| 摘要 |
A mailer form comprising an envelope having a front and back sheet secured together along marginal edges thereof. The front sheet has a window area. A self-reproducing surface is provided in the envelope and faces the window area whereby a printer having a non-carbonizing ribbon can print over the envelope front sheet to reproduce on the self-reproducing surface information which is visible in the window area and not visible in other areas of the envelope. |
