Device for splicing strips of thermoplastic material
AssigneeG. D. Societa per Azioni
InventorFiorenzo Draghetti
Life of this patent
Estimating the term…
Abstract
A device for splicing strips of thermoplastic material to splice a first strip extending along a first path and a second strip extending along a second path; the device having first guides for guiding the first strip, and second guides for guiding the second strip, the first and second guides being movable with respect to each other to bring together a portion of the first strip and a portion of the second strip; a heat-seal block movable between a rest position and a work position to grip and heat seal the portions of the first and second strips between the heat-seal block and the second guides; and a heatable element which is movable to intercept a portion of at least one of the first and second strips and cut the strip by melting the portion of the strip contacting the element.
Claims7
A device for splicing strips of thermoplastic material to splice at least a first strip (5a) extending along a first path (Pa), and a second strip (5b) extending along a second path (Pb);
- the device (7) comprising first supporting and guide means (18) for the first strip (5a), and second supporting and guide means (14) for the second strip (5b), the first and second supporting and guide means (18, 14) being movable with respect to each other to bring together a portion (61) of the first strip (5a) and a portion (60) of the second strip (5b);
- a heat-seal block (48) movable between a rest position and a work position to grip and heat seal said portions (61;
- 60) of the first and second strips (5a, 5b) between said heat-seal block (48) and said second supporting and guide means (14);
- and movable cutting means (55) for intercepting and cutting at least one of said first and second strips (5a, 5b);
- wherein said cutting means (55) comprises a heatable element (55) which is brought into contact with said at least one of said first and second strips (5a, 5b) to melt a portion of said at least one of said first and second strips (5a, 5b);
- said heatable element (55) comprising a first wire (55) made of conductive material and movable along a given first trajectory (A) intercepting said first path (Pa) to cut said first strip (5a), said first supporting and guide means (18) comprising a heat-seal and cutting tool (18) rotatable about a first axis (19) and comprising said first wire (55) and said heat-seal block (48) parallel to said first wire (55);
- said first wire (55) being located at a relatively small distance with respect to said heat-seal block (48).
A device for splicing strips of thermoplastic material to splice at least a first strip (5a) extending along a first path (Pa), and a second strip (5b) extending along a second path (Pb);
- the device (7) comprising first supporting and guide means (18) for the first strip (5a), and second supporting and guide means (14) for the second strip (5b), the first and second supporting and guide means (18, 14) being movable with respect to each other to bring together a portion (61) of the first strip (5a) and a portion (60) of the second strip (5b);
- a heat-seal block (48) movable between a rest position and a work position to grip and heat seal said portions (61;
- 60) of the first and second strips (5b, 5b) between said heat-seal block (48) and said second supporting and guide means (14);
- and movable cutting means (55) for intercepting and cutting at least one of said first and second strips (5a, 5b);
- wherein said cutting means (55) comprises a heatable element (55) which is brought into contact with at least one of said first and second strips to melt a portion of said at least one of said strips (5a, 5b);
- the device further comprising a cutting tool (16) for removing a surplus portion of the second strip (5b);
- said surplus portion extending between said second supporting and guide means (14) and a pin (20) for retaining an end of said second strip (5b);
- said cutting tool (16) comprising a second wire (40) made of heatable conductive material and movable along a second trajectory (G);
- said second wire intercepting said second strip (5b) extending along the second path (Pb) to detach said surplus portion of the second strip (5b);
- said lever (14) comprising a third arm (31;
- 62) having an end surface (35;
- 64) which cooperates with said cutting tool (16) when said lever (14) is in the rest position;
- said third arm (31, 62) comprising a groove (38;
- 66) formed along said end surface (35;
- 64) and parallel to said second axis (15);
- said second wire (40) occupying said groove (38;
- 66).
Dependencies are inferred from the claim text.