Abstract: An envelope is provided, formed from a single sheet of paper material, which is substantially rectangular in configuration permitting processing on automatic equipment. The envelope is adapted for use with generally circular charts and includes a rectangular locking flap which in cooperation with the dimensions of the envelope minimizes the chance of slippage and damage to the charts.

Abstract: A dual pocket, easy opening envelope has a first envelope pocket defined by a front panel and an overlying rear panel secured by inwardly folded side flaps at the edges of the front panel. A separate panel is secured to the inside surface of the front panel to form a second envelope pocket. The front panel includes a generally-rectangular removeable access panel defined by perforations. A pull tab is formed on one edge of the removeable panel to enable a recipient to easily remove the access panel from the face of the envelope to get to the contents of the second envelope pocket.