The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 24, 2001
Filed:
Mar. 17, 1998
Thomas M. King, Joplin, MO (US);
Devender Swaroop, Frederick, MD (US);
Tamko Roofin Products, Joplin, MO (US);
Abstract
A method and apparatus for making laminated roofing shingles includes providing a substantially continuous sheet of shingle material, cutting the sheet material at a first cutting station to define a first pair of longitudinal strips having interdigitating tabs with a first pattern length, further cutting the sheet to define a second pair of longitudinal strips, further cutting the sheet at a second cutting station to define a third pair of strips having interdigitating tabs with a second pattern length, laminating together one of the first pair of strips, one of the second pair of strips and one of the third pair of strips in overlapping relation to form a substantially continuous three-layer laminated strip in which one of the second pair of strips is the lowermost layer and having the tabs of the remaining two strips oriented in a common lateral direction, and cutting the laminated strip into uniform longitudinal lengths whereby laminated roofing shingles are made. The length of the shingles is not an integer multiple of either the first or second pattern lengths.