(57) An apparatus for the folding of a flap of a plastic film for manufacturing bags (1)
with strip closure, the plastic film being fed in the form of a half-tubular film
(40) made up of two superimposed bands (41, 41') joined along a longitudinal side,
wherein two shaped plate sheets (60, 60') are provided, inserted between the two bands
(41, 41') of the plastic film (40) and arranged in sequence along the path of forward
movement of the film, these plate sheets (60, 60') cooperating with means (51, 53;
51', 53') for forming a first fold of the flap of one band (41) and a second fold
of the flap of the other band (41') of the film (40).
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