US947794A - Expanded-metal manufacture. - Google Patents

Description

f Y ff/ N. CLARK. wf-"f" l BXPANDBD 1MAL MANUPAGTUBB.

' APPLIOATIOE FILED JULY 29. 1907. 947,794.- Patentedv Feb. 1, 1910.

f x11/ua u :To z. Abw/ MME 62 /M/r mlcl l UNITED STATES PATENT essie-E.

Nonits ELMORE' CLARK, 0E PLAI'NVILLE, coNNEe'rIcUr, AssiGNoR rro THE NATIONAL METAL Fannie COMPANY, or NEW YORK, N. Y., A eonPoRATioN or NEW YORK.

To ail-Z 'whom/it may concern."

` 'Api'. 25, 1905, I have described a method of sists' in -first slitting, then expanding and i ingact-ion, however, while it elongates the strands, does not materially aii'ec't the widths 'the openings and narrow the strip. I have EXPANDED-METAL MANUACTURE.

i Be it known that I, Norms vEnMoRE CLARK, 'a 4citizen of the United States', residing at Plainville, county of Hartford, G omiecticut, have invented certain new and useful Improvements in Expanded-Metal Manufacture, of which the following as a full, clear, and exact description.-

My invention relates toA improvements in expanded metal and the art of manufacture. In finy former patent No. 788,093 dated forming expanded 'sheet metal which conthen rolling the sheet In that case the material was rolled longitudinally of the openings so that the strands were greatly clongated, and being worked cold, the. elastic lii'nit was il'iereased.- This method has its' 'advantages and the product is valuable artieul'arly where a continuous bond from Ind to vend of the strip is desirable. Such roll of the strands, and in fact does tend to close discovered that the sheet may be both' elongated andi widened by. rolling it transversely-that is,-aeross ,the narrow way of the ymesh and so -as to reduce the gave. This Icausi`ng` the? metal to ow aerosstIxe bonds so that the materia-l has greater strength to resist tearing 'at the bonds, and `:greater sti 1fness to resist collapse when tension is applied longitudinally of the strands. These advantages are attained iii-degree even when material is'rolled across the strands' as disting'uished .from lengthwise of the strands, as j1n my form'ekpatent. Longitudinal rolling seems to draw the strands together and lleloses `th'e o enings, whereas transverse -rol'ling 'takes a vantage 'of the-trusslikeornia tion of the strands 'and increases both ldimensions of the openings. -Certain `of the ad- Va'n-t'a es in method-'and product may be obtainedg by rolling punched stock, provided 'the openinvs are elongated in form and theV rolling 'is dime transversely. lVhere the di- Y Specicetion'ot Letters Patent.

Application tiled Jf'uly 29,1190?. Serial No. 386,004.

ect'io'n of lengith `of thez'o'pening's before roll-Y ing correspon s with the length of the strip,

the iinproved action and product may be secured by using two pairs of rolls having their vaxes inclined or converging forwardly in the direction of feed of the strip, so that they draw the strip forward and at the .sa-nie time stretch and smooth it laterally. Vhcn the gage of the n'iaterial is to be reduced to any great extent, vit is preferable to accomplish the reduction by stages, first passing the. Stock forward through the rolls and then backward, so as to prod-nce a more uni-A forni action and appearance.

Figure l is a plan View of a fragment of material illustrating my invention during the reducing action. Fig. 2 is a sectional View of the saine, showing fragments of rolls in the act of reduction. l The stock l, to be treated according to my improved method is illustrated 'at the left of the line Fig. Land 'after treatment by the rolls 2 and 3 the product 4:' is at the right; T he libers of the metal are drawn in the direction of the rolling action, so that the elastic limit of the nietal, especially at the bonds, is increased and the product is better qualiied to resist severe. stresses.' Re- '.ducing the gage widens the bonds and strands-in the direction of the rolling so that the product may have strands and bonds proportionately much wider than would be possiblel in thi-n fiat material by any other process. The openings in the stock are '.widened and lengthened by this process, as

before nientioned, and although the increase Patented Feb. 1, 1910.

Ain length is slight, the area. of the product is materially increased.

'Vl/'hat I claim is:-

1. The method of forming expanded metal w-hich'consists in Vfirst forming a sheet made up vof strands permanently vconnected together at intervals with openings betwcei'i 'and arranged ,so that 'the bonds and stra-nds Aare relatively stag-gered y'and then passing Athe sheet through'redueing rolls in a direction 4transverse to the llengt-h of the bonds.

2. The method of form-ing expanded sheet metal which consists in forming 'elongated openings in 'the vsheet vand then rolling down the sheet transversely to the direction of elongation of the o enings 3. The method o Vforx'ning expanded sheet `metal which consists 1n4 providing alter-` nuiely arranged elongated rpenings .in' the sheet :1nd feeding the sheet between reflui-.ing rolls transverse] to the 'elongated openings.

41;.: The metho` of forming .expanded sheet Inetnl, which consists in slitting the stock expanding it and rolling it down at right angles te the ends of the slits.y

5. The method of treating slitted sheet A metal which includes expanding it' and rollingr it transversely :ind'inerea-sing its superficial area. in two direct-ions.

` 6. The vmethod of forming expandedmetul fronr a sheethsving openings in staggered arrangement, .which includes rolling itand causing the simultaneous Widening ofthe 'j Y bonds.

Witnesses:

D. G. CLARK, RQBT. S. ALLYN.A

Nomis- ELMORE CLARK.

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