Book production line for producing books composed of book blocks inserted into a casing

A book production line to produce books comprising a book casing and a therein encased book block, the production line comprising:

• a casing-in machine, arranged at a conveying end of the production line, to encase a book block in a book casing;
• a processing section upstream of the casing-in machine, the processing section comprising processing stations arranged at clocking intervals along the processing section to process a book block spine, the processing stations comprising processing devices, the processing section comprising, in sequence of the conveying direction of the book blocks:
• a first processing station group comprising:
• a feed station to supply book blocks to the processing section;
• and
• a second processing station group comprising, in sequence of a conveying direction of the book blocks:
• a transfer station to take over the book blocks;
• an adhesive-application station to apply adhesive to the book block spines;
• a backing station to attach a backing strip;
• and
• a pressing station to press the backing strip against the book block spine;
• and
• a conveyor to successively supply the book blocks in clocked operation to the processing stations with the book block spines exposed and pointing upward toward the processing devices, the conveyor comprising:
• a first conveying section assigned to the first processing station group, the first conveying section comprising a first individual drive;
• and
• a second conveying section assigned to the second processing station group, the second conveying section comprising a second individual drive;
• and
• a control unit operatively connected to the first individual drive and second individual drive, the control unit configured to change the clocking interval length along the processing section based on controlling rotation of the first individual drive and the second individual drive.