Abstract: A method and system for detecting chemical or biological hazards in items is provided. An incoming mail mailbox includes a sampler to sample air from a letter that is tested using a first sensor and then placed in a receptacle having an environment that is tested using a second sensor.

Abstract: A stationery form including a single sheet of printable material that has a self-seal contact adhesive applied to edge regions arranged to contact each other when the form is folded about a crease line. Contacting edge regions are releasably adhered when a first pressure is applied to seal temporarily the form in a folded condition such that the form can be opened and re-sealed. The contacting edge regions are non-releasably adhered when a second pressure higher than the first pressure is applied to seal permanently the form in the folded condition. Low pressure sealing may be achieved manually, for example by finger pressure. High pressure sealing may be provided with a pressure sealing machine. A permanently sealed form can be opened by tearing along lines of weakness inboard of the adhesive to remove the bonded regions.

Abstract: A coin carrying plastic card of a size for carrying in a card carrying section of a wallet or the like including a plastic card body of a first thickness, a hole in the plastic card body for receiving a coin of a second thickness, an edge on the card surrounding the hole, the hole being of slightly larger than the corresponding dimension of the coin so that the edge on the card lies in contiguous relationship to the edge of the coin, the first thickness being of a sufficiently high proportion of the second thickness so that the edge of the card surrounding the hole will provide support to the edge of the coin, and pressure-sensitive tape affixed to one side of the card and extending across the hole for adhesively securing the coin to the card while permitting selective removal and replacement thereo

Abstract: A specialized and multifunctional envelope is provided for displaying an advertiser's message having a detachable reply card and which envelope may thereafter be utilized for receipt collection and ready storage and availability of coins. The envelope comprises a front face portion and a rear face portion which contains an advertiser's message and a detachable return reply card disposed therebeneath. The rear face is also provided with an upper tab secured to the message portion along a fold line. The front face is secured to the rear face along a bottom fold line so as to form a pocket therebetween and includes an upper portion having a reminder message thereon, while the lower portion is provided with a reusable type tacky adhesive layer for releasable securement of coins thereto and for securement of the entire envelope to a support surface; said adhesive layer initially being covered by a releasable cover sheet.