System for drive control of toner agitator in image-forming apparatus
US4977428A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 24, 1989 |
| Grant date | Dec 11, 1990 |
| Priority date | — |
| Expiry date | May 24, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/0822
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In an image-forming apparatus (1), such as an electro-graphic printer, in which an electro-static latent image formed on an photoconductive drum (5) is reproduced by a toner (15), having a pulse motor (M) for driving an agitator (13) built-in to a developer unit (8), the agitator (13) is controlled during an initialization process of the apparatus (1) by setting the rotational speed of the motor (M) at a lower level (P) upon a start-up thereof, and converting the same to a higher level (N) corresponding to the normal operational speed after a predetermined period (T1) has passed from the start-up, whereby a larger torque is generated from the motor (M) at the start-up stage of the initialization so that the agitator (13) can be smoothly rotated even if the toner (15) has solidified in the developer unit (8).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.