Peru Historical Society

Dr. Joe Mini’s Invention

Dr. Joseph Louis “Joe” Mini is probably best remembered in LaSalle County for his distinguished career in education. But hidden in the records of the United States Patent Office is a surprising piece of Peru history: while serving as superintendent of Oglesby schools, Mini designed and patented a liquid soap dispenser.

It is an unexpected addition to the story of a man already known as an educator, author, regional superintendent, and World War II veteran.

An idea takes shape in Peru

On 28 September 1962, Joseph L. Mini of 2107 Wynnewood Lane in Peru filed an application for a “Liquid Soap Dispenser.” The United States Patent Office granted Patent No. 3,159,317 on 1 December 1964.

The patent drawing looks like something from a futuristic 1960s kitchen. The tall, tapered dispenser had a broad button on top, a curved faucet near the bottom, and a rubber suction cup underneath.

Its internal operation was more sophisticated than its simple exterior suggested.

Pressing the top button activated a system of rods, springs, and piston discs. The mechanism captured a measured quantity of liquid and forced it through the faucet. When the button was released, the piston returned to its original position, ready for another use.

Mini was not merely designing a soap container. He was creating a reusable dispenser that automatically measured the liquid released with each press.

Solving an everyday problem

The patent explains the problem Mini wanted to solve. Concentrated liquid soaps and detergents were generally kept in small containers that had to be found whenever they were needed. People also estimated how much to use, sometimes dispensing too little and sometimes wasting the product by using too much.

Mini’s design would remain within easy reach while delivering a consistent amount each time.

Several features contributed to its practicality:

• A rubber suction cup held the dispenser securely on a sink board or worktable.
• The piston mechanism automatically measured the liquid.
• The large button could be pressed with a finger, thumb, or the heel of the hand.
• The removable top made the container refillable.
• Detachable sections allowed it to be cleaned and inspected.
• The dispenser could be removed from its base and carried elsewhere.

The patent described the intended device as simple, rugged, durable, easy to manufacture, and inexpensive.

Was it inspired by local schools?

Because Mini was a superintendent of Oglesby schools when he applied for the patent, it is tempting to wonder whether something he observed in his school system inspired the invention.

Its stable base, easily pressed top, and measured dose certainly sound useful in a building filled with children. However, the patent does not mention school restrooms or children. Instead, Mini described it as a household implement for dispensing liquid soaps and detergents.

Unless another source is discovered, the origin of his idea remains an intriguing, unanswered question.

Another side of Dr. Joe Mini

This invention represents only one small part of Mini’s remarkable life. He served in World War II aboard USS LST-590, became a respected school administrator, wrote about child development, earned a doctorate, served for approximately two decades as LaSalle County regional superintendent of schools, and with his wife Leah raised two children. And that is just a short list of his accomplishments. Rather, his contributions to local education are far too extensive to explore properly in this brief account and deserve a story of their own.

For now, his 1964 patent gives us a fascinating glimpse of another side of Dr. Joe Mini. He was not only an educator and public servant, but also a practical problem-solver who believed that even an ordinary household object could be improved.

Sources:

“Mentioned as County Candidate,” The Times (Ottawa, Ill.), 31 January 1966, p. 2, Newspapers.com (https://www.newspapers.com/image/543086158/ : accessed 7 September 2026).

“Joe Mini,” The Times (Ottawa, Ill.), 9 October 2002, p. 2, Newspapers.com (https://www.newspapers.com/image/544537123/ : accessed 7 September 2026).

Joseph L. Mini, “Liquid Soap Dispenser,” U.S. Patent 3,159,317, filed 28 September 1962 and issued 1 December 1964, Google Patents (https://patents.google.com/patent/US3159317A/en : accessed 7 September 2026).

“U.S., Public Records Index, 1950-1993, Volume 2,” Joseph L. Mini, database, Ancestry (https://www.ancestry.com : accessed 7 September 2026).