Closure for retort container
AssigneeSonoco Development, Inc.
InventorTrevor Price
Life of this patent
Estimating the term…
Abstract
A retortable container is formed with an opening formed defined by a projecting rim. The rim includes an external surface and securing structure formed thereon. A flexible membrane is sealed to the rim and closes the opening. A closure is provided having a molded plastic tubular ring and a separately formed molded plastic disk. The tubular ring includes an overlapping flange at a top and directed inwardly towards an inwardly positioned open area. The skirt includes an engagement structure for securing the closure to the external surface of the rim. The disk is separately attached to the ring within the open area after the retort process is applied to the sealed bottle.
Claims26
A retortable container comprising:
- a container reservoir for storing product, the reservoir having a defined opening for discharge of the product, the opening formed within an upstanding rim projected from the reservoir body, the rim having an external surface and securing means formed thereon,
- a membrane secured to the rim and closing the opening, the membrane sealing the product within the reservoir;
- and
- a closure having
- a tubular ring, and
- a separately formed disk,
- the tubular ring having a skirt formed about a central axis, an overlap flange portion at a top end of the skirt and directed inwardly towards the central axis, an outwardly open area radially inward of the flange, the disk insertable into the open area for securing the disk and closing the open area,
- wherein the disk conforms to the dimensions of the open area, and the disk is retained by the flange within the open area to close the open area.
A closure for use with a container of the type having a projecting neck that defines a dispensing opening, communicating with an internal reservoir, and an annular rim, the closure comprising:
- a tubular skirt having an inside surface having an internal dimension adapted to receive the projecting neck of a reservoir container,
- attachment means formed on the inside surface of the tubular skirt, the attachment means for releasably attaching the closure to the projecting neck of the container,
- an annular flange directed inwardly from the tubular skirt at one longitudinal end thereof, the flange defining an open area, and the flange dimensioned to overlap the rim of the dispensing opening when the tubular skirt is secured to the projecting neck of the reservoir container, and
- a sealing disk separately formed from the tubular skirt and mounted in the open area defined by the flange, the flange and disk cooperating with one another to close the open area.
A retortable container comprising:
- a container having an internal reservoir for storing a retortable product, the reservoir having a defined opening for discharge of the product, the opening formed within an upstanding rim projected from a reservoir body, the rim having an external surface including securing means formed thereon,
- a sealing membrane secured to the rim and closing the opening, the sealing membrane sealing the product within the reservoir during a retort process, the sealing membrane formed with a foil material serving as a barrier layer;
- and
- a closure having
- a tubular ring, and
- a separately formed disk for selective assembly with the ring,
- the ring having a skirt formed about a central axis, an overlap flange portion at a top end of the skirt and directed inwardly towards the central axis, an outwardly open area radially inward of the flange, the ring being secured to the projected rim of the container over the sealing membrane in a closed position, with a portion of the sealing membrane exposed through the open area of the ring in the closed position,
- the disk is inserted into the ring of the closure, the disk conforming to the dimensions of the open area and covering the exposed portion of the sealing membrane,
- wherein the heat of the retort process is applied through the expose portion of the sealing membrane prior to the insertion of the disk into the open area inward of the ring.
Dependencies are inferred from the claim text.