A jet departed on the TEB DALTON VISUAL and level at 1;200 FT accelerated to 220 KTS where ATC reminded them of the 190 KT speed constraint.

Narrative

We departed TEB Runway 19. Flying the Dalton VFR departure we turned westbound staying VFR at 1;200 FT. Departure calls for a maximum speed of 190 KIAS. We stayed below this in the turn to keep the radius low but once established on the 280 heading the airplane was accelerated to about 220 KIAS. ATC came on the radio and advised us to slow down and maintain speed required by procedure. We did this and acknowledged their instruction. I think I inadvertently thought the max speed was just for the turn to stay out of Newark's approaches. I realize now that the speed is to be maintained until waived by ATC in a climb. You are also operating VFR below Class B airspace and in Class D airspace which also requires max speed of 200 KIAS which might also be why the speed limit is there. Normally New York Departure wants to keep you speed up to clear out of their airspace and maybe this is why I let the speed inadvertently creep up a little early. No excuse however. I will avoid this in the future by reviewing the departure more closely and maintain better speed control.