Method for producing a container intended to contain a substance to be dispensed by an airless pump, and a container produced by the method

Patent metadata

Field	Value
Publication number	US-9290280-B2
Application number	US-201313951224-A
Country	US
Kind code	B2
Filing date	Jul 25, 2013
Priority date	Jul 31, 2012
Publication date	Mar 22, 2016
Grant date	Mar 22, 2016

Abstract

A method for producing a container intended to contain a substance to be dispensed by an airless pump, having an external body inside which a bag is provided formed of thermoplastic material, the bag presenting, at least at a connection surface between its neck and its lateral surface, controlled deformation zones arranged to guide the bag deformation in accordance with preferential directions. The invention also relates to a container formed by the described method and a bag with the aforedescribed characteristics.

First claim

The invention claimed is:

1. A container for containing a substance to be dispensed by an airless pump, comprising
an external rigid body inside which a bag is provided formed of thermoplastic material having substantially the shape of an inner cavity of the rigid body, and also provided with a neck having a flange projecting radially from one end thereof,
the neck, at that end opposite the end at which the flange is present, being connected to a lateral surface of the bag,
said lateral surface comprising a closure bottom,
the bag presenting, at least at a connection surface between the bag's neck and the bag's lateral surface, controlled deformation zones arranged to guide the bag deformation in accordance with preferential directions pertaining to preferential longitudinally axial planes,
wherein at least a central portion of the lateral surface is free from said controlled deformation zones,
wherein the closure bottom presents further controlled deformation zones arranged to guide the bag deformation in accordance with further preferential directions,
wherein said controlled deformation zones or said further controlled deformation zones are defined by protuberances which project from the connection surface between said lateral surface and the neck, said preferential deformation planes passing external to said protuberances,
wherein the controlled deformation zones are arranged on at least a portion of an external edge of the connection surface between the neck of the bag and the lateral surface of the bag.

2. A bag to be inserted into the interior of a rigid body to form a container for containing a substance to be dispensed by an airless pump,
the bag formed of thermoplastic material having substantially the shape of the inner cavity of the rigid body, and also being provided with a neck having a flange projecting radially from one end thereof,
the neck, at that end opposite the end at which the flange is present, being connected to a lateral surface of the bag,
said lateral surface comprising a closure bottom,
the bag presenting, at least at a connection surface between its neck and its lateral surface, controlled deformation zones arranged to guide the bag deformation in accordance with preferential directions pertaining to preferential longitudinally axial planes,
wherein at least a central portion of the lateral surface is free from said controlled deformation zones,
wherein the closure bottom presents further controlled deformation zones arranged to guide the bag deformation in accordance with further preferential directions,
wherein said controlled deformation zones or said further controlled deformation zones are defined by protuberances which project from the connection surface between said lateral surface and the neck, said preferential deformation planes passing external to said protuberances,
wherein the controlled deformation zones are arranged on at least a portion of an external edge of the connection surface between the neck of the bag and the lateral surface of the bag.

3. The container as claimed in claim 1 , wherein said further preferential directions are coplanar with said preferential directions.

4. The container as claimed in claim 1 , wherein said controlled deformation zones or said further controlled deformation zones are defined by variations in the connection radius of the connecting wall between said neck and said lateral surface, or between said bottom and said lateral surface, said preferential deformation planes containing the points of greater connection radius.

5. The container as claimed in claim 4 , wherein said controlled deformation zones extend at most slightly beyond the connection surface between the shoulder and the lateral surface and said further controlled deformation zones extend at most slightly beyond the connection surface between the bottom and the lateral surface.

6. The container as claimed in claim 1 , wherein said controlled deformation zones are defined by radial depressions incorporated into the connection surface between said lateral surface and the neck, said preferential deformation planes passing external to said depressions.

7. The container as claimed in claim 1 , wherein the bag neck presents external grooves arranged to enable air to be vented and/or extracted during blow-moulding and operation of the bag inside the external body when associated with the airless pump, said grooves being formed by crests provided in the blow-moulding mould, said crests maintaining the bag in the desired position during its blow-moulding step.

8. The container as claimed in claim 1 , said neck presents external grooves arranged to enable air to be vented and/or extracted during blow-moulding and operation of the bag inside the rigid body when associated with the airless pump.

9. The bag as claimed in claim 2 , wherein said further preferential directions are coplanar with said preferential directions.

10. The bag as claimed in claim 2 , wherein said controlled deformation zones or said further controlled deformation zones are defined by variations in the connection radius of the connecting wall between said neck and said lateral surface, or between said bottom and said lateral surface, said preferential deformation planes containing the points of greater connection radius.

11. The bag as claimed in claim 2 , wherein said controlled deformation zones extend at most slightly beyond the connection surface between the shoulder and the lateral surface and said further controlled deformation zones extend at most slightly beyond the connection surface between the bottom and the lateral surface.

12. The bag as claimed in claim 2 , wherein said controlled deformation zones are defined by radial depressions incorporated into the connection surface between said lateral surface and the neck, said preferential deformation planes passing external to said depressions.

13. The bag as claimed in claim 2 , said neck presents external grooves arranged to enable air to be vented and/or extracted during blow-moulding and operation of the bag inside the rigid body when associated with the airless pump.

14. The container as claimed in claim 1 , wherein said controlled deformation zones consist of zones defined by variations in the connection radius of the connecting wall between said neck and said lateral surface, and said further connection zones consist of zones between said bottom and said lateral surface, said preferential deformation longitudinally axial planes containing the points of greater connection radius.

15. The bag as claimed in claim 2 , wherein said controlled deformation zones consist of zones defined by variations in the connection radius of the connecting wall between said neck and said lateral surface, and said further connection zones consist of zones between said bottom and said lateral surface, said preferential deformation longitudinally axial planes containing the points of greater connection radius.

16. A method for making the container of claim 1 for containing a substance to be dispensed by an airless pump, comprising the steps of:
a) preparing a substantially rigid external body, having a neck defining an access opening to an internal cavity of the body,
b) and preparing a bag made of thermoplastic material having substantially the shape of the internal cavity of the rigid body, and provided with a neck having a flange projecting radially from one end thereof, the neck, at that end opposite the end at which the flange is present, being connected to a lateral surface of the bag, said lateral surface comprising a closure bottom, and
c)

Assignees

• Lumson Spa

Inventors

• Moretti Matteo

Classifications

• B65D1/0292

  Foldable bottles · CPC title

• B65B3/18 Primary

  Controlling escape of air from containers or receptacles during filling · CPC title

• B65D83/62 Primary

  by membranes, bags or the like · CPC title

• B29C63/26 Primary

  Lining or sheathing of internal surfaces (B29C63/38 takes precedence) · CPC title

• B65D83/771

  for dispensing fluent contents by means of a flexible bag or a deformable membrane or diaphragm · CPC title