Sealed envelope, pocket, sheath/cover fabricating, dating and preserving method for e.g. protecting technical document, involves placing plastic film to cover flap and part of body, and arranging film and developer to receive protection

摘要

The method involves forming an envelope, pocket, sheath or cover (2) with an opening on its side (3) for introducing objects, where the envelope is made of paper, sheath and woven/non-woven fabric. A closure flap (4) is placed on the envelope`s body (4a), where the flap supports information design/writing impressions for better communication. A tear-proof plastic film (6) is placed to cover the flap and a part of the body, where the film integrates a complementary film with a chemical coating e.g. developer (7). The film and the developer are arranged to receive a siliconed protection (8).