separating roller 24 are connected to a motor not shown for activating the feed roller 20 in fig1 reference numeral 43 denotes a front plate for aligning the leading edges of sheets 18 on the sheet tray 16 referring to fig2 the feeding pressure regulator 22 mainly includes a feed stay 44 a feeding pressure varying motor 46 step motor a rack 48 a pressure applying arm 50 and a position detecting substrate 52 the rack 48 is movable transversely of the sheets 18 by the feeding pressure varying motor 46 the pressure applying arm 50 applies a pressure to the feed arm 40 the position detecting substrate 52 detects a lateral displacement of the rack 48 the feeding pressure varying motor 46 includes a worm 54 attached on its rotary shaft and transmits its rotational force to the rack 48 via a worm wheel 56 and a pinion 58 integral therewith the rack 48 has a slit 48a for moving itself a lateral movement of the rack 48 is controlled by a pair of stepped screws 60 as shown in fig2 a pressure applying spring 64 has its one end connected to one end of the rack 48 via a hook bracket 62 and has the other end thereof coupled to the pressure applying arm 50 via a pulley 66 the pressure applying arm 50 is supported by a shaft 68 attached to the feed stay 44 and is longitudinally movable returning to fig1 the other end of the pressure applying spring 64 is positioned below a rotational center of the pressure applying arm 50 in other words the rotational moment is generated at the pressure applying arm 50 by an urging force of.