Abstract: The present invention concerns a compact, simple, and economical supply device providing high speed splicing with no operator intervention, as well as automatic spool loading and unloading. The paper supply device (1) comprises two winders (2, 3) each supporting a spool of paper (4, 5), the first of which is a working spool and the second, a reserve spool, and a mechanism (6) for automatically splicing the end of the strip on the working spool with the beginning of the strip on the reserve spool. It is characterized in that the automatic splicing device (6) is located between the two winders (2, 3) and comprises two diversion rollers (60, 61) which rotate freely on at least one common plate (62), the plate rotating on a axle affixed to a trolley (63) so as to alternately place the diversion rollers (60, 61) in a first connection position and then in a second connection position, corresponding respectively to the working spool, with the trolley (63) being movable in translation from one spool to the other.