSITION PREPARATORY TO THE FORMATION OF ANOTHER SEAL IN SAID TUBE: AN ADJUSTABLE DRIVE MECHANISM OF EFFECTING THE UPWARD AND DOWNWARD MOVEMENTS OF SAID SEALING JAWS COMPRISING A ROLLER ROTATABLE ABOUT AN AXIS FIXED WITH RESPECT TO THE MACHINE FRAME, A ROLLER ROTATABLE ABOUT AN AXIS ADJUSTABLE IN AN ARCUATE PATH WITH RESPECT TO A FIXED AXIS ON THE MACHINE FRAME, AND A ROLLER ROTATABLE ABOUT AN AXIS RECIPROCABLE IN AN ARCUATE PATH WITH RESPECT TO A FIXED AXIS ON THE MACHINE FRAME, ALL OF SAID AXES BEING PARALLEL, A CABLE FASTENED AT ONE END TO SAID SEALING JAWS AND EXTENDING OVER SAID FIXED ROLLER AND ADJUSTABE ROLLER AND HAVING ITS OTHER END SECURED TO SAID RECIPROCABLE ROLLER, MEANS FOR RECIPROCATING SAID RECIPROCABLE ROLLER THROUGH A SWING OF CONSTANT LENGTH IN ORDER TO IMPART UPWARD AND DOWNWARD MOVEMENT TO SAID SEALING JAWS, AND MEANS FOR ADJUSTING THE POSITION OF SAID ADJUSTABLE ROLLER BETWEEN THE FIXED POINT ABOUT WHICH SAID RECIPROCABLE ROLLER SWINGS AND THE ARCUATE PATH ALONG WHICH SAID RECIPROCABLE ROLLER SWINGS, IN ORDER TO VARY THE UPWARD AND DOWNWARD STROKE OF SAID SEALING JAWS.