Browse Prior Art Database

Lift Cams for a Pinwheel Paper Feeder

IP.com Disclosure Number: IPCOM000040577D
Original Publication Date: 1987-Dec-01
Included in the Prior Art Database: 2005-Feb-02
Document File: 2 page(s) / 31K

Publishing Venue

IBM

Related People

Williams, SS: AUTHOR

Abstract

When paper is fed by a pinwheel feeder between a tensioning shaft and a reverse drive roll, which is driven to reverse index the paper, the tensioning shaft is lifted away from the reverse drive roll during feeding by lift cams at opposite ends of the reverse drive roll, which is not driven during feeding. This provides a small clearance to allow the paper to shift side to side and align itself when being fed by the pinwheel feeder. When a sheet of paper 1 is fed by pinwheel feeders, any walking of the paper 1 from side to side causes one side or the other of the paper 1 to jam into one of a pair of guides 2 (one shown) on the pinwheel housing to increase the loading on the holes in the paper 1 for the pinwheels until the paper 1 becomes skewed and tears out of the pinwheels.

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Lift Cams for a Pinwheel Paper Feeder

When paper is fed by a pinwheel feeder between a tensioning shaft and a reverse drive roll, which is driven to reverse index the paper, the tensioning shaft is lifted away from the reverse drive roll during feeding by lift cams at opposite ends of the reverse drive roll, which is not driven during feeding. This provides a small clearance to allow the paper to shift side to side and align itself when being fed by the pinwheel feeder. When a sheet of paper 1 is fed by pinwheel feeders, any walking of the paper 1 from side to side causes one side or the other of the paper 1 to jam into one of a pair of guides 2 (one shown) on the pinwheel housing to increase the loading on the holes in the paper 1 for the pinwheels until the paper 1 becomes skewed and tears out of the pinwheels. The paper 1 is fed in a forward direction by pinwheel feeders. When the paper 1 passes between a tensioning shaft 3 and a reverse drive roll 4, which is not driven during feeding, the first perforation on the sheet of paper 1 causes a slight separation of the tensioning shaft 3 from the reverse drive roll 4. Each of the tensioning shaft 3 and the reverse drive roll 4 is supported in guide plates (one shown at 5) on opposite sides of the typewriter or printer. The reverse drive roll 4 has its ends 6 reduced for disposition within the side plates 5 as does the tensioning shaft 3. When the first perforation of the sheet of paper 1 passes between the tension...