Browse Prior Art Database

LOW COST PADDLE WHEEL

IP.com Disclosure Number: IPCOM000026569D
Original Publication Date: 1992-Oct-31
Included in the Prior Art Database: 2004-Apr-06
Document File: 4 page(s) / 152K

Publishing Venue

Xerox Disclosure Journal

Abstract

In a xerographic system wherein a two-component development medium, comprising carrier particles and electroscopic toner particles electrostatically attracted to the carrier particles, there is a need to mix said particles together. One such method is the use of a cylindrical mechanical paddle wheel consisting of a finned extrusion containing machined slots, two end caps, and a through shaft.

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Page 1 of 4

XEROX DISCLOSURE JOURNAL

LOW COST PADDLE WHEEL

Proposed Classification Frederick A. Green U.S. C1.355/254

Int. C1. G03g 15/06

14

XEROX DISCLOSURE JOURNAL - Vo1.17 No. 5 September/October 1992 347

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LOW COST PADDLE WHEEL(Cont'd)

In a xerographic system wherein a two-component development medium, comprising carrier particles and electroscopic toner particles electrostatically attracted to the carrier particles, there is a need to mix said particles together. One such method is the use of a cylindrical mechanical paddle wheel consisting of a finned extrusion containing machined slots, two end caps, and a through shaft.

The present invention discloses a very cost effective construction for a paddle wheel made from sheet metal and wire form parts. The accompanying Figure illustrates the present invention. The paddle wheel, generally referred to by reference numeral 10, is a hollow cylindrical core composed of a multiplicity of sheet metal angles 12 extending radially inward from the exterior of the core. Also included on paddle wheel 10 are two discs 16 possessing a plurality of notches circumjacent, to the outer edge for mounting sheet metal angles 12,
and a centrally located rectangular opening 20 to engage rod 14. The sheet metal angles are secured to the disc by wire forms 18 which are circumflexed around the body of the cylindrical form.

The advantages of the present invention are the enablement of assembly for manufacturability and automatically providing for proper bucket orientation.

References:

U.S. Patent No. 4,565,435 to Hart, assigned to Xerox Corporation, discloses an electrostatic copying machine in which a developing system includes a rotatable addle wheel. The rotation of the paddle wheel facilitates the clearing o P residual developer from a sump of the developing system.

US. Patent No. 4,583,112 to Morano et al., assigned to Xerox Corporation, discloses a developer housing in which a paddle wheel rotates through developer,...