Patent ID: 8439621

Claim:
A device for shaping a book cover back on the inside of a horizontally positioned, spread-out book cover aligned approximately evenly distributed with a spine of a book block, said device comprising: two opposite-arranged fold-forming rails having a longitudinal extension; and a shaping tool that is movable towards the inside of the book cover back that faces the spine to lift the book cover back between the fold-forming rails to form a web on the book cover back, wherein the shaping tool comprises: a tool bar having a top presenting a guide plane, and two adjacent support bars that extend parallel to the fold-forming rails along the longitudinal extension, wherein the support bars are adapted to adjust a web width of the book cover back in a direction transverse to the longitudinal extension through a joint adjustment of the spacing between the support bars, and the support bars are form-fittingly and frictionally positioned on the guide plane of the tool bar.