AUTOMATIC SHEET WINDING APPARATUS AND METHOD OF WINDING A SKID OF SHEET MATERIAL

摘要

In a preferred embodiment automatically controlled winding apparatus is provided wherein a skid load of paper, cardboard or the like is carried by a hinged skid and is raised by two lift tables to a determined elevation. In the elevated condition a pair of pressure pads is moved downwardly to clamp the load of sheets to the skid. After the load has been brought to a clamped condition the winding of he load is accomplished by bowing the sheets then realigning them. In the apparatus using two lift tables, the winding operation includes the following steps; elevating the skid load by means of the lift tables to an elevated condition; clamping this load to the hinged skid; lowering a first lift table to its lowest condition so that at least one-half of the skid load of sheet material is caused to drop downwardly transcribing an arc while the lesser portion of the skid load remains in a clamped elevated condition; again raising the lowered skid portion to its elevated clamped condition; lowering the second or other one-half of the skid load is caused to drop downwardly transcribing an arc like the other just winded portion of the skid which remains in a clamped elevated condition; again raising this lowered skid portion to its elevated condition and then lowering both lift tables, the supported hinged skid and the load of paper to a lowered condition whereat said skid load of sheet material is removed from the winding apparatus. In an alternate embodiment three lift tables are used with a like-mannered hinged skid. The skid and load are alternately raised by their ends and then at their middle portion to wind the sheets by alternate bowing. In yet another embodiment a skid load of paper is engaged by pivoted end plates. These plates are alternately swung in arcs so that the load is skewed first to one side and then the other to cause the sheets to be displaced on each other.