The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 28, 1986
Filed:
Apr. 02, 1985
Wilfred H Gendron, Wilbraham, MA (US);
Westvaco Corporation, New York, NY (US);
Abstract
A tamper detection envelope is disclosed wherein the closure flap of the envelope is applied with a pattern of spaced slits to produce a weakened structure that will break during tampering and be obvious under visual observation. The spaced slits are separated by normally unbroken connectors and are arranged in generally parallel lines that criss cross one another at substantially right angles to produce subpanels of a generally diamond configuration within the closure flap. A strip of adhesive is applied between the closure flap and the envelope rear panel at least in the region of the subpanels for closing the envelope. Any subsequent attempt to open the envelope by lifting the closure flap will break the normally unbroken connections between the slits to provide a visual indication that the envelope has been tampered with.