Browse Prior Art Database

DOCUMENT RESTACK PNEUMATIC CONTROL

IP.com Disclosure Number: IPCOM000024804D
Original Publication Date: 1982-Apr-30
Included in the Prior Art Database: 2004-Apr-04
Document File: 2 page(s) / 113K

Publishing Venue

Xerox Disclosure Journal

Abstract

In high speed "racetrack" recirculating document handlers, as shown in Figure 1, a problem exists in restacking the documents 2 into the document tray 3. The document can leave the restacking corrugating rolls 4 and settle on top of the document stack in the tray 3 in an uncontrolled floating state. Lightweight documents, e.g., 9 pound paper, have a tendency to 'lflutter'' and float and take various lengths of time to settle into the load tray 3, especially larger sheet sizes such as Japanese B4. Heavier documents have a tendency to overshoot the tray front wall 5 or bounce backward and to restack in a skewed state.

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XEROX DISCLOSURE JOURNAL

DOCUMENT RESTACK PNEUMATIC CONTROL
Albert E. Andrews

Proposed Classification US. C1. 271/211
Int. C1. B65h 31/00

Volume 7 Number 2 March/April 1982 73

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DOCUMENT RESTACK PNEUMATIC CONTROL (Cont'd)

In high speed "racetrack" recirculating document handlers, as shown in Figure 1, a problem exists in restacking the documents 2 into the document tray 3. The document can leave the restacking corrugating rolls 4 and settle on top of the document stack in the tray 3 in an uncontrolled floating state. Lightweight documents, e.g., 9 pound paper, have a tendency to 'lflutter'' and float and take various lengths of time to settle into the load tray 3, especially larger sheet sizes such as Japanese B4. Heavier documents have a tendency to overshoot the tray front wall 5 or bounce backward and to restack in a skewed state.

By varying the amount of sheet corrugation provided by the plural restack rolls 4, with variations in paper weight, some of these problems can be resolved. However, the disclosed system eliminates the problem and allows control of each document during restack without adjustment and regardless of most variations in weight and sheet size.

A flat plate 6, shown particularly in Figure 2, measuring approximately the overall length and width of the load tray 3 is mounted in the document restack path over the tray 3. It can be pivotally mounted to pivot away for loading or unloading documents, Here the flat plate 6 is spaced above the top of the stack in the load tray, held above the restack rolls 4 at one end and pivotally secured on the top of the tray front wall 5 at the other end. On the underside of the flat plate 6 are projecting strips 7 about 1/4" x 3/8" running the length of the plate in the document movement direction (see Figure 2). Also mounted on the underside of the plate 6, facing one e...