Patent ID: 8684229

Claim:
A dispenser, comprising: (a) at least a first reservoir and a second reservoir, for containing a first and a second component for a dental material, respectively; (b) a first and a second plunger driven by a first drive for advancing the first and the second components from the first and the second reservoirs, respectively; (c) a mixer driven by a second drive for mixing the first and second components to form the dental material from the first and second components; and (d) a dispensing portion, wherein the first drive is configured to operate based on a first predetermined, non-uniform drive speed profile to first advance the first and second components from the first and second reservoirs, then, after advancing the first and second components from the first and second reservoirs, retract the first and second plungers to relieve built-up pressure within the first and the second reservoirs, and, after relieving built-up pressure within the first and the second reservoirs, stop the first and second plungers at positions more advanced than prior to the advance of the first and second components from the first and second reservoirs.