Binding machine a cassette machine and booklet binding method

A booklet binding machine where each booklet includes a cover that has a front side, a rear side, a spine disposed between said front and rear sides and a number of sheets enclosed in the cover and glued to the spine thereof, the machine comprising:

• a cassette receiving element that receives a cassette pack comprising a cassette and a bundle of booklet covers disposed in the cassette, each booklet cover being provided with fold lines and an activatable adhesive between the fold lines;
• an infeed mechanism that feeds booklet covers from the cassette to the machine, one at a time;
• a combining unit that combines a plurality of sheets with an infeed booklet cover;
• and
• an activating unit that activates the adhesive so that ends of the sheets penetrate the adhesive and thereby are fastened to the booklet cover;
• the cassette receiving element receiving a cassette pack in which the booklet covers are disposed in a bundle of non-folded state in the cassette;
• the machine also including a folding device for folding the booklet covers along two of said fold lines,
• the folding means folding a booklet cover prior to the sheets being combined with the booklet cover, such that the combination of the sheets with the booklet cover implies that the sheets are inserted into said folded booklet cover.