Browse Prior Art Database

Paper Envelope Exit Path

IP.com Disclosure Number: IPCOM000086173D
Original Publication Date: 1976-Aug-01
Included in the Prior Art Database: 2005-Mar-03
Document File: 2 page(s) / 57K

Publishing Venue

IBM

Related People

Hunt, RE: AUTHOR [+2]

Abstract

For certain sheet transport applications, it is desirable to transport the sheets by clamping the sheet near one edge to prevent smearing of undried ink or unfused toner. One such device employed a driven O-ring with backup pads. A tracking problem was caused by the irregular pattern of path at the driven edge of the paper. The tracking problem resulted from areas of the paper passing over the back of pads, which pinched the paper between the O-ring belt and pads to cause a drive force to be imparted to the paper.

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Paper Envelope Exit Path

For certain sheet transport applications, it is desirable to transport the sheets by clamping the sheet near one edge to prevent smearing of undried ink or unfused toner. One such device employed a driven O-ring with backup pads. A tracking problem was caused by the irregular pattern of path at the driven edge of the paper. The tracking problem resulted from areas of the paper passing over the back of pads, which pinched the paper between the O-ring belt and pads to cause a drive force to be imparted to the paper.

After an area of the paper had passed over a pad, it would then be released which resulted in undesirable uneven drive being applied to the paper. The opposite edge or noncontrolled edge of the paper could not be made to conform to this pattern. Therefore, since the two sides of the paper were travelling at different rates of speed and along different paths, forces were set up in the paper itself which caused the sheet to pull itself out of the desired path.

This problem can be solved with a tubular type of path. The drive belt 1 travels through the path, normal load between the belt 1 and the paper is applied by a series of pinch rollers 3 acting against backup rollers 4, 5, 6, and wheel 2. Driving power is delivered through pulley 7. A wire rack 8, forming a bed the full width of the paper sheet is shaped to conform to the wheel radius. As the paper travels along a path indicated by arrows 9 it takes a cylindrical form. In thi...