trimming
The process of evening the edges of a signature using a board cutter.
board cutter 
Piece of equipment used to make square cuts in paper, cardboard, transparencies, etc.
ruler 
Graduated scale used to measure length.
cutting guide 
Groove in which the gauge moves along the ruler.
gauge 
Movable square parallel to the fixed blade for adjusting the position and dimensions of a signature.
table 
clamp 
Piece lowered onto the signature to keep it in place under pressure.
blade lever 
Arm used to raise and lower the cutting blade.
fixed blade 
Fixed blade attached to the board cutter table.
cutting blade 
Blade that moves vertically to cut signature edges.