Abstract: This invention relates to a process consisting in the automated preparation of cartridges containing a substance to infuse, like coffee, tea or types of herbal tea and the cartridge itself. The plastic cartridges are formed in a ring shape, in which the interior area can contain radial members, thus giving rigidity and uniformity to the cartridge. The infusion substance is put inside the cartridge and an infusion paper or filter is glued to the cartridge surfaces and seals the cartridge. The infusion paper is made from a fiber composition which is resistant to high infusion temperatures and is unrolled as a continuous band on top and underneath the cartridges. After sealing the infusion paper to the cartridges, that same paper is cut along the cartridges perimeter in a clean and direct way, without leaving any exceeding part or leftovers. These cartridges are destined for new vending or infusion machines.