Suiter Swantz IP takes a look back at past inventions and inventors with our Patent of the Day.  

On this day in 1962, Ira L. Lopata were granted U.S. Patent No. 3,040,935 for a DOUGHNUT, PASTRY AND CAKE FILLER.

An excerpt from the patent states:

This invention relates in general to a machine for automatically delivering pre-determined quantities of a semi liquid material such as jelly, cream, custard, batter, dough, and the like, and more particularly, the invention contemplates a machine of the type that includes a bowl or receptacle for a filling material such as jelly, and a motor—driven measuring and pumping apparatus for drawing the material from the bowl in measured quantities and injecting it through a nozzle into a doughnut, a piece of pastry, a cake, a baking pan, or the like.

A primary object of the invention is to provide a machine of this character which shall embody a novel and improved construction whereby a plurality of the bowls can be easily and instantly interchangeably mounted in the machine so that the machine may be utilized selectively and with a minimum of difficulty and loss of time for handling any desired type or flavor of filling.

Another object of the invention is to provide such a machine which shall include a novel and improved unit comprising a bowl or receptacle and a pump or ejecting means for the filling material, and a novel combination thereof with a main frame or base and motor-operated driving mechanism, whereby the bowl and pump unit, at the will of the operator, can be easily and instantly set on and removed from the base or main frame and connected to and disconnected from a driving shaft, respectively, easily and instantly and without the use of tools, and the amount of filling material ejected from the filling nozzle can be easily and instantly varied as by a mere “flick of the wrist” of the operator.

A further object is to provide in a machine for filling doughnuts, pastry, cakes, baking pans, and the like, a novel and improved combination of a bowl, a positive displacement pump, and filling nozzles which shall eliminate dripping of the filling material from the nozzles after operation of the pump has stopped, which shall positively and smoothly move the filling material from the bowl to the nozzle, which shall be smooth running and practically noiseless, and which can be easily and quickly assembled and disassembled for cleaning, inspection, and repair.

Other objects of the invention are to provide such a machine which shall be light in weight and easily portable, which can be economically operated by a relatively unskilled person and with low power consumption.

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