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This xerographic copier is arranged to produce marks or indicia, directly on the copier's output copy paper, indicating the need to resupply the copier's photoconductor.
English (United States)
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End of Photoconductor Indication
This xerographic copier is arranged to produce marks or indicia, directly on
the copier's output copy paper, indicating the need to resupply the copier's
The copier of Fig. 1 includes a photoconductor drum 10, more completely
shown in Fig. 2.
Drum 10 includes two working-areas or panels 11 and 12 of photoconductor.
After these two working panels have been used a given number of times, for
example, to make 30,000 copies, a mechanism (not shown automatically
advances fresh photoconductor panels from supply reels 13 and 14, as the used
photoconductor panels are reeled onto take-up reels 15 and 16.
When the supply reels 13 and 14 become exhausted, a unique last
photoconductor panel of each supply reel is positioned at working areas 11 and 12. This unique panel contains a distinctive indicia, mark, or wording, such as
"CHANGE PC". This marking is placed on the photoconductor during initial
manufacture of each supply reel. This marking does not prevent charging of the
underlying photoconductor, as at charge station 17 (Fig. 1). However, this
marking does prevent subsequent discharge of this portion of the photoconductor
at original document imaging station 18. Thus, when the photoconductor's
working panel subsequently passes through the copier's developer station 19,
this unique marking receives toner, and appears as an overlay on the image of
the original document 20. As a result, the copies which appear in the copier's...