Method for forming pre-made pouches

A method for forming a cavity in a pouch having three sealed sides, comprising:

• A. providing a pouch comprising two sheets aligned and sealed along three sides such that the pouch has an unsealed side and an opening into an interior cavity;
• B. providing an apparatus comprising
• a frame;
• a bottom clamp plate member slidably mounted to the frame, said bottom plate having a top side and a bottom side, the bottom clamp plate member moveable between a first position and a second position;
• a top die plate member slidably mounted to the frame, said top plate having a top side and a bottom side, the top die plate member moveable between a first position and a second position;
• first and second actuators for moving the bottom clamp plate and the top die plate member toward each other;
• a die extending from the bottom of the top die plate member, said die having a cavity;
• a mounting tower member having a top and a bottom, the bottom of the tower member mounted to the frame;
• a tongue plate member having a first end and a second end, the plate member having a substantially flat planar top and substantially flat planar bottom, the second end fixedly mounted to the top of the tower member and the tongue member extending between the top plate member and the bottom plate member, the tongue member having a fluid passage having a first opening and a second opening through the top side, wherein the second opening is in substantial alignment with the cavity of the die, said first and second openings in communication with the fluid passage;
• C. placing the pouch over the tongue member, such that a section of the tongue is contained within the interior of the pouch;
• D. moving the top and bottom plate members toward each other such that the die contacts the top of the pouch and the bottom plate member contacts the bottom of the pouch against the bottom and top surfaces of the tongue member, respectively;
• E. causing a pressurized fluid to move into the fluid passage of the tongue member and out through the opening, thereby causing a section of the top sheet of the pouch to be forced into the cavity of the die, thereby forming a cavity in the top sheet of the pouch.
• F. moving the top and bottom plate members away from the tongue member;
• and,
• G. removing the pouch having a formed cavity from the tongue member.