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COPY ROTATOR/INVERTER

IP.com Disclosure Number: IPCOM000025337D
Original Publication Date: 1984-Oct-31
Included in the Prior Art Database: 2004-Apr-04
Document File: 2 page(s) / 79K

Publishing Venue

Xerox Disclosure Journal

Abstract

When duplex copies are made in an electrophotographic printing machine utilizing short edge feed, turning of the paper to copy on the back side thereof rotates the image 180' from the image on the opposed side. This problem causes complicated document handlers or optics which increase the cost of the printing machine. A proposed solution has been to feed the long edge through the printing machine to avoid the problem. This, however, increases machine cost inasmuch as the components required to feed wide copy sheets are expensive. A simple, inexpen-sive copy sheet rotator and inverter is shown in the drawing. As depicted thereat, the copy sheet is advanced by feed rollers 10 against registration stops located adjacent edge 12. Feed rolls 10 are undamped freeing the copy sheet and rotator mechanism 14 is actuated. Rotator mechanism 14 includes a selenoid actuated clamping pad 16 which is driven by a motor 18 through belt 20. After the copy sheet is positioned against the registration stops, the selenoid is actuated to move pad 16 downwardly securing the copy sheet. The registration gates now move downwardly away from the copy sheet path and motor 18 rotates clamping pad 16 to rotate the copy sheet 180'. The output drive rollers located below input drive rollers 10 are now actuated with clamping pad 16 being de-actuated to free the copy sheet. Thus, the copy sheet has been rotated and inverted. Alternatively, if it's desired to merely rotate the copy sheet after clamping pad 16 is de-energized

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~ XEROX DISCLOSURE JOURNAL

COPY ROTATOR/INVERTER
Proposed R.E. Shaeffer Classification

U.S. Cl. 355/3 Int. Cl. G03g 15/00

When duplex copies are made in an electrophotographic printing machine utilizing short edge feed, turning of the paper to copy on the back side thereof rotates the image 180' from the image on the opposed side. This problem causes complicated document handlers or optics which increase the cost of the printing machine. A proposed solution has been to feed the long edge through the printing machine to avoid the problem. This, however, increases machine cost inasmuch as the components required to feed wide copy sheets are expensive. A simple, inexpen- sive copy sheet rotator and inverter is shown in the drawing. As depicted thereat, the copy sheet is advanced by feed rollers 10 against registration stops located adjacent edge 12. Feed rolls 10 are undamped freeing the copy sheet and rotator mechanism 14 is actuated. Rotator mechanism 14 includes a selenoid actuated clamping pad 16 which is driven by a motor 18 through belt 20. After the copy sheet is positioned against the registration stops, the selenoid is actuated to move pad 16 downwardly securing the copy sheet. The registration gates now move downwardly away from the copy sheet path and motor 18 rotates clamping pad 16 to rotate the copy sheet 180'. The output drive rollers located below input drive rollers 10 are now actuated with clamping pad 16 being de-actuated to free the copy sheet. T...