Patent ID: 8128776

Claim:
A method for making a flexible lid for a container from flexible layers of sheet material, the method comprising the steps of: forming a first line of weakness in a first layer, the first line of weakness extending in a closed loop about a center point on the first layer, the first line of weakness weakening the first layer such that severing of the first layer preferentially occurs along the first line of weakness; forming a second line of weakness in a second layer, the second line of weakness extending in a closed loop about a center point on the second layer and being configured such that when the first and second layers are superimposed on each other with the respective center points aligned, the second line of weakness is substantially concentric with and spaced radially inward from the first line of weakness such that an annular region of each layer is defined between the first and second lines of weakness; applying an adhesive at least to areas of one of the first and second layers outside the annular region; superimposing the first and second layers upon each other with the respective center points aligned such that the layers are laminated together to form a laminate; and cutting the laminate along a cut line extending in a closed loop about the aligned center points and lying radially outward of the first line of weakness, thereby forming a disk-shaped lid and separating the lid from a remainder of the laminate.