Browse Prior Art Database

Xerographic Developer

IP.com Disclosure Number: IPCOM000049664D
Original Publication Date: 1982-Jul-01
Included in the Prior Art Database: 2005-Feb-09
Document File: 2 page(s) / 74K

Publishing Venue

IBM

Related People

Knepper, JA: AUTHOR [+3]

Abstract

The two-component developer mix of a magnetic brush developer is simultaneously mixed and transported by a number of interleaving paddle-like mixers.

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Xerographic Developer

The two-component developer mix of a magnetic brush developer is simultaneously mixed and transported by a number of interleaving paddle-like mixers.

Fig. 1 shows a magnetic brush developer wherein the paddle-like mixers 10 and 11 of Fig. 3 operate to mix the toner/carrier developer mix as it is transported to a conveyor roll for subsequent transport to a magnetic brush development roll.

Fig. 2 shows a different magnetic brush developer wherein the paddle-like mixers 10 and 11 of Fig. 3, minus the wide terminating portion 19, mix the toner/carrier developer mix as the mix is transported directly to the magnetic brush development roll.

As seen in Fig. 3, mixers 10 and 11 are coupled together by gears 12 and 13 which are located external to the developer housing, as shown in Fig. 1. A drive gear (not shown) engages one of the gears 12, 13 in order to produce the rotation shown by arrows in Fig. 1. A pair of bearing support blocks 14 and 15 closes openings which are formed in opposite side walls of the developer, and each bearing block rotatably supports metal mixer shafts 16 and 17.

Each mixer comprises a four-paddle assembly. Each individual paddle is made up of a sheet of metal which is stamped to provide a number of extending arms 18, each of which terminates in a wide paddle 19. The gap provided by the adjacent surfaces of arms 18 is larger than the axial width of a paddle 19. Therefore, as the mixers rotate, paddles 19 interleave within t...