Browse Prior Art Database

TONER BRIDGING PREVENTION DEVICE

IP.com Disclosure Number: IPCOM000025182D
Original Publication Date: 1983-Dec-31
Included in the Prior Art Database: 2004-Apr-04
Document File: 2 page(s) / 83K

Publishing Venue

Xerox Disclosure Journal

Abstract

In electrostatographic reproducing machines using dry toner dispensers, difficulty is sometimes experienced with regard to the toner powder bridging across portions of the toner dispenser, thereby preventing it from falling into the dispenser to be uniformly dispensed. Various means have been used in the prior art to solve this problem including bumpers, wobble plates, stepper motors, etc. For compact electrostatographic devices it is desirable to have a device which does not introduce vibrations into the machine system, does not require large amounts of power or torque requirements to drive it and is low in cost. The figure illustrates a solution that can be used with a toner dispenser 14 which includes an auger conveyor 10 and a protrusion 12 revolving inside the toner cassette affixed to the toner/auger which is springy and can be compressed and periodically released in a somewhat snapping fashion. The sudden short term releases of energy into the toner that has been bridged gets transmitted to the powder and breaks any bridges that are formed in the dispenser. Since the toner is a loosely packed powder it does not offer much resistance to the protrusion so minimal torque is required to rotate the member. The toner auger rotates the strip of plastic material 12, gets bent, winds around itself and when the revolution is complete, is released into the

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KEROX DISCLOSURE JOURNAL

TONER BRIDGING PREVENTION DEVICE Oscar G. Hauser
Lawrence M. Hart

Proposed Classification
U.S. C1. 355/3DD Int. Cl. G03g 15/0Q

/4

In electrostatographic reproducing machines using dry toner dispensers, difficulty is sometimes experienced with regard to the toner powder bridging across portions of the toner dispenser, thereby preventing it from falling into the dispenser to be uniformly dispensed. Various means have been used in the prior art to solve this problem including bumpers, wobble plates, stepper motors, etc. For compact electrostatographic devices it is desirable to have a device which does not introduce vibrations into the machine system, does not require large amounts of power or torque requirements to drive it and is low in cost. The figure illustrates a solution that can be used with a toner dispenser 14 which includes an auger conveyor 10 and a protrusion 12 revolving inside the toner cassette affixed to the toner/auger which is springy and can be compressed and periodically released in a somewhat snapping fashion. The sudden short term releases of energy into the toner that has been bridged gets transmitted to the powder and breaks any bridges that are formed in the dispenser. Since the toner is a loosely packed powder it does not offer much resistance to the protrusion so minimal torque is required to rotate the member. The toner auger rotates the strip of plastic material 12, gets bent, winds around itself and when the re...