Feb. 25, 2012 - Envelope with zip fastener: The inventor of this envelope with zip fastener of paper is Alfons Miller of Augsburg/Germany. If people want to open this kind of envelope they don't need a letter-opener, knife or hair-pin. The perforated stripe on the back of the envelope works just like a zip fastener and is vary easy to handle.

- Image ID: E12XG1
Keystone Press / Alamy Stock Photo
Image ID: E12XG1
Feb. 25, 2012 - Envelope with zip fastener: The inventor of this envelope with zip fastener of paper is Alfons Miller of Augsburg/Germany. If people want to open this kind of envelope they don't need a letter-opener, knife or hair-pin. The perforated stripe on the back of the envelope works just like a zip fastener and is vary easy to handle. (Credit Image: Keystone Pictures USA/ZUMAPRESS)