| 摘要 |
<p>This invention relates to a rectangular roofing shingle defined as a shingle unit (1) having front (9) and rear (10) stepped edges and having an undivided headlap portion (2) and a butt portion (3) horizontally divided into at least 4 dissimilarly shaped, space-separated, snaggle-toothed tabs (4-7) which are integral with, and extend from the bottom portion of said headlap and which are recessed from the side edges of said headlap; said shingle unit, having an overall length in inches approximately equal to from about 9 to about 12 inches multiplied by the number of tabs, is secured to a reinforcement strip (22) which is positioned to underlay said tabs, and from about 0.75 to about 5 inches of said adjoining headlap and which has a length equal to the overall length of the shingle unit.</p> |
