US2219174A - Folder - Google Patents

Description

Oct. 22, 1940. J. BERRY 2,219,174

` Fomnsml `Filed April 11, 1939 2 Sheets-Sheet 2 Patented Oct. 22, 1940 UNITED STATES PATENT OFFICE Application April 11, 1939, Serial No. 267,230

6 Claims.

This invention' relates to devices for folding the edge of a paper or similar flexible strip suchv for example as to the strip edge folding devices employed in machines for spirally winding annular objects, such as pneumatic tires, coils of wire and the like, with a stripA of paper.

VIt is anobject of the invention to provide a device of this general character which is adapted to be adjusted for folding one or both edges of strips of different width.

Another object of the invention is the provision of a folding device which is adapted to be adjusted to form folds of different widths at one or both edges of strips of different widths.

l A further object is to provide a device adapted to be adjusted to form folds at one or bothr edges of the strip in which the edge of the strip eithe-r is turned upward or downward.

A still further object is to provide a device 20 having one or all of the above mentioned features and which also is adapted to form a double fold at the edge of the strip.`

The invention will be more clearly understood from the following description in conjunction S with the accompanying drawings, in which:

- Fig. 1 is a front elevational view of a wrapping machine embodying the invention;

Fig. v2 is an enlarged detail plan viewof a portion of the same; v Y

30 Fig. 3 is an enlarged detail front elevational View of the portion of vthe machine shown in Fig. 2;

Fig. 4 is a view from the right of Fig. 3;

Figs. 5 and 6 are fragmentary detail front ele- 35 vational views of portions of the structure shown in Fig. 3;

Figs. '7, 8 and 9 aresectional views taken upon the lines 1-1, 8 8 and 9-9 of Fig. 3; and

Fig. is a perspective view of a portion of a 40. strip folded in the device of the invention.

The invention is herein illustrated as applied to a machine of well-known type for wrapping annular objects such; for example, as automobile tires, coils of wire, etc. The frame of said ma- 45 chine comprises a base I5 and a yoke I6 which is pivotally mounted on a shaft I1 journalled in an upright I8 rising from the base I5, said yoke being adjustable about the axis vof said shaft, and being secured in adjusted position by a clamp I3 50 carried by a second upright I2. The yoke I6 is provided -with guide rollers I9 for an annular shuttle on which is rotatably mounted a roll I4 of paper or other wrapping material. The shuttle 20 is rotated by a friction disk 2I secured 55 to the shaft I1 and driven by a friction pinion 22 on the shaft of an electric motor 23. The tire or other Work W to be wrapped is carried by Work supporting rollers 24 (only one of which is shown in Fig. 1) which are driven through con- 50 nections generally indicated at 25, from the Vmotor 23, the arrangement being such that the work W is turned relatively slowly lwith respect tothe speed of rotation of the shuttle 20,'so that a strip S of paper or other wrapping material is drawnv from the roll I4 and wrapped spirally about the 5 work. I l

Means is provided for applying asubstantially constant tension to the strip S as it is led from the roll I4- to the work W in o-rder to cause the strip tobe wrapped tightly and evenly about the lul work. Such means comprises a brake 26 applied to the roll-holding spindle and mechanism including a' lever 21 engaging the periphery of the roll, for automatically proportioning the force r with which the brake is applied to the diameter 1"- of the roll.

The folding device of the invention comprises a body 30 (Fig. 3) of metal shaped to have the general curvature of a section-of the shuttle 20 and having a plurality of integral posts 3| (Figs. 2U; 2, 3 and 4) projecting laterally therefrom and engaging the front surface of the shuttle 26 and secured to the latter by bolts 32.- A plate 33, providing a supporting surface over which the strip S may move freely, is secured upon the body 2o 3U by bolts 34. The plate 33 is provided along its front edge with spaced notches 36 and 31and on its rear edge with a notch 38 opposite the notch 36.

A cylindrical guide passage 39 is formed in the body 30 near its end which is adjacent the roll I4 and is adapted to receive cylindrical studs 40'Which are heldvsecurely in any'desired fadjusted position therein by set screws 4I'. A plate 42 is fixed upon the outere'nd of each' of the 35i studs 40 and projectsv upwardly therefrom above the plate 33 and serves as a guide for each of the edges of the strip S. The body 30 also is provided With a cylindrical guide passage v adjacent the notches 36 and 38 in the plate 33. Cy- 46" lindrical studs 43 and 44 extend into the guide passage 45 fro-m the front andl'rear ends thereof respectively and are held in adjusted position there-in by set screws 41. Primary strip folding elements 46 and 48`are secured to the outer ends .i5` of the studs 43 and 44 respectively and project upwardly therefrom past the edge of the plate 33. Each of the folding elements 46'and 4f!n com prises a sheet of metal folded so as to taper longitudinally and is provided with a down turned 50* portion and an upturned portion 56.

The body 30 is provided with'a third cylindri- -cal guide passage adjacent the notch 31 adapted to receive one end of a rod 6I which may be held in any desired adjusted position'therein 55T by a set screw 62. The outer end of the rod 6I is bent upwardly and curved inwardlyftoprovide a secondary folding element 63 positioned opposite the notch 31. The end of the plate 33 adjacent the folding element 63`is provided with a 60 projection 64 extending from each of its opposite edges. A shaft 66 extends between the projection 64 and carries rolls 61 which project slightly above the surface of the plate 33 and'provide a movable surface over which the strip S may be led from the strip folding device to the work W.

A disk 10 having an integral post 1I engaging the front surface of the shuttle 20 between the roll I4 and the plate 33 is secured to the shuttle by a bolt 12. A pair of spaced rods 13 and 'I4 project forwardly from the disk 10 and provide guides through which the strip S passes as it is fed over the plate 33.

Before using the folding device of the invention the position of each of the studs 40 in the guide 39 is adjusted to bring the guide plates 42 to such positions adjacent the opposite edges of the plate 33 that thespace between the plates 42 is just slightly greater than the width of the strip S which is to be folded. The position of each of the studs 43 and 44 also is adjusted in the guide slot 45 to move the folding elements 46 and 48 laterally or ina plane perpendicular to the desired positions adjacent the edge of the plate and with respect to the guide plates 42. If it is desired that eitherof the primary folding elements form a down turned fold in the edge of the strip S the folding element is adjusted in a plane perpendicular to the plate 33, as indicated by the position of the folding element 46 in Fig. 8, so-that the edge of the strip S will engage a downwardly curved portion of the folding element as it passes therethrough and be turned downward. On the other hand, ifk it is desired to fold the edge of the strip upwardly, the folding element is adjusted in a plane perpendicular to the plate 33, as indicated by the position of the follding element 4B in Fig. 8, so that the edge of the strip will engage an upwardly curved portion of the folding element as it passes therethrough. If either of the folding elements 46 and 48 is adjusted to such a position in a` plane perpendicular to the plate 33 that the edge of the strip engages the crotch of the folding element between the down turned portion 55 and the upturned portion 56 thereof, then the folding element will merely serve as a guide for the engaging edge of the strip.

The location of the primary folding elements laterally with respect to the position of the edge of the strip determines the width of the fold and the location of the edges of the strip is determined by the positions of the guide plates 42. When either of the folding elements 46 and 48 is positioned so that the edges o f the strip S engage either a down turnedor upturned portion thereof, the folding element is said' to be in an operative folding position. However, when the folding element is positioned so that the edge of the strip engages the crotch between the up turned and down turned portions thereof, the folding element is said to be in an inoperative folding position andmerely serves asa guide for the edge of the strip.

If it is desired toform a double fold at one edge of the strip, the rod 6l is adjusted to a position in the guide passage 60 such that the folding element 63 isA spaced laterally inward with respect to the folding element 46. Thus, as the previous folded edge of the strip S engages the element 63 it engages the downwardly curved portion of the element 63 and is folded inward and downward to form a double fold.

Iclaim: 1. A strip folding device' comprising A-a body having a supporting surface over which the strip may move freely, means for folding an edge of -the strip, said means being constructed to fold the edge of the strip upwardly or downwardly depending upon its position in a plane perpendicular to said surface, and means for mounting said folding means adjacent the edge of said surface for adjustment in a plane perpendicular to said surface. Y

2. A strip folding device comprising a body having a supporting surface over which the strip mayA move freely, means forfolding an edge of the strip, said means beingl constructed to fold the edge of the strip upwardly or downwardly depending upon its positionin a plane perpendicular` to said surface, and means for mounting said folding means adjacent the edge of ysaid surface for adjustment laterally of said surface and ina plane perpendicular to said surface.

3.- A strip folding device comprising a body having a supporting surface over which the strip may move freely, separate means for folding the edges of the strip, each of vsaid means being con-f structed to fold the edge of the strip upwardly or downwardlyor not at all depending upon its position in a plane perpendicular to said surface, and means for mounting each of said folding means adjacent the edge of said surface for adjustment in a plane perpendicular to said surface and laterally of said surfaceinto and out of operative folding position.

4. A strip folding device comprising a body having a supporting surface over whichthe strip may move freely, separate primarymeansfor folding the opposite edges of the strip, each of said primary means being constructed to fold the' edges of the strip upwardly or downwardly or not at all depending upon its positionin a plane Derpendicular to said surface, lmeans for mounting each of said primary folding means adjacent the edge of said surface for` adjustment in a plane perpendicular to said surface and laterally of said surface into and out of operative folding poe sition, secondary means for forminga second fold in one edge of said strip adapted` to be positioned adjacent the edge of said surface. at a. point spaced longitudinally from said primary folding means, and means for adjusting said secondary folding means laterally of said surface intoand out of operative folding position.

5. A strip folding device comprisingl abody having a supporting surface over which the strip may move freely, ya longitudinally ltapered fold-` ing element having upper and lower curvedportions extending laterally inward, and meansfor mounting said elementl adjacent anY edge ofjsaid surface for adjustment ina plane perpendicular tosaidsurface. l r l 1 y 6. A strip folding device comprising a body having a supporting surface over-which thestrip may move freely, a longitudinally tapered folding element having upper ,-and lower curved portions extending laterally inward,A :and means vfor mounting said element adjacent an edge of said surface for adjustment in va plane perpendicular to said surface and laterally thereof.

JASPER nr-tY. l

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