US3521806A - Carton - Google Patents

Description

J. J. ESTY July 28, 1970 CARTON 2 fimofo wilest 3.

Filed June 14, 1967 m T N E V m JOSEPH J. 557') BY 2 ATTORNEYS July 28, 1970 J, s 3,521,896

' CARTON Filed. June 14, 1967 2 Sheets-Sheet .3

INVENTOR JOSEPH J. EST) A T TORNEYS U.s.;c1. 229-14 3,521,806 CARTON Joseph J. Esty, San Diego, Calif., .assignor of one-fourth to Oberlin J. Everson, San Diego, Calif.

Filed June 14, 1967, Ser. No. 645,9 68

Int. Cl. B65d 5/60 i I t j 3 Claims ABSTRACT THE DISCLOSURE A package for preserving perishable products, such as food and flowers, in which. the product is in an imper- .mcable container which has been purged, after the product is in the container, by forcing an .inert gas through the container. Thecomp osite package includes the .container enclosed in an inherently stable carton.

One embodiment comprises the steps of inserting a flexible container or-envelope'of the type that includes scalable tubing into an inherently-stable carton, and; placing the product to be packaged in the container..The container is sealed and then evacuated of air through the tubing. The container is then "pressurized with inert gas by forcing the gas through the tubing. The pressurized container 'is thensealed by sealing the tubing.

Un e 3W8 P ten 3,521,806 Patented July 28, 1970 "ice disposed in the carton 11. The container 17 includes flaps 18 forming an opening 19 for accepting perishable products such as fruits, vegetables, meats and flowers, apples 21, being illustrative. Plastic tubes 23 and 25 extend from carton- 11.'The cover 29 includes walls 33 that surround In carrying out the method, I prefer to usev two flexible,

sealable tubes. The envelopeis purged by forcing an inert gas through one of the tubes and dispelling the air through the other tube. After the purge is completed, the-tubes are sealed.

One embodiment of the package comprises an inherently stable carton which supports tubing extending through the walls thereof. A flexible scalable container having hermetically connected tubing, is disposed in the carton, the tubing being supported by the carton.

In a second embodiment, the carton walls terminate in a container receiving opening and a cover is adapted to be slid into covering relationship with the opening. The cover has walls, extending in one direction, that are adapted to surround the container walls. The cover walls include a slot extending from the edge and parallelly of the one direction, the slot being in alignment 'with the extending scalable tubing.

Other features and the advantages of the present invention will be apparent from the following description, reference being had to the accompanying drawings wherein preferred embodiments of the invention are illustrated.

In the drawings:

FIG. 1 is a perspective view of one embodiment of the package of this invention;

FIG. 2 is a perspective view of the package shown in FIG. 1, the stable carton being shown with the top open;

FIG. 3 is a sectional view of the package shown in FIG. 1, the view being taken along the line 33 of FIG. 1;

FIG. 4 is a fragmentary, sectional view of the package shown in FIG. 1, the view being taken along the line 44 of FIG. 1; and

FIG. 5 is a perspective view of another embodiment of the package.

Referring more in detail to the drawings, and particularly to FIG. 1, the package includes an inherently stable carton 11. The carton 11 is preferably of the conventional cardboard crating type and includes closing flaps 12 extending upwardly from the sides thereof. The carton 11 includes an inlet opening 13 juxtaposed one side and the top and an outlet opening 15 juxtapose the opposite side and the bottom.

A flexible, plastic, i.e., impermeable, container 17 is the walls of the carton 11 and is adapted to be slidably extended thereover. One wall of the cover 29 includes slots 35 and 37 for accepting the tubes 23 and 25, respec- 'tively. Thus, the cover 29 can be slipped over the carton 11 and secured into covering position with the tubes 23 and 25 extending therethrough and accessible to be connecte'd and sealed.

Shipping-cartons 11 of the type depicted in FIG. 1,

i are generally supplied to the packager in a collapsed form.

Thus, when it is desirable to package the produce 21 for "shipping or storage, the carton 11 is erected as shown in 'FIG. 2 The container 17 is then placed in the carton through the top opening and the tubes 23 and 25 are extended through the inlet and outlet openings 13 and 15, respectively. The produce, herein shown at 21, is then "inserted through the opening 19 infthe container and the opening is sealed. In the embodiment shown in FIG. 1, the envelope 17 is plastic and the opening 19 is sealed by pressing the flaps 18, forming the opening 19, together with conventional heat sealing mechanism. The flaps 12 are then closed and taped in a conventional manner.

Any suitable method can be employed for removing the air from the container and substituting an inert gas. I prefer to connect a hose (not shown) to a supply of inert gas, such as argon or nitrogen, and to the tube 23. The inert gas is then released into the container 17 through the tube 23 and the inert gas and air mixture is exhausted through the outlet tube 25.

It is noted that the inlet tube 23-outlet tube 25 arrangement depicted, elfects a very elfective flow pattern. This flow pattern is depicted in FIG. 2 by arrows. The incoming gas enters the container 17 from the front and is propelled generally along and parallel to the side nearest the inlet tube 23. When the gas reaches the back wall of the container 17, it is deflected inwardly from the side and passes generally along the back wall until it reaches the side nearest the outlet tube 25. The gas is again deflected and is directed back toward the front of the container 17 and will be forced downwardly to pass out the outlet tube 25. Thus, flow is assured throughout the container 17 and no air pockets will be left uncirculated when the purge is completed.

The inert gas purge is continued for a time sufficient to drive essentially all of the air out of the container 17. When the desired level of inert atmosphere is reached, approximately 99.8%, the purge is discontinued and while the container 17 is still pressurized, the tubes 23 and 25 are sealed. Sealing is preferably elfected by cutting of the plastic tubes 23 and 25 with hot scissors, thereby severing and sealing the tube simultaneously. Since both tubes 23 and 25 extend from the same side of the container 11, they are readily accessible to the worker during the packaging.

The remaining portions of the tubes 23 and 25 are then preferably tucked back into the carton 11. If desirable, the openings 13 and 15 may then be covered in any conventional manner. The packaged produce 21 is then ready for shipment and is maintained in an inert atmosphere. Spoilage and decaying of the produce is obviated since essentially all the oxygen has been purged from the container 17 and photosynthesis is suspended. Pressurization of the container 17 is preferred since if the oxygen were expelled and a vacuum left in the container, there would be greater danger of oxygen seepage into the container. The lack of oxygen will cause any animal life included in the container 17 to quickly suffocate and the produce 21 will be protected from insect damage.

The above described method is preferred since it is generally much more economical to force a purge through the container 17 to purge the air therefrom, rather than to evacuate the air by vacuum. However, if it were desirable to evacuate the air by pulling a vacuum, only one tube, as for instance 23, would be necessary. The air could be evacuated from the container 17 through the tube 23 and the container 17 could then be pressurized by pumping the inert gas in through the tube 23. The tube 23 would then be sealed in the manner described above.

Referring now to packaging the produce 21, in the package embodiment shown in FIG. 5, the same general procedure, as that first described, is followed, except that, rather than closing the flaps 12, the cover 29 is slid into position and secured, as by taping. The container 17 is then purged and the tubes 23 and 25 sealed as described above.

From the foregoing, it will be apparent that the packages herein described, provide simple, effective and economical means of packaging perishable produce, meats and flowers.

I claim:

1. An inherently stable package for shipping and preserving perishable products such as food and flowers, said package comprising:

(A) an inherently stable carton having:

(1) two openings for tubes; (B) a flexible and sealable container having:

( 1) a sealable product opening,

(2) a permanently sealable inlet tube, for purging gas, hermetically connected with the container, said tube being aligned with and extendable through one of the said openings in the carton for connecting the same with a source of purging gas.

(3) a permanently sealable outlet tube hermetically connected with the container, said latter tube being aligned with and extendable through the other of said openings in the carton.

2. A combination as defined in claim 1, characterized in that both openings are in the same side of the carton.

3. A combination as defined in claim 1, characterized in that the openings are positioned so that the incoming gas is directed by the inlet tube from one side of the carton and toward the opposite side and then directed toward the outlet tube spaced from the incoming gas.

References Cited UNITED STATES PATENTS 3,214,221 10/1965 Finnegan.

3,112,047 11/ 1963 Weinreich et al. 3,165,114 1/ 196-5 Garrett 22962.5 3,373,918 3/1968 Krings 229-62.5

DAVID M. BOCKENEK, Primary Examiner U.S. Cl. X.R. 22962.5

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