US2033201A - Method of and apparatus for wrapping annular objects - Google Patents

Description

March 10, 1936. c. M. M cHEsNEY METHOD OF AND APPARATUS FOR WRAPPING ANNULAR OBJECTS Filed Nov. 7, 1932 5 Sheets-Sheet 1 :1 z: T- F:

5 Sheets-Sheet 2 i llllmlllll C. M. M CHESNEY Filed Nov. 7, 1932 METHOD OF AND APPARATUS FOR WRAPPING ANNULAR OBJECTS March 10, 193

kw Qw March 10, 1936. MacCHESNEY METHOD OF, AND APPARATUS FOR WRAPPING ANNULAR OBJECTS Filed Nov. 7, 1932 5 Sheets-Sheet 3 iii/1276x07 C/zesievMMaaCfie March 10, 1936.

c. M. MgfiCHESNEY Filed Nov. 7, 1932 5 Sheets-Sheet W I M I I I u I March 10, 1936. c, MacCHESNEY METHOD OF AND APPARATUS FOR WRAPPING ANNULAR OBJECTS 5 Sheets-Sheet Filed Nov. 7, 1932 IIIIII Patented Mar. 10, 1936 UNITED STATES METHOD OF AND APPARATUS FOR WRAP- PING ANNULAR OBJECTS Chester M. MacChesncy, Chicago, 1ll., assignor to Acme Steel Company, Chicago, 111., a corporation of Illinois Application November 7, 1932, Serial No. 641,567

29 Claims.

This invention relates to improvements in methods of and apparatus for wrapping annular objects such as coils of steel strapping or coils of wire or the like. It is common practice to wind steel strapping and wire in coil form for shipment and it is desirable to wrap these coils and other articles of ring form with covers of paper or the like in order to protect them from the weather and to facilitate the handling of them by the shipper. Because of the shape of the object, great difficulty has heretofore been encountered in wrapping articles of this form in a simple manner to provide a covering which lies in close contact with the article, and the principal object of the present invention is to provide an improved method of wrapping according to which a covering of paper or the like, which is preferably crinkled or otherwise made expansible, is wrapped in close contact with the coil or other annular object and held securely in place. Another object of the invention is to provide an improved method of wrapping coils or other annular objects according to which a fiat sheet of crinkled paper or other expansible material is provided with longitudinal fold lines and then shaped into channel form having a longitudinal curvature so that it may be readily applied to the annular object preliminary to folding the overlapping edges over each other and then sccuring the covering in place. Still another object of the invention is to provide improved apparatus for operating upon a sheet of crinkled paper or other expansible material, forming it into suitable channel shape for application to a coil or other annular object, and then pressing it into close contact with the surface of the coil or object in readiness for the application of a surrounding binder or other securing device. Other objects relate to various features of the improved method and apparatus which will appear more fully hereinafter.

The nature of the invention will be understood from the following specification taken with the accompanying drawings, in which the improved method is illustrated in connection with one form of the improved apparatus.

In the drawings,

Fig. 1 is a top plan view of one form of the improved apparatus adapted for use in operating the method of the present invention, showing a sheet of crinkled paper being operated upon thereby and reduced to channel form;

Fig. 2 is a top plan view of a fragment of the crinkled composition of paper which is preferably employed in operating the present invention, with parts thereof broken away;

Fig. 3 is an enlarged detail section through the sheet of paper taken on the line 33 of Fig. 2;

Fig. 4 shows a plan view of a section of the strip of paper which is used in forming the covering after it has been operated uponto provide it with longitudinal grooves or fold lines;

Fig. 5 shows a side elevation of the apparatus illustrated in Fig. 1, with parts thereof illustrated in vertical section;

Fig. 6 shows an enlarged vertical section taken on the line 6-6 of Fig. 5;

Fig. 7 shows an enlarged horizontal section taken on the line I-I of Fig. 1, illustrating the folded condition of the paper after it has been provided with fold lines preliminary to reducing it to curved channel form;

Fig. 8 is an enlarged detail section taken on the line 8-8 of Fig. 1;

Fig. 9 is an enlarged detail section taken on the line 9--9 of Fig. 1;

Fig. 10 shows a perspective view of a section of the covering material after it has been reduced to curved channel form by the apparatus illustrated in Figs. 1 and 5;

Fig. 11 shows a vertical axial section through a coil of steel strapping or the like supported upon a ring and having applied thereto the channel-shaped covering material illustrated in Fig. 10, preliminary to receiving the annular supporting channel illustrated in the upper part of this figure; v

Fig. 12 is a sectional view taken on the line lZ-IZ of Fig. 11, showing a top plan view of the channel-shaped covering applied to the metal coil;

Fig. 13 is a sectional view taken on the line Iii-I3 of Fig. 11, showing a bottom plan view of the channel-shaped supporting ring in which the covered coil is mounted during the latter stages of the process of wrapping;

Fig. 14 shows a vertical section through the covered coil and channel-shaped supporting ring illustrated in Fig. 11 when these have been mounted on the wrapping device by which the edges of the covering are overlapped and pressed into close contact with the coil;

Fig. 15 shows a front elevation of the apparatus illustrated in Fig. 14 from the position illustrated by the section line l5-l5 of F18. 14;,

Fig. 16 shows a vertical section through the upper part of the wrapping device illustrated in Fig. 14 when a second channel-shaped ring and coil are being applied thereto;

Fig. 17 shows a vertical section through the upper portion of the wrapping device illustrated in Fig. 14 after two channel-shaped rings having covered coils-mounted therein have been rotated to overlap the edges of the coverings and press them into close contact with the coils, and illustratingalso the step of passing binding straps around the coils for binding them together; and

Fig. 18 is a perspective view of thetwo covered coils after they have been bound together by steel straps, portions of these wrapped coils being cut away and illustrated in-section.

In Figs. 2 and 3 of the drawings there is illustrated a form of well known commercial covering material 20 which is preferably employed in the practice of the present invention, although other expansible paper or covering material may be employed. The material illustrated is known as crinkled paper and it comprises two outer layers of paper 20 which are cemented to an innerlayer 23 of burlap by means of asphalt 20 or the like which adheres to the paper and may more or less impregnate the burlap. The composition paper thus formed is compressed longitudinally and provided with a plurality of transverse wrinkles or corrugations 20 which give it a rough and crinkled form and render it expansible in a longitudinal direction when suitable pressure is exerted thereon. Any portion of the width of this paper may be expanded longitudinally independent of the remaining portions and it is well adapted to retain the expanded form into which it is put, so that it lends itself to the formation of a channel-shaped covering having a longitudinal curvature adapted to conv form to the curvature of a circular coil of steel 2s and so strapping or other annular object which is to be wrapped.

The preliminary treatment of the covering material 20 is carried out in apparatus having the form illustrated in Figs. 1, 5 and 6, comprising a table 2| supported by legs 22 which rest upon a floor or other support 23 and which are connected by longitudinal frame members 24. A long length of the wrapping material 20 is wound on a drum, as shown at 25, and this drum has trunnions 26 which are journaled in bearings 21 carried by the frame members 24 so that the wrapping material may be progressively withdrawn from the drum as it is used. As the paper is withdrawn from the drum, the first step is to provide it with longitudinal grooves or fold lines 28, as shown in Fig. 4, and these are formed by passing the paper or other wrapping material between a pair of rolls 23 and 30. The roll 29 is provided with a series of spaced annular grooves 29" and as the sheet of material 20 passes between the rolls, portions thereof are forced into these grooves by the annular V-shaped ribs or dies 30 which are carried by the roll 30, as illustrated in Fig. 6, thus compressing the wrapping material at the points where these dies and.

grooves are located and providing it with longitudinal ribs or fold lines of V-shaped cross-section which project slightly from the plane of the material. The ends of the shafts of the rolls are journaled in bearing blocks 3| mounted upon the floor 23 and these shafts are geared together at one end by gears 32. At their other ends, one of these shafts is provided with a pulley 33 which may be driven from a motor by a belt or the like so that the rolls 29 and 30 are positively driven to withdraw the paper from the drum and provide the longitudinal fold lines 28 therein,

them as the operation continues, the

After leaving the rolls 29 and 30, the paper passes upwardly and through a slot 35 which extends transversely through the end portion of the table 2|. Before being passed through this slot at the beginning of the operation, the paper is folded over, in the ,manner shown in Fig. 7, along one of the two intermediate fold lines and pap s automatically folded as it passes upwardly to the slot 35 through the action of a folding plate 36 which is secured to the table and extends downwardly therefrom along the outer edge of the slot. As the paper passes upwardly and through the slot 35, it is carried laterallyto some extent and the table 2| is offset laterally at one end, as shown in Fig. 1, in order to position the slot 35 at a point where it will receive the paper without exerting undue strain thereon other than that required to fold it in the manner shown in Fig. 7. After passing through the slot 35, the paper passes over the surface of the table and is carried into a chute 31, secured to the upper side of the table and adapted to fold the paper into channel form and also to give it a curvature longitudinally. Before reaching this chute, the paper is engaged by a plate 38 which holds that portion of the paper which lies between the two intermediate fold lines in close contact with the upper surface of the table. This plate is carried by a bracket 39 of U-shaped form which extends over the side wall of the channel which the paper has then formed and is secured to the surface of the table by screws engaging the plate 40. The channel 3'! has a bottom wall 3! and vertical parallel side walls 31 which are outwardly flared at their ends as shown at 31 in order to guide the paper into the channel. This chute 31 is curved in semicircular form at one end as shown at 31 the curvature being in a horizontal plane parallel to the upper surface of the table, and a portion of this curved part of the channel is occupied by a guide plate 42 of angular cross-section which has a horizontal flange 42 extending parallel to the bottom wall 3'! of the channel and an upwardly extending flange 42 which extends in parallel relation with and spaced from the outer wall 31 of the channel. These guide plates 42 are carried by brackets 43 which are secured to the outer walls of the channel and which have their upper portions formed as rectangular loops 43 in order to permit the outer upstanding flange of the covering strip 20 to be folded inwardly as the strip is caused to assume a curved form. The forward extremity of the flange 42 is curved inwardly in order to direct the covering material between this flange and the adjacent outer wall 3'! of the channel.

As the strip of covering material 20 is drawn over the surface of the table 2| by the mechanism hereinafter described, the side portions thereof are directed upwardly about the intermediate fold lines 28, as shown in Fig. 8, and the paper begins its travel through the chute 31 in this channel-shaped form. The paper will previously have been provided with a fold around the innermost fold line 28 and the angle-shaped guide plate 42 will serve to accentuate the fold around the outermost fold line 28 when the paper reaches the curved portion of the chute. The bottom section 20 of the covering material lies in a horizontal position on the bottom wall of the channel beneath the flange 42 of the guide plate and the section 20, next adjacent to extends vertically upward between the outer wall of the channel and the flange -42*. n the inner side of the channel, the section 2ll'of the covering strip extends vertically upward adjacent the inner wall of the channel. At the stage shown in Fig. 8, the covering material is not bent around the two outer fold lines 28 so that the edge flaps or sections 25 and 2t of the covering material continue to extend vertically upward. As the "covering material 20 passes around the curved portion 31 of the channel, the outer portion 25 thereof, which is confined between the flange 42 and the outer wall of the channel, is expanded longitudinally because it is required to pass along a path of greater length than that traveled by the section 2|) of the covering material which lies adjacent to the inner vertical wall of the channel. The covering material thus gradually assumes a longitudinal curvature and as the section 25 thereof is expanded, the outer flap or edge section 25 is automatically turned inwardly as shown at 44 in Fig. 9, due to the fact that this flap is unobstructed and is required to expand only along the lower edge thereof where it is connected to the section 25. The guide plate 42 extends through an arc of slightly more than ninety degrees and adjacent the rear extremity thereof, the outer vertical section 25 of the covering material is operated upon by a pair of rolls 45 which are mounted on vertical shafts 45 and which are provided with outer serrated or roughened surfaces 45 for engagement with the covering material. The shafts 45 are journaled in a bearing block 41 and are connected 4 to be driven in unison by gears 48 so that when to stretch and elongate the outer vertical section 25 of the covering material by drawing it around the vertical flange 42 of the guide plate but also to draw the paper through the chute over the upper surface of the table.- As the paper emerges from the mouth of the chute 31, it has assumed a longitudinal curvature and has a channel form substantially like that illustrated in Fig. 9, so that sections thereof may be cut off in the desired lengths for application to coils of steel strapping or other annular objects which are to be covered thereby. The form of this channel-shaped covering having a longitudinal curvature is illustrated particularly in Fig. 10.

In Fig. 11, a substantially circular section of the channel-shaped covering material is shown applied to a circular coil 50 of steel strapping or the like. After this coil is wound, the layers thereof are secured together and it is retained in its circular form by binding wires which are passed around the coil transversely-as shown in Fig. 12 with their ends twisted together or otherwise secured to maintain them in place. Before applying the channel-shaped covering material to the coil 55, it is placed upon a supporting ring 52, as shown in Fig. 11, with the intermediate portion of one side of the coil resting upon the comparatively narrow edge of the ring which may be secured to a table or other support 53. The curved channel-shaped covering strip 20,

having the form shown in Fig. 10, is then slipped down over the coil 50, as shown in Fig. 11, with the end portion thereof overlapping as illustrated at 54 in Fig. 12. The channel-shaped form of the covering strip then causes it to lie in close contact with three annular surfaces of the coil 50 and the edge sections or flaps 20 and 2|] of the covering strip are then adapted to be overlapped against the surface 50 of the coil which rests upon the supporting ring 52.

border to effect the folding of the flaps 25 and 20 over the surface 5|) of the coil and to .permit the binding of the wrapping about the center with a hub 51 and having adjacent its outer ends a pair of annular transversely extending flanges 55 and 59 which form an intermediate channel 50 adapted to receive the coil 50 having applied thereto the channel-shaped cover as shown in Figs. 11 and 12. The annular flanges 58 and 59 diverge slightly away from the plate 55 and they have their outer edges turned sharply away from each other so that the channel 55 is adapted to permit the ready insertion of the covered coil 55. The carrier 55 is further provided with a plurality of radially extending slots 5| which are formed in the disk 55 and which also extend through the flanges 58 and 59. These slots are enlarged at their outer ends as shown at 5!, beginning at a point adjacent the flange 55, and they extend inwardly to points slightly beyond the inner margin of the flange 55, as shown in Fig.'13. In this embodiment, three slots 5| are provided and they are adapted to permit the arrangement of steel straps or other binders around the covered coil after the flaps 2|) and 25 have been turned inwardly into close engagement with the face 50 of the coil.

After the cover has been placed on the coil 55 while the coil is positioned on the supporting ring 52, the carrier 55 is placed in position over the covered coil and then the carrier containing the coil is picked up and the hub 51 is placed upon a stub shaft 53 which projects outwardly from a pedestal 54 secured to the floor or other support. The pedestal 54 has a block 54 at its upper end in which the end of the shaft 53 is mounted and secured by a pin 55, and the shaft 53 has a slight upward inclination away from the block 54 so that the carrier 55 is automatically retained in position on the shaft after bein applied thereto. The shaft 53 has secured thereon adjacent the block 54 a disk 55 which is provided at its center with an enlarged hub portion 55 adapted to be secured either to the shaft 53 or to the block 54 in order to prevent rotation of the disk 55. This disk is provided with three radially .extending slots 51 which are adapted to register with slots 5| formed in the disk 55 of thecarrier when the carrier is in position on the shaft 53. A plurality of brackets 55 are secured to the outer edge of the disk 55 and extend therefrom parallel to the shaft 53. At their outer ends, these brackets are provided with outwardly turned flanges 55 and each flange carries a blade which is pivotally mounted thereon by a rivet 1| so that the blades may be turned to extend radially inward as shown in Fig. 15 or turned outwardly as shown by dotted lines at 12 to permit the insertion and withdrawal of the carrier 55. The blades 10 are preferably formed of spring steel or the like and they act as wipers to bear against the flanges 25 and of the channel- 5 26' and 20 extend outwardly as shown by dotted lines in Fig. 14. The operator then bends these flanges inwardly and turns the blades 16 to overlie the flanges so that they are held in engagement with the face 56' of the coil as shown by full lines in Figs. 14 and The carrier 55 is then rotated on the shaft 63 to cause the blades 10 to wipe over the surface of the outermost flange of the coil covering until these flanges have been pressed into close engagement with the coil 15 throughout the circumference of the coil. The

covered coil is then in readiness to receive the binders which retain the covering in close contact with the coil and these binders may be looped around the coil by passing them through the slots 6| and 61.

It is ordinarily desirable to bind more than one coil at a time and this may preferably be done in the manner illustrated in Figs. 16, 17 and 18. In Fig. 16, one covered coil is shown having its covering applied in close contact by the action of the blades 10 and, when this has been accomplished, another carrier 55 is placed on the shaft 63 in the reverse position, that is, with the projecting flanges 20 and 2|! of the covering extending inwardly toward the disk 66.

These flanges on this coil are then bent into contact with the inner face of the coil and the carrier 55 is pushed inwardly until these overlapped flanges of the covering bear against the outer faces of the plate 10. The carrier 55 is then swung around on the shaft 63 until the flanges 20 and 26 of the covering of the outer coil are pressed at all points into close contact with the coil, as shown in Fig. 17. The two coils are then bound together by flexible binding straps 13 or the like which are withdrawn from drums I4 arranged to revolve on shafts 15 extending at right angles to the shaft 63. A suitable length of the flexible binder is withdrawn from each drum or coil I4 and is looped around the two covered coils by passing it through one of the slots 67 in the disk 66 and thence through two of the slots 6t in the carriers and 55 which will have been rotated to bring 50 the slots 6| into alignment with each other. The

steel strapping or,other flexible binder may then be looped around the two covered coils as shown in Fig. 17 after which it is drawn taut either manually or by the use of a suitable stretching 55 tool. when the strap has been drawn taut, the

overlapping end portions thereof are united, preferably by means of a seal 11, and the outer portion of the strap is then cut off from the source of supply adjacent to the seal, which may be of the form described and claimed in the United States patent of Ralph H. Norton No. 1,260,016, dated March 19, 1918. When the binders have been drawn. taut, secured by seals, and cut off from the supply coil 14, the blades C5 10 are turned outwardly to positions such as that shown by dotted lines 12 in Fig. 15, thereby permitting the two bound and wrapped coils to be removed from the shaft 63 along with their carriers 55 and 55. These carriers may then be readily removed from opposite sides of the double coil which then has the finished appearance shown in Fig. 18.

Although one example of the improved method and one form of the improved apparatus have been illustrated and described in connection with the drawings, it will be understood that the apparatus may-be, constructed in various forms and that the method may be practiced in various ways coming within the scope of the appended I claim: a

1. The method of preparing a wrapping for an annular object which consists in taking a strip of expansible material and forming it by relative expansion of its different parts into a curved channel adapted to be subsequently fltted over the object.

2. The method of preparing a wrapping for an annular object which consists in taking a strip of expansible material and by relative expansion of its parts forming it prior to application to said object into a channel having a longitudinal curvature anda longitudinal opening girected transversely to the plane of its curvaure.

3. The method of preparing a wrapping for an object which consists in cutting a strip of material and folding it transversely to foim a channel comprising inner and outer curved portions connected at one side and open along the other side to receive the object.

4. The method of preparing a wrapping for an annular object which consists in folding a strip of expansible material along longitudinal fold lines, and expanding parts of said material prior to application to said object longitudinally of the strip to form an open channel having a longitudinal curvature.

5. The method of preparing a wrapping for an annular object which consists in folding a strip of expansible material along longitudinal fold lines, and expanding parts of said material longitudinally of the strip to form a curved channel having its opening along the lateral side' of the curve.

6. The method of preparing a wrapping for an annular object which consists in passing a strip of expansible .material endwise through dies adapted to fold said strip about longitudinal lines and to expand parts of said strip longitudinally, thereby forming a channel having a longitudinal curvature.

7. The method of preparing a cover for an annular object which consists in providing a strip of expansible material with parallel longitudinal fold lines, and then folding said material along said lines and expanding portions thereof longitudinally to form a curved channel adapted to be subsequently applied to said object.

8. The method of preparing a cover for an annular object which consists in providing a strip of expansible material with parallel longitudinal fold lines, and then folding said material along said lines and expanding portions thereof longitudinally to form a curved channel having flaps along its edges adapted to overlap when the cover hasbeen placed on the object.

9. The method of wrapping an annular object which consists in preparing a channel-shaped cover having a longitudinal curvature and a longitudinal opening directed transversely to the plane of curvature, and then passing the object sidewise into engagement with said cover through said opening.

10. The method of wrapping an annular object which consists in preparingachannel-shaped cover having a longitudinal curvature and a longitudinal opening directed transversely to the plane of curvature, then passing the object sidewise into engagement with said cover through said opening, and then securing binders transversely about said cover.

11. The method of wrapping an annular object which consists in preparing a channel-shaped covering having a longitudinal curvature and flaps along its opening adapted to overlap on one side of said object, then passing said channelshaped cover into engagement with an annular object, then pressing said flaps into overlapping relation, and then securing said flaps in said overlapped relation.

12. The method of wrapping an annular object which consists in preparing a channelshaped covering having a longitudinal curvature and flaps along its opening adapted to overlap on one lateral side of said object, then passing said channel-shaped cover into engagement with an annular object, then pressing said flaps into overlapping relation, then securing said flaps in said overlapped relation, and then securing flexible binders around said cover to hold said flaps in said overlapped relation.

13. The method of wrapping an annular object which consists in folding a strip of expansible material about longitudinal fold lines and expanding said material to form a curved channel, then placing said object in said channel, and then securing flexible binders about said cover and said object.

14. The method of wrapping an annular object which consists in folding a strip of expansible material about longitudinal fold lines and expanding parts of said material longitudinally to form a curved channel having flaps along its opening adapted to overlap, then placing a section of said channel-shaped material over said object with the end portions thereof overlapping, then pressing said flaps into overlapping relation along one side of said object, and then securing said flaps in said overlapped relationship.

15. The method of wrapping an annular object which consists in folding a strip of expansible material about longitudinal fold lines and expanding parts of said material longitudinally to form a curved channel having flaps along its opening adapted to overlap, then placing a section of said channel-shaped material over said object with the end portions thereof overlapping, then pressing said flaps into overlapping relation along one side of said object, and then passing flexible binders around said material and said object to hold said flaps in said overlapped relationship.

16. The method of wrapping annular objects which consists in forming longitudinally curved channel-shaped coverings having their openings along the sides of the curves and having flaps along said openings adapted to overlap, then placing said coverings over said objects, then overlapping said flaps on said coverings with the flaps on adjacent coverings disposed adjacent each other, and then securing the covered objects together by surrounding binders.

1'7. The method of wrapping an annular object which consists in providing a strip of expansible material with longitudinal parallel fold lines, then bending said material about said fold lines and expanding parts thereof longitudinally to form a channelhaving a side Wall with two curved walls extending at right angles thereto and flaps extending along the edges of said curved walls, then placing said channel-shaped covering over said annular object, then overlapping said flaps and pressing them into engagement with one side of said object, and then securing said flaps in said overlapped relationship.

18. The combination in apparatus for wrapping an annular object, of means for forming 19. The combination in apparatus for wrapping an annular object, of a pair of rolls having a part adapted to form a pair of longitudinal fold lines in a strip of wrapping material passing between them, die plates arranged in the form of a channel having a longitudinal curvature, and means for drawing said wrapping material through said die plates to fold it aboutsaid fold lines and elongate certain parts thereof, thereby providing a channel-shaped covering having a longitudinal curvature.

20. The combination in apparatus for wrapping an annular object, of a series of plates forming a channel having a longitudinal curvature corresponding to the curvature of said object, and means for moving a strip of wrapping material through said plates whereby said plates fold said material longitudinally and expand portions thereof to form a channel-shaped covering having a longitudinal curvature.

21. The combination in apparatus for wrapping an annular object, of an annular channel-shaped carrier adapted to receive said object with a channel-shaped covering having a longitudinal curvature applied thereto, and means for supporting said carrier and permitting rotation thereof. I

22. The combination in apparatus for wrapping an annular object, of a channel-shaped carrier adapted to receive said object with a channel-shaped covering having a longitudinal curvature applied thereto, means for supporting said carrier and permitting rotation thereof, and stationary means for pressing parts of said covering into engagement with said object during the rotation of said carrier.

23. The combination in apparatus for wrapping an annular object, of a carrier having an annular channel adapted to receive said object with a channel-shaped covering applied thereto and open along one side of said object, a support upon which said carrier may be located, and a plurality of blades carried by said support and adapted to engage said covering to press it into engagement with said object during its rotation.

24. The combination in apparatus for wrapping an annular object, of a carrier adapted to receive said object with a channel-shaped covering applied thereto with projecting portions of said covering adapted to overlap on one side of said obj ect, a support, a disk carried by said support, and means for mounting and permitting rotation of said carrier adjacent said disk, said disk and said carrier being provided with radially extending slots to permit the passage of binders around said covering and said object.

25. The combination in apparatus for wrapping an annular object, of a carrier adapted to receive said object with a channel-shaped covering applied thereto with projecting portions of said covering adapted to overlap on one side of said object, a support, a disk carried by said support, means for mounting and permitting rotation of said carrier adjacent said disk, said disk and said carrier being provided with radially extending slots to permit the passage of binders around said covering and said object, and means carried by said disk for compressing the edges of said covering into overlappi g relationship adjacent one side 01' said object.

28. The combination in apparatus for wrapping an annular object, of a carrier adapted to receive said object with a channel-shaped covering applied thereto with projecting portions of said covering-adapted to overlap on one side 01' said object, a support, a disk carried by said support, means for mounting and permitting.ro-

ject which consists in preparing a channel shaped cover of expansible material having a longitudinal curvature and a longitudinal opening directed transversely to the plane of curvature, and then passing the object sidewise into Engagement with said cover through said open- 5 28. The method of wrapping an annular object which consists in preparing a channelshaped cover 0! expansible material having a longitudinal curvature and a longitudinal open- 10 ing in its lateral side directed transversely to the plane of curvature, and then the object sidewise into engagement with said cover through said opening. I

29. The method of wrapping an annular ob- 1s ject which consists in folding and eflecting relative expansion of difl'erent parts of a sheet of expansible material to form a channel-shaped! cover having a longitudinal curvature and a longitudinal opening directed transversely to the. plane of curvature, and then passing the annular object sidewise into engagement with said cover through said opening.

CHESTER M. MAOCHESNEY. 25

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