A device for feeding blanks to a machine for further processing in particular to a packing machine, comprising: - feed means for feeding a stack (P) of blanks disposed in succession in a superposed configuration; - at least one stop element disposed at a first end (P1) of the stack (P) of blanks and configured to retain the stack (P) of blanks ; wherein the feed means are configured to feed the stack (P) of blanks in such a way that the stack (P) of blanks is subjected to a pushing action (F) in the direction of the at least one stop element , in particular by gravity and/or by means of a pushing member applied to a second end of the stack (P), opposite to the first end (P1); the feed means also comprise at least one compensating belt having an upper section running parallel to the feed direction (A) of the stack (P) of blanks and defining a bottom support of a predefined portion of the stack (P) of blanks so that the predefined portion of the stack (P) rests, preferably rests exclusively on, the upper section of the at least one compensating belt , and in that the compensating belt is associated with adjustment means configured to adjust the feed speed of the compensating belt in such a way as to vary the thrust on the stop element ; characterized in that the compensating belt is a suction belt connected to a pneumatic suction source and in that the device comprises, between the at least one compensating belt and the at least one stop element , at least one aligning belt disposed and/or configured to come into local contact with an outfeed end stretch (P2) of the stack (P) of blanks and in such a way as to ensure that each blank of the outfeed end stretch (P2) is progressively aligned with a positioning plane, specifically by localized acceleration or deceleration performed by the aligning belt . - feed means for feeding a stack (P) of blanks disposed in succession in a superposed configuration; - at least one stop element disposed at a first end (P1) of the stack (P) of blanks and configured to retain the stack (P) of blanks ; wherein the feed means are configured to feed the stack (P) of blanks in such a way that the stack (P) of blanks is subjected to a pushing action (F) in the direction of the at least one stop element , in particular by gravity and/or by means of a pushing member applied to a second end of the stack (P), opposite to the first end (P1); the feed means also comprise at least one compensating belt having an upper section running parallel to the feed direction (A) of the stack (P) of blanks and defining a bottom support of a predefined portion of the stack (P) of blanks so that the predefined portion of the stack (P) rests, preferably rests exclusively on, the upper section of the at least one compensating belt , and in that the compensating belt is associated with adjustment means configured to adjust the feed speed of the compensating belt in such a way as to vary the thrust on the stop element ; characterized in that the compensating belt is a suction belt connected to a pneumatic suction source and in that the device comprises, between the at least one compensating belt and the at least one stop element , at least one aligning belt disposed and/or configured to come into local contact with an outfeed end stretch (P2) of the stack (P) of blanks and in such a way as to ensure that each blank of the outfeed end stretch (P2) is progressively aligned with a positioning plane, specifically by localized acceleration or deceleration performed by the aligning belt . <EOS>