Process for manufacturing a multi-layer shingle

1. An apparatus for manufacturing multi-layer shingles, the apparatus comprising:

an entry pull roll configured to provide a substantially continuous sheet comprising shingle material;

an adhesive applicator configured to receive the sheet from the entry pull roll and to apply a laminating adhesive to a surface of the sheet;

a cutting station configured to cut the sheet, carrying the laminating adhesive into at least a first piece, a second piece, and a third piece, each having a longitudinal center; and

a combining section configured to (a) align the longitudinal centers of the first piece, the second piece, and the third piece in a single plane without twisting and (b) combine the first piece, the second piece, and the third piece without twisting.

2. The apparatus of claim 1 , wherein the adhesive applicator is further configured to apply a first adhesive strip proximal to a longitudinal axis of the sheet and a second adhesive strip distal to the longitudinal axis of the sheet, wherein the longitudinal pieces comprises a first piece carrying the first adhesive strip, a second piece carrying the second adhesive strip, and a third piece, and wherein, in a transverse direction, the first piece is wider than the second piece, which in turn is wider than the third piece.

3. The apparatus of claim 2 , further comprising a combining section configured to:

position the second piece beneath the first piece;

adhere the second piece to a bottom surface of the first piece using the first adhesive strip;

position the third piece beneath the second piece; and

adhere the third piece to a bottom surface of the second piece using the second adhesive strip,

wherein adhering the first, second, and third pieces forms a laminated shingle blank that is at least three layers thick along its longitudinal axis.

4. The apparatus of claim 3 , further comprising a shingle cutter configured to:

cut out interdigitated tabs about the longitudinal center of the laminated shingle blank, the interdigitated tabs having substantially identical dimensions across the three layers of the laminated shingle blank; and

cut, along the transverse direction, the laminated shingle blank into individual multi-layer shingles.

5. The apparatus of claim 1 , wherein the adhesive applicator is a dual adhesive applicator, and wherein the cutting station comprises at least one dual slitter configured to cut the sheet following substantially straight lines along a longitudinal axis of the sheet.

6. The apparatus of claim 1 , further comprising a slotted guide tray comprising at least one slot separated by at least one longitudinal gap.

7. The apparatus of claim 1 , further comprising a steering bridge configured to transfer the first piece, the second piece, or the third piece from the cutting station to the combining section.

8. The apparatus of claim 1 , wherein the combining section comprises a combining press roll and at least one guide roll.