Paper-supplying device

A paper supplying device comprising:

• a body;
• a paper supplying deck insertable into and withdrawable from a paper supplying portion of said body and having a paper carrying portion with a paper width setting mechanism and a variable resistor a resistance value of which changes in an interlocked relation with said paper width setting mechanism to output a paper width detecting voltage in dependence on said resistance value;
• a drawer-type connector electrically connecting a side of said paper supplying deck with a side of said body when said deck is mounted in said body;
• a limit voltage avoiding resistance, which prevents said paper width detecting voltage from amounting to a ground voltage even though said resistance value of said variable resistor reaches a minimum value, connected in series with said variable resistor on said side of said deck;
• and
• a pull down resistance connected with said connector on said side of said body to discriminate voltages in said connector on said side of said body between a voltage there at when said deck is mounted in said body and a voltage when said deck is not mounted in said body.

A paper supplying device comprising:

• a body;
• a paper supplying box to carry papers and having a paper width setting mechanism, a variable resistor a resistance value of which changes in an interlocked relation with said paper width setting mechanism to output a paper width detecting voltage corresponding to said resistance value, and a switch for use in detection of a paper size in the longitudinal direction and for detecting a rear portion of papers carried on said paper supplying box;
• a resistance larger than the total resistance of said variable resistor connected in series with said variable resistor;
• and
• said switch being connected in parallel with said larger resistance so that said paper width detecting voltage output from said variable resistor may be input to a controller as a signal of paper size in the longitudinal direction.