Patent ID: 8011278

Claim:
A method for forming a slotted profiled cellular polyvinylchloride siding board comprising: conveying a cured, profiled cellular polyvinylchloride siding board between an upper wheel and a lower wheel, wherein: the upper wheel comprises a series of punches disposed on an outer periphery of a frame of the upper wheel, wherein each punch comprises a shearing portion that extends from the frame, and which is configured in the shape of a slot; and the lower wheel comprises a series of mating dies formed on an outer periphery of a frame, wherein each mating die of the series of mating dies comprises a cavity which is recessed into the frame of the lower wheel; wherein conveying the profiled cellular polyvinylchloride siding board between the upper wheel and the lower wheel comprises: disposing the cured, profiled cellular polyvinylchloride siding board between a first nip roll drive unit and a second nip roll drive unit, wherein the upper wheel and the lower wheel are disposed between the first nip roll drive unit and the second nip roll drive unit, wherein: each of the first and second nip roll drive units comprises an articulated upper pressure wheel opposed to a lower drive wheel; interconnecting a hub of the lower drive wheel of the first nip roll drive unit, a hub of the lower drive wheel of the second nip roll drive unit, and the hub of the lower wheel with a second timing belt; and interconnecting a hub of an intermediate wheel with the second timing belt, wherein the intermediate wheel is located between the lower wheel and the lower drive wheel of the second nip roll drive unit; and punching a slot into the cured, profiled cellular polyvinylchloride siding board to substantially shear all exposed sides of the slot comprising: rotating the upper wheel and the lower wheel relative to each other, comprising: attaching a first timing belt to a hub of the lower wheel and to a hub of a motorized wheel, wherein the motorized wheel is in communication with a gear motor; and activating the gear motor; and rolling the shearing portion of a particular punch into the cavity of a particular mating die such that the shearing portion penetrates through the cured, profiled cellular polyvinylchloride siding board.