Paper feeding apparatus
US7334787B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 24, 2003 |
| Grant date | Feb 26, 2008 |
| Priority date | — |
| Expiry date | Feb 28, 2026 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65H2513/11
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
When the sheets are taken out sheet by sheet and started to be fed, in a first predetermined section, a driving mode is set to a fixed PWM driving mode, and a DC motor is driven in response to a PWM signal of a fixed duty to perform the sheet feed operation (S110, S120). When the tip end of the fed sheet is detected by a registration sensor (S140: YES), the sheet feed operation is once stopped (S150), and the driving mode is changed to a position feedback control mode (S170). Thereafter, the sheet is fed to a registration position by a position feedback control, the sheet reaches the registration position, the sheet feed is completed (S200: YES), and the process enters the next transfer operation. The transfer operation is also performed in the position feedback control mode. When a control method is changed before/after the registration sensor in this manner, the speeding-up and noise reduction of the sheet feed operation are realized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.