초록 ▼

Plastic container (1), characterized in that it comprises: a rigidified body (5),a bottom (8) extending to a lower end of the container (1) and comprising: an annular base (9) extending substantially perpendicular to the body (5) in the prolongation thereof;an annular step (10) extending fro

Plastic container (1), characterized in that it comprises: a rigidified body (5),a bottom (8) extending to a lower end of the container (1) and comprising: an annular base (9) extending substantially perpendicular to the body (5) in the prolongation thereof;an annular step (10) extending from the base (9) towards the interior of the container (1),a recess (12) at the center of the bottom (8) projecting towards the interior of the container (1),a deformable annular membrane (11) in the shape of a spherical cap extending substantially perpendicular to the body (5) between the step (10) and the recess (12).

대표청구항 ▼

1. Plastic container, characterized in that it comprises: a rigidified body,a bottom extending to a lower end of the container and comprising:an annular base extending substantially perpendicular to the body in the prolongation thereof;an annular step extending from the base towards the interior of

1. Plastic container, characterized in that it comprises: a rigidified body,a bottom extending to a lower end of the container and comprising:an annular base extending substantially perpendicular to the body in the prolongation thereof;an annular step extending from the base towards the interior of the container,a recess at the center of the bottom projecting towards the interior of the container, wherein the recess includes a conically shaped side wall having a smooth-walled lower conical portion, a smooth-walled upper conical portion having a narrower shape than the lower conical portion, and a recessed portion extending completely around the recess along the side wall in a circumferential direction so as to divide the upper and lower conical portions from each other,a deformable annular membrane, in the form of a curved surface having a radius of curvature substantially continuous and symmetrical of revolution around a main axis of the container extending substantially perpendicular to the body between the step and the recess,and wherein the membrane has a circular outer edge at a junction with the step, and the membrane has circular inner edge at a junction with the recess. 2. Container according to claim 1, characterized in that the bottom comprises ribs extending at least in part radially and projecting on the membrane towards the interior of the container. 3. Container according to claim 2, characterized in that the ribs have a V-shaped cross section. 4. Container according to claim 2, characterized in that the bottom comprises a flat region extending from the step, and a counter step extending from the flat region, and in that the ribs are anchored, at an external end, in the counter step. 5. Container according to claim 2, characterized in that the ribs extend radially. 6. Container according to claim 2, characterized in that the ribs have two radial sections connected by an intermediate curved section. 7. Container according to claim 2, characterized in that the bottom comprises a central rib dividing the membrane into two parts, namely a central part surrounding the recess and a peripheral part surrounding the central part. 8. Container according to claim 7, characterized in that the central rib has a V-shaped profile in cross section. 9. Container according to claim 7, characterized in that the ribs extend in projection on the peripheral part of the membrane. 10. Container according to claim 9, characterized in that the ribs are anchored in the central rib, or are tangential thereto. 11. Container according to claim 1, characterized in that the membrane has, prior to any filling, a concavity turned towards the interior of the container. 12. Container according to claim 1, characterized in that the membrane has, prior to any filling, a concavity turned towards the exterior of the container. 13. Container according to claim 1, characterized in that the membrane has a radius of curvature between 50 mm and 150 mm. 14. Container according to claim 13, characterized in that the membrane has a radius of curvature of approximately 100 mm. 15. Container according to claim 1, characterized in that it is heat set. 16. Container according to claim 1, characterized in that the body is smooth. 17. A plastic container, comprising: a rigid cylindrical body having a longitudinal axis; anda bottom provided at a lower end of the cylindrical body;the bottom including:an annular base disposed in a plane substantially perpendicular to the longitudinal axis;an annular step extending from the base towards an interior of the container;a recess at a center of the bottom, axially aligned with the longitudinal axis, and projecting towards the interior of the container, wherein the recess includes a top portion; and a deformable annular membrane surrounding the recess so as to be disposed between the step and the recess, the annular membrane being in the form of a curved surface having a radius of curvature substantially continuous and symmetrical of revolution around a main axis of the container and axially aligned with the longitudinal axis, so that a virtual center of the membrane is located on the longitudinal axis and wherein the membrane has a circular outer edge at a junction with the step, and the membrane has a circular inner edge at a junction with the recess,wherein the recess includes a conically shaped side wall extending in height from the junction at the circular inner edge to the top portion of the recess, wherein the side wall includes a smooth-walled upper conical portion, a smooth-walled lower conical portion, and a recessed portion located at substantially mid-height of the side wall, which extends along the side wall in a circumferential direction, directly between the upper and lower conical portions.