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Page 3-1 

 

Chapter 3 

Incoming

document

In-feed rollers

Fold rolls

Folding drum

Edge detecting sensors

 

 

In-feed and accordion folding components 
Paper gates (“flippers”), and other items have been removed for clarity.

 

 
The accordion folder comprises a pair of in-feed rolls, and a folding drum that works together with two fold 
rolls. A document entering the folder passes through the bridge and into the in-feed rolls, which push the 
document into contact with the folding drum. Sensors located at the fold rolls detect the leading edge of 
the document and this information is used to control the folding drum in the first phase of the folding 
program. 
 
 

1

 

[1]  Initial phase of the folding program 
The incoming document is pushed forward by the in- 
feed document and is captured by the lower fold roll.