Patent ID: 6635137
Filing Date: 2003-10-21
Classification: B65D,Y10T

Abstract:
A method of forming a plurality of seals for covering container openings, the method comprising the steps of:providing a backing layer having an upper and a lower surface; providing a seal layer having an upper and a lower surface; joining a lower sub-surface of a first sub-layer of a heat sealable material with an upper sub-surface of a second sub-layer of a heat resistant material; folding the joined first and second sub-layers to form at least one elongate section, such section generally having an I-shaped cross section with an upper horizontal portion, a lower horizontal portion, and a vertical hinge portion, wherein the upper horizontal portion defines a heat sealable top surface of a pull-tab forming layer, and wherein the lower horizontal portion defines a heat resistant bottom surface of the pull-tab forming layer; securing the backing layer to the pull-tab forming layer by joining the heat sealable top surface of the pull-tab forming layer to the bottom surface of the backing layer; adhering the seal layer to the pull-tab forming layer by joining the heat resistant lower surface of the pull-tab forming layer to the upper surface of the seal layer; and punching a plurality of seal shapes from the adhered layers.