Perforation device for punching sheet at predetermined positions and image forming apparatus incorporating the perforation device
US6325585A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 22, 1999 |
| Grant date | Dec 4, 2001 |
| Priority date | — |
| Expiry date | Feb 22, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/00818
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A sheet perforation device for use in an image forming apparatus eliminates inconveniences such as imperfect punching due to too small a sheet size and completion of image formation without notifying the user that the punching could not be performed despite the user's instruction for punching. Punching setup is made and a starting instruction is given through an operating section. Based on the relationship between a selected sheet size and the spacing of holes to be formed by a punching unit, a determination is made as to whether the punching can be correctly performed, and, if it has been determined that the correct punching will fail, a warning message is displayed on the operating section. If the user gives a starting instruction again after recognizing the warning message, image forming operation is started while the punching setup is automatically canceled.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.