Browse Prior Art Database

POSITIVE DRIVE, PASSIVE, SHEET ROTATION DEVICE USING DIFFERENTIAL ROLL VELOCITIES

IP.com Disclosure Number: IPCOM000026551D
Original Publication Date: 1992-Oct-31
Included in the Prior Art Database: 2004-Apr-06
Document File: 4 page(s) / 191K

Publishing Venue

Xerox Disclosure Journal

Abstract

In order to perform standard letter folds using a buckle folder, sheets must be fed to the folder short edge first. Since the output from most copiers and electronic printers is long edge first, some type of sheet turning mechanism is necessary if folding is to be done in an on-line, straight-line system. If a right angle sheet transport system is used, everything is turned, and it is no longer possible to use the same folder to fold A3 or other size sheets that are often already oriented short edge first.

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Page 1 of 4

XEROX DISCLOSURE JOURNAL

POSITIVE DRIVE, PASSIVE, Proposed Classification SHEET ROTATION DEVICE USING
DIFFERENTIAL ROLL
VELOCITIES
Barry
P. Mandel

US. C1.271/225 Int. Cl. B65h 5/00

'I

11

XEROX DISCLOSURE JOURNAL - Vo1.17 No. 5 September/October 1992 289

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Page 2 of 4

POSITIVE DRIVE, PASSIVE, SHEET ROTATION DEVICE USING DIFFERENTIAL ROLL VELOCITIES(Cont'd)

FIG. 2 fl 51

FIG. 3

FIG. 4

290 XEROX DISCLOSURE JOURNAL - Vo1.17 No. 5 September/October 1992

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Page 3 of 4

POSITIVE DRIVE, PASSIVE, SHEET ROTATION DEVICE USING DIFFERENTIAL ROLL VELOCITIES(Cont'd)

In order to perform standard letter folds using a buckle folder, sheets must be fed to the folder short edge first. Since the output from most copiers and electronic printers is long edge first, some type of sheet turning mechanism is necessary if folding is to be done in an on-line, straight-line system. If a right angle sheet transport system is used, everything is turned, and it is no longer possible to use the same folder to fold A3 or other size sheets that are often already oriented short edge first.

Systems in the past have been able to rotate materials for different reasons by the use of costly, cumbersome and complicated mechanisms and devices. For example, U. S. Patent 4,155,440 discloses a document handling device for turning a document such as a letter substantially 90" in its own plane, utilizing a plurality of pairs of rollers driven at different speeds. In U. S. Patent 3,758,104 an apparatus for turning flat articles is shown comprising two wheeling disks, rotating at different speeds to turn the article. An apparatus for offset stacking two or more sets of sheets in U. S. Patent 4,188,025. The heretofore mentioned sheet transport systems and others of the like do not appear to be adaptable to the rotation of sheets in copiers in some instances and in most instances are bulky, complicated and costly.

Accordingly, a sheet rotator is disclosed in Figures 1 - 4 that is valuable for feeding into short edge feed finishers from long edge feed machines and includes a shaft with several turn rollers driven from it at different speeds. A sheet is rotated 90" and by the time rotation has been completed the sheet has been driven out of the turn rolls and is acquired by registration rolls.

With particular reference to Figures 1,and 2, a sheet 11 is conveyed long edge first within a printer apparatus and a under conventional side registration system such as, a ball-on-belt transport 15 that has freely rotatable balls 16 that rest on the drive belt structure due to gravity. The ball-on-belt transport 15 is positioned at an acute angle with respect to side registration edge 12 and due to sheet 11 being conveyed under the balls turning, it tends to direct the sheet toward registration edge 12. Once the sheet reaches th...