Patent ID: 6578337
Filing Date: 2003-06-17
Classification: B65B,Y10T

Abstract:
A device for tightening strapping bands including an abutment and with a tensioning wheel provided with a return stop driven by a tensioning motor by means of gearing, said tensioning wheel forms a tensioning channel with said abutment to tighten ends of said band, said tensioning wheel arranged in a gearing block with said tensioning motor and the gearing, said tensioning wheel, said gearing block and said tensioning motor pivotally mounted around a first stationary axis in a base frame of the device, said tensioning wheel held by holding means mounted with friction on a tensioning wheel pin, said tensioning wheel in its ineffective position is lifted from one of said band ends and is pivoted against said abutment under the action of a pressure element when said tensioning wheel starts in the tensioning direction and said holding means loses its effective position, characterised in that said tensioning wheel can be driven by said tensioning motor in the tensioning direction and in the opposite direction and that a return stop is a freewheel with a brake which blocks the reverse rotation of said tensioning wheel when said tensioning motor stops, but allows a reverse rotation of said tensioning wheel when said tensioning motor reverses, and said tensioning wheel mounted rotatably on a tensioning wheel pin in an eccentric with friction, which in turn is guided rotatably in a steering lever which is pivotally mounted on a second stationary axis on said base frame and that another freewheel is arranged against said tensioning direction between said tensioning wheel pin and said eccentric.