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Historical Overview of Press Development
In simple configurations, presses
have been used since antiquity to extract or
Press oil and other substances from vegetable matter. A simple primitive form of lever press is
illustrated in Figure 1. A pole or timber
is placed under a rock ledge, which serves as a fixed pivot. The material to be pressed is placed on a
suitable hollowed out stone, which also acts to gather the liquid pressed from the material. The liquid is collected in a simple
container. Pressure is supplied by
stones placed on the end of the timber.
This type of press is still used by primitive cultures. [1] [1] R. Ellen, A Vertical Wedge Press from the Banda Islands , Technology and Culture, January 1992, Volume 33, Number 1, © The University of Chicago Press. In this article a photograph of a level beam press together with a drawing of the wedge press principle are shown. The evolution of the design of the wedge press shown in figure 2 is considered to have originated in ancient China , and the design used elsewhere.
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