Importance

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Abstract

A folding machine includes an accumulator that accumulates at least one sheet of flexible substrate material. A knife folder is adjacent the accumulator and has a knife fold plate that receives the sheet and a knife blade that reciprocates against the sheet. Buckle fold drive rollers are adjacent the knife folder and receive the sheet driven from the knife blade to form a knife fold. At least one buckle folder is oriented along the buckle fold drive rollers and receives a knife fold to form a buckle fold in the sheet. A buckle folder receives the knife fold to form a buckle fold. A sheet engages an end stop in the buckle folder. A biasing mechanism engages the end stop to allow biasing movement of the end stop to assist movement of the sheet in and out of the buckle folder.

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First Claim