Patent ID: 6641514
Filing Date: 2003-11-04
Classification: B65H

Abstract:
A buckle folding unit to be supplied with sheets running-in one after another, comprising:an adjustable folding pocket having a pocket stop and an outlet; rollers having parallel center lines and being adapted for conveying a respective sheet into said folding pocket until a leading edge of said sheet abuts said pocket stop and for folding and pulling said sheet out of said outlet; a sheet detecting device for generating a first signal at an instant while a respective sheet is running-in and a second signal at an instant while said sheet is being pulled out of said outlet; a determining device for determining an actual value of a furnished sheet length of a respective sheet within a time segment lasting from said first signal to said second signal; and an adjusting device for adjusting said fold pocket in dependence on a difference between said actual value and a predetermined nominal value of furnished sheet length.