US2387217A - Wrapper - Google Patents

Description

" Oct. 16, 1945. w E. c. SCOTT 2,387,217

' WRAPPER Filed Jan. 22, 1943 fz/ereife C See if INVENTOR ATTEST ATTORNE Patented Oct. 16, 1945 UNITED STATES PATENT OFFICE WRAPPER Everette, C. Scott, Chicago, Ill., assignor to In- 7 dustrial Patents Corporation, Chicago, 11]., a corporation of Delaware Application January 22, 1943, Serial No. 473,159 3 Claims. (Cl. 229-87) This invention relates to an improved wrapper for a package and more particularly to a package wrapper for insulating a product against heat transfer.

It is an object of this invention to provide an improved unitary package wrapping means for insulating a product against a heat transfer.

It is another object of this invention to provide a flexible wrapper for protecting a product against damage by heat transfer.

It is another object of this invention to provide a unitary and flexible wrapper for shipping a refrigerated product.

Other objects will appear from the description given below.

In the drawing:

Figure 1 is a perspective view of one form of a wrapper embodying the principles of this invention.

Figure 2 is a perspective View, partly broken away, of the wrapper as applied to a'iproduct, and

Figure 3 is a perspective view of another, form of the wrapper structure.

invention is offered as a solution is to be found 30 in the shipping of frozen confections to outlying points for distribution. As the refrigerating art has been improved and additional smaller storage units have been made available to all, the nehas also been suggested, for smaller units, that flexible blankets made up in a; composite form of several separable elements be used. However,

none of these known forms of containers has been units of frozen products whereby they may be easily packaged for shipment. As shown in Fi ure 1 the present invention provides a flexible heat insulating layer l0 whichjs adapted to be,-

wrapped around the product. The insulating ma- 7 terial itself may be made of any of the many materials now available but preferably a cellulose product, known commercially as Forest Fleece, is used. The insulating layer may be sealed between two sheets of paper with the outer layer ll being made of relatively heavy paper to stand the wear and tear of normal shipping. Fixedly secured to l the inner surface of the insulating layer, is a pad of corrugated paper l2 having corrugations of such size that a gas flow may take place therethrough when the package is completed as will appear more fully below.

The wrapper constructed as above described is not limited in its application to a product or container of a specific size but it may be applied around products or their containers of varying sizes within limits of course and the product enclosed in a properly applied wrapper will be met-- oughly insulated against heat transfer from out-,

cessity for getting small units of ice cream to side of the package. The product to be wrapped isolated stores, etc., in an economical manner has arisen.

Since the widespread use of dry ice has come about, it has been used for shipping such frozenconfections in small packages to these outlyin 40 stores and the individual packages have been forwarded by bus, train and other forms of transportation which do not have special means for handling refrigerated products. Many types of packages have been proposed for the handling of frozen confections together with a lump of dry ice for shipment and the present invention provides an improvement in this packaging art. I

The usual shipping container for this type of cardboard box having various devices for insulating the walls so that the frozen product may be placed therein for shipment. The box may be formed in several pieces and many manipulations should be arranged on the layer of corrugated paper such that when the wrapper is applied around the periphery of the' material to be shipped, the ends of the corrugated pad will be disposed in abutting relation. This is the pre-- ferred manner of using the invention but it is not necessary that this be followed in every case. When the product has been wrapped so that the corrugated paper is disposed around the periphery of the product, a block of carbon dioxide ice may be disposed in each end of the package and preferably the corrugated paper shall extend past the product to provide an upstanding wall surrounda ing the block of ice. After the ice has been placed product comprises a substantially rigid corrugated package, the joints must be sealed against the free passage of gases.

When the package has been arranged in this must be performed to complete the packaging. It manner, the cold gas flowing from the block of Dry Ice may pass through the flow channels surrounding the product so that the product will be maintained at a uniform temperature. It will be seen that by reason of its flexibility and the arrangement of its elements, the wrapper may be readily adapted to the packaging of orders of various sizes and the product will be efliciently cooled 'in transit. The size of the block of carbon dioxide ice is controlled by the length of time required to make the shipment as will be fully understood.

In packaging relatively small orders, the corrugated pad may be longer than the dimension of the periphery of the product and so when wrapped around the product, may overlay a portlon of the insulating blanket, but as the blanket is formed of relatively soft material, the corrugations of the pad may be pressed into the blanket so that the bulk of the package may be reduced; This will also serve to prevent circulation of the cold gases in that part of the packr the product is well padded against possible damage by jarring.

In Figure 3, another form of the wrapper is shown wherein the insulating blanket H is ofa length equal to the-periphery of the product being wrapped so that the blanket will just neatly ,wrap around the product. The inner layer of corrugated paper Ii fixed to the insulating pad I4 is of, the same length. The outer layer ii of this wrapper is of such length however that 1. A unitaryand flexible heat insulating wrapper for a product comprising a flexible non-heat conductive layer, an outer flexible covering for said layer, an inner flexible layer having means for forming a plurality 'of closely adjoining gas flow passages to direct a circulating gas against substantially the entire periphery of the wrapped product, said covering and said inner layer being fixedly adhered to said non-heat conductive layer, whereby the wrapper may be applied around a product with said inner layer adjacent the product and with said outer layer enclosing the product and the other layers to form a heat insulated package for the product wherein a substantially uniform temperature may be maintained around the product by reason of the gas circulating through said flow passages.

2. A unitary and flexible heat insulating "wrapper for a product comprising a flexible non-heat conductive layer having dimensions such that it may be wrapped around said product to form at least a single layer over all sides thereof, an outer flexible covering for this Wrapper having dimensions such that it may be wrapped around said product to form at least two layers, an inner flexible layer having means for forming a pinrality of closely adjoining gas flow passages to direct a circulating gas against substantially the entire periphery of the wrapped product, said covering and said inner layer being positively adhered to said non-heat conductive layer, whereby the wrapper may be applied around a product with said inner layer adjacent the product and with said outer layer enclosing the 85 product and th other layers to form a heat init. may be wrapped around the entire package twice. The outer sheet l6 thus provides a protective layer for completing the package and preventsany possible circulation of air through the crack formed at the ends of the blanket II where they abut.

In using either form of .the invention here shown, the block of Dry Ice disposed at each end of the frozen product evaporates so that the product will be cooledand will be maintained frozen. The cool vapor flowing from the carbon dioxide will contact the product as it flows down the channels provided around the product by the inner layer of corrugated paper and the product will be maintained uniformly cold throughout.

, per for a product comprising a flexible non-heat It will be noted that the corrugated paper forms 7 conductive layer having dimensions such that it may be wrapped around said product to form a single layer over all sides thereof, an outer flexible covering for this wrapper having dimensions such that it may be wrapped around the product to form two layers, an inner flexible layer having means for forming a plurality of closely adjoining gas flow passages to direct a circulating gas against substantially the entire periphery of the wrapped product, said covering and said inner layer being positively adhered to said non-heat conductive layer, whereby the wrapper may be applied around a product with said inner layer adjacent the product and with said outer layer enclosing the product and the other layers to form a heat insulated package for the product wherein a uniform temperature may be maintained around the product by reason of the gas circulating through said flow passages.

EVERETI'E C. SCOTT.

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