PAPER FEED DEVICE AND IMAGE FORMING APPARATUS

摘要

A paper feed device includes a plurality of paper feed sections and a selection control section. Selection periods include a specific selection period during which at least two selection signals among a plurality of selection signals are not at a normal level. Non-selection periods include a first normal period, a second normal period, a preceding non-selection period, and a succeeding non-selection period. The preceding non-selection period is between the first normal period and the specific selection period. A specific selection signal among the at least two selection signals is switched from the normal level to a selection level during the preceding non-selection period. The succeeding non-selection period is between the specific selection period and the second normal period. The specific selection signal is switched from the selection level to the normal level during the succeeding non-selection period.

主权项

1. A paper feed device comprising:
a plurality of paper feed sections each including a paper feed control section; and a selection control section configured to output a plurality of selection signals to each of the plurality of paper feed sections for selecting a paper feed section from among the plurality of paper feed sections, wherein each of the paper feed control sections is configured to commence communication with the selection control section based on the plurality of selection signals, each of the plurality of selection signals is switchable between a normal level and a selection level, the plurality of selection signals are set such as to select a paper feed section from among the plurality of paper feed sections during selection periods and to not select any of the paper feed sections during non-selection periods, the selection periods include a specific selection period during which at least two selection signals among the plurality of selection signals are at the selection level, and the non-selection periods include:
a first normal period during which each of the plurality of selection signals is at the normal level;a second normal period during which each of the plurality of selection signals is at the normal level;a preceding non-selection period between the first normal period and the specific selection period and during which a specific selection signal among the at least two selection signals is switched from the normal level to the selection level; anda succeeding non-selection period between the specific selection period and the second normal period and during which the specific selection signal is switched from the selection level to the normal level.