An envelope is a common packaging item, usually made of thin flat material. It is designed to contain a flat object, such as a letter or card.Traditional envelopes are made from sheets of paper cut to one of three shapes: a rhombus, a short-arm cross, or a kite. These shapes allow for the creation of the envelope structure by folding the sheet sides around a central rectangular area. In this manner, a rectangle-faced enclosure is formed with an arrangement of four flaps on the reverse side.When
the folding sequence is such that the last flap to be closed is on a short side it is referred to in commercial envelope manufacture as a pocket - a format frequently employed in the packaging of small quantities of seeds. Although in principle the flaps can be held in place by securing the topmost flap at a single point (for example with a wax seal), generally they are pasted or gummed together at the overlaps. They are most commonly used for enclosing and sending mail (letters) through a prepaid-postage postal system.Window envelopes have a hole cut in the front side that allows the paper within to be seen. They are generally arranged so that the receiving address printed on the letter is visible, saving the sender from having to duplicate the address on the envelope itself. The window is normally covered with a transparent or translucent film to protect the letter inside, as was first designed by Americus F. Callahan in 1901 and patented the following year. In some cases, shortages of materials or the need to economize resulted in envelopes that had no film covering the window.[citation needed] One innovative process, invented in Europe about 1905, involved using hot oil to saturate the area of the envelope where the address would appear. The treated area became sufficiently translucent for the address to be readable. As of 2009 there is no international standard for window envelopes, but some countries, including Germany and the United Kingdom, have national standardsHow to Write Address in Envelope?Be sure to write neatly when addressing your envelope so your letter will reach its correct destination.Include the following three items:ADDRESS: This is the name and address of the person (recipient) you are sending the letter to. On separate lines write: Recipient's Full Name Street Address City, State and Zip CodeUse postal abbreviations when writing the state. Postal abbreviations are written in capital letters without periods or other punctuation. The postal abbreviation for North Carolina is NC. RETURN ADDRESS: This is the information about the sender of the letter. In the top left corner on separate lines write: Your full name Your Street Address Your City, State and Zip CodeSTAMP: In the top right corner of the envelope you place a postage stamp. This pays for the delivery of the letter. To mail a letter, you do not need to visit the Post Office as long as you have postage stamps, access to a postage meter or can print postage online from a company like Stamps.com. Simply address your envelope, affix postage to the upper right corner and drop it in a collection box or hand it to your mail carrier..Creative Envelope Designinstall now for inspiration of Creative envelope.
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