B - Operations – Transporting – 31 – B
Patent
B - Operations, Transporting
31
B
93/48, 93/56
B31B 1/26 (2006.01) B31B 1/52 (2006.01) B65B 19/22 (2006.01)
Patent
CA 1051247
ABSTRACT OF THE DISCLOSURE The invention provides a device for folding sheet material, particularly preshaped or punched pieces of cardboard or the like for feeding to an intermittent machine for packaging cigarettes into hinged lid packets, said device being of the type comprising a support and slide surface for said preshaped pieces, stepwise feed means for feeding the preshaped pieces at each step into determined positions in a determined direction along said surface, and folding means arranged to cooperate in succession with each said preshaped piece to fold a peripheral portion thereof extending outwards from a predetermined folding line parallel to said feed direction; and further comprising a folding bar disposed at one of said determined positions and constituted by a fixed plate coplanar to said surface and extend- ing therefrom in a direction parallel to said feed direction, and abutment means arranged to cooperate with an end of said preshaped pieces lying opposite said peripheral portion to bring said folding line into a position coinciding with a free external edge of said bar; said folding means being disposed facing said free edge of said bar and comprising a rod substantially parallel to said bar and perpendicular to said feed direction, first means operable in parallel with said stepwise feed means to move said rod in a direction substantially perpendicular to said feed direction between a rest position above said bar and a working position below it, second means operable in parallel to said stepwise feed means to move said rod in a substantially axial direction between a rest position external to said bar and a working position in which an end portion of said rod becomes positioned below said bar, and mobile fixing means for fixing each preshaped piece in said determined position against said bar during the folding of the relative end portion.
277617
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