Concrete formwork

Abstract

The "concrete formwork" of the claimed design is used when forming a structure surrounded by formwork or when pouring concrete into the wall of a tunnel. As shown in the "reference perspective view showing the state of use," it has recesses on both sides that fit into isosceles trapezoidal protrusions on the upper part of the lower formwork, and a stop plate inside the recesses to prevent the protrusions from shifting left and right, and there are no connecting protrusions or recesses on the concrete pouring surface (front) of the formwork. Because the product is used in stacks, it may also have protrusions on both sides of the upper part of the claimed product.

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