Paper basis weight sensing device and method, and image forming apparatus incorporating same
US9028058B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 11, 2014 |
| Grant date | May 12, 2015 |
| Priority date | — |
| Expiry date | Feb 11, 2034 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J11/009
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A sheet basis weight sensing device for an image forming apparatus includes a sensor to detect heat conductivity of an ambient gas on a surface of a sheet on which the droplet is deposited or the surface opposite the sheet before and after the droplet is deposited; and a controller configured to: measure a time it takes the heat conductivity after the droplet is deposited to change by a predetermined ratio compared to the heat conductivity before deposition of the droplet; and obtain the sheet basis weight based on a relation between the time and the basis weight. The sheet basis weight sensing device further includes a memory to store a first table and a second table, and an image forming condition controller to set an appropriate image forming condition with reference to the second table.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.