Method of making valved bags from extruded thermoplastic materials
First Claim
1. THE METHOD OF MAKING MERCHANDIZING BAGS OF THERMOPLASTIC MATERIAL WHICH COMPRISES, HEATING THE MATERIAL TO A PLASTIC CONDITION, EXTRUDING THE HEATED MATERIAL THROUGH A DIE ORIFICE TO CONTAINUOUSLY FORM A SEAMLESS TUBE, PROVIDING THE TUBE AS IT EMERGES FROM THE DIE ORIFICE AND WHILE IT IS IN A PLASTIC DEFORMABLE CONDITION WITH A SUCCESSION OF SPACED FILLING VALVE MEMBERS EXTENDING INTEGRALLY THEREFROM AND AT AN ANGLE TO THE AXIS THEREOF, WELDING SUCCESSIVE OPPOSEDS TRANSVERSE PORTION OF THE SEAMLESS TUBE WALLS, ADJECENT TO AND AT ONE SIDE OF SAID FILING VALVE MEMBERS, TOGETHER TO FORM A SUCCESSION OF CONNECTED LENGTHS OF CLOSED SEAMLESS TUBING WITH EACH OF SAID LENGTHS PROVIDED WITH A FILLING TUBE, AND SEVERING THE VALVE MEMBER TRANSVERSELY SUBSTANTIALLY CENTRALLY ALONG SAID TRANSVERSELY WELDED PORTIONS,
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Accused Products
7 Citations
1 Claim
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1. THE METHOD OF MAKING MERCHANDIZING BAGS OF THERMOPLASTIC MATERIAL WHICH COMPRISES, HEATING THE MATERIAL TO A PLASTIC CONDITION, EXTRUDING THE HEATED MATERIAL THROUGH A DIE ORIFICE TO CONTAINUOUSLY FORM A SEAMLESS TUBE, PROVIDING THE TUBE AS IT EMERGES FROM THE DIE ORIFICE AND WHILE IT IS IN A PLASTIC DEFORMABLE CONDITION WITH A SUCCESSION OF SPACED FILLING VALVE MEMBERS EXTENDING INTEGRALLY THEREFROM AND AT AN ANGLE TO THE AXIS THEREOF, WELDING SUCCESSIVE OPPOSEDS TRANSVERSE PORTION OF THE SEAMLESS TUBE WALLS, ADJECENT TO AND AT ONE SIDE OF SAID FILING VALVE MEMBERS, TOGETHER TO FORM A SUCCESSION OF CONNECTED LENGTHS OF CLOSED SEAMLESS TUBING WITH EACH OF SAID LENGTHS PROVIDED WITH A FILLING TUBE, AND SEVERING THE VALVE MEMBER TRANSVERSELY SUBSTANTIALLY CENTRALLY ALONG SAID TRANSVERSELY WELDED PORTIONS,
Specification
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Current AssigneeForrest B. Stannard
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Original AssigneeForrest B. Stannard
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InventorsStannard, Forrest B.
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Application NumberUS03/775,304Time in Patent Office1,377 DaysField of SearchUS Class Current156/196CPC Class CodesB29C 49/04 Extrusion blow-mouldingY10S 383/904 Filling tubeY10T 156/1002 with permanent bending or r...Y10T 156/1052 with cutting, punching, tea...
