权利要求：
1. Method of layer-by-layer production of objects by laser transfer printing in a 3D print apparatus comprising at least one plate (28), at least one laser source (50), and at least one carrier cylinder (51); wherein the material of the carrier cylinder (51) is transparent to the laser beams (50a) from the laser source (50) and the laser source (50) is disposed above the carrier cylinder (51), wherein the method comprises the following steps: (a) coating at least part of the outer surface of the carrier cylinder (51) with at least one print material (54); (b) irradiating the carrier cylinder (51) with laser beams (50a) from the laser source (50), such that at least a portion of the applied print material (54) is detached from the carrier cylinder (51) and is transferred to the plate (28), to an extrinsic component (7) positioned thereon or to a previously applied print material layer; wherein the irradiation is effected in such a way that the laser beams (50a) hit the print material (54) applied to the lower side of the carrier cylinder (51) directly through both walls of the carrier cylinder (51) from outside the carrier cylinder (51), (c) forming a print material layer by curing the print material (54) transferred in step (b), (d) repeating steps (a) to (c) until the object has been fully constructed.
2. Method according to Claim 1, wherein a continuous belt (9) is in a movable arrangement on the plate (28) and, in step (b), print material (54) is detached from the carrier cylinder (51) and is transferred to the continuous belt (9), to an extrinsic component (7) positioned thereon or to a previously applied print material layer.
3. Method according to Claim 1 or 2, wherein step (b) is preceded by charging of the print material (54) applied to the carrier cylinder (51) to a potential phi_1, and charging of the plate (28) to a potential phi_3, wherein phi_1 and phi_3 have opposite polarities.
4. Method according to Claim 3, wherein the surface of the extrinsic component (7), of the previously applied print material layer and/or of the continuous belt (9) is additionally charged to a potential phi_2, wherein phi_2 and phi_1 have opposite polarities and phi_2 is chosen such that at least a portion of the charge on the print material (54) transferred in step (b) is neutralized on the surface to be printed.
5. Method according to any of Claims 1 to 4, wherein the carrier cylinder (51) rotates and, in step (a), an application system (52) applies a layer comprising print material (54) to the carrier cylinder (51), and print material (54) that has not been detached after step (b) is removed from the carrier cylinder (51) by a removal system (53) .
6. Method according to any of Claims 1 to 5, wherein the print materials used are one or more of the following object-forming materials: silicones, polyacrylates, polyolefins, polyurethanes, polyureas, polynitriles, polyesters, polyethers, polylactides, polyhydroxyalkanoates, and mixtures, solutions, dispersions or copolymers comprising one or more of the aforementioned object-forming materials.
7. Method according to any of Claims 1 to 6, wherein at least one print material is selected from the group consisting of crosslinkable silicone elastomer compositions, silicone gels, silicone resins, silicone oils and silicone dispersions.
8. Method according to any of Claims 1 to 7, wherein the print material used additionally includes one or more support materials that are removed after the object has been constructed.
9. Method according to any of Claims 1 to 8, wherein the focal point (50b) of the laser beams (50a) is chosen such that it is within the carrier cylinder within a range from 0.01 mm to 10 mm above the interface between print material (54) and carrier cylinder (51).
10. Method according to any of Claims 1 to 9, wherein the plate (28) is a movable vacuum plate that fixes the continuous belt (9) for step (b) at a particular distance from the coated carrier cylinder (51).
11. Method according to any of Claims 1 to 10, wherein the surface to be printed on the plate (28), the continuous belt (9), the extrinsic component (7) or the previously applied print material layer is electrostatically discharged by means of a preliminary discharge module (29) before step (b) and before any charging to potential phi_2 or phi_3.
12. Method according to any of Claims 1 to 11, wherein the material of the carrier cylinder (51) is selected from the group consisting of glass, quartz glass, polyethyleneterephthalate, polycarbonate, polyimide, polymethylmeth-acrylate, ZnSe, ZnS, BaF2, CaF2, Ge, KBr, NaCl, MgF2, LiF and Si.
13. 3D print apparatus for production of objects by laser transfer printing, comprising - at least one laser source (50); - at least one carrier cylinder (51), wherein the material of the carrier cylinder (51) is transparent to the laser beams (50a) from the laser source (50), - at least one application system (52) set up to coat at least part of the outer surface of the carrier cylinder (51) with at least one print material (54); - at least one plate (28), wherein the laser source (50) is disposed above the carrier cylinder (51) and is set up to irradiate the carrier cylinder (51) such that at least a portion of the print material (54) applied to the carrier cylinder (51) is detached and is transferred to the plate (28), to an extrinsic component (7) positioned thereon or to a previously applied print material layer, wherein the 3D print apparatus is set up such that the laser beams (50a) hit the print material (54) applied to the lower side of the carrier cylinder (51) directly through both walls of the carrier cylinder (51) from outside the carrier cylinder (51) .
14. 3D print apparatus according to Claim 13, wherein a movable continuous belt (9) is arranged on the plate (28).
15. 3D print apparatus according to Claim 13 or 14, wherein the 3D print apparatus comprises at least one charging/discharging module (23) set up to charge the surface of the print material (54) applied to the carrier cylinder (51), the surface of the plate (28) and/or the target surface to be printed each independently to a particular potential phi.
16. 3D print apparatus according to any of Claims 13 to 15, wherein the 3D print apparatus comprises at least one curing module (22) set up to cure the print material (54).
17. 3D print apparatus according to any of Claims 13 to 16, wherein the 3D print apparatus comprises at least one removal system (53) set up to remove print material (54) that has not been detached from the carrier cylinder (51).