Patent ID: 7419559

Claim:
A method of forming a plurality of seals for covering container openings, the method comprising the steps of: providing a seal layer having an upper surface; joining a lower surface of a heat sealable sub-layer with an upper surface of a heat resistant sub-layer; folding the joined heat sealable and heat resistant sub-layers to form at least one elongate section, the section generally having an I-shaped cross section with an upper horizontal portion, a lower horizontal portion, and a vertical hinge portion between the upper horizontal portion and the lower horizontal portion, the heat resistant sub-layer covering a top surface and a bottom surface of each of the upper and lower horizontal portions to form a pull-tab forming layer; securing the pull-tab forming layer to the seal layer by joining the heat resistant sub-layer at the bottom surface of the lower horizontal portion to the upper surface of the seal layer; and punching a plurality of seals having a shape from the secured layers.