US1593668A - Fourdrinier wire - Google Patents

Description

FOURDRINIER WIRE Filed March 5. 1925 INVENTOR Patented July 27, 1926.

uirao STA This invention relates to improvements lin wire fabrics sueltas are used on Fourdrinier paper making machines and its object is to lmprove such fabrics-and to provi'de a Fourdrinier Wire of greater strengthA and of longer vwearing quality than those heretofore available.

y Another object of the invention is to pro- 1 viole a Fourdrinier wire with strengthening El@ elements which do not interfere with its) required drainage'characteristics. v

These and otherobjects will a pear fro the following specification in which l will describe the ,invention and will 'point out its il@ novel features in the appended claims.

F ig. l of the drawings is a plany view of a Fourdrinier wire which is made accordin to and embodies the present invention, an

Fig. 2 is a view on a larger scale 0fa-` smallerportion of the improved fabric illustrating the novel construction thereof, the view eing a substantially plan view but showing the fabric slightly tilted in order tmore clearly show its construction. I v` The fabric when made according to my invention comprises the usual transverse wires or weft which areall of one diameter and are equally jspaced apart, and groups of a desired number of the usual longltudinal vor warpwires 11. Y r)These are also of one diameter which-may be the samel as that ofthe transverse .wires and all of themy in each group are equally spaced apart. These transverse and longitudinal lwires Jare woven in the usual way.' lln Eig. 1,1 have shown the groups of, longitudinal wires as containing four wires each, but this Y., is solely Xfor illustrating purposes, as any desired number may be used inI each group. The two of these groups shownl in Fig? 1 are designated by lthe reference t numerals 412 Y'and 13. y

' Between the proximate wires of adjacent Y groups' 'is -a space substantially twice as great as that between the other longitudinal Wires.` In these spaces are strengthening elements, each of which comprises) two wires` and 21, preferably of smaller diameter than thatv of the other wires, and these are woven into the fabric in the novel manner illustrated. The wire 20 goes overw one `of the 'transverse wires 10 and under the next one, while theJ wire 21 'goes under the' first` f application mea Match 3,

therefore, interlinked with each other and JOSEPH oNErLL, oF Pour CHESTER, NEW YORK.

, rounnmmna wma.

1925. Serial No. 12,817.

mentioned of these transverse wires and over the next one so that they alternately 55, andoppositely pass over and under adjacent f transverse wires.

l. have lfound that in order to get the desired strengthening effect, the wires 20 and l y 21 should be put together as closely as possible and they, in fact, come. in contact with each' other where they cross -between each ot' the transverse Wires. They are,

with the transverse wires. @5

'/lt is well known that the Fourdrinier wire or apron is an expensive part voft that type of machine on which they lare used` and that they arev subjected to so muchwear that theirlife is limited. I am aware of 70.'

the facty that attempts have been made to strengthen Foui'drinier wires by. providing pairs of longitudinal wires which pass alternatelyfand oppositely over and under adjacenttransverse wires but these have not 75 met the requirements of paper makers. lnl the first place, they have always been of the same diameter as` that of the otherw longitudinal wires so 4that where they are located, the wire has in it lines of undesir- 8 able thickness, which cause grooves in the paper as it is formedf. In the second place, although they have been spaced apart slightly, they interfere materially with the required drainage characteristic 'because of 85' the tact that these ysmall drainage spaces become clogged.

nMy novel construction, however, overcomes both of these diliculties vwhen the wires of the strengthening elements are made ofsmaller diameter than that of the other longitudinal wires.' It has been found in actual practice that wires made according to this invention ontlast. those heretofore available and that they are fullyas efectivej in every other particular. f t Where slight grooves in the paper yare not undesirable, it is possible to use wires in the strengthening elements'of 'the saine diameter as that of the othervlongitudinal 10o 'i `myself to the use of smaller strengthening .chine,f buta's it is also useful for bolting and straining purposes, I intend no limitations other than those imposed in the appended claims.`

What I claim is: y

1. A wire fabric comprising a plurality of transverse wires of like diameter equally spaced, v(groups of longitudinal wires of similar iarneter also equally spaced, with the Space between adjacent groups substantially double that between the. wires of the groups, and strengthening elements intermediate the groups, said strengthening elements each comprlsing a pair of wires of smaller diameter alternately oppositely J1,593,668 A J- passing over and under adjacent'transverse tially double that between the wires of the groups, and strengthening elements intermediate the groups, said strengthening elements each lcomprising a pair of wires'of smaller diameter alternately and oppositely passing over andv underladmcenlt transverse wires crossing and in contact with each other between the transverse wires.

In witness whereof, l have hereunto'set my hand this 27th dayvof February, 1925.

' JosErH'oNErLa.-

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