Browse Prior Art Database

Paper Supply Duplex Bin

IP.com Disclosure Number: IPCOM000086620D
Original Publication Date: 1976-Oct-01
Included in the Prior Art Database: 2005-Mar-03
Document File: 2 page(s) / 41K

Publishing Venue

IBM

Related People

Kollar, EP: AUTHOR [+2]

Abstract

The paper supply/duplex bin 10 serves as a paper supply tray for a copier and also as a duplex bin for the copier during duplex runs. During sheet feeding, picker roller 12 is in the lower position and drives the top sheet in bin 10 to the separator-restraint rollers 14. During the loading of duplex sheets (having a copy on one side) into bin 10, picker roller 12 is retracted to position 18, and inertia roller 16 assists in paper alignment by preventing paper bounce.

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Paper Supply Duplex Bin

The paper supply/duplex bin 10 serves as a paper supply tray for a copier and also as a duplex bin for the copier during duplex runs. During sheet feeding, picker roller 12 is in the lower position and drives the top sheet in bin 10 to the separator-restraint rollers 14. During the loading of duplex sheets (having a copy on one side) into bin 10, picker roller 12 is retracted to position 18, and inertia roller 16 assists in paper alignment by preventing paper bounce.

As successive sheets are picked from bin 10, there is a different exit angle between each sheet and the separator-restraint rollers 14. For jam-free operation there is only a reasonable variation of this exit angle; the variation corresponds to a stack height of approximately 100 sheets. To accommodate a larger variation, an automated elevator control is provided. It consists of the scissors-type elevator mechanism 20 driven by motor 24, controlled by control logic 26 which receives input signals from paper-up switch 28 and paperdown switch 30.

When paper sheets are being loaded into bin 10, paper-down switch 30 monitors the level of the paper. During paper-in time, the control logic 26 waits for the paper-down switch to close its contacts. When paper-down switch 30 closes, control logic 26 drives motor 24, moving the paper stack downward until the paper-down switch opens. The bin 10 stays in the lower position until enough additional paper is fed in to close switch 30 again....