PROCESS COLOR TONER RECLAIM FOR TANDEM ENGINE
Original Publication Date: 1995-Feb-28
Included in the Prior Art Database: 2004-Apr-07
Xerox Disclosure Journal
Black +Color reclaim ON if: percent reclaim in Developer C limit AND,Color reclaim ON if: toner at Black sensor AND, Color reclaim ON if: toner at all Color sensors Dispenser On Signal XEROX DISCLOSURE JOURNAL - Vol. 20, No. 1 January/February 1995 61
XEROX DISCLOSURE JOURNAL
PROCESS COLOR TONER Proposed Classification RECLAIM FOR TANDEM ENGINE
Int. C1. G03g 21/00
Dispenser On Signal
XEROX DISCLOSURE JOURNAL - Vol. 20, No. 1 January/February 1995 61
Level Toner Controller Drive Auaer 1111 I I I Sensor Si g n a Is
Black +Color reclaim ON if: percent reclaim in Developer C limit AND,Color reclaim ON if: toner at Black sensor
AND, Color reclaim ON if: toner at all Color sensors
PROCESS COLOR TONER RECLAIM FOR TANDEM ENGINE(Cont'd)
Color toners can be reclaimed as a process black toner by combining the color toners in a black developer housing, if color contamination does not allow direct reuse as color toners. A metering system is described which returns color toners to the black developer housing in the correct proportions to create a process black toner which does not affect black copy quality. The metering system can also be used to monitor and limit the percentage of reclaimed toner relative to virgin toner which is present in the black developer housing. This system allows the use of smaller waste bottles, lower service cost, and enables marketing of color toner reclaim without CQ (copy quality) degradation.
A process color copier will have higher toner throughput rate than black only or black and white copies. The higher toner throughput is due to higher area coverage documents run on these machines. A typical black copier would have a toner throughput of about 10 mg per copy, while a process color copier would have a toner throughput of about 50 mg per copier through the cleaner. Using a 15,000 cc size waste toner bottle, it has been calculated that the waste bottle replacement frequencies range from 3 to 31 times per month, for 200K to 1500K AMPV (average monthly print volumes) products. This can present a serious space and/or service problem for copier machines.
Various solutions to this problem have been devised, such as the use of toner reclaim to reduce the size of any waste toner bottle which may be needed. Also, it has been suggested that reclaiming color toners into the black developer for reuse may be a possible solution, however, this is not as desirable as reclaiming the color toners into the color developer housings. However, it may be necessary if the reclaimed toner is too heavily contaminated to provide good color copy quality. The value in reclaiming the color toner at all is the much higher cost of color toner than black toner. Reclaim of the toner is a significant cost benefit to customers.
The present invention provides a method to control the proportions of reclaimed color toner being used in the black developer housing. In effect, which is being done is the creation of a reclaim process black toner. This process is shown in the Figure. Each color cleaner augers its cleaned toner to a collection ho per. At the bottom of each hopper is a toner level senso...