Press for compactable materials comprising: - a compacting chamber, - compacting means (10, 14) provided for exerting a compacting pressure in said compacting chamber along a compacting axis, said compacting means being provided for compacting compactable materials into a block of compacted materials (B1, B2) and for positioning said block of compacted materials at a first location, - transfer means (20, 40) arranged to move the block of compacted material along a transfer axis and from a first location to a second location, said transfer axis being transverse to said compacting axis, - a final outlet of the press, - ejection means (30, 34) arranged to move the block of compacted material along an ejection axis distinct from the compacting axis and from the transfer axis, transverse to the transfer axis, and aligned with said final outlet, in order to move the block of compacted material out of the second location and out of said press, and wherein said transfer means comprise a support and drive means for moving this support from the first location to the second location, the support and said compacting means being arranged so that when the support is at the first location, said compacting means (10, 14) allow the block of compacted materials (B1, B2) to be located onto said support, said press comprising a box having: - a first wall forming said support, - a second wall connected directly to the first wall and facing the compacting means (10, 14), the support being between the second wall and the compacting means, - a third wall connected directly to the second wall and facing the first wall, the second wall connecting the first and third walls, so as to form a "U"-shaped part defining a concavity suitable for receiving the compacted materials, the second wall being approximately perpendicular to the compacting axis characterized in that the box further comprises: - two parts, a lower part formed by said cavity, an upper part above the third wall of the box, - a fourth wall located in the upper part, connected to the third wall and extending from an edge of the third wall at the entrance to the concavity transversely to the compacting axis, the box being arranged in such a way that when the support is located in the second place, the said fourth wall is opposite the compacting means (10, 14) so that the compacting means can compact the compactable materials against this fourth wall. - a compacting chamber, - compacting means (10, 14) provided for exerting a compacting pressure in said compacting chamber along a compacting axis, said compacting means being provided for compacting compactable materials into a block of compacted materials (B1, B2) and for positioning said block of compacted materials at a first location, - transfer means (20, 40) arranged to move the block of compacted material along a transfer axis and from a first location to a second location, said transfer axis being transverse to said compacting axis, - a final outlet of the press, - ejection means (30, 34) arranged to move the block of compacted material along an ejection axis distinct from the compacting axis and from the transfer axis, transverse to the transfer axis, and aligned with said final outlet, in order to move the block of compacted material out of the second location and out of said press, and wherein said transfer means comprise a support and drive means for moving this support from the first location to the second location, the support and said compacting means being arranged so that when the support is at the first location, said compacting means (10, 14) allow the block of compacted materials (B1, B2) to be located onto said support, - a first wall forming said support, - a second wall connected directly to the first wall and facing the compacting means (10, 14), the support being between the second wall and the compacting means, - a third wall connected directly to the second wall and facing the first wall, the second wall connecting the first and third walls, so as to form a "U"-shaped part defining a concavity suitable for receiving the compacted materials, the second wall being approximately perpendicular to the compacting axis - two parts, a lower part formed by said cavity, an upper part above the third wall of the box, - a fourth wall located in the upper part, connected to the third wall and extending from an edge of the third wall at the entrance to the concavity transversely to the compacting axis,