Patent ID: 9370919
Filing Date: 2016-06-21
CPC Classification: B23Q,B32B,B65H,F16K,G02F

Claim Text:
1. A vacuum suction adjustable transfer roller, comprising: a roller body and a plurality of adjustment devices mounted to the roller body, the roller body comprising a plurality of air draw-in passages uniformly distributed therein, the air draw-in passages drawing in air by means of an air evacuation device, each of the adjustment devices comprising: a valve arranged in each of the air draw-in passages, a piezoelectric ceramic piece connected to the valve, and a control circuit electrically connected to the piezoelectric ceramic piece, the control circuit controlling an intensity of an electric field applied to the piezoelectric ceramic piece so that the piezoelectric ceramic piece undergoes deformation under the action of the electric field and the valve is caused by the deformation of the piezoelectric ceramic piece to selectively insert into or withdraw out of the air draw-in passage so as to control flow of air drawn in by the air draw-in passage and thus controlling a magnitude of a vacuum suction force induced by the air draw-in passage; and wherein the roller body comprises an insertion slot corresponding to each of the air draw-in passages and the valve selectively insertable into and removable out of the air draw-in passage through the insertion slot to selectively close and open the air draw-in passage.