Method of performing a task in registration with a seal in materials and flexible containers made by method

A method for performing a task in registration with a seal in at least one thermoplastic material having a discrete seal therein, said method comprising the steps of:

• a. providing at least one thermoplastic material;
• b. providing a sealing mechanism;
• c. forming:
• i. at least two discrete seals in said at least one thermoplastic material with said sealing mechanism;
• and
• ii. at least two eye marks in said at least one thermoplastic material, wherein said eye marks have edges that are sufficiently well-defined so that they can be located with a detection device, wherein said eye marks are registered with at least one of the discrete seals;
• wherein at least one eye mark is ring-shaped formed by concentric circles;
• wherein at least one of the discrete seals is formed simultaneously with said at least one of the at least two eye marks,
• d. locating said eye marks with said detection device;
• e. providing a unit operation mechanism, wherein said unit operation mechanism is a cutting mechanism that produces a remaining portion of at least one of the discrete seals having a rounded edge with a radius of about 10 mm or less;
• f. transmitting information relating to the location of the eye marks at least indirectly to said unit operation mechanism;
• and
• g. performing an operation on said at least one thermoplastic material relative to said seals at a location on said at least one thermoplastic material that is determined based upon the location of the eye marks, with said unit operation mechanism, wherein said eye marks are spaced apart from each other such that transmission of information relating to the location of an eye mark allows the unit operation mechanism to perform an operation on the thermoplastic material at a location that is within 1 mm or less to at least one of the discrete seals.