Tamper-evident security envelopes

Details Tamper-evident security envelopes Tamper-evident security envelopes

1995-07-31

1998-03-17

Fidei, David T.

Special receptacle or package

With indicator

2064595, 206807, 229 681, 533742, 53411, 531314, 53562, 383 5, 156581, B65D 8500

Patent

active

057276862

ABSTRACT:
A tamper-evident envelope has a first layer of paper-containing material and a second layer of paper-containing material attached to each other along a number of seams. Each seam includes a pattern embossed and/or perforated through both layers along a major part of the seam. If the envelope is opened and resealed along one of these seams, the embossed or perforated pattern is corrupted, thereby making the unauthorized opening of the envelope readily apparent to an intended recipient.

REFERENCES:
patent: D162694 (1951-03-01), Salfisberg
patent: 2230849 (1941-02-01), Salfisberg
patent: 2325021 (1943-07-01), Salfisberg
patent: 2545243 (1951-03-01), Ramsey, Jr.
patent: 2685911 (1954-08-01), Haller
patent: 3043506 (1962-07-01), Bremer
patent: 3372797 (1968-03-01), Grevich
patent: 3745919 (1973-07-01), Wattenburg et al.
patent: 3899073 (1975-08-01), Barr
patent: 4860899 (1989-08-01), McKee
patent: 5060848 (1991-10-01), Ewan
patent: 5137304 (1992-08-01), Silverschotz et al.
patent: 5161687 (1992-11-01), Kornell et al.
patent: 5323908 (1994-06-01), Boettger

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