Patent ID: 8801351

Claim:
In a book case making machine ( 1 ) comprising a source of spine center strip material, a center strip conveying device ( 30 ), a cutter ( 32 ) for separating a spine strip ( 3 ) from spine strip source material, and means for introducing the spine strip ( 3 ) of width (Bs) into a guide channel ( 26 ) of a board feed ( 20 ) that advances the spine strip ( 3 ) between spaced apart cover boards ( 2 ) in a feeding direction ( 23 ) synchronously with ( 2 , 3 ) the delivery and joining of a blank to the two boards and center strip, which blank ( 4 ) is provided with glue on a glue application roller ( 14 ) and supplied by a blank cylinder ( 12 ) in a roll-down device ( 12 , 15 ), wherein the improvement comprises that the center strip conveying device ( 30 ) advances ( 31 ) the spine strip material ( 5 , 6 ) to the cutter ( 32 ) by the spine width (B S ) transverse to the board feed direction ( 23 ) in a cyclic fashion.