Label envelope with backing sheet

Claim 1

A self-adhesive label which is carried on a backing of release material, the label comprising: an envelope formed from a single folded sheet, the sheet being divided into a row of three rectilinear panels including a middle and two outer panels, said middle panel having at one longitudinal edge thereof a lower panel and at the other longitudinal edge thereof an upper panel which is separated from said middle panel by a line of perforations, the envelope being formed by folding said two outer panels of said row and said lower panel over the rear face of said middle panel, a front face of the envelope comprising said middle panel and said upper panel and a rear face of the envelope comprising the rearwardly exposed surface portions of the folded over outer panels and lower panel and the rearwardly facing surface of the upper panel; a paper article which is contained within the folded envelope; and a self-adhesive support layer which is carried on the backing of release material, the support layer having a self-adhesive rear face which is adhered to the backing of release material and having a front face, said rear face of the envelope being adhered to the front face of said support layer thereby to close the envelope, whereby the envelope so closed can be opened by tearing along the line of perforations.