Device with rigid receptacle and flexible cylindrical pouch for packaging fluids
View Patent ↗The invention relates to a device for packaging and dispensing a fluid product, having a leaktight flexible pouch ( 1 ) placed in a rigid bottle ( 10 ) and associated with a pump or a valve ( 13 ), this pouch having a cylindrical wall consisting of a sheet ( 2 ) rolled into a cylinder, one edge of which is fixed in a leaktight fashion to a flange forming a ring for fastening to the bottle and to the pump or the valve, this flange ( 4 ) consisting of a plastic material, the other edge of the said sheet is fixed in a leaktight fashion to a second flange forming the bottom of the pouch, this second flange ( 3 ) consisting of a plastic material, these flanges ( 3, 4 ) having a solid disk or a ring having a raised edge ( 3 A, 4 A) forming an annular lateral surface, to which the edge of the said sheet ( 2 ) forming the wall of the pouch is fixed, the said sheet ( 2 ) of the cylindrical wall being a multilayer sheet having at least one inner film of plastic material. According to the invention, the inner face of the said flanges carries a covering sheet ( 20 A, 20 B) entirely covering the inner face of the said flanges and also covering at least a part of the said inner annular lateral surface for fastening the edge of the said sheet ( 2 ) forming the wall of the pouch, and the said covering sheet ( 20 A, 20 B) has at least one film of the same plastic material as the said inner film of the said sheet of the cylindrical wall and a metal film, its plastic material film facing toward the inner face of the said sheet ( 2 ) constituting the cylindrical wall.
1. Device for packaging and dispensing a fluid product comprising:
a leaktight flexible pouch placed in a rigid bottle; and
a dispensing element, where said dispensing element has a pump or a valve,
said pouch having a cylindrical wall formed from a multi-layer pouch sheet rolled into a cylinder, a first top pouch edge of said dispensing element is fixed in a leaktight fashion to a first flange forming a ring for fastening to the bottle and to the dispensing element,
said first flange formed from a plastic material, a second bottom pouch edge of said multi-layer pouch sheet being fixed in a leaktight fashion to a second flange forming the bottom of the pouch,
said second flange formed from a plastic material, said first and second flanges having a solid disk or a ring having a raised annular lateral surface, to which the bottom pouch edge of said multi-layer pouch sheet forming the wall of the pouch is fixed, said multi-layer pouch sheet of the cylindrical wall having at least one inner layer of plastic material,
wherein the inner faces of said first and second flanges each carry a multi-layer covering sheet entirely covering their inner faces and also covering at least a part of said inner annular lateral surface for fastening the first top and second bottom edges of said multi-layer pouch sheet forming the wall of the pouch, and
wherein said multi-layer covering sheet has at least one layer of the same plastic material as said inner layer of said multi-layer pouch sheet of the cylindrical wall, said multi-layer pouch sheet and said multi-layer covering sheet both having an outer layer of a metal, said plastic inner layer of said multi-layer covering sheet facing toward the inner face of said multi-layer pouch sheet.
2. Device according to claim 1 , wherein said multi-layer covering sheet has outer metal layer with said inner plastic layer being of the same plastic material as said flanges, wherein said plastic material inner layer of said multi-layer covering sheet facing inward towards said pouch.
3. Device according to claim 1 , wherein said metal layers are made of aluminum.
4. Device according to claim 1 , wherein said plastic material is polyethylene.
5. Device according to claim 1 , wherein said layers of either one of said multi-layer covering sheet or said multi layer pouch sheet are made of polyethylene, polyethylene terephthalate, aluminum and polyethylene.
6. Device according to claim 1 , wherein said multi-layer covering sheet is welded onto the inner face of said multi-layer pouch sheet.