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Karl F. Schoeller Sr.
and the
Blood Plasma Invention

During the World War II years, the late Perkasie resident, Karl F. Schoeller Sr., participated in development of a process to separate plasma from whole blood. The plasma could then be used in the battlefields “so that everyone could receive the same life-giving fluid regardless of blood type.”
The experiment was led by Dr. Reichel at the Chester County estate of Hollis Wolstenholme. Karl was asked for his help with the refrigeration aspect of the project.
The process involved centrifuging or spinning blood at a high speed, to separate the liquid and solid components. When the centrifuge was immersed in an icy bath the plasma would freeze against the wall of the tank. The plasma could then “be scraped off in its frozen state and flown to its destination.”
After many hours of “trying alternate methods that might give better results and coping with unit failures at crucial moments, the process was successful." Karl then helped install similar equipment at Walter Reed Hospital, The Army War College and at Ben Venue Laboratories in Ohio.
Karl’s associates at the Laboratory encouraged him to apply for a patent for his design of a vapor condenser. On September 26, 1944 the patent was issued. For Karl, “owning a patent had no monetary value, although it did much for his self-esteem.”
The experiment was led by Dr. Reichel at the Chester County estate of Hollis Wolstenholme. Karl was asked for his help with the refrigeration aspect of the project.
The process involved centrifuging or spinning blood at a high speed, to separate the liquid and solid components. When the centrifuge was immersed in an icy bath the plasma would freeze against the wall of the tank. The plasma could then “be scraped off in its frozen state and flown to its destination.”
After many hours of “trying alternate methods that might give better results and coping with unit failures at crucial moments, the process was successful." Karl then helped install similar equipment at Walter Reed Hospital, The Army War College and at Ben Venue Laboratories in Ohio.
Karl’s associates at the Laboratory encouraged him to apply for a patent for his design of a vapor condenser. On September 26, 1944 the patent was issued. For Karl, “owning a patent had no monetary value, although it did much for his self-esteem.”
Sergio Would Be Proud
Pennridge barber and resident, the late Sergio Vera, had an idea around 1970 that he hoped would keep Pennridge residents’ home for the Independence Day holiday. His idea was for a day bringing residents together to enjoy food, play games, listen to music, and just have fun.
Sergio Vera, a native of Chile, visited Philadelphia as a member of the Chilean Navy. It was during a dance in Philadelphia that he would meet Christie Nellis. They were married in 1952 and settled in the Pennridge area in 1954. Sergio was a barber by trade who volunteered many hours to make the Pennridge area a better place.
Sergio Vera, a native of Chile, visited Philadelphia as a member of the Chilean Navy. It was during a dance in Philadelphia that he would meet Christie Nellis. They were married in 1952 and settled in the Pennridge area in 1954. Sergio was a barber by trade who volunteered many hours to make the Pennridge area a better place.

To make his idea reality, Sergio chaired a committee and enlisted Bob Spanninger, from the Pennridge Chamber of Commerce, Bill and Dot Street, from Perkasie Fire Company, Mrs. Ralph Powers, Mrs. Dorothy Rosenberger, and Mrs. Ephraim Walters. The committee recruited and organized the police and fire companies and local volunteer groups to help run the events. On July 2, 1972, Pennridge Community Day was held for the first time.
Bob Spanninger, an organizer 50 years ago recalls that the event started out small but was successful in providing a fun community activity. Dot Street remembers that many Perkasie Fire Company members volunteered for the event. They both agreed that Community Day continues due to the dedication of the sponsors and volunteers during the last 50 years.
Bob Spanninger, an organizer 50 years ago recalls that the event started out small but was successful in providing a fun community activity. Dot Street remembers that many Perkasie Fire Company members volunteered for the event. They both agreed that Community Day continues due to the dedication of the sponsors and volunteers during the last 50 years.
On July 10, 2022, Pennridge Community Day will celebrate its 50th Anniversary. The celebration has grown over the years. Many events that happened 50 years ago like the three-legged race and canoe race still occur. Thousands of people stay in the area and enjoy Community Day, especially the fireworks.
Sergio would be proud!
Sergio would be proud!
Rick Doll 2022
Memories of Perkasie
Sharing interesting connections between Perkasie's people, places and events.
Rick and Louise Doll
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