Printable sheet and method

Claim 1

A HEAT SEALED PACKAGE COMPRISING AN ARTICLE AND A PRINTED PROTECTIVE WRAPPER FOLDED UPON ITSELF AND SURROUNDING SAID ARTICLE AND ENCLOSING THE SAME, SAID WRAPPER COMPRISING A THERMOPLASTIC SHEET HAVING MARGINS THEREOF OVERLAPPED AND DEFINING A SEAM EXTENDING ALONG SAID ARTICLE, ONE SURFACE OF SAID SHEET BEING IN CONTACT WITH AND HEAT SEALED TO THE OTHER SURFACE OF SAID SHEET THROUGHOUT SUBSTANTIALLY THE FULL LENGTH OF SAID SEAM, SAID SHEET NORMALLY BEING GENERALLY NON-RECEPTIVE TO PRINTING INKS AND BEING TREATED ACROSS THE FULL WIDTH OF SAID ONE SURFACE T MAKE HE SAME RECEPTIVE TO SUCH INKS, PREDETERMINED AREAS OF SAID ONE INK RECEPTIVE SURFACE BEING COATED WITH SUBSTANTIALLY SOLID PATTERN INKED INDICIA, ONLY SAID PREDETERMINED AREAS OF SAID ONE SURFACE BEING OVERCOATED WITH A HEAT SEALABLE MATERIAL WHEREBY SAID MATERIAL CONTACTS THE OTHER SURFACE OF SAID SHEET IN SAID SEAM, SAID OTHER SURFACE BEING SELECTIVELY TREATED IN SAID SEAM IN ALIGNMENT WITH SAID PREDETERMINED AREAS OF SAID ONE SURFACE TO ENHANCE THE HEAT SEALABLE CHARACTERISTICS THEREOF RELATIVE TO SAID HEAT SEALABLE MATERIAL, WHEREBY SAID SHEET SURFACES ARE HEAT SEALABLE TO EACH OTHER FOR THE LENGTH OF SAID OVERLAPPED SEAM.