Machine for producing laminar products made of paper material, in particular packages of napkins, tissues or similar products and related production method

A machine for producing packages of folded or interfolded laminar products made of paper material, in particular packages of napkins, tissues, towels, or similar products, said machine comprising a support frame configured to support:

• a feeding group configured to feed a first and a second web of paper respectively along a first and a second predetermined feeding direction;
• a cutting group configured to cut said first and second webs of paper, respectively, into a first and a second plurality of sheets of paper of predetermined length;
• a folding or interfolding group equipped with a first and a second counter-rotating folding roll adapted to rotate about respective longitudinal rotation axes and configured to fold or interfold said first and second pluralities of sheets of paper at a folding or interfolding zone, in such a way to obtain a stack of sheets folded or interfolded according to a predetermined folding or interfolding configuration, said cutting group and said folding or interfolding group being mounted on a same support body configured to move between an assembled position in which is adapted to be supported by said support frame, and a disassembled position, in which is not adapted to be supported by said support frame;
• said machine further comprising a displacement group configured to displace said support body between said assembled position and said disassembled position wherein said displacement group and said support body are provided with respective engagement portions configured to engage with each other in such a way to allow said displacement group to displace said support body between said assembled position and said disassembled position with respect to said support frame;
• wherein said displacement group is configured to displace said support body between said assembled position and said disassembled position by at least a rotation about at least one rotation axis parallel to said longitudinal rotation axes.

A machine for producing packages of folded or interfolded laminar products made of paper material, in particular packages of napkins, tissues, towels, or similar products, said machine comprising a support frame configured to support:

• a feeding group configured to feed a first and a second web of paper respectively along a first and a second predetermined feeding direction;
• a cutting group configured to cut said first and second webs of paper, respectively, into a first and a second plurality of sheets of paper of predetermined length;
• a folding or interfolding group equipped with a first and a second counter-rotating folding roll adapted to rotate about respective longitudinal rotation axes and configured to fold or interfold said first and second pluralities of sheets of paper at a folding or interfolding zone, in such a way to obtain a stack of sheets folded or interfolded according to a predetermined folding or interfolding configuration, said cutting group and said folding or interfolding group being mounted on a same support body configured to move between an assembled position in which is adapted to be supported by said support frame, and a disassembled position, in which is not adapted to be supported by said support frame;
• said machine further comprising:
• a displacement group configured to displace said support body between said assembled position and said disassembled position wherein said displacement group and said support body are provided with respective engagement portions configured to engage with each other in such a way to allow said displacement group to displace said support body between said assembled position and said disassembled position with respect to said support frame;
• a first and a second plurality of detaching fingers configured, respectively, to cause said folded or interfolded sheets of paper to be detached from said first and from second folding or interfolding roll;
• a first and a second driving group configured, respectively, to cause an oscillatory back and forth motion of said first and of said second plurality of detaching fingers towards/from said folding or interfolding zone, in such a way to cause said folded or interfolded sheets of paper to be detached from said first and from said second folding or interfolding roll, said first and second driving groups being adapted to move, respectively, said first and said second plurality of detaching fingers in a predetermined reference position before that said displacement group is adapted to move said support body between said assembled position and said disassembled position, wherein
• said first and second driving groups are configured to slide along a predetermined sliding direction orthogonal to said longitudinal rotation axes of said folding or interfolding rolls in such a way to approach or move away said first and second pluralities of detaching fingers with respect to each other;
• and
• said first and second driving groups are, furthermore, configured to delay or anticipate the oscillatory motion of said first and second pluralities of detaching fingers with respect to a predetermined reference oscillatory motion, in such a way to delay or anticipate the instant (tr) at which said first and second pluralities of detaching fingers are adapted to cause, respectively, the folded or interfolded sheets of paper to be detached, respectively, from said first and from said second folding or interfolding roll.