Abstract This invention is concerned with a package for frozen food that is compressed as it is packed. The package is designed to permit air driven from the food in the compression to escape from the package and to seal the food of the package against the harmful effects of dehydration in use. The novelty of the invention consists of the type of board from which the package is made. The board has an outer air impervious layer, a center air pervious layer and an inner moisture-resistant layer that is perforated to permit the passage of air. In use the inner layer is against the food product. As the food product is compressed, air passes through the perforations in the inner layer and is driven along the center air pervious layer to and out the edge of the package. The outer air impervious layer prevents air from damaging the food product under conditions of storage.
A folding frozen food carton for a compressible food product to be frozen after compression, the principal walls of which are board, said board comprising a center layer of air permeable material, an outer facing of an air barrier material adapted to prevent dehydration of a food product in the carton due to passage of air thereover in use, an inner facing of a moisture resistant, and substantially liquid impermeable air-pervious material adapted to protect said center layer against moisture from contact with a moist food product and to admit air into said center layer as said carton is compressed with an air-containing product therein, said board from which said carton is made terminating in free edges, said center layer having a permeability adapted to pass air admitted thereto through said inner facing as it is compressed against a food product in use to and out said free edges of said board, said inner and outer facings being plastic, said inner facing being perforated to make it moisture resistant, air pervious and substantially liquid impermeable as aforesaid.
Claim 2
Dependent Claim
177 words
A folding frozen food carton for a compressible food product to be frozen after compression, the principal walls of which are board, said board comprising a center layer of air permeable material, an outer facing of an air barrier material adapted to prevent dehydration of a food product in the carton due to passage of air thereover in use, an inner facing of a moisture resistant, and substantially liquid impermeable air-pervious material adapted to protect said center layer against moisture from contact with a moist food product and to admit air into said center layer as said carton is compressed with an air-containing product therein, said board from which said carton is made terminating in free edges, said center layer having a permeability adapted to pass air admitted thereto through said inner facing as it is compressed against a food product in use to and out said free edges of said board, said inner and outer facings being plastic, said inner facing being perforated to make it moisture resistant, air pervious and substantially liquid impermeable as aforesaid.