Can one packaging machine produce both three-side and four-side sealed bags?

• No, three-side and four-side sealing use different heat-seal jaw layouts and film paths; one standard machine cannot switch.
• Three-side sealing uses two longitudinal jaws plus one cross jaw; four-side sealing requires four independent heat-seal jaws, and dies are not interchangeable.
• For both bag styles, buy a convertible-die model or a dual-lane bag-making machine.
• Require the supplier to provide FAT sample bags for both styles with heat-seal temperature, pressure, and dwell time parameters.
• Confirm changeover time and die MOQ, and verify CE/FDA compliance documents.