Patent ID: 7658993

Claim:
A card intermediate, comprising: (i) a business form layer of paper or film having an upper surface and a lower surface; (ii) optionally, a first thin film layer, adhesively secured to the upper surface of said business form layer; (iii) a second thin film layer having an upper surface and a lower surface, the upper surface being permanently adhesively secured to the lower surface of said business form layer; the lower surface of the second thin film layer having a permanent adhesive and being designated as permanent interface A; (iv) a third thin film layer having an upper surface and a lower surface, the upper surface being adhesively secured, directly, or through an underlying thin coated layer to the lower permanent interface A of said second thin film layer (iii) at a separable interface designated as interface B; and (v) a removable card, having edges and defined in said first thin film layer (ii), said business form layer (i) and said second film layer (iii) by a diecut extending through said layers (i),(ii), and (iii) but not through said third thin film layer (iv), wherein the card is formed by a die cut on a patterned treated area of selective variable adhesion through an adhesive and selective surface-treatment of a part of the area of the upper surface of said third layer (iv) with a corona, flame or plasma treatment or a combination thereof whereby the selective differential surface-treatment increases the adhesion in said part of the areas that are treated, as compared to areas where no surface treatment is applied such that the adhesion at separable interface B is always less than the adhesion at permanent interface A, said patterned treated area having alternating areas of easy and tight separation strength that extend under an area defined by said diecut and which covers from at least about 10 percent to about 90 percent of the surface of either the upper surface of said third layer (iv), the lower surface of layer (iii) or both of said surfaces said patterned treated area allowing for easy separation and removal of said removable card at any area of said form by lifting an edge of said card while maintaining sufficient adhesion to prevent pre-separation of said card.