초록 ▼

Laminated shingles are manufactured from roll stock roofing material that is wider than that used to make similar laminated shingles. The roll stock includes longitudinal edge strips having a reduced thickness. The roll stock is cut into strips of tabbed top sheets and backing sheets. The strips of

Laminated shingles are manufactured from roll stock roofing material that is wider than that used to make similar laminated shingles. The roll stock includes longitudinal edge strips having a reduced thickness. The roll stock is cut into strips of tabbed top sheets and backing sheets. The strips of material used for the backing sheets are at once wider than commonly used in the industry, and include the longitudinal edge strips of reduced-thickness material. Because the backing sheet is wider two rain seal strips are laid down on the backing sheet prior to being laminated to the tabbed top sheet. The backing sheets are laminated to the tabbed top sheets with the longitudinal edges aligned. The wider backing sheet provides a substantially wider nail zone. In addition, since it allows for a second rain seal strip, provides somewhat more protection against leakage. The portion of the backing sheet that comprises the added width is relatively thinner than the remaining portions of the sheet. Paired shingles may therefore be oriented adjacent one another in opposite directions and stacked and bundled. The total thickness of the stack will be the same throughout the stack, so the stack of shingles is flat.

대표청구항 ▼

[ We claim:] [1.] A laminated roofing shingle, comprising:a top sheet having first and second longitudinal marginal edges and alternating tabs and cutout portions along the first longitudinal marginal edge,a backing sheet having first and second longitudinal marginal edges and adhered to the top she

[ We claim:] [1.] A laminated roofing shingle, comprising:a top sheet having first and second longitudinal marginal edges and alternating tabs and cutout portions along the first longitudinal marginal edge,a backing sheet having first and second longitudinal marginal edges and adhered to the top sheet with the first longitudinal marginal edge of the backing sheet in alignment with the first longitudinal marginal edge of the top sheet, the width of the backing sheet greater than 1/2 the width of the top sheet but less than the width of the top sheet, and the backing sheet having a first longitudinal section with a first thickness and a second longitudinal section with a second thickness, wherein the second thickness is less than the first thickness, and wherein the second longitudinal section extends along the second longitudinal marginal edge of the backing sheet.