Patent ID: 8147237

Claim:
A hot runner system ( 100 ), comprising: a first surface ( 205 ) being elastically deformable; a second surface ( 210 ) forming, in cooperation with the first surface ( 205 ), a melt-leakage gap ( 215 ) being located between the first surface ( 205 ) and the second surface ( 210 ); and an active material ( 220 ) being: (i) coupled with the first surface ( 205 ), (ii) held normally stationary, (iii) configured to be operatively coupled with a signal source ( 225 ), and (iv) configured to elastically deform in response to receiving a signal from the signal source ( 225 ), upon elastic deformation of the active material ( 220 ), the first surface ( 205 ) becomes moved toward the second surface ( 210 ) such that a size ( 235 ) of the melt-leakage gap ( 215 ) becomes controlled.