Abstract: A luggage includes a luggage body, a cover connected with the luggage body, and a handle assembly mounted in the cover. The luggage body has a depth greater than that of the cover. Thus, the luggage body has a volume greater than that of the cover, so that the luggage body and the cover construct an asymmetric structure. The cover is provided with a receiving groove recessed inward, and the handle assembly is mounted in the receiving groove of the cover. Thus, the handle assembly is arranged in the interior of the cover without extending into the luggage body.

Abstract: A foldable and portable shelter includes a base member and an upper member combined with the base member. The base member includes a bottom wall panel, a rear wall panel, and a front wall panel. Each of the rear wall panel and the front wall panel has a periphery provided with multiple first reinforcing ribs each having an arcuate concave surface. The upper member includes a top wall panel and two opposed side wall panels. Each of the top wall panel and the side wall panels has a periphery provided with multiple second reinforcing ribs each having an arcuate concave surface. Each of the second reinforcing ribs overlaps the respective first reinforcing rib so that the second reinforcing ribs cooperate with the first reinforcing ribs to reinforce the strength of the upper member and the base member.

Abstract: A foldable and portable shelter includes a base member and an upper member combined with the base member. The base member includes a bottom wall panel, a rear wall panel, and a front wall panel. Each of the rear wall panel and the front wall panel has a periphery provided with multiple first reinforcing ribs each having an arcuate concave surface. The upper member includes a top wall panel and two opposed side wall panels. Each of the top wall panel and the side wall panels has a periphery provided with multiple second reinforcing ribs each having an arcuate concave surface. Each of the second reinforcing ribs overlaps the respective first reinforcing rib so that the second reinforcing ribs cooperate with the first reinforcing ribs to reinforce the strength of the upper member and the base member.

Abstract: A shelter includes a base member having a bottom wall panel, a rear wall panel and a front wall panel foldably coupled to the bottom wall panel with folding lines, an upper member having a top wall panel and two opposed side wall panels foldably coupled to the top wall panel with folding lines, the side wall panels of the upper member are secured to the bottom wall panel of the base member for forming a three-dimensional structure, the front wall panel and the rear wall panel of the base member are selectively latched to the top wall panel and the side wall panels of the upper member, the base member and the upper member each include a number of air circulation openings, and each include a number of reinforcing curved portions.

Abstract: An accordion-like file includes a rear panel having a folded base panel, a front panel having a folded bottom panel movable toward and away from the base panel of the rear panel, an expandable connecting member disposed between the rear panel and the front panel, and a coupling panel for adjustably coupling the bottom panel of the front panel and the base panel of the rear panel together, and for guiding and for limiting the front panel to slide relative to the rear panel. The coupling panel includes one or more grooves, and the front and the rear panels each includes one or more fasteners slidably engaged in the grooves of the coupling panel for guiding and for limiting the front and the rear panels to slide relative to the coupling panel.

Abstract: A file device includes one or more cover members each having one or more surfaces ground or polished into a smooth surface and formed as a white board for note making purposes. The notes may be easily removed with board erasers, toilet papers, hands of users, etc., such that no paper sheets will be wasted. One or more inner sheets may further be attached to the cover member with such as clips or binding members, and each may include one or more surfaces ground or polished into a smooth surface and formed as a white board for note making purposes.

Abstract: A multi-layer board device includes a an inner layer made of foamable materials, two outer layers disposed on two opposite outer sides of the inner layer, and two intermediate layers disposed between the inner layer and the outer layers, for bonding the inner layer between the outer layers. The inner layer may be made of the lighter foamable or waste or recycled materials, and the outer layers may be made of stronger plastic or synthetic materials for solidly retaining the inner layer between the outer layers, and for forming the stronger but lighter board device.

Abstract: A method for forming boards of foamable materials, includes preparing two plastic materials and disposing or extruding and mating a foamable material between the plastic materials, to form a board having two outer layers formed by the plastic materials, and an intermediate layer formed by the foamable material. An air or a foamable agent may be injected or combined into the foamable material before conducting the extruding process, in order to foam or expand the foamable material, and to decrease the density and the weight of the foamable material and the boards. The air may be selectable from carbon dioxide, propane, or butane, or other air.

Abstract: A method for forming boards of foamable materials, includes preparing and heating two plastic materials and a foamable material which is disposed between the plastic materials. The plastic materials and the foamable material are then squeezedto form a board having two outer layers formed by the plastic materials, and an intermediate layer formed by the foamable material. An air or a foamable agent may be injected into the foamable material before conducting the squeezing process, in order to decrease the density and the weight of the foamable material and the boards.

Abstract: A file holding device includes a cover device having an intermediate layer made of foamable materials, and two outer layers secured onto the two opposite outer sides of the intermediate layer, for solidly retaining the intermediate layer between the outer layers. The intermediate layer may be made of the lighter foamable materials, and the outer layers may be made of stronger plastic or synthetic materials for solidly retaining the intermediate layer between the outer layers, and for forming the stronger but lighter cover device.