US2932389A

US2932389A - Package for transporting paper sheets

Info

Publication number: US2932389A
Application number: US684357A
Authority: US
Inventors: Leslie S Pearson
Original assignee: Warren SD Co
Current assignee: Warren SD Co
Priority date: 1957-09-16
Filing date: 1957-09-16
Publication date: 1960-04-12
Anticipated expiration: 1977-04-12

Description

April 1960 L. s. PEARSON 2,932,389

PACI AGE FOR TRANSPORT EEEEEEEEEEEE TS Aprl 12, 1960 L. s. PEARSON PACKAGE FOR TRANSPORTING PAPER SHEETS Filed Sept. 16, 1957 3 Sheets-Sheet 2 INVENTOR %me J w/&m

. ATTORNEY5 April 12, 1960 L. s. PEARSON Filed Sept. 16. 1957 W\ ;M N W w Hi w III N s NI W NN IM!! PACKAGE FOR TRANSPORTING PAPER SHEETS Leslie S. Pearson, Portland, Maine, assignor to S. D. Warren Company, Boston, Mass., a corporation of Massacinsetts Application September 16, 1957, Serial No. 684,357 Clains; (Cl. 206-60) This invention relates generally to a package for stacks of paper sheets and to the method of forming the same, and more particularly to the method of packaging a stack of paper sheets upon a wooden transport skid or pallet by means of four overlapping package corner sections.

In the paper manufacturing industry the packaging of stacks of larger paper sheets for shipping presents a rather serious problem due to the various types and sizes of containers which must be kept in stock in accordance with the various quantities and sizes of sheets of the customers orders. Due to the large masses and dimensions of the various paper sheet stacks, the wrapping of the sheets with a protective cover and the securing of the stacks to suitable transport skids presents rather diicult problems and great care must be 'maintained to avoid damaging the paper sheets. The present invention was developed to provide an improved method for Packaging stacks of paper sheets by the use of overlapping corner sections formed from standard pre-cut blanks wherein numerous sizes of paper sheet stacks may be packaged with only one standard size of wrapper section( Thus the primary object of my invention is to provide a method of packagng various sizes of paper sheet stacks upon a transport skid without damaging the paper sheets.

A further object of my invention is to provide a method of packaging a stack of paper sheets. upon a transport pallets by means of four overlapping package corner sections in which the extent of overlapping of the sections is determined by the size of the paper stack.

Another object of my invention is to package a stack of paper sheets upon a transport skid by means of four overlapping corner sections which are mutually secured at their overlapping portions by a pressure sensitive adhesive to form a rigid container, which container is then Secured at its lower extremities to the transport skid to form a rigid package. i

A further object of my invention relates to the method of packaging a stack of paper sheets positioned on a transport skid wherein four overlapping package corner sections are placed at the corners of the stack, said sections having tab portions which extend onto the top of the stack, adhesively securing the overlapping corner sections of the skid together to form a rigid container, securing a top piece to the tab portions of the sections under pressure to compress the 'paper sheets upon the transport skid, and simultaneously securing the lower extremities of the container to the skid to form a rigid package of the paper sheets.

'Still another object of my invention is to provide a package of paper sheets having four overlapping corner sections, a top member, and a bottom transport skid member to which the corner sections are Secured.

Other objects and advantages of my invention will become more apparent from a study of the following specification when considered in conjunction with the accompanying drawings, in which:

Fg. 1 is a perspective View of the stack of paper posi- .tioned upon the supporting skid;

States Patent' O Ice 'Figs. 2 and 3 are perspective views of the assembly steps of placing the overlapping corner panels upon the stack;

Fig. 4 is a perspective view of the package with the four corner panels and the top member positioned in place;

Fig. 5 is a perspective view of the finished package with the lower portions of the corner panels stapled to the supporting skid; and

Fig. 6 is a view of a corner panel blank.

Referring now more particularly to Fig. l, the stack 1 of standard paper sheets is positioned upon the transport skid or pallet 2 which may be of wood or other suitable inexpensive material. The skid consists of a horizontal supporting base 3 supported a distance (on the order of 8 inches) above the floor by depending vertical legs 4. The height of the paper stack is on the order of 18 to 72 inches and the dimensions of the paper sheets are on the order of 25 to 54 inches by 38 to 76 inches. The weight of the paper load is on the order of 1300 to 4600 pounds. The dimensions of the horizontal skid base 3 should approximately equal the dimensions of the paper sheets. If desired a layer 5 of heavy paper or the like may be positioned intermediate the skid base 3 and the lower surface of the paper stack to protect the lower stack sheets. A sheet 6 of solid fibre board of approximately 140 pt. having dimensions which are approximately the same as the paper sheets is positioned on top of the paper stack as shown in Fig. l.

While the sheet 6 could be of asphalt laminated corrudarnage to the paper.

Referring now to Figs. 2 and 3, the corner panels 7, 8, 9 and 10 are fitted telescopically on the corners of the paper stack. These panels are formed from a blank of oorrugated cardboard, as for example 275# test asphalt l aminated corrugated board. The panels are identical and the following description of panel 7 in Fig. 6 applies to each of the panels. sections 7a, 7b by means of a central vertical crease 7c.

Each section has a tap 7d, 7e at the upper portion there-' of connected thereto along crease lines 7f, 7g. Slot 7h separates the tabs 7d, 7e. To form the blank of Fig. 6

into the' corner configurations illustrated in Figs. 2 and` 3 the tabs 7d and 7e are folded forwardly to the hori-.

zontal plane about crease line 7c to form a right angle with respect to each other. The horizontal dimension of each of the sections 7a, 7b is somewhat greater than half the corresponding dimension of the paper sheets so that the edge of the sections will overlap pas shown in Figs. 2 and 3. A layer of pressure sensitive adhesive, such as a white lateX adhesive of high solid content and ready-to-use Vscosity emulsion is applied between overlapping section edges as illustrated by layers 7s and 9s in Fig. 2. If desired, pressure sensitive adhesive may be applied to the entire upper surface of sheet 6 so that the bent-over upper tabs will be firmly secured thereto. To obtain a successful adhesive-coated surface, the majority of adhesive solids should matt or stay on the surface of the stock so that it will be possible to eifect a satisfiactory seal when the coated surfaces are pressed together. There should. be some penetration of the adhesive into the corrugated cardboard stock to provide an anchorage of the film into the fibers, which penetration will vary somewhat with denser or less absorbent stock. Chromium plated or rubber covered roller or brush application of the adhesive -s preferred since spraying of the adhesive will tend to oxidize the latex in the adhesive i 2,932,3s9* Patented Ap The panel 7 is divided into two &932389 and ther'eby damage its cohesive characteristics. Bonding is acomplished by pressing together under prssure the overlapping portions of adjacent panels. Once the bond is made, temperature will have no effect upon it and the bond will be eifective for a period of at least one year.

After the four corner panels have been positioned as shown in Fig. 3, a layer of pressure sensitive adhesive material is applied to the upper sur-faces of the assemblage and top panel 11 is pressed downwardly 'into firm engagement with the upper surfaces of the inwardly bent tabs and the exposed central portion of the cardboard sheet 6. The top panel 11 is preferably also formed from an asphalt laminated corrugated board material and when bonded to the section flaps, serves to firmly maintain the corner panels in place.

As the top panel 11 is pressed downwardly into engagement with the assemblage, the entire skid With its assembled components is compressed, and While held under pressure metal cleats, staples or nails 12 are driven in the lower extremities of the corner panels to n'gidly secure the same to the horizontal base 3 of the skid 2.-

The top panel 11 has been thus firmly bonded into position 'and upon release of pressure a rigid paper package Secured to the skid has been formed.

In order to assist in the securernent of the top layer 11 to the assemblage of Fig. 3 it has been found to be de'sirable to cease slightly the central portions of the tabs (as for example along crease lines 7' and 7j in Fig. 6) so that upon the application of the top layer 11, the extremities of the tabs will be urged inwardly to efiect a firm engagement of the upper corners of the package with the paper sheet stack.

It will be readly apparent that the construction of the package in accordance with my invention allows for considerable variation in package size with the use of only one standard size of corner panel pre-cut blanks. For paper sheets of smaller dimensions the degree of overlapping of the corner sections will be greater than the degree of overlapping with sheets of greater dimensions. With smaller stack of paper sheets the metal cleats 12 will be driven into the skid base 3 a greater distance above the lower extremeities of the corner panels than in the case of greater stacks of sheets.

Hence it will be seen that the paper package according to my invention provides a quickly-assembled, rigid package made from relatively inexpensive materials, which package may be subject to rough treatment during transport and storage without damage to the paper sheets. -The novel package affords a much improved and superior protective wrappcr for sheet paper and when properly packaged and sealed under pressure in the correct manner, mutual slippage and creasing of the sheets during ackaging, transport and storage is avoided.

While in accordance with the provisions of the statutes I have illustrated and described the best form of embodiment of my invention 'known to me, it will be apparent to those skilled in the art that changes may be made in the form of the apparatus described without department from the spirit of my invention as set forth in the ppendd claims.

I claim:

1. A package for transporting paper sheets which comprises a wooden transport pallet having a rectangular horizontal supporting surface, a stack of paper sheets positioned on said pallet and having the same horizontal dimensions thereof, right-angled package' corner sections contiguously position'ed at the vertical corners of the stack, each of said corner sections having horizontal tab portions at the upper portions thereof folded over the horizontal upper edges of the stack, the horizontal dimensions of the legs of said corner section being greater than one half of the correspondng horizontal dimensions of the stack of paper sheets so that the edge and tab portions of adjacent corners sections overlap, pressure-sensitive adhesive means securing the overlapping edge and tab portions of adjacent sections to each other, a horizontal top member having horizontal dimensions corresponding to the horizontal dimensions of said stack of paper sheets, pressure-sensitive adhesive means securing said horizontal top member to the upper surfaces of said corner section tab portions, said corner sections having vertical dimensions greater than the height of the paper stack, and metal cleat means driven laterally into the pallet though the lower extremities of said corner sections to secure said sections to said pallet.

2. A package as defined in claim 1 wherein each of the tab portions of said corner sections is creased about a line parallel to and spaced from the associate'd horiz'ontal upper edge of the stack.

3. A package as defined in claim 1 and further including an auxliary top member positioned intermediate the upper surface of the paper stack and the lower surfaces of the horizontal tab 'portions of said corner sections, said auxiliary top member 'having horizontal dimensions corresponding to the horizontal dimensions of said paper stack.

4. A package as defined in claim 3 wherein the lower surfaces of said tabs are Secured to the upper surface of said auxiliary top member by pressure-sensitive adhesive means. y

i 5. A package as dened in claim 3 wherein said corner sections and said top members are formed from corrug'ated cardbo'ard blanks.

References Cited in the file of this patent UNITED STATES FATENTS 818,257 Kennedy Apr. 17, 1906 2,4 28,44O Waters Oct. 7 1947 2,53 5,422 Jones Dec. 26, 1950 2,567,267 Andrews Sept. 11, 1951 2,614-,689 Miller Oct. 21, 1952 2,631,723 Ellsworth Mar. 17, 1953 2,675,123 Baird Apr. 13, 1954 2.742,145 Blackburn et al. Apr. 17, 1955 FOREIGN PATENTS 484,727 Great Britain May 10, 1938