Variable size envelope drop stacker having means for assuring envelope sealing

An improved envelope stacking apparatus for receiving envelopes ejected from a mail processing apparatus in a seriatim manner to said stacking apparatus. said mail processing apparatus to eject said envelopes from a exist along an exist plane, said stacking apparatus having an entrance aligned to said mail processing apparatus exist, wherein the improvement comprises:

• said stacker having an elongated deck extending generally parallel to and vertically below said plane, and an elongated registration wall extending vertically from said deck and lateral to said exist;
• a bi-sectional deflector strip, having a first end pivotally mounted to the registration wall vertically elevated above said exist plane and locating a first section, a skew section translating said first section to a second section and producing a negative skew of said second section relative to said exist plane;
• said deflector located for encountering said envelope's leading edge ejected upon ejection of said envelope from said apparatus along said plane, said encounter of said envelope with said second section of said deflector strip to cause a resulting load on said envelope and thereby negatively skewing the trajectory of said envelope to cause said envelope to be registered against said registration wall;
• said skew section being set at a negative 5.degree. to 15.degree. skew;
• said deflector strip having a weight between 1.5 ounces and 3.0 ounces, and;
• said exist plane is set at a angle of between 90.degree. to 110.degree. relative to said registration wall, said registration wall be set at an angle of between 90.degree. and 95.degree. relative to said deck and said deck be set at an angle of 5.degree. relative to the horizontal.