CLAMP Russian patent published in 2017 - IPC B42F1/00 

FIELD: satisfaction of human life necessities.

SUBSTANCE: invention relates to devices for releasably fastened sheets together without piercing the latter. The clamp is made in the form of an integral element with two mutually movable outwardly folded branches connected by a prestressed arch-shaped back, with levers for branching. There can be two backs in the assembly, the inner of which can have a circle or a square in the section, and the outer one - a circle, or an oval, or a square. The outer backs can have two openings on the parts distant from the parts that connect the branches for the alternative branch levers.

EFFECT: increased retention capacity and expanded functionality of the clamps.

2 dwg