Shutter mounted shutter. (Machine-translation by Google Translate, not legally binding)

摘要

Pressure-fitted shutter characterized in that the successive slats that make it up and that have a straight and smooth inner face and a slightly angled outer face with an outward vertex have a straight neck in their upper central part that extends forming an 180º arc whose line of external contact corresponds located two slats at a right angle to the opening that is in the lower part formed by two edges one arched 180º inward and the other at an acute angle also inward so that the end of that neck is inserted inside This opening cannot be retracted by the pressure of the edge formed by the acute angle and the hook formed by the two expressed arches. (Machine-translation by Google Translate, not legally binding)