Printing apparatus with a plurality of paper feeding units and controls of same
US6259468A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 25, 1997 |
| Grant date | Jul 10, 2001 |
| Priority date | — |
| Expiry date | Mar 25, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/6508
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In the case where since there is no recording paper in an upper stage cassette in which recording papers of an optimum size (for example, A4 size) should be enclosed, a lower stage cassette in which recording papers of another size are enclosed is used as a temporary paper feeding unit and a paper feed is performed, whether there is a status change such as supply of recording papers, removal of output papers from a paper ejecting unit, or the like or not is discriminated on the basis of a status change signal, whether the recording papers of the A4 size have been supplied to the upper stage cassette or not is discriminated, and whether an automatic paper feeding mode has been set or not is discriminated. Thus, when the recording papers of the A4 size are supplied to the upper stage cassette and the automatic paper feeding mode has been set, the paper feeding unit is switched from the lower stage cassette to the upper stage cassette.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.