US2085458A - Box - Google Patents

Description

June 29, 1937. c. H. WALKER 2,085,458

Filed Nov. 19, 1954 INVENTOR. CLARENCE H WALKER ATTORNEYS.

20 embodied in other forms within the purview of and outer sheets of fiber board l-Z enclosing the Patented June 29, 1937 2 35,45g

UNITED STATES ATEhii OFFER BOX 2 Clarence H. Walker, San Mateo, Calif. Application November 19, 1934, Serial No. 753,71}

7 2 Claims. (Cl..229 ----43) p This invention relates to improvements in boxes Fig. 3 is a vertical section of the upper porand more particularly to fiber boxes for shipping tion of the box with the cover thereon. and the method of shipping perishables. Fig. 4 is an enlarged fragmentary detail in Among the objects of the invention is toprovertical section of a modification in which the 5 duce a thermo-insulating box of conventional masealing flange forms an integral part of the cover 5 terial that will prevent the interchange of interior flange. and exterior atmosphere. Fig. 5 is" a similar View in which the sealing Another object is to produce such a box withflange on the box is bent outward to engage the out materially adding to the cost of conventional flange of the cover. I shipping boxes of the same capacity. Fig. 6 is a similar view in which the sealing 10 A further object is to stiffen the open edge of flange is applied to the under side of the cover the box to prevent it springing away from the parallel with the outer flange on the cover to telescoping flange of the cover. form a channel to receive the unflanged edge Other objects and advantages will appear as the of the box. description progresses. Fig. 71s a similar view showing a greatly en- 5 In this specification and the accompanying larged detailof the structure of the cellular board drawing, the invention is disclosed in its preferred prefer bly ed in the S ructure f the box. forms. It is to be understood, however, that it is In detail, the construction illustrated in the 7 not limited to these forms because it may be drawing, referring to F g. Comprises the inner the claims following the description. corrugated core 3 of similar material all glued to- The present disclosure relates particularly to gether to form a laminated assembly s mathe shipment of perishables such as natural terial and the basic structure of the box are flowers. The cars for such shipments are pro- Co v nt al e pt as improved y the present vided with compartments containing ice over or invention. 25 through which a forced draft of air is directed by e bOX is preferably formed from S e the ventilating system. The danger in any suitsheet of cellular fiber board blanked to form the able system of transportation is not the refrigbott0m4 with the integral sides and ends 55 and erated or maintained temperature, but it occurs 66 respect y e ends have the integral when the boxes are withdrawn or subjected to tabs formedthereon- The Outline of e 30 either a rise or a drop in temperature in the inbottom 4 and the tabs are indented or scored terior of the boxes. To overcome this effect, it to facilitate bend ng when the box is set up. The has been the practice heretofore to ra th tabs fold inward and are joined to the adjacent flowers carefully in paper before boxing and then e ds of the Sides by gluing y e nched to wrapthe boxes with an outer layer of paper. Staples This forms the Conventional 35 These precautions consume extra time and matanglflar O terial besides adding to the weight that must The sides and ends have e dly extendbe paid for at express rates and reduces the quaned Sealing flanges d ntegra therewith tity of profitable commodity that can be carried and bendable at the SCOIB 111168 d out 40 in a given carrier space. away at ll--l2 to form miter joints at l3 when 40 Another method is to refrigerate each box the sealing flanges r folded inward as in Fig. 1. separately with ice, or dry ice, which requires When the flanges 5-5' are flexed inwardly on even greater care in wrapping to exclude air the indented score lines at 9-40, the oppo P circulation through the boxes to avoid excessive tions of the walls form cushions which urge the dissipation of the cooling element and evaporaflanges upward as in Figs. 1 and 2, see also Fig. 7, 45

Fig. 1 is a perspective View from above lookends 56. The cover end flanges also have intion of the flower moisture by the exchange of The conventional cover comprises the top H interior and exterior atmosphere. with the down-turned flange I5 adapted to tele- In the one sheet of drawings: scope over the upper margins of the sides and ing into an open box constructed in accordance tegral tabs l5 to join the end flanges to the 0 with this invention. side flanges E5 to form a flange entirely encircling Fig. 2 isan enlarged fragmentary detail of a the top of the box in the usual manner. It is corner of the box before the sealing flanges are preferable to fold the tabs '!'i inward and the bent inward. cover tabs 55' outward to form smooth meeting 55 surfaces between the cover flange l5 and the walls of the box to insure a snug frictional fit.

When the cover I4 is pressed down on the box, the inclined sealing flanges 5'5 and 66' engage the under side of the cover and are forced downward against their normal urge upward as previously described. The sealing flanges present the sharp edges IE to the plane of the cover which insures a continuous line contact therewith flexible enough to conform to normal distortions in the plane of the cover l4 and insure a sufliciently airtight seal therewith when thebox is roped. It has been demonstrated that such a box will withstand pressures above atmosphere. It is not the intention to make an airtight box but to seal the box against exchange of interior and exterior air due to drafts, air blasts, expansive and contractive changes in temperature or thermosyphonic action.

In the modification shown in Fig. 4, the flange 54 is bent outward to'seal against the flange l5 when the cover is pressed down. In this instance, the corners of the flanges are not mitered as at ll-I2 but abut each other at the corners.

The modification in Fig. 5 is a simple reversal of parts with the same result. The flange 55 is integral with the flange l5 and is folded inward and sealed against the sides and ends of the box.

Fig. 5 is a further modification in which the flange 56 is'glued or otherwise fixed to the cover H to form a channel with the flange l5 to enclose the unflanged edge of the box. This type of seal is more expensive to produce but has certain advantages, especially in boxes of larger capacities since the seal is more positive and adds to the stability of the upper portion of the box.

The form shown in Fig. 1 is preferred because of its simplicity, ease of production and manipulation and the further fact that the mitered corners of the flanges 5'-6 form an internal reinforcing frame for the upper portion of the box.

In extreme cases where additional sealing is desirable, the upper surfaces of the flanges 56 can be coated with cotton lint, felt or other fuzzy material.

This improved box is packed and tied with rope or twine in the usual manner but requires no external wrapping. The cellulate space incidental to the corrugated core 3 creates a thermo-insulating wall due to the dead air space.

Having thus described this invention, what is claimed and desired to secure by Letters Patent is:

1. A box having a cover, the walls of said box being internally scored adjacent the upper edges and adapted to form an encircling inclined flange, the flange being cut away at the corners of the box and forming meeting ends adapted to normally hold the flange inclined at an angle to the under plane of said cover and forming a continuous line contact therewith.

2. A box and a cover therefor having inner and outer interspaced sheets adapted to form air insulated enclosing composite walls; an inclined flange encircling the upper edge of the box and having only a corner of its edge in contact with the under plane of said cover, the cut angle of said flange at the corners being arranged to maintain the angular inclination of said flange with respect to said cover.

CLARENCE H. WALKER.

Images