Bottom of a hollow body obtained by blowing or stretch-blowing a preform of a thermoplastic material, and hollow body comprising such a bottom
First Claim
1. A bottom of a hollow body, the hollow body being obtained by blowing or stretch-blowing a preform of thermoplastic material, said bottom comprising a transverse support surface, and on either side of said transverse support surface:
- a transverse outer edge;
a concave inner wall with a transverse central part containing a pellet of material of low crystallinity, said pellet corresponding to an injection point of the preform;
said bottom comprising reinforcing ribs, each reinforcing rib having a respective outer edge in proximity to the transverse outer edge of the bottom, each of the reinforcing ribs having an inner edge in proximity to the transverse central part but without reaching said transverse central part, wherein each of the reinforcing ribs flare outs from the respective outer edge towards the respective inner edge, and wherein the transverse outer edge is placed at a first height with respect to the transverse support surface, the transverse central part being placed at a second height with respect to the transverse support surface, the second height of the transverse central part being greater than the first height of the transverse outer edge, each of the reinforcing ribs having a bottom wall of substantially constant width over the whole length of the reinforcing rib.
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Accused Products
Abstract
A bottom (2) of a hollow body obtained by blowing or stretch-blowing a preform of a thermoplastic material. The bottom (2) includes a transverse support surface (4) and, on either side of the transverse support surface (4), a transverse outer edge (5) and a concave inner wall with a transverse central portion (10) having a pellet (11) of a low-crystallinity material. The pellet corresponds to the injection point of the perform. The bottom (2) has reinforcing ribs (1) having an outer edge (12) adjacent to the outer edge (5) of the bottom (2) as well as an inner edge (13) adjacent to the transverse central portion (10) but not reaching the transverse central portion (10). The reinforcing ribs (1) flare from their outer edge (12) toward their inner edge (13).
23 Citations
13 Claims
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1. A bottom of a hollow body, the hollow body being obtained by blowing or stretch-blowing a preform of thermoplastic material, said bottom comprising a transverse support surface, and on either side of said transverse support surface:
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a transverse outer edge; a concave inner wall with a transverse central part containing a pellet of material of low crystallinity, said pellet corresponding to an injection point of the preform; said bottom comprising reinforcing ribs, each reinforcing rib having a respective outer edge in proximity to the transverse outer edge of the bottom, each of the reinforcing ribs having an inner edge in proximity to the transverse central part but without reaching said transverse central part, wherein each of the reinforcing ribs flare outs from the respective outer edge towards the respective inner edge, and wherein the transverse outer edge is placed at a first height with respect to the transverse support surface, the transverse central part being placed at a second height with respect to the transverse support surface, the second height of the transverse central part being greater than the first height of the transverse outer edge, each of the reinforcing ribs having a bottom wall of substantially constant width over the whole length of the reinforcing rib. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A hollow body obtained by blowing or stretch-blowing a preform of thermoplastic material, the hollow body comprising:
a bottom, the bottom comprising; a transverse support surface; a transverse outer edge; a concave inner wall with a transverse central part containing a pellet of material of low crystallinity, the pellet corresponding to an injection point of the preform; reinforcing ribs extending radially beyond the support surface and each reinforcing rib having a respective outer edge in proximity to the transverse outer edge of the bottom and an inner edge in proximity to the transverse central part without reaching the transverse central part, each reinforcing rib flares outs from the respective outer edge towards the respective inner edge, and the respective outer edge is at a first height with respect to the transverse support surface, the transverse central part is at a second height with respect to the transverse support surface, and the second height of is greater than the first height, each of the reinforcing ribs having a bottom wall of substantially constant width over the whole length of the reinforcing rib.
Specification