Patent ID: 9199822
Filing Date: 2015-12-01
Classification: B65H

Abstract:
1. A method for folding a stack of substrate sheets comprising: positioning a stack of non-continuous substrate sheets for folding from an aperture in a curved form; feeding the stack of substrate sheets into a first set of rollers by driving an approximate midpoint section of the stack toward a contact point of the first set of rollers; rolling the first set of rollers to receive the approximate midpoint section of the stack of substrate sheets from the feeding at a first side of the first set of rollers and passing the stack of substrate sheets to a second set of rollers in a first direction to fold the stack of substrate sheets at the approximate midpoint section to form a closed end of the folded stack of substrate sheets and an open end of the folded stack of substrate sheets; receiving the folded approximate midpoint section of the stack of substrate sheets from rolling the first set of rollers at a first side of the second set of rollers with the second set of rollers; reversing from the first direction and rolling the first and second sets of rollers to cause the stack of substrate sheets to travel in a second direction such that the open end of the stack of substrate sheets is received at a second side of the first set of rollers; stopping the first set of rollers to hold the open end of the stack of substrate sheets with the first set of rollers after receiving the stack of substrate sheets at the second side of the first set of rollers; reversing from the second direction and rolling the first and second sets of rollers to cause the stack of substrate sheets to travel again in the first direction; and after reversing from the second direction, again receiving the folded approximate midpoint section at a contact point of the second set of rollers and passing the stack of substrate sheets to a second side of the second set of rollers.