Manual system for folding A4-size sheet of paper uses foldable envelope with flaps having tabs that fold to form stop used during positioning of sheet, and has hollowed tab allowing removal of sheet

摘要

Foldable envelope (1) has flap (2) with tabs, each with folding zone allowing folding of tabs at back of other flap (3). Folding zones are also used as stop during positioning of sheet of paper (30). When folded, envelope present the third of its original size; involving that hollowed tabs form unique hollowed tab (18) allowing removal of folded sheet. An Independent claim is also included for the envelope of commercial format used during folding system.