Patent ID: 9003851
Filing Date: 2015-04-14
Classification: B21D,B44B

Abstract:
1. An embossing device for embossing on a can barrel by an embossing turret, the embossing device comprising: a plurality of inner rolls and a plurality of outer rolls each rotating on a corresponding axis of the inner roll and a corresponding axis of the outer roll and revolving around a rotational shaft of the embossing turret in a synchronized way; a plurality of holding units revolving around the rotational shaft while conducting a predetermined contact and retract movement wherein at least one of the holding units contacts with and retracts from at least one of the inner rolls and a swing movement wherein at least one of the holding units is adapted to swing and push the can barrel to at least one of the inner rolls to rotatably hold the can barrel; a driving unit for rotating the can barrels, held by the plurality of holding units; and an encoder attached to the rotational shaft; wherein each of the plurality of holding units includes a sensor for detecting a match mark on the can barrel, and a rotational positioning controller for receiving signals from the sensor and the encoder and controlling the driving unit based on the signals, and the rotational positioning controller comprises a calculation processing part, a machine position detection part, and a control part for the driving unit, and the rotational positioning controller is configured so that