Abstract: A face mask comprising a front part (1) and a back part (4), wherein the back part (4) is beak-shaped and the front part (1) is installed to match the outline of the back part (4) and a bracket (3), that forms a pliable rigid arc starting at jaw level on one cheek in front of or over the nose, is installed to form an arc leading to the other side of the jaw, the front part (1) is applied slightly stretched over the outline of the bracket (3), and a filter is enclosed between the front part and the bracket.

Abstract: A picture frame comprises a viewing window side (1) and a frame side (2). There is a interstice between the viewing window and the frame side. The viewing window and frame sides comprise assembly components (5) in order to assemble the viewing window and frame sides together. An assembly component on the frame side comprises a flexible protruding clamping part (51) provided with a clamping section (52) on a side facing the viewing window (3) and the viewing window (3) is provided with a complementary clamping section (31) at an edge of the viewing window (3) with the complementary clamping sections (52, 31) fitting into each other and with, when assembled, the protruding clamping parts (51) on the frame side exert a clamping force (F2) on the viewing window with the direction of the clamping force (F2) being mainly in the flat plane of the viewing window.

Abstract: An assembly for, for example, a photo collage featuring first (1) and second elements (3), with the first elements (1) containing a flat panel and the second elements forming coupling members (3) to interconnect the first elements. The first elements (1) feature as openings (2) near a corner of the flat panel at least two notches (9) in the edges and the coupling member features at least two complementary protrusions (5) that work together with the notches (9).

Abstract: An assembly for, for example, a photo collage featuring first (1) and second elements (3), with the first elements (1) containing a flat panel and the second elements forming coupling members (3) to interconnect the first elements. The first elements (1) feature as openings (2) near a corner of the flat panel at least two notches (9) in the edges and the coupling member features at least two complementary protrusions (5) that work together with the notches (9).

Abstract: A stretcher comprises frame sections. The frame sections comprise two extruded profiles (B, D) whereby the outer profile is made of a softer material than the inner profile. The inner, hard profile (D) gives firmness to the stretcher, while the softer profile (B) provides flexibility. The softer profile is fitted with a flexible wall that can hinge around a hinge line. This makes it possible to accommodate variations in canvas tension, while at the same time ensuring a strong stretcher. The frame sections are fitted with adjustment mechanisms-(F, L).