Retortable packages

Details Retortable packages Retortable packages

1987-05-26

1988-04-05

Hall, George T.

Receptacles

Closures

Removable closure retained by adhesive or fusion means

53477, 53478, 53484, B65D 4100

Patent

active

047353392

ABSTRACT:
A retortable, hydraulically solid, sealed package (10) containing a liquid or semi-liquid food product (24) comprises a thermoplastics container (12) formed by a thermo-forming process and a heat-shrinkable thermoplastics closure diaphragm (20). The closure diaphragm is heat-sealed to a rim (18) of the container after the headspace above the product has been evacuated, and is subsequently subjected to external pressure so as to be non-elastically stretched and made to lie wholly in contact with the enclosed product. When retorted (e.g. for sterilization) the package suffers no visible deformation of the container (12), despite the considerable volume shrinkage of the container which may occur. The loss of volume caused by this volume shrinkage is accommodated by a reduction in the concavity of the diaphragm (20) caused by a corresponding heat-induced shrinkage of the diaphragm material. The diaphragm continues to exhibit a pleasing, smooth or smoothly curving surface, and the retorted package has a consumer-acceptable appearance.

REFERENCES:
patent: 4350263 (1982-09-01), Hoffman
patent: 4542029 (1985-09-01), Caner et al.
patent: 4605142 (1986-08-01), Itoh et al.

Affiliated with

Also associated with

Rating

Retortable packages does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Retortable packages, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Retortable packages will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2229329