US1818180A - Gasket-shaping device - Google Patents

Description

Aug. 11, 1931. L. A. WESTON ET AL 1,818,180

GASKET SHAPING DEVICE Filed May 22, 1929 INVENTORJSL I [try/i. liszorz, 4 BY fall/7640a 0 Zi/ Z /4 35/ i 60-50% 54:51: 7 ATTORNEY.

Patented Aug. 11, 1931 UNETED STATES PATENT OFFECE LEROY A. WESSON AND LAWRENCE O. WESTON, OF ADAMS, MASSACHUSETTS GASKET-SHAPING DEVICE Application filed May 22, 1929. Serial No. 365,077.

This invention relates to an apparatus for shaping pipe-joint gaskets for use in. connection with the maintenance of sewer-gas and watertight joints between the bell-shaped end and the spigot end of adjacent sewer or gas pipes. The gasket, which is formed by the apparatus forming the subject-matter of this application, is disclosed in our copending application filed May 22, 1929, and bearing Serial No. 365,079, under the title of Gasket devices.

The primary object of the invention is to provide an apparatus which is designed to receive a flat blank of sheet material and shape the same into an annular gasket having split finger elements and adapted when formed to be placed on the spigot end of a pipe and to form on the split gasket a retaining flange and a yieldable flange for the purpose which is clearly set forth in the above-mentioned copending application.

Simplicity of construction, convenience of arrangement of parts and comparative inexpense of manufacture, are further desiderata that have been borne in mind in the production and development of this invention.

NVith these and many other objects in View, which will more readily appear as the nature ofthe invention is better understood, the same consists in the novel construction, combination and arrangement of parts shown in the accompanying drawings, in which:

Fig.1 is a perspective view of the driving assembly for driving the various movable elements of the apparatus.

Fig. 2 is a sectional view of a pair of slidable tool shaft bearings employed in connection with the invention.

V Fig. 3 is aside view of the bearings shown in Fig. 2.

Fig. 4: is a perspective view of the assembled blank retaining guide and the shaping and stamping mechanism adapted to receive the articles to be shaped and stamped.

Fig. 5 is a fragmentary side view of an additional forming mechanism employed in connection with the invention.

Fig. 6' is a front elevational view of the .i mechanism shown in Fig. 5.

Fig. 7 is a front view of the flange shaping rolls employed in the apparatus.

Fig. 8 is a perspective view of one of the blanks adapted to be shaped by the appa= ratus. 911

Fig. 9 is a perspective view of the partially coplipleted gasket as shaped by the flanging re s. V

Fig. 10 is a perspective view of the completed article, as shaped by the entire appa? ratus.

In all of the above=mentioned views, like characters of reference are employed to designate like parts throughout and a baseboard is shown at 12. This baseboard is provided as with a pair of guides 14 and 16. These guides are adjustable by virtue of the pin and slot connections 18 which" permit the guides to be moved to and from each other. The guide 16 is grooved, as indicated at 20, in while the other guide is provided with movable guards 22 for retaining a blank such as is shown at in place, between the guides.

The-baseboard 12 has a cutout portion 26 therein across which the blank, shown in '1' Fig. 8 at 80, is adapted to pass to have its opposite sides engaged by the pair of feed rolls '28 and 30. The upper roll 30 has stamped thereon in reverse relief any suitable inscription, such as Patent pending or so Patented. The blank above referred to and which is shown at 80 in Fig. 8 is formed as an elongated strip of sheet material having securing eyelets 80 and a solid portion 82. One longitudinal edge of the blank is as previously formed with a succession of lateral slits 84, which are adapted to be bent by the apparatus into theform, as shown in Fig, 9, to form the resilient flange 86. Directly behind the rolls 28 and 30 are a pair of adjustable guides 33- and 34:, similar to the guides 14 and 16 and in substantial alignment with the same.

A cutaway portion, shownat 36, is provided in the baseboard 12 behind the guides 33 and 34 and a pair of rollers (clearly shown in Fig. 7) are disposed so as to receive the stamped metal blank therebetween in the cutout portion 36. These last mentioned rollers are designated at 3.8 and 40. These rollers, 38 and 40, have horizontal contacting surfaces 42 and 44 and beveled contacting surfaces 46 and i8, respectively, adapted to receive therebetween that partof the blank which forms the resilient flange to be more fully described hereinafter. The roller 38 is provided with an annular flat side face 50 and the roller with a flange 52, having a flat inner face 54: that engages the face and receives a portion of the blank therebetween which forms on the blank an inner lateral flange 88, clearly shown in Fig. 9. The blank, as it emerges from the forming rolls 38 and 40, will take the form shown in this figure.

In order that the blank thus far shaped may be forced into a circular shaped gasket, a pair of adjustable brackets 90 and 92 are mounted directly behind the rolls 38 and 40 in any suitable manner and on any suitable support. These brackets are adjustable by virtue of the pin and slot connections 94 and 96 formed respectively between each bracket and its support. The bracket 92 is provided with a curved cam surface 92 while the bracket 90 is provided with a substantially complementary curved surface 90. The blank, as shaped by the rolls 38 and i0, is passed between these cam surfaces which engage the solid central portion of the same and impart an even curvature to the blank. As the blank emerges, it assumes the circular form of the fini shed gasket shown in Fig. 10.

The actuating machinery for the apparatus is shown in Fig. 1. This assembly comprises a drive shaft S having a gear 2 thereon and carrying the roller 38. This gear 2 meshes with an idler gear 3, suitably supported, which drives a gear 4 011 a shaft S, which shaft carries the feed roller 30. The gear 4; meshes with a gear 5 on a shaft S carrying the feed roller 28.

The shaft S carries a second gear 6 which meshes with a gear 7 on a shaft S carrying the roller 40. Thus it will be seen that the various shafts and rollers all rotate at the same speed. It, therefore, follows that the horizontal feeding surfaces of the rollers should have a common radial distance.

In order that the upper rollers 30 and 40 may have a firm grip on the blanks 80, an adjustable support for the shafts S and S is provided at 70. The support is provided with a through bolt 71 to which are vertically and ad ustablvsecured, by means of the nuts 72, a pair of bearings 73 for the shafts S and S on either side of the support 70. The support is provided with a pair of flanges 74 having adjustable bolts 75 threaded therethrough and adapted to bear against the spring 76 on the bearing 78. By screwing down on the adjustable bolt 7 5, any desired pressure of the rolls 30 and 40 may be imparted to the blank under treatment. The

rolls 528 and 38 are not adjustable, as their shafts have fixed bearings.

lVhat we claim is:

1. A device for shaping metallic gaskets from flat metal strips, comprising an adjustable guide and movable guards adapted to receive the flatstrip to be shaped, a pair of feed and a pair of strip shaping rolls at the end of the adjustable guide and said guards, adapted to receive the strip therebetween, said latter rolls each having central contacting flat surfaces of less width than the strip and angular contacting surfaces on each side of the flat central contacting surfaces to form oppositely located flanges on the flat strip, said contacting surfaces being adapted to receive the strip therebetween, means for rotating said pairs of rolls for feeding the strip therethrough to shape the same, and means comprising two adjustable brackets each having a curved surface that are spaced from eachother and located adjacent said strip rolls, for imparting a desired curvature to the strip after the same has passed through the shaping rolls.

2. A device for shaping metallic gaskets from metal strips, comprising a guide adaptcd to receive the strip to be shaped, a pair of stripshaping rolls adjacent the guide adapted to receive the strip therebetween, said rolls each having a flat central contacting surface and inclined contacting surfaces on one side of each of the central contacting surfaces, said contacting surfaces being adapted to receive the strip therebetween, means for rotating said rolls for feeding the strip therethrough to shape the same, and adjustable means comprising two brackets with curved surfaces that are spaced from each other and located adjacent said rolls for imparting any desired curvature to the strip after the same has passed through the strip-shaping rolls, said brackets having curved slots to provide means for varying the positions of the curved surfaces.

3. A device for shaping metallic gaskets from fiat metal strips, comprising a guide adapted to receive the said strip to be shaped. a pair of rolls adjacent the guide adapted to receive the strip therebetween, said rolls each having flat central contacting surfaces and inclined contacting surfaces on one side of each of the central contacting surfaces to form oppositely located flanges, said contacting surfaces being adapted to receive the strip therebetween, means for rotating'said rolls for feeding the strip therethrough to shape the same, and means comprising two members having curved surfaces and located adjacent said rolls for imparting a desired curvature to the formed strip to complete the gasket after the same has passed through the rolls.

4. A device for shaping metallic gaskets from metal strips, comprising a pair of rolls adapted to receive the strip therehetween, said rolls having centrally disposed contacting surfaces and angular contacting surfaces on both sides of the central contacting surfaces, said contacting surfaces being adapted to receive the strip therebetvveen, means for rotating said rolls for feeding the strip therethrough to form flanges on the opposite edges of the strip, and adjustable means having two spaced curved surfaces adjacent said rolls for imparting any desired curvature to the strip after the same has passed through the rolls.

5. A device for shaping metallic gaskets from metallic strips each having one of its edges previously slitted to form fingers, comprising a pair of rolls adapted to receive the strip therebetween, said rolls having central contacting surfaces to receive the unslitted edge and angular contacting surfaces on one side of the central contacting surfaces to form flanges on the edge of the strip, said contacting surfaces being adapted to receive the strip therebetween, means for rotating said rolls for feeding the strip therethrough to form said flanges, and means comprising a curved contracting throat passage adjacent said rolls for imparting a desired curvature to the strip after the same has passed through the rolls.

LEROY A. WESTON. LAWRENCE O. WESTON.

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