US3275217A

US3275217A - Box with laminated corrugated collar

Info

Publication number: US3275217A
Application number: US413818A
Authority: US
Inventors: Clinton L Dornbush; Ward H Francillon
Original assignee: Georgia Pacific LLC
Current assignee: Georgia Pacific LLC
Priority date: 1964-11-25
Filing date: 1964-11-25
Publication date: 1966-09-27
Anticipated expiration: 1983-09-27

Description

p 7, 1966 c. L. DORNBUSH ETAL 3,275,217

BOX WITH LAMINATED CORRUGATED COLLAR Filed Nov. 25, 1964 2 Sheets-Sheet 1 //V|/E/VTOR5 CLINTON L.D0/?/VBU5H WARD h. FRANC/LLO/V BY ATTORNEYS Sept. 27, 1966 c. 1... DORNBUSH ETAL 3,275,217

BOX WITH LAMINATED CORRUGATED COLLAR 2 Sheets-Sheet 2 Filed Nov. 25, 1964 m w 0 TN/ o G NON WDA ATTORNEYS United States Patent Office 3,275,217 Patented Sept. 27, 1966 BOX WITH LAMINATED CORRUGATED COLLAR Clinton L. Dornbush, Palo Alto, and Ward H. Francillon,

San Jose, Calif., assignors to Georgia-Pacific Corporation, Portland, reg., a corporation of Georgia Filed Nov. 25, 1964, Ser. No. 413,818 2 Claims. (Cl. 229-37) This invention relates to a box with a laminated corrugated collar and to a novel method for its manufacture.

When boxes made of corrugated paper contain foods or other heavy material and are stacked high on top of each other, considerable pressure is exerted on the side walls of the bottom and lower boxes of the stack. One object of the present invention is to increase the stacking strength of such boxes.

Loose collars or liners have been used heretofore; a four sided strip creased to match the inside dimensions of the box has been placed loosely in a slip fit against the inside of the box to help the side walls support weight, and such strips have given a substantial increase in stacking strength, sometimes doubling it. However, the present invention distinguishes from the use of loose collars in several important ways, one of which is that the collar is laminated in place by being glued to the side walls of the carton. We have found that this lamination results in ten of twenty percent more strength than loose collars. In fact, when the invention was actually tried, a glued-in collar of the type of this invention weighing only 115 pounds per thousand square feet gave 10% more stacking strength than a loose collar that weighed 132 pounds per thousand square feet and was, therefore, in itself, stronger. The glued collar was generally of the same type of corrugated construction and its flutes were, if anything, weaker than those of the loose collar and yet, due to the laminated construction of this invention, the resulting box had substantially more strength. This novel and surprising result is obtained in a simple way which in the end results in decreasing the cost of the box in comparison with the box having a loose liner.

The novel method of this invention provides a better product at the same or lower cost. It provides a novel securing-together of the box; the collar, glued to the box blank, is offset and has a free end that is also glued to the box blank to secure the box together, both the KDF (knocked-down-flat) unit and the completed box.

Several other objects and advantages of the invention will appear from the following description of a preferred form of the invention.

In the drawings:

FIG. 1 is a view in perspective of an open box embodying the principles of the invention.

FIG. 2 is a view in perspective of a box blank with an offset liner that will form the collar, the liner being laminated in place by being glued to the box blank.

FIG. 3 is a plan view of the box in its knocked-downflat or KDF position, with portions broken away and portions shown in section.

FIG. 4 is a view in perspective of the closed box.

FIG. 5 is an enlarged view in section of a corner of the box showing how the liner holds it together.

The box of this invention incorporates a standard corrugated paper box blank 11 and uses a blank 12 to make a collar 13 of corrugated material which is glued to the box blank 11 and acts to hold the box together.

The box 10 can probably best be appreciated in reference to the novel method of its manufacture. Thus, FIG. 2 shows the blank 11, comprising corrugated doubleface paper having slots 14 dividing the bottom flaps 15 and slots 16 dividing the lid flaps 17 and having

creases

18 and 19 dividing the

flaps

15 and 17 from the side walls 20. Creases 21, in line with the

slots

14 and 16 mark the fold lines for the side walls 20. To the blank 11 is glued the flat strip 12 which at the time of gluing may be Without notches or creases but does overlie the side walls 20 from the creases 18 to the creases 19. The strip 12 is offset relative to the box blank 11, leaving a space 22 on one end and providing an overhanging flap 23 at the other end. The glue 24 (see FIG. 5) is preferably distributed Widely or fully over the mating faces of the strip 12 and the side walls 20. It does not matter whether the glue be applied to the box blank 11 or to the reinforcing strip 12.

Next, the strip 12 is creased to provide creases 21a in line with the creases 21 and slots 14 and 1-6 of the box blank 20, so that the laminated assembly can be folded. In assembling the box to its knocked-down-flat or KDF condition 25, FIG. 5, glue may be applied to the overhanging flap 23 or on the uncovered space 22 of the box wall and the box blank and strip assembly are folded so that the flap 23 is secured to the wall 20 at the space 22. Note that in the KDF position for shipping, the flap 23 is located intermediate the double-reinforced

ends

26 and 27, which are at the ends. Closure tape therefore need not be and ordinarily is not used, though it may be used, if desired.

The box 10 is readily set up in the normal manner by opening the KDF box, folding and gluing or stapling or otherwise securing the bottom flaps 15, then filling the box 10 and closing the top flaps 17 in the normal way, using glue or staples as desired.

The main walls 20 of the box 10 are substantially doubled in thickness and they are more than doubled in their ability to stand stacking, partly because the glue bond itself adds stiffness and strength to the corrugated paper as well as securing the two pieces together. By securing it together, manufacture is made simpler, because it is possible to manufacture the KDF box on an assembly line basis with the glue being applied to either the box blank 11 or the reinforcing blank 12 and then being processed by machinery from thereon, rather than having to insert each liner into the box by hand at the time that the box is set up.

To those skilled in the art to which this invention relates, many changes in construction and widely differing embodiments and applications of the invention will suggest themselves without departing from the spirit and scope of the invention. The disclosures and the description herein are purely illustrative and are not intended to be in any sense limiting.

We claim:

1. A box comprising a parallelepipedon box of double-faced corrugated paper which side walls and top and bottom flaps and a double-faced corrugated paper collar the same height as said walls and of the same perimeter as that of the Walls and glued to said walls,

said strip being offset relative to the ends of the side walls of said box, to provide a short flap bridging across the end edges of the box side walls and closing the edges of said box.

2. A reinforced box comprising a box of double-faced corrugated paper having side walls and a double-faced corrugated paper collar strip the same height as said walls and of the same perimeter as that of the walls and glued to said walls, said collar strip being offset at its ends relative to said side walls to provide a short glue flap extending across and closing the side edges of said box without increasing the thickness of any portion beyond the sum of the thickness of said side walls and a single thickness of said collar strip.

(References on following page) References Cited by the Examiner UNITED STAT ES PATENTS Jones.

Bird '22923 5 Harbeck.

Schroeder et a1. 22937 Enzie 22937 Bronte et a1. 22937 X References Cited by the Applicant UNITED JOSEPH R. LECLAIR, Primary Examiner. G. O. RALSTON, Examiner. Larson 22937 X 10 D. T. MOORHEAD, Assistant Examiner.

UNITED STATES PATENT OFFICE CERTIFICATE OF CORREC'QION Patent N00 3 27s,217 September 27, 1966 Clinton Lo Dornbush et ale It is hereby certified that error appears in the above numbered patent requiring correction and that the said Letters Patent should read as corrected below.

Column 1, line 28, for "of" read to column 2, line 53, for "which" read with o Signed and sealed this 29th day of August 1967@ (SEAL) Arum:

ERNEST W. SWIDER EDWARD J. BRENNER Attesting Officer Commissioner of Patents

Claims

1. A BOX COMPRISING A PARALLELEPIPEDON BOX OF DOUBLE-FACED CORRUGATED PAPER WHICH SIDE WALLS AND TOP AND BOTTOM FLAPS AND A DOUBLE-FACED CORRUGATED PAPER COLLAR THE SAME HEIGHT AS SAID WALLS AND OF THE SAME PERIMETER AS THAT OF THE WALLS AND GLUED TO SAID WALLS, SAID STRIP BEING OFFSET RELATIVE TO THE ENDS OF THE SIDE