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Class Information
Number: 402/67
Name: Binder device releasably engaging aperture or notch of sheet > Sheet retainer with releasable keeper (e.g., hold down, etc.) > Keeper including wedge type securing means > With screw threaded wedge driving means
Description: Device in which the wedge-type securing means for the keeper is actuated by the rotation of a helically grooved member associated therewith.

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