Browse Prior Art Database

Three Position Gating Nip Roller Assembly

IP.com Disclosure Number: IPCOM000050627D
Original Publication Date: 1982-Nov-01
Included in the Prior Art Database: 2005-Feb-10
Document File: 3 page(s) / 47K

Publishing Venue

IBM

Related People

Colglazer, DF: AUTHOR [+2]

Abstract

This article describes a sheet-handling apparatus which functions as a sheet-feeding device, a page-flipping device and a duplex loop return device. The apparatus comprises a pair of feed rollers 10 and 12 disposed in spaced relationship and driven by a reversible DC motor (not shown) to feed a sheet therebetween. Another reversible DC motor (not shown) is coupled to the rollers and functions to shift the rollers to three distinct positions, 1, 2 and 3. The positions are identified in Figs. 1, 2A, 2B and 2C.

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Three Position Gating Nip Roller Assembly

This article describes a sheet-handling apparatus which functions as a sheet-feeding device, a page-flipping device and a duplex loop return device. The apparatus comprises a pair of feed rollers 10 and 12 disposed in spaced relationship and driven by a reversible DC motor (not shown) to feed a sheet therebetween. Another reversible DC motor (not shown) is coupled to the rollers and functions to shift the rollers to three distinct positions, 1, 2 and 3. The positions are identified in Figs. 1, 2A, 2B and 2C.

Fig. 1 shows a copying system configuration wherein the apparatus 14 is disposed to accept paper (sheet) from a copier (not shown). The sheet is fed into a duplex tray for duplex copying or back into the copier for side-two copying or into a finisher paper path. If the sheet is fed into the finisher's path, it is flipped before feeding. The motor (not shown) drives the feed rollers (10 and 12) in start, stop and reverse directions. The motor controller utilizes timing signals generated from the sensor 22. The sensor senses the presence of paper in the path. In all cases, the nip rollers 16 and 18 are in the low position feeding sheets into the duplex tray area of the copier system. Direction of sheet feed is identified by arrows 24 and 26, respectively. All incoming sheets are fed into the rollers 10 and 12 when the rollers are in the "1" position. The sheet-handling apparatus 14 operates in three distinct modes of operation.

In the first mode of operation, sheets are fed and stacked in the duplex tray. The rollers 10 and 12 receive each sheet in position 1. When it comes time to expel the trailing end of the sheet, the rollers shift to position 3. This ensures the clearing of the sheet from the gate rollers 10 and 12. The sheet-handling apparatus then returns to position 1 for the next sheet. This cycle repeats until all the sheets are stacked in the duplex tray. For side-two copying, the sheets are shing...