US1548177A - Method of forming mountings for tubular articles - Google Patents

Description

Aug. 4, 1925. 1,548,177

} P. STRANGE METHOD OF FORMING MOUNTINGS FOR TUBULAR ARTICLES Filed' Fb. s 1924 1 and other articles, such as tubes, from fibrous Patented Aug. 4, 1925;

, 1,543,177 PATENT orr ca.

PAUL STRANGE, or NEENAH, WISCONSIN, assxenon 'ro JOHN s'rnanen mi. 0011- IANY, or mmusnn, wrsconsrma conroanmon or wrsconsm.

METHOD OF FORMING MOUNTING-S FOR, TUBULAR ARTICLES.

Application filed February 8, 1924. Serial No. 691,389.

To all whom it may concern: I

Be it known that I, PAUL STRANGE, a citizen of the United States, residing at Neenah, inthe county of Winnebago and State of Wisconsin, have invented certain new and useful Improvements in Methods of Forming Mountings for 'Tubular Articles, of which the following is a specification.

This invention relates generally to the art which includes the fabrication of receptacles the provision of an lmprovedmethod for producing articles of the sort just specified, which may be either cylindrical, conical, or of other shape, and which have the edge or margin of the peripheral wall stayed and reinforced by a wear-resisting mounting or binding which will protect the side wall, ive it additional rigidity, and, if desired, a 0rd a means of attachment for a cover or the hke.

More particularly the invention supplies an improved method for the forming of such articles, whereby the manufacture of them is simplified, a superior article is produced, cost of manufacture is decreased and uniformity in the product is obtained,

A more specific object of the invention is the improvement of such manufacture in the direction of increasing the security or firmness of attachment ofthe edge binding or mounting.

Another object is to minimize the amountv of material necessary to be employed in the binding or mounting.

A further object is the provision of a binding which is of neat and attractive appearance and which is free from irregularities or rojections which might cause injury in its andling.

Other and further objects of the invention will be pointed out hereinafter, indicated in the appended claims, or'obvious to one skilled in the art on an understanding of the present disclosure. For the purpose of this application I will describe illustrative operations and means for carrying out short of its true and most comprehensive scope in the art.

In the accompanying drawings forming part of this specification,

' Fig. 1 is a fragmentary perspective view of an article embodying a structure formed by my new process;

Fig. 2 is a broken perspective View of a hoop illustrating a step in the practice of the process constituting my invention;

Fig. 3 is a detailin the nature of a fragmentary sectional elevation through the hoop undergoing a further operation in practice of the process Fig. 4 is a similar fragmentary sectional elevation illustrating a further step in the formation of the article by means of a spinning roller, the section being taken on the diameter of the roller;

Fig. 5 is a fragmentary view showing the fashion in which the edge mounting is applied to the wall of the article prior to the securing operation, and

Fig. 6 is an elevational view, partly broken awa illustratingthe securing operation.

any articles of commerce adapted for' useas packing or shipping vessels, such as pails, mailing tubes and the like, or for other utilities, such as waste baskets, may be formed advantageously of fibrous material, such as paper'stock or board. While such material possesses the requisite stiffness and strength, it may be more or less friable on the edges, and be subjectto chipping or wear on exposed edges-incident to handling or use. It, is sometimes desirable also to provide mountings at the edges of such articles whereby closures may be aflixed to them, for example, a screw thread or lug mounting adapted for retention of a cover.

The invention provides for the production; of articles equipped with such edge mountings, and will best be understood by reference in detail to the illustrative instances resented in the drawings.

For t e purpose of an understanding of the practice of my improved method, let it be understood that I first form the body wall of the article, such as the tube or pail, in any of the customary or suitable fashions,

with the terminalmargin of the wall substantially smooth and regular. In the drawings, I designate such body portion by the reference character 10. I then form a hoop 11 of light ductile material, such as sheet metal, the same preferably being ermanently closed as by means of spotweldmg.

' The inner diameter of this hoop is as closely as possible the same as the external diameter of the body portion 10 at the terminal edge to which the mounting is to be applied. This hoop is then bent into a channel form by deflecting a portion of it inwardly. This may be effected by spinning operations illustrated in Figs. 3 and 4, wherein the hoop is placed on a spinning mandrel 12, which it closely encompasses, and spun against a roller 14, which deflects a part of the hoop. inwardly over the mandrel flange 12; then the hoop is subjected to the action of the grooved forming roller 15, which bends the marginal portion of the hoop reversely along the inner periphery of the mandrel flange. These operations have the effect of cramping the inwardly-bent portion of the hoop into a decreased circumferential extent, causing the portion which is now the inner flange 11 to assume a wavy or puckered contour as illustrated in Fig. 5. This is accomplished by virtue of the fact that the trace of the spinning roller 15 is straight, whereas the mandrel flange 12 is curved, thus increasing the clearance between the inner surface of the mandrel flange 12 and the inner flange of the roller as the middle of their overlapping portion is approached. The effect is to produce a number of protuberances 11 projecting inwardly of the hoops at intervals along the inner flange. The width of the channel between the inner and outer flanges of the hoop is determined by the width of the mandrel flange 11-, and is such that it will receive quite closely the intended margin ofthe body portion 10, as illustrated in Fig. 5. The body portion with the hoop thus in place is disposed on a mandrel 16, which closely fits the interior of the hoop and body portion, and the hoop is pressed firmly against the flange 16 of the mandrel by a clamping base 17 engaging the opposite margin of the body portion. These mountings are then rotated to spin the article against the roller 18, which applies pressure against the peripheral surface of the outer flange of the hoop. This roller 18 is applied at a desired distance from the flange 16 and under its pressure the inner and outer flanges of the hoop are forced towards each other and into the material of which the body portion 10 is formed. This has certain important effects other than merely pressing the hoop onto the body portion.

In the first place, it causes the margin of the flange 11 to bite into the material of the wall 10. This is due to the fact that in the flattening down of the protuberances 11", the flange 11*? is expanded circumferentially, which gives the marginal portion a slight outward curl toward the outer In the second place, it produces adjacent where the protuberances 11. were, slight marginal indentations 11 which bite more deeply into the material than does the major portion of the edge of the flange. The flattening of the flange 11 also has the effect of displacing some of the material outwardly across the upper edge of the body portion 10, where, by the coaction of the roller 18 with the mandrel 16 and its flange 16*, a peripheral bead 11 is formed at the outer bend of the hoop. Due to the fact that the material of the body portion 10 is to a slight degree compressible, the pressures thus exerted upon it tend to mould it in the channel thus formed at the interior 01f the bead 11". In the case of a tapered body portion, as illustrated, this operation forms the flange of the hoop to the taper of the wall, the constriction of the lower portions of the outer hoop flange being accommodated by the displacement of material therein toward the marginal bead. Asa result of the forming and application of the hoop or edge mounting in this fashion, its connection with the body portion is very secure, adapting it particularly to withstand rough usage and to function effectively as an anchorage or mounting for a closure, handle or other attachment to the article. Moreover, its connection with the body member is not such as to weaken the material thereof so as to facilitate fracture, and due to the pronounced stiffening effect exercised by the material of the bead and top of the mounting, the stability of the body portion is greatly augmented. When in place, the edges of the mounting are either pressed into, or conformed closely to the surfaces of the body portion, which is a feature of much importance in receptacles, due to the fact that it affords no opportunity for material to become caught or lodged in the mounting. The method may be carried on rapidly and with uniformity, and is applicable to articles of great variety in size and form.

It will be understood that in the illustrations the various parts have been shown in proportions designed to illustrate clearly, but not necessarily in conformity with actual practice, since the thickness of the material in the hoop and in the body portion, and the dimensions of such members are subject to variation. Any desired special forming of the external flange of the hoop, such as fluting or grooving, or the formation of threads or lugs, may be made incident to the final spinning operation, by provision of a roller of suitable form. It will be understood that as I have employed such terms as binding, edge mounting and hoop, they are intended to have a its edge is creased into the material of the 60 general significance.

What I claim is:

1. A method of forming a receptacle or the like,-which comprises providing a tubular body member having a termlnal wall margin, forming a ductile hoop of a size to encompass such margin, flanging such hoop inwardly, whereby the circumferential extent of the displaced portion is decreased, applying the hoop to the margin of the body member, and securin it thereon by expanding its inwar y flanged portion against the inner surface of the body member.

2. The method of forming areceptacle or the like, which comprises providing a body member having a terminal wall margin, forming a ductile hoop of a size to encompass the wall portion, flanging a portion of the hoop inwardly so as to form internal and external flanges, applying said hoop to the margin of the body member with said flanges on opposite sides of its wall, and securing the hoop to the body member by circumferentially expanding the internal flange while pressing the external flange toward it.

3. A process of forming tubular articles, comprising providing a body member having a terminal wall margin, forinin a duo tile hoop of a size to encom as t e body member, flanging a portion 0 the hoop inwardl to form a contracted inner flange,-

applying the hoop to the wall margin of the body member within the same, then expanding said flange circumferentially, whereby a the inwardly flanged body member.

5. A process of forming tubular articles and the like, which comprises providing a body member having a terminal wall margin, forming a ductile hoop of a size to encompass the body member, flanging a portion of said hoop inwardly so as to form opposite internal and external flanges, applying said hoop to the body member with the margin of the latter seated between said flanges, then pressing said flanges toward each other and displacing material in the hoop to form a circumferential bead at the margin of the body member. I I

6. A process of forming tubular articles and the like, which comprises providing a body member having a terminal wall margin, forming a ductile hoop of channel section, applying the hoop to the body member with the margin of the latter within the channel ofthe former, and then expanding the inner channel wall of the hoop to form an external circumferential bead about the terminal margin of the body member.

7. -A process of forming an edge binding for a tubular member which comprises the forming of a ductile hoop of a s1ze to encompass the edge portion of the meinber,

flanging a portion of the hoop inwardly to a decreased circumference, and then expanding the inwardly flanged portion outwardly to bind the marginal port1on of the tubular member between it and the exterior portion of the hoop.

8. A process of forming edge bindings for tubular members, which comprises forming a ductile hoop of a size to encompass the edge portion of the tubular member, flanging a portion of the hoop inwardly to a decreased circumference, w contracted as inward protu rances, and then depressing the protuberances to expand 1portion outwardly against the inner wall 0 the tubular mem- In testimony whereof I have hereunto signed my name. a.

' I PAUL STRANGE.

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