US2078959A - Paper package - Google Patents

Description

May 4, 1937. F. s. MCDONNELL 2,073,959,

PAPER PACKAGE Filed' March 4; 1935 Patented May 4, 1937 UNITED STATES PATENT rice 1 Claim.

It has been common practice heretofore to package sheets of paper on wood skids, the paper being stacked in fiat condition on the fiat top of the skid in a pile five or more feet in height. Such sheets of paper commonly run as large as 44" x 66" and occasionally even larger. Over the top of the pile has been arranged a cover or platform, the whole then being bound together as by wires passed around the assembly and with their ends secured together. The paper as thus stacked, or before being bound together, is sometimes wrapped with a waterproof wrapper. Such a package may weigh two tons or more. Whether or not a wrapper is employed, there are certain very serious disadvantages to this method of packaging. After being thus packaged for some time, particularly when the weather has been moist for a portion of the time, a considerable amount of buckling and fluting or crinkling at the end edges and dishing of the sheets is liable to occur, the amount of this buckling, fluting, crinkling, and dishing'progressively increasing toward the top of the stack. This distortion of the sheets makes their handling at the printing press particularly diificult and when successive printings are required, as in the case of color printing, this distortion of the sheets may so prevent proper registry of the paper for successive printing operations in the press that it cannot be used. This often results in return of the paper to the manufacturer.

In accordance with the present invention, however, the advantages of skid packaging are maintained, but at the same time the sheets are so packaged and protected that buckling or dishing or other distortion of the sheets is substantially prevented. This is done by placing a waterproof wrapping sheet on the'skid, stacking a fractional part or quantity of paper thereon and wrapping the wrapping sheet about the sides and ends of the paper and turning in the wrapping sheet over the top, then placing a wrapping sheet on the inturned edges of the first wrapping sheet and the top of the paper enclosed by it, superposing another quantity of paper on the second wrapping sheet, wrapping this paper about its sides and ends and with the margins of the wrapper inturned over its upper face, and in a similar manner progressively placing and wrapping successively placed portions of paper in situ until a desired quantity of paper has been placed on the skid. The top cover is then placed over the entire stack with its individually wrapped portions and the whole is bound together as by wire or other suitable binding. The individual wrapping of the fractional amounts of the paper is much more effective in protecting the paper from the effects of moisture and the effects of changes of humidity in the air, and the individual wrapping breaks up the continuity of any incipient buckling or dishing so that these faults are not per-- mitted to become accentuated from the bottom to the top as in the skid package as heretofore constructed.

The method of this invention has decided advantages over wrapping the paper in packages before placing on the skid. Separate wrapping and then placing on the skid is more costly, both in labor and wrapper material, no matter what the size of the packages may be, and requires a complete enclosing with the wrappers and the fastening of the wrappers as with sealing tape,

if the packages are to be handled at all conveniently. It is especially unsuitable in the case of large packages because of the difiiculty of handling the packages onto the skid andbecause of the tendency of such packages to break open unless wrapped in a strongerand more expensive manner than is necessary-in thecase of the new method herein described. By this lattermethod large packages may be built up upon the skid by lifting on the paper in such quantity or quantities as is most convenient and thereafter each package can be wrapped with the minimum of wrapper necessary toprotect it after it is in place without the necessity of fastening up the wrappers on the top of any package except perhaps the uppermost,

or even completely covering the top, since the weight of the package next above will hold the wrapper on the package beneath it securely in place and the wrapper on the bottom of the package next above will constitute a top sheet for the protection of the package beneath.

For a more complete understanding of this invention, reference may be had to the accompanying drawing in which Figures 1, 2 and 3 are sectional isometric views showing successive stages of packaging paper in accordance with this invention.

Figure 4 is an isometric view of the completed skid package.

Figure 5 is an end elevation showing the effects of end edge crinkling and buckling in a portion of a stack of paper made according to usual prior practice of skid packaging.

Figure 6 is a fragmentary perspective. showing the dishing of the paper in the top portion of a stack of paper built up in accordance with the prior practice for skid packaging.

Referring to the accompanying drawing, Figure 5 illustrates the end of a stack of paper such as has been piled and packaged on a skid in accordance with prior practice and has stood in packaged condition for some time subjected to humidity changes in the surrounding atmosphere. It will be noted from this figure that the lower sheets of paper along the edges, and more particularly at the ends across the grain of the paper, are somewhat crinkled and fluted, and that the amount of this distortion progressively increases from the bottom of the stack to the top where the fiuting, crinkling and buckling is very pronounced. This drawing has been made from a photograph of an actual stack of paper standing in a manufacturers warehouse.

Besides this effect of crinkling and buckling of the end edges of the paper another defect of paper packaged in this manner is illustrated in Figure 6, this also having been drawn from a photograph of the top portion of a stack of paper which has been packaged on a skid. It will be noted that the top of this stack of paper is downwardly dished in its center to a very marked de gree, the amount of dishing increasing progressively from the lower portions of the stack to the top. Very commonly both of these faults of buckling or fiuting and dishing have occurred in the same stack of paper as previously packaged on a skid.

In accordance with the present invention, however, the packaging is accomplished as shown in Figures 1 to 4. Referring to these figures, at In is indicated the usual skid on which the paper is to be packaged. On the top face of this skid is placed a wrapping sheet II as shown in Figure 1. This wrapping sheet may be made of waterproof paper such, for example, as the well known two-ply paper with an interposed protecting medium of asphalt or the like. On this wrapper H is placed a fractional quantity of the paper to be packaged as shown at l2. This may, for example, be substantially one foot high. This quantity of paper is then wrapped with the wrapper II as shown in Figure 2, the wrapper ll being brought up about the sides and ends of the paper l2 and its margins brought in over the top, as shown at l3 and I4. Next another sheet of wrapping as IE is placed over the quantity [2 of paper previously wrapped and a second quantity IE of paper is placed thereon in superposed relation to the quantity l2. The wrapper I5 is then brought up about the sides and ends of the quantity of paper IS in the same manner that the wrapper I l was brought about the sides and ends of the quantity of paper l2 and the margins of the wrapping sheet l5 are inturned over the top of the paper IS in the same manner. Where the quantities of paper may be thoroughly enclosed and protected in this manner no additional sealing is required, but if the wrapping sheets are insufficiently large to provide proper coverage, sealing strips may be applied where desirable in order to insure thorough protection. This successive packaging of fractional quantities of the paper with a waterproof wrapping is continued until the desired quantity of paper has been placed and wrapped on the skid, the wrapping in each case being performed in situ either on the skid or on the previously wrapped portions of the paper.

When the stack has been built to the desired height, a suitable cover, such as shown at 20 in Figure 4, is placed over the top of the last wrapped package and the whole is then bound together, as by wires 2|, each of which is passed across beneath the top of the skid as through holes 22 in its side rails 23, brought up along opposite sides of the stack of wrapped paper and then over a board 24 on the top or cover 20 where the ends of the wire are suitably secured together as by twisting as at 25. If desired a separate waterproofing covering sheet may be placed over the top of the topmost quantity of paper provided the cover top 20 is not sufficiently tight to give the desired protection to the top sheets of paper and, of course, if desired, the top sheet of each individual package may be similarly protected. Ordinarily there is no necessity of bringing the margins of the wrapping paper together over each quantity of paper wrapped or of the securing of them in wrapped condition, the weight of the superposed wrapper and quantities of paper being amply sufficient to hold the wrapper margins in proper position. By this method of wrapping the quantitles of paper in the several individually wrapped bundles, the paper is much better protected from the effects of moisture than where it is attempted to apply a single protective wrapper about the whole stack of paper. Moreover, the interposition of the wrapping sheets between the successively placed quantities of paper destroys any continuity of buckling, fluting or dishing heightwise of the stack so that if any slight buckling, fluting or dishing is produced in any one package, it does not continue into the paper in the package above. The quantity of paper in each successive bundle is insuflicient for any such progressive increase in buckling, fluting or dishing within itself to be troublesome in later handling of the paper in the printing press.

Furthermore, by the avoidance of fastening of the inturned edges of each wrapper other than by the weight of the superposed material, no substantial inconvenience or delay is occasioned in removing the paper for printing purposes. Due to the size of the sheets and the amount in each bundle, it is not possible to wrap the units individually and then pile them up in superposed relation on a stack for the reason that the units as thus packaged would be too heavy and at the same time too limp to permit handling in this manner, at least without great difficulty and without serious danger of so breaking the wrapper as to destroy its effectiveness.

The method of packaging described is not claimed herein, but forms a portion of the subject matter of my application Serial Number 123,809, filed February 3, 1937, for Method of packaging paper, which is a continuation in part hereof.

From the foregoing description of the invention it should be evident to those skilled in the art that various changes and modifications might be made without departing from its spirit or scope as defined by the appended claim.

I claim:

A package which comprises a skid, quantities of paper in superposed relation on said skid, wrapper sheets interposed between said quantities and wrapped about the sides and ends of the quantity of paper next thereabove and with their margins turned in beneath the wrapper sheet next above and retained in position thereby, a cover over the top of the entire stack of paper and wrapper sheets, and means binding said cover and interposed paper and wrapper sheets to said skid.

FRANCIS S. MCDONNELL.

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