Browse Prior Art Database

Envelope Stacker Module Disclosure Number: IPCOM000083102D
Original Publication Date: 1975-Apr-01
Included in the Prior Art Database: 2005-Feb-28
Document File: 3 page(s) / 63K

Publishing Venue


Related People

Church, WE: AUTHOR [+2]


A removable envelope stacker which will reliably stack and hold various sizes of envelopes is shown.

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Envelope Stacker Module

A removable envelope stacker which will reliably stack and hold various sizes of envelopes is shown.

Restraint 1 is assembled in stacker cover 2 by four levers 3, 4, 5 and 6. In the position shown, it will stack envelope sizes nine and ten. To stack smaller sizes the operator opens the stacker 7 and flips the restraint 1 overcenter to the right. The action of the overcenter spring 8 will pull the restraint positively against stop surface 9, thus eliminating need for operator judgement. To return to larger sizes, the notion is reversed.

Levers 3 and 4 are connected by set screws to shaft 10. Levers 3 and 4 are connected by link 11. This connection ties levers 3 and 4 to levers 5 and 6, such that the restraint 1 moves smoothly from left to right and remains perpendicular to front surface 14 at all times. Pins 12 molded in all levers are the means of suspending the restraint 1.

The angle plate 13 which enters slot 13a when the stacker 7 is in the stacker cover 2, is spring loaded in the position shown. As an envelope floats downward after being fed along the path indicated by arrow 26, it's air mattress becomes compacted as it nears the stack. If the stack is flat, the envelopes will stack at random. The angle plate 13, however, tilts the air mattress and the envelopes slide forward and stack neatly against stacker surface 14. Being spring loaded, the angle plate 13 will retract as the stacker 7 fills so as not to restrict hopper capacity.

Also, should the stacker 7 be opened then closed during machine operation, the envelope stack will resume its original orientation, and not present a load against closing the stack...