Browse Prior Art Database

Dual Auger Mixing System for Developers

IP.com Disclosure Number: IPCOM000075753D
Original Publication Date: 1971-Nov-01
Included in the Prior Art Database: 2005-Feb-24
Document File: 2 page(s) / 36K

Publishing Venue

IBM

Related People

Hoekzema, RJ: AUTHOR [+2]

Abstract

Fig. 1 shows a system which will develop copy images across the photo conductor surface.

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Dual Auger Mixing System for Developers

Fig. 1 shows a system which will develop copy images across the photo conductor surface.

Toner is dispensed from the cartridge 1 into the sump area 2.

In the sump area, the toner and carrier beads are thoroughly mixed by the augers 3 and 4. The augers are manufactured the same with regard to pitch, diameter and right and left-handed thread, as shown in Fig.
2. The augers 3 and 4 are driven to provide a flow of the mixed toner and carrier as shown by the arrows in Fig. 2. This flow translates toner rich beads from the edges to the center and also translates sufficiently toned beads from the center to the edges.

This flow allows excess toner to collect in the center and to be deposited in the center of the buckets 5 (Fig. 1) of the developer 6.

The center is the optimum position, because it is the center of the most often imaged area and consequently a high toner usage area. The toned beads are then deposited from the buckets 5 onto the rotating magnetic brush 7, which develops the latent image on the photoconductor belt 8. The unused toner and beads fall back into the sump, wherein they are mixed by the augers with newly deposited toner.

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