3 results about "Along edge" patented technology

The utility model discloses a kind of edge folding devices of bag making machine, including the bearing platform of bearing sheet, and the edge folding component in the edge folding direction of sheet is located in the side of bearing platform. Edge folding component includes the main bending unit of being movably arranged in the side of bearing platform along edge folding direction and the height direction of bearing platform, and the auxiliary bending unit of being arranged above bearing platform, can be moved towards sheet edge. When the size of making packaging bag changes, after causing the change of first alignment position and auxiliary pressing position, the moving stroke of main bending unit in edge folding direction can be changed, and the moving stroke of auxiliary edge folding unit, then make main bending unit move to the first alignment position after change, auxiliary bending unit moves to the auxiliary pressing position after change, then carry out edge folding action again, to reach the purpose of adapting different size packaging bag, so this edge folding device of bag making machine has the advantage of wide application range.

A cover (10) for an opening (40) has at least three elements (11), each element (11) having an upper end (12), a lower end (13), and edge sides (14), wherein the elements (11) are connected and / or connectable to each other in pairs at the edge sides (14), and wherein, in a first arrangement, the elements (11) substantially form the lateral surface of a truncated pyramid, the upper ends (12) of the elements (11) defining an opening (18), and wherein, in a second arrangement, the elements (11) can be arranged substantially flat, one above the other or side by side. Each element (11) is substantially planar, and each element (11) has the shape of a truncated triangle or a trapezoid. Each element (11) further has at least one connecting element (20) on each edge side (14), wherein the elements (11) are connected and / or connectable to each other on the edge sides (14) via the connecting elements (20).Preferably, two connecting elements (20) are connected to each other via a bolt which is fixed or fixable in two adjacent connecting elements (20).