Method of manufacturing roofing shingles having multiple ply appearance
US4352837A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 22, 1981 |
| Grant date | Oct 5, 1982 |
| Priority date | — |
| Expiry date | May 22, 2001 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE04D2001/005
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An improved apparatus for manufacturing roofing shingles having multiple ply appearance, in which an elongated strip of a dry organic or mineral material previously saturated in an asphalt tank and with at least one uniform longitudinally continuous strip of a first coating of granules is fed into the apparatus. The apparatus automatically and repeatedly applies spaced apart bands of varying widths of an adhesive material onto the first coating of granules. A second coating of granules is then automatically applied by the improved apparatus to the asphaltic bands. The application of the adhesive bands and the subsequent granule distribution are synchronized so that the granules are distributed only upon the bands of adhesive.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.