Sheet saving diverter for corrugator

A dual diverter system for sheets cut from a corrugated paperboard web traveling along a normal web path through a rotary shear to permit scrap sheets to be shear cut and scrapped from an unuseable web portion and useable sheets of a selected length to be shear cut and saved from a useable web portion removed from the traveling web to form a gap, which gap is defined by a downstream web tail end and an upstream web lead end, said system comprising:

• scrap diverter means adjacent and downstream from the shear for diverting scrap sheets cut by the shear, said scrap diverter means including a scrap diverting apparatus movable between a passive web passage position and an active scrap diverting position;
• sheet diverter means positioned downstream of the scrap diverter means for diverting useable sheets cut by the shear, said sheet diverter means including a diverting section positioned to capture the leading cut edge of a useable sheet before the trailing edge is shear cut from the web lead end, a shingling section for slowing the useable sheet, and a useable cut sheet stacking device;
• and,
• means for controlling the shear to selectively cut scrap length sheets by operating the shear at synchronous speed and selected length useable sheets by operating the shear at a variable speed.