Patent ID: 8607695

Claim:
A strap driving device for a strapping machine, comprising a device ( 8 , 9 ) for inserting, returning and tensioning a strap, the device ( 8 , 9 ) having at least one pair ( 13 , 17 ) of rollers ( 14 , 15 , 18 , 19 ) through which the strap ( 7 ) is drivably guided in an insertion direction (E) and opposite to the insertion direction (E) and is tensionable around the object ( 4 ) in the strapping machine opposite to the insertion direction (E); guide channel portions ( 10 , 11 , 12 ) for the strap ( 7 ) which lead toward the device ( 8 , 9 ) for inserting, returning and tensioning the strap ( 7 ) and which further on lead away from said device ( 8 , 9 ), with the guide channel portions ( 10 , 11 , 12 ) being provided with cheeks ( 20 , 21 , 24 , 25 ) guiding the strap ( 7 ) along both sides of its flat sides, wherein the at least one roller ( 14 , 18 ) on one side of the device ( 8 , 9 ) for inserting, returning and tensioning the strap ( 7 ) and the cheeks ( 20 , 24 ) of the guide channel portions ( 10 , 11 , 12 ) are mounted on the same side while the at least one roller ( 15 , 19 ) on the other side of said device ( 8 , 9 ) and the cheeks ( 21 , 25 ) of the guide channel portions ( 10 , 11 , 12 ) on said other side are mounted on a movable carrier which is displaceable in an opening direction (O) by means of an actuation device ( 32 , 33 , 34 ) between a working position with closed pairs ( 13 , 17 ) of rollers and guide channel portions ( 10 , 11 , 12 ) and a service position with open pairs ( 13 , 17 ) of rollers and guide channel portions ( 10 , 11 , 12 ) and wherein the movable carrier is a slide ( 29 ) which is mounted for displacement on a linear guide ( 30 ) running parallel to the opening direction (O).