Patent ID: 8281539
Filing Date: 2012-10-09
Classification: E04D,Y10T

Abstract:
1. A shingle layer having a front surface and a rear surface and comprising a bitumen-coated web; (a) with the front surface having a tab portion normally exposed when in use on a roof; (b) with the front surface having a butt portion normally unexposed when in use on a roof; (c) with the rear surface having a first zone behind said tab portion and a second zone behind said butt portion; (d) a front first layer of granules of a first size range on at least the tab portion of the front surface adhered to a first adhesive coating of the bitumen-coated web; (e) with the rear surface of the web having a thin second adhesive coating; (f) a layer of fine particles, separate from the first layer of granules, and of a second size range, smaller than said first size range, on the rear surface of the web, embedded in the thin second adhesive; (g) a third adhesive coating of greater thickness than the thin second adhesive coating and with a thickness range of about 0.1 to about 2 mm, disposed against said layer of fine particles, on at least a portion of the first zone of the rear surface; (h) a rear layer of granules, separate from the first layer of fine particles, and that are larger than said fine particles and are of the first size range and of a greater size range than the second size range of said fine particles, embedded in said third adhesive coating and wherein the rear first layer of granules is adhered to said third adhesive coating; (i) the thickness of the shingle layer between the tab portion of the front surface and the first zone of the rear surface being substantially uniform; (j) whereby the rear first layer of granules provides an appearance of thickness to the shingle layer and; (k) wherein the third adhesive coating and the rear first layer of granules of the first size range, embedded in the third adhesive coating comprise a first overlay on the rear surface, and the shingle layer further comprises a second overlay adhered to at least a portion of said first overlay, said second overlay comprising a fourth adhesive coating and a rear second layer of granules of the first size range embedded in said fourth adhesive coating, wherein the shingle layer includes in its tab portion a plurality of tabs, each including a lower edge, with the rear first and second layer of granules being disposed along lower edges of the tabs for a predetermined height, leaving portions of the rear surface of the tabs free of the rear layers of granules wherein there are slots between the tabs, with said slots being of greater length from said lower edge than the height of said rear layer of granules.