Patent ID: 8033975
Filing Date: 2011-10-11
Classification: B31B

Abstract:
1. A folding unit for corrugated cardboard sheets in inline production of corrugated cardboard boxes, the corrugated cardboard sheet having two outermost panels, comprising: an inlet and an outlet; a pair of parallel and laterally displaceable folding beams each with an endless conveying belt, the folding beams extend from the inlet of the folding unit to the outlet of the folding unit; a pair of folding rules which are arranged under the respective folding beams and the pair of folding rules extend from the inlet of the folding unit and towards, but not all the way to the outlet of the folding unit; a pair of folding rods fixedly positioned outside the respective folding rules and at angle to the respective folding rules, said folding rods being arranged in the folding unit front portion, in the conveying direction of the corrugated cardboard sheets; a pair of folding belts which are arranged under and cooperate with a respective of the pair of folding rule and extend from an associated guide roller with a vertical shaft at the terminal end of the folding rod in the conveying direction to an associated guide roller with a horizontal shaft substantially adjacent to the outlet; means for supplying and folding the two outermost panels of the corrugated cardboard sheet from 0° -90° at the inlet of the folding unit and 90° -180° at the outlet of the folding unit; a pair of wheel stands which are each engaged with the respective folding belts in a position in the conveying direction of the corrugated cardboard sheets after the terminal end of the folding rules and substantially adjacent to the respective folding beams, wherein each of the pair of wheel stand comprises an attachment which is fixedly attached to the associated folding beam and at least one guide plate is fixedly attached perpendicular to the folding beam, at least one wheel rotatably supported by a support, said support is turnably suspended from a pair of vertically arcuate slots in said guide plate by means of a pair of separate guide pins; means for adjusting an angle of said wheel to the associated conveying belt; and means for fine adjustment of the angular settings of the wheel stand.