Browse Prior Art Database

Expandable Mail Stacker

IP.com Disclosure Number: IPCOM000079859D
Original Publication Date: 1973-Sep-01
Included in the Prior Art Database: 2005-Feb-26
Document File: 2 page(s) / 51K

Publishing Venue

IBM

Related People

Brancke, JS: AUTHOR [+2]

Abstract

An expandable mail stacker is described which moves the mail stack continuously toward the operator following a sorting operation.

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Expandable Mail Stacker

An expandable mail stacker is described which moves the mail stack continuously toward the operator following a sorting operation.

Fig. 1 shows mail pieces entering the extended length stacker. The width of the stacker is sufficient to accommodate most standard size first-class letters. The stacker comprises the drive sprockets 1 turning synchronously with the entering mail, such that each mail piece enters an individual cell formed by the vane assembly 3 carried by the chains 2, driven by the drive sprockets 1.

The vane assembly 3 shown in Fig. 2 comprises a stationary rod 9 which is attached to the chain 2, not shown. Rotatably mounted on the rod 9 is a cylindrical tube 10, which is driven by the vane sprocket 8 and rewound by the spring 13. Spring 13 is attached on one end to the rod 9 and on the other end to the tube 10. The vane 4 is shown in Fig. 2 fully extended, being held in place by the guide 5 and tab 11. Stop 12 prevents the vane 4 from fully retracting around tube 10 when the vane is in its retracted position.

As the vane assembly 3 travels around the left drive sprocket 1, gear rack 6 engages the vane sprockets 8, extending the vane 4 so as to create individual cells that transport individual letters to the stack 7. After extension by the gear rack 6, the vanes 4 are locked in place by the guide 5 engaging tab 11. As the cells deliver the mail piece to the stack 7, the longitudinal force from the stack unlatches the vane 4 fr...