Mixing and dispensing apparatus for a frozen confection machine

Mixing and dispensing apparatus for a frozen confection machine having a refrigerated freeze chamber comprising, mixing and measuring chamber means including a mixing cylinder having a cylindrical inner side wall, a discharge head having an inner face extending across one end of the mixing cylinder and piston means slidable in the mixing cylinder, a discharge passage in the discharge head opening at said inner face, discharge valve means mounted on the discharge head for movement between a closed position blocking flow through said discharge passage and an open position, the mixing and measuring chamber means having a confection inlet port and confection inlet valve means movable between a closed position blocking flow through the inlet port and an open position, the mixing and measuring chamber means having a flavoring material inlet port and a flavoring material feed cylinder communicating with said flavoring material inlet port, a feed piston slidable in the feed cylinder between an extended position in which one end of the feed piston is adjacent said mixing and measuring chamber and a retracted position in which said one end of the feed piston is spaced from the flavoring material inlet port to receive a charge of flavoring material, mixer means mounted for rotation coaxially of the mixing cylinder, piston means mounted in the mixing cylinder for rotation with the mixer means and for sliding movement relative to the mixing cylinder and relative to the mixer means between a first position in which an end face of the piston means is contiguous to the inner face of the discharge head and a second position in which the piston end face is spaced from the discharge head , motor means operable to drive said rotary mixer means, and means for moving said piton means from said second position to said first position to discharge material from the mixing and measuring chamber.

Mixing and dispensing apparatus for a frozen confection machine comprising, mixing and measuring chamber means including a mixing cylinder having an inner cylindrical side wall;

• a discharge head having a flat inner face extending across one end of the mixing cylinder;
• and piston means slidable in the mixing cylinder, the mixing and measuring chamber means having a confection inlet port and a flavoring material inlet port, a discharge channel in the discharge head having a lengthwise extending side opening intersecting said inner face and a discharge outlet at one end of the channel, a discharge valve member slidably mounted in the discharge channel and operable between a retracted position spaced from the discharge outlet and an extended position adjacent the discharge outlet, the discharge valve member having a cross section complementary to the channel to substantially fill the same in said extended position and a flat side substantially flush with the inner face of the discharge head, rotary mixer means mounted in the mixing cylinder coaxially thereof and extending closely adjacent said inner face of the discharge head, means operable to rotate the mixer means, the piston means being mounted in the mixing cylinder for rotation with the mixer means and for sliding movement relative the mixing cylinder and to the mixing means and movable between a first position in which an end face of the piston means is contiguous to the inner face of the discharge head and a second position in which the piston means end face is spaced from the discharge head.