Browse Prior Art Database

Copier Erase Function

IP.com Disclosure Number: IPCOM000086836D
Original Publication Date: 1976-Nov-01
Included in the Prior Art Database: 2005-Mar-03
Document File: 2 page(s) / 63K

Publishing Venue

IBM

Related People

Hubbard, JH: AUTHOR [+4]

Abstract

The xerographic copier (Fig. 1) is capable of feeding single sheets of plain paper to the copier's transfer station 12 from the selected one of two paper storage bins 10 or 11. The size of the paper sheet determines the size of the working area of drum photoconductor 13. The portion of the photoconductor surrounding this working area must be erased or discharged by interimage and erase lamps 14, prior to entering developer 15.

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Copier Erase Function

The xerographic copier (Fig. 1) is capable of feeding single sheets of plain paper to the copier's transfer station 12 from the selected one of two paper storage bins 10 or 11. The size of the paper sheet determines the size of the working area of drum photoconductor 13. The portion of the photoconductor surrounding this working area must be erased or discharged by interimage and erase lamps 14, prior to entering developer 15.

The photoconductor and its working and surrounding areas are represented in Fig. 2, drum 13 being unrolled. For large paper, the photoconductor working area is within the boundary A C F G. For small paper the working area is B C D E, and for intermediate-size paper the working area is B C F H. In all cases the area surrounding the working area must be erased before the photoconductor enters developer 15.

The size of the paper in a bin is indicated by manual actuation of one of the three switches 16. In addition, the selected bin is indicated by actuation of a switch (not shown) on the copier's control panel 17. As paper is supplied to the copier's transfer station, each sheet passes through paper-size sensing station
18. This station operates to provide one of three possible output signals (Fig. 3) in accordance with the three sizes of paper depicted in Fig. 2.

Referring to Fig. 3, information on the selected bin and on the size of the paper in that bin, is interrogated by logic network 20. Then, logic network 21 is co...