Curtain patent

At the beginning of primitive cave and semi-cave era, windows were only used to cut or leave very rough holes in walls and ceilings or openings similar to skylights in Indian conical tents, and their basic use was limited to ventilation. These holes and openings are usually covered with fabric of animal skin or grass. The ancient windows of the Han Dynasty in China were covered with enough paper, and the window holes were very small and dense: first, they were burglarproof; Second, the window is too big and the paper is not easy to be blown away by the wind. After the appearance of cloth art in Song Dynasty, people used it as window decoration, because it has rich patterns and sufficient light, showing a variety of curtains. 184 1 year, American John Hampson invented the modern shutter and obtained the invention patent. Shutters are the ancestor of simple curtains (functional finished curtains). 1946, Henry Sonaby and Joe Hunt established a joint venture company, and developed new technologies and equipment for aluminum alloy continuous casting processing technology, thus producing light aluminum alloy venetian blinds sheets. The indoor aluminum alloy venetian blind adopts the unique AA60 1 1 Al-Mg-Si alloy with high elasticity, which has good flatness and elasticity, is not easy to bend and deform, and is durable; The surface is enamel paint, painted three times and baked three times. The coating has strong adhesion, corrosion resistance, uniform color and lasting brightness as new. Provide a variety of customization options in form, curtain width, color and control. After the appearance of aluminum shutter doors, they became popular rapidly because of their obvious advantages over other curtains. 1985 hunter fashion curtain launched Lydia? 0? Organ curtain, unique honeycomb design makes this curtain soft, energy-saving and durable. Hollow design can effectively insulate heat in summer and keep indoor warm in winter. 199 1 year? 0? Soft gauze curtain is the first brand-new design, which has both decorative and shading functions. The double-layer shading design can effectively adjust all kinds of light. The design of the built-in top groove makes the curtain completely hidden in the top groove when it is completely folded. 1994 yingya? 0? Fashion roman blinds came out, and the sophisticated technology made the curtains cut neatly inside and outside. Soft texture and modern materials and colors provide curtains with three different folding sizes and lighting control options. 1996 Luo Meiya? 0? Three soft curtains and a dry remote control came out. Romea? 0? The unique soft tulle material and simple electric remote control of the three-wire curtain provide perfect lighting control and ideal privacy protection. Facette in 2004? 0? 3 and Alustra? 0? Series 3 appeared in 2004. Feisette? 0? 3. Warm fabric curtains with strong sense of design are perfectly integrated with simple design style. Lu Si Tra? 0? 3 style design and fine decoration can be achieved with the help of various dealers. Scarlett in 2006? 6? The appearance of flexible curtain provides window decoration and shading scheme for windows of different sizes. Scarlett? 6? Flexible open screen curtains can also be used as partitions to divide different spaces. During the same period, Duette? 0? 3 Architella？ 0? With the introduction of honeycomb curtain, the new generation of organ curtain has the most advanced technology patent, and the double-layer honeycomb structure has reached the highest level in energy saving. In 2008, Hunt introduced its patented nano roller shutter, which is mainly used for inclined windows and can be embedded between window frames close to glass.