| 摘要 |
<p>A folder for folding a sheet or a set of collated sheets having a pair of folding cylinders (1, 2; 51, 52) with a folding nip (3; 53) for pressing a fold (4) in a curved portion (5; 55) of the sheet or set of sheets (6; 56) passing through the folding nip (3; 53), a sheet support structure (7; 57) extending along a first side of the folding cylinders (1, 2; 51, 52) and the folding nip (3; 53) and two circulatable pressing members (9,13; 59,63) which are, when in an operating condition for folding, in contact with the circumference of a first folding cylinder (1, 51) and a second folding cylinder (2, 52) respectively, for urging the sheet or the set of sheets (6; 56) towards the folding nip (3; 53). The sheet support structure (7; 57) constitutes a clamping area (16;66) for clamping a set of sheets at least in a position spaced from the folding cylinders, thus allowing a sheets of different sizes to be folded as a single set.</p> |
