Preform provided with a concave body portion

Patent metadata

Field	Value
Publication number	US-11161292-B2
Application number	US-201616061194-A
Country	US
Kind code	B2
Filing date	Nov 30, 2016
Priority date	Dec 16, 2015
Publication date	Nov 2, 2021
Grant date	Nov 2, 2021

Abstract

Disclosed is a container perform made from plastic material, including: a body; an open neck that extends from the body from which it is separated by a radially projecting flange; a bottom that closes the body opposite the neck; the body having a concave portion in axial cross section, where: B≤0.9·A 0.5.C≤C′≤0.95.C in which A is the overall diameter of the body, measured below the flange; B is the outer diameter of the bottom, measured at the junction of same with the body; C is the cumulative height of the body and the bottom, measured from the flange; C′ is the height, measured axially, of the concave portion of the body, and the concave portion has, in axial cross-section, on an outer surface, an outer radius of curvature RE such that: 1.5.0≤RE≤10.C

First claim

The invention claimed is:

1. Container preform ( 1 ) made of plastic material, which comprises:
a symmetrical body ( 3 ) of revolution around a central axis (X);
an open neck ( 5 ) that extends in continuation of the body ( 3 ) from which it is separated by a radial protruding flange ( 6 );
a bottom ( 7 ) that closes the body ( 3 ) opposite the neck ( 5 );
wherein the body ( 3 ) has a portion ( 11 ) that is concave in axial section and wherein:
B≤ 0.9 ·A
0.5 ·C≤C′≤ 0.95 ·C

where: A is the overall diameter of the body ( 3 ), measured under the flange ( 6 );
B is the outer diameter of the bottom ( 7 ), measured at its junction with the body ( 3 );
C is the cumulative height of the body ( 3 ) and the bottom ( 7 ), measured from the flange ( 6 );
C′ is the height, measured axially, of the concave portion ( 11 ) of the body ( 3 ), And
wherein the concave portion ( 11 ) has, in axial section, on an outside surface ( 10 ), an outside radius of curvature RE such that:
1.5· C≤RE≤ 10· C.

2. Preform ( 1 ) according to claim 1 , wherein:
0.65· C≤C′≤ 0.85· C.

3. Preform ( 1 ) according to claim 1 , wherein:
H≤G

where: G is the wall thickness of the preform ( 1 ) measured at a lower end of the concave portion ( 11 );
H is the wall thickness of the preform ( 1 ) measured at an upper end of the concave portion ( 11 ).

4. Preform ( 1 ) according to claim 3 , wherein:
H≤ 0.9· G

5. Preform ( 1 ) according to claim 3 , wherein:
H≥ 0.5· G.

6. Preform ( 1 ) according to claim 5 , wherein:
H≥ 0.7· G.

7. Method for manufacturing a container ( 2 ) by blow molding or stretch blow molding, which comprises:
the furnishing of a preform ( 1 ) according to claim 1 ;
the heating of the body ( 3 ) of the preform ( 1 ) by exposure to a monochromatic or quasi-monochromatic infrared radiation of a predetermined intensity;
the forming of the container ( 2 ) by injection of a pressurized fluid into the thus heated preform ( 1 ).

8. Method according to claim 7 , further comprising, between the heating and the forming, the introduction of the preform ( 1 ) into a mold ( 20 ) bearing the impression of the container ( 2 ).

9. Preform ( 1 ) according to claim 2 , wherein:
H≤G

where: G is the wall thickness of the preform ( 1 ) measured at a lower end of the concave portion ( 11 );
H is the wall thickness of the preform ( 1 ) measured at an upper end of the concave portion ( 11 ).

10. Preform ( 1 ) according to claim 4 , wherein:
H≥ 0.5· G.

11. Method for manufacturing a container ( 2 ) by blow molding or stretch blow molding, which comprises:
the furnishing of a preform ( 1 ) according to claim 2 ;
the heating of the body ( 3 ) of the preform ( 1 ) by exposure to a monochromatic or quasi-monochromatic infrared radiation of a predetermined intensity;
the forming of the container ( 2 ) by injection of a pressurized fluid into the thus heated preform ( 1 ).

12. Method for manufacturing a container ( 2 ) by blow molding or stretch blow molding, which comprises:
the furnishing of a preform ( 1 ) according to claim 3 ;
the heating of the body ( 3 ) of the preform ( 1 ) by exposure to a monochromatic or quasi-monochromatic infrared radiation of a predetermined intensity;
the forming of the container ( 2 ) by injection of a pressurized fluid into the thus heated preform ( 1 ).

13. Method for manufacturing a container ( 2 ) by blow molding or stretch blow molding, which comprises:
the furnishing of a preform ( 1 ) according to claim 4 ;
the heating of the body ( 3 ) of the preform ( 1 ) by exposure to a monochromatic or quasi-monochromatic infrared radiation of a predetermined intensity;
the forming of the container ( 2 ) by injection of a pressurized fluid into the thus heated preform ( 1 ).

14. Method for manufacturing a container ( 2 ) by blow molding or stretch blow molding, which comprises:
the furnishing of a preform ( 1 ) according to claim 5 ;
the heating of the body ( 3 ) of the preform ( 1 ) by exposure to a monochromatic or quasi-monochromatic infrared radiation of a predetermined intensity;
the forming of the container ( 2 ) by injection of a pressurized fluid into the thus heated preform ( 1 ).

15. Method for manufacturing a container ( 2 ) by blow molding or stretch blow molding, which comprises:
the furnishing of a preform ( 1 ) according to claim 6 ;
the heating of the body ( 3 ) of the preform ( 1 ) by exposure to a monochromatic or quasi-monochromatic infrared radiation of a predetermined intensity;
the forming of the container ( 2 ) by injection of a pressurized fluid into the thus heated preform ( 1 ).

16. Preform ( 1 ) according to claim 9 , wherein:
H≥ 0.5· G

17. Method for manufacturing a container ( 2 ) by blow molding or stretch blow molding, which comprises:
the furnishing of a preform ( 1 ) according to claim 9 ;
the heating of the body ( 3 ) of the preform ( 1 ) by exposure to a monochromatic or quasi-monochromatic infrared radiation of a predetermined intensity;
the forming of the container ( 2 ) by injection of a pressurized fluid into the thus heated preform ( 1 ).

18. Method for manufacturing a container ( 2 ) by blow molding or stretch blow molding, which comprises:
the furnishing of a preform ( 1 ) according to claim 10 ;
the heating of the body ( 3 ) of the preform ( 1 ) by exposure to a monochromatic or quasi-monochromatic infrared radiation of a predetermined intensity;
the forming of the container ( 2 ) by injection of a pressurized fluid into the thus heated preform ( 1 ).

19. Method for manufacturing a container ( 2 ) by blow molding or stretch blow molding, which comprises:
the furnishing of a preform ( 1 ) according to claim 16 ;
the heating of the body ( 3 ) of the preform ( 1 ) by exposure to a monochromatic or quasi-monochromatic infrared radiation of a predetermined intensity;
the forming of the container ( 2 ) by injection of a pressurized fluid into the thus heated preform ( 1 ).

Assignees

• Sidel Participations

Inventors

• Boukobza Michel
• Letestu Mickaël

Classifications

• B29C49/071 Primary

  Preforms or parisons characterised by their configuration, e.g. geometry, dimensions or physical properties · CPC title

• B29C2949/0715

  the preform having one end closed · CPC title

• B29B11/14 Primary

  characterised by structure or composition · CPC title

• B29C49/0005

  characterised by the material · CPC title

• B29C2949/0827

  of the bottom · CPC title