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US 10,442,128 B2Granted
Container with a reinforced base, and method for manufacturing such a container
AssigneeSidel Participations
InventorMikael Derrien
Life of this patent
Estimating the term…
Abstract
Container (1) having a body (6) and a bottom (7) that together delimit an internal primary volume (11) of the container (1), this container (1) also comprising a protruding base (12) comprising an outer wall and an inner wall, the base (12) comprising a skirt which protrudes from the region (8) of the join between the body (6) and the bottom (7), and a foot which lies at a lower end of the skirt and defines a setting-down plane for the container (1), in which container: —the walls are locally welded together in the region of the skirt; —the foot forms a hollow bulge, and the outer wall, the inner wall and the setting-down plane together define a secondary volume isolated from the primary volume (11) by the weld.
Claims10
A method for manufacturing a container (1), comprising:
- forming a neck (3), a body (6), a bottom (7), and a base (12), the neck (3), the body (6), and the bottom (7) jointly delimiting an inner primary volume (11) of the container (1), and the base (12) formed to project from a joining area (8) between the body (6) and the bottom (7) by a fold of material that includes an outer wall (13) formed from an extension of the body (6), and an inner wall (14) formed from an extension of the bottom (7),
- said base (12) comprising a skirt (15), at a location where the outer wall (13) and the inner wall (14) are in mutual contact, and a foot (16) that extends from a lower end of the skirt (15) and in which an air bubble is trapped, said foot (16) defining a standing plane (17) for the container (1), and
- the bottom (7) of the container, from the joining area (8) to a central area (10) surrounded by the joining area (8), formed as an arch that is concave facing an interior of the container,
- said forming comprised of the sub-steps of:
- providing a mold (20) having a peripheral wall (21) defining a cavity (22) with an inner surface constituting an impression of the body (6) of the container (1) and an impression of the outer wall (13) of the base (12), and also having a mold bottom (24) that has a raised surface (25) having a shape that constitutes an impression of the bottom (7) of the container (1) and of the inner wall (14) of the base (12) and that works with an open end of the cavity (22),
- the mold bottom (24) and the peripheral wall (21) being mounted to move in relation to one another between an initial position, in which the raised surface (25) is separated from the cavity (22), and a final position, in which the raised surface (25) blocks the opening of said end to complete the impression of the container;
- inserting a previously heated parison (2) into the mold (20) while the mold bottom (24) and the peripheral wall (21) are in the initial position;
- injecting a pressurized fluid into the parison (2);
- placing the mold bottom (24) and the peripheral wall (21) in the final position in such a manner as to bring about said fold of constituent material of the skirt (15) thus forming the foot (16) in which the air bubble is trapped;
- extracting the thus formed container (1) from the mold (20);
- a welding operation of welding the outer wall (13) and the inner wall (14) of the base (12) in the area of the skirt (15), within a welding device (32) that is separate from the mold (20);
- and
- an operation, prior to the welding operation, of bringing the inner wall (14) and the outer wall (13) into contact over the entire length of the skirt (15) in such a way that the skirt (15) extends projecting from the joining area (8) between the body (6) and the bottom (7).
10 more elements
A method for manufacturing a container (1), comprising:
- forming a neck (3), a body (6), and a bottom (7), and a base (12),
- said neck (3), body (6), and bottom delimiting an inner primary volume (11) of the container (1), and the base (12) projecting from a joining area (8) between the body (6) and the bottom (7),
- said base (12) being formed by a fold comprising an outer wall (13) formed of an extension of the body (6) and an inner wall (14) formed of an extension of the bottom (7),
- said base (12) comprising a skirt (15) formed by respective portions of the outer wall (13) and the inner wall (14) being brought into contact with each other and projecting from the bottom in one of an annular or a conical manner, and a foot (16) extending from the skirt opposite the bottom (7) of the container at a location where the outer wall (13) and the inner wall (14) separate from each other and enclose a secondary volume (18) therebetween, the foot forming a standing plane (17) for the container (1) at a terminal end of the foot, and
- the bottom (7) of the container, extending from the joining area (8) inward to a central area (10) of the bottom (7) surrounded by the joining area (8), formed as an arch that is concave facing an interior of the container,
- said forming including the sub-steps of:
- providing a mold (20) that has a peripheral wall (21) defining a cavity (22) with an inner surface constituting an impression of the body (6) of the container (1) and an impression of the outer wall (13) of the base (12), and also has a mold bottom (24) with a raised surface (25), having a shape that constitutes an impression of the bottom (7) of the container (1) and of the inner wall (14) of the base (12) and that cooperates with an open end of the cavity (22),
- the mold bottom (24) and the peripheral wall (21) being mounted to move relative to one another between a first initial position where the raised surface (25) is separated from the cavity (22), and a second final position where the raised surface (25) blocks the opening of said end to complete the impression of the container;
- inserting a previously heated parison (2) into the mold (20) while the mold bottom (24) and the peripheral wall (21) are in the first initial position;
- injecting a pressurized fluid into the parison (2);
- moving the mold bottom (24) and the peripheral wall (21) into the second final position so as to form the fold of the skirt (15) with the inner wall and the outer wall, thereby forming the foot (16) at a lower end of the skirt and in which an air bubble is trapped;
- extracting the thus formed container (1) from the mold (20);
- and
- welding, within a welding device (32) that is separate from the mold (20), the outer wall (13) and the inner wall (14) of the base (12) of the skirt (15);
- and
- prior to the welding operation, of bringing the inner wall (14) and the outer wall (13) into contact over the entire length of the skirt (15) in such a way that the skirt (15) extends projecting from the joining area (8) between the body (6) and the bottom (7).
13 more elements
Dependencies are inferred from the claim text.