Machine for sewing bag envelopes

Machine for sewing bag-like envelopes (100), in correspondence with an opening delimited by two free overlapping flaps (101), the machine (1) comprising:

• a support base (2);
• a sewing head (3) mechanically mounted on said support base (2), configured to make a sewing line on said free flaps (101) of said bag-like envelope (100) along a sewing direction;
• holding means (4) operatively associated with said sewing head (3) for retaining said free flaps (101) of said bag-like envelope (100);
• first movement means (5) operatively associated with said support base (2) and/or with said holding means (4) to achieve relative movement between said sewing head (3) and said holding means (4) along a first direction of movement (X) substantially parallel to said sewing line to allow said sewing head (3) to realize said sewing line on said free flaps (101);
• second movement means (6) for moving said sewing head (3) and/or said holding means (4) at least along a second movement direction (Y) substantially orthogonal with respect to said first movement direction (X);
• sensor means (7) operatively connected to said second movement means (6), comprising at least a first sensor (8) intended to face the free flaps (101) of said bag-like envelope (100) and configured to detect an extremal edge of said free flaps (101), extending substantially parallel to said first direction of movement;
• at least one electronic control unit electronically connected at least with said sensor means (7) and with said second movement means (6) for controlling said second movement means (6) to generate said relative motion between said sewing head (3) and said holding means (4) for said envelope (100) along said second direction of movement (Y) at least for a predetermined portion;
• wherein said electronic control unit is programmed to command said first movement means (5) and said second movement means (6) to generate a relative movement between said sewing head (3) and said holding means (4) along said first movement direction (X) and said second movement direction (Y) in such a way that said sewing line is made at a substantially constant distance with respect to said extremal edge of said free flaps (101) and at a distance substantially equal to said predetermined portion, and further comprising cleaning means (50), mechanically mounted on the sewing head (3) and configured to clean the extremal edges of the free flaps (101).

Machine for sewing bag-like envelopes (100), in correspondence with an opening delimited by two free overlapping flaps (101), the machine (1) comprising:

• a support base (2);
• a sewing head (3) mechanically mounted on said support base (2), configured to make a sewing line on said free flaps (101) of said bag-like envelope (100) along a sewing direction;
• holding means (4) operatively associated with said sewing head (3) for retaining said free flaps (101) of said bag-like envelope (100);
• first movement means (5) operatively associated with said support base (2) and/or with said holding means (4) to achieve relative movement between said sewing head (3) and said holding means (4) along a first direction of movement (X) substantially parallel to said sewing line to allow said sewing head (3) to realize said sewing line on said free flaps (101);
• second movement means (6) for moving said sewing head (3) and/or said holding means (4) at least along a second movement direction (Y) substantially orthogonal with respect to said first movement direction (X);
• sensor means (7) operatively connected to said second movement means (6), comprising at least a first sensor (8) intended to face the free flaps (101) of said bag-like envelope (100) and configured to detect an extremal edge of said free flaps (101), extending substantially parallel to said first direction of movement;
• at least one electronic control unit electronically connected at least with said sensor means (7) and with said second movement means (6) for controlling said second movement means (6) to generate said relative motion between said sewing head (3) and said holding means (4) for said envelope (100) along said second direction of movement (Y) at least for a predetermined portion;
• wherein said electronic control unit is programmed to command said first movement means (5) and said second movement means (6) to generate a relative movement between said sewing head (3) and said holding means (4) along said first movement direction (X) and said second movement direction (Y) in such a way that said sewing line is made at a substantially constant distance with respect to said extremal edge of said free flaps (101) and at a distance substantially equal to said predetermined portion,
• and wherein said first sensor (8) of said sensor means (7) comprises:
• at least a first optical emitter (30) configured to emit a first optical signal, and
• at least a first optical receiver (31) configured to receive the first optical signal emitted by the first emitter (31) and generate a corresponding first electrical reception signal and send it to the electronic control unit.