Photocopying – Contact printing – Light boxes
Patent
1990-03-12
1991-10-01
Moses, R. L.
Photocopying
Contact printing
Light boxes
355326, G03G 1506
Patent
active
050538209
ABSTRACT:
A drive system for positioning any one of a plurality of toner developing modules relative to a photoconductor drum of an electrographic printer includes an indexing assembly having a chain drive mechanism. The chain drive mechanism includes a motor driven tow bar that is configured to releasably engage a tow hook mounted to a movable toner cart. The toner cart includes a developer rack that supports the plurality of developing modules. The drive system further includes a lift assembly that is configured to engage any one of developing modules and move it away from the rack to a developing position adjacent the photoconductor drum and back to the developer rack. The lift assembly includes a pair of lift arms, each of which is defined by a four bar linkage. The lift arms include hook assemblies that are configured to engage lift pins mounted on opposite ends of the developing modules. Each hook assembly includes a first centering member that supports a movable spring biased second centering member. The opposite ends of the modules are configured to engage first gaping surfaces of a pair of gaping cams mounted adjacent to the photoconductor drum. This engagement establishes the vertical gap clearance needed between the drum and module for the developing process. The opposite ends of the modules are further configured to engage second gaping surfaces of the gaping cams to define the developing position of the developing modules.
REFERENCES:
patent: 4146324 (1979-03-01), Komori et al.
patent: 4640605 (1987-02-01), Ariyama et al.
patent: 4728983 (1988-03-01), Zwadlo et al.
patent: 4728987 (1988-03-01), Diola et al.
patent: 4754302 (1988-06-01), Komatsubara et al.
patent: 4796051 (1989-01-01), Monkelbaan et al.
patent: 4797703 (1989-01-01), Guslits
patent: 4800839 (1989-01-01), Ariyama et al.
patent: 4841329 (1989-06-01), Kasamura et al.
patent: 4841336 (1989-06-01), Kusumoto et al.
patent: 4891672 (1990-01-01), Takagi
patent: 4894684 (1990-01-01), Nakajima et al.
patent: 4937624 (1990-06-01), Kotani et al.
patent: 4937626 (1990-06-01), Kotani et al.
Efrem Lieber, "Making Sense Out of All Those Proofing Devices", Printing Impressions, 9/1988, pp. 33-34.
Jody M. Kenyon, "A Proof In Time", American Printer, 9/1988, pp. 31-34.
Jack Powers, "Desktop Color Separation:", Computer Pictures, Jul.-Sep./1988, pp. 27-28, 30-31.
Printing Impressions, "Here They Are: The 30 Largest Color Separators", 9/1988, pp. 22-25.
Minnesota Mining and Manufacturing Corporation, "Press Release-3 M Direct Digital Color Proofing Systems (DDCP) Described at IPEX", 7/1988, pp. 1-7.
Preszler Duane A.
Zwadlo Gregory L.
Hoffman Sandra L.
Minnesota & Mining Manufacturing Company
Moses R. L.
LandOfFree
Developing module drive system for an electrographic printer does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Developing module drive system for an electrographic printer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Developing module drive system for an electrographic printer will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1758582