[1]D STAT.ES PATFINT OFFICE. PATRICK TP.ACY TACKSON, Tn., OF CAMBRIDGE, MASSACHUSFTTS ASSIGNOI& TO PAPE]& PRODUCTS MACHINE COMPANY, OF BOSTON, MASSACHUSETTS, A CORPORATION OF XASSACHUSETTS. REINFORCED PAPER. 1,335,058. Specification of Letters Patent. Patented Mar. 30,1920. Application Aled September 9,1918. Serial No. 253,131. To all whoni it may concern: Be it known that I, PATrtlcK TRAcy JACKSIDN, Jr., a citizen of the United States, residing at Cambridge, county of Middlesex,, and State of Massachusetts, have. invented an Improvement in Reinforced @,Paper, of ivliieh the following description, in connection with the accompanyinjo,, drawings, is a @Pecificationi like characters on the draw10 ings represeiilting like parts. The invention to be hereinafter , descri6ed relates' to reinforced paper fabtics adapted for use as a prcote6ting cover or wrapper, or as an efficient material for mak15 ing bags oi- other containers. The paper fabric may be reinforced by' 'Or' of unspun fibers in substanti,,tlly their na@unral condition, and , th6 preparation 20, thereof may be@ carried into effect by.the @su I al process of soutching, hackling, draw. ing or any or all employed in the preparation of '@ ramie, hemp, sisal, flax, and otlier forms of fiber wherein the staple or length 25 of the fiber is greater than in some of the other natural fibers. It is preferable to e@mploy fibers of long staple, but it is to be understood that any natural fiber unspun or untwisted may be employed. 30 In Letters Patent, No. lp5,818, granted io P. T. Jackson, Jr., February 6, 1918, is shown des6ribed and claimed a paper fabric reinforced b spun fibers such as described above. @huenpresent application re35 lates to a paper fabric di:ffering in certain respects from that shown in said patent ,tnd a method of rnalking the fabric. In c';rrying the invention into practical ..effect,- : the fibers which have been pre-' .1, 0 *iously prepared and arranged in' substanparallel relation in the usual fiber preparing machines, are fed longitudinally to a strip of paper or other suitable material, and preferably are adhesively secured there45 to. he paper strip may be previously gummed and then moistened to secure the fibers thereto, or an adhesive coating may be applied to the paper strip ias it is fed through the machine. In some cases it may 00 be desirable to@ superpose upon the paper g trip, referred to, a second strip of paper or o ther suitable material, but this is not ind ispensable. After the unspuri fibers havo been applied t o the strip or betw,een the strips, the pres5 5 e nt inventioii conteniplates -that the illeet t hus,formed @hall be severed at ijitervals to form -sections. Then these sections are aP7 p lied to another strip bf paper or 6ther s uitable mat6rial,. which, in some instances, 6 0 may be reinforced by'unspun fibers extendir ig longitudinally Ithereof. An important f eature, of the.invention consists in applying t he sections to the strip so that the unsotin fi bers of the seci-ions extend transversely to 65 'th e length of -the strip, said sections being, p roof or other appropriate adhesive. The sec tion's may be superposed up6n the 4rip 'in end tq end relation, so--that in effect the 70 st rip imay be reinforced by unspun fibers exteh ding transversely tliereof throughout,,the l eiigth of the strip. By this method an efficieiit paper fabric may be readily and rapidly manufactured, 7 1 c omprising a strip of paper having groups o f 'transverse unspun fibers mount-ecl on a b acking, and so disposed with re-@pect to the st rip,- as to supply efficient transverse reinf oreement thereto, -and where the ungpun @8( fi bers are also, applied to the strip longl-. t udinally tliereof, an effective fabric is prov ided having i-einforeing fibers extending b oth longitudinally and tran.-,versely of the st rip. Also, the reinforcement ha(i by -these - 8 5 fi bers is desirably supplemented by the backi ng for the transveise fibers. , The character of the invention rnav be,, b est understood by ile@ference to the following d@scription of a, reinforced paper fobrio:go 'which may be made by a method conveniently prwtised in an appa-ratus shown in the acecirhpanying dm,%,ings, wherein:Figur @ 1 is a v@rtical lonkitudinal section showling conventionally the ei6@ients of an 95 apparatus for making the sections or backings having the transverse:uns pun fil)6rs applied thereto; Fig. 2 is a, veitical longitudinal section of the. portion of an apparatus having elementq loo fila,ments, in the present 'inst,,tnee, in the prefe@ably securecl to the strip by a water-
[2]1,335,058 shown c(>nventionally for applying unsp I un fibers to a strip-of paper for remlving the sections or backings; Fig. 3 is a plan of t strip of paper having the sectio-ns or backings applied thereto; Fig. 4 . is a plan of t ieinforeed paper fabric produced by the method. Fig. 5 is a. modified form of reinforeed paper ftibric which may be made by the 10 method;.and Fig. 6 on a very large seale is a sectiort taken on line 6-6 6f Fig. 5. The sections having the unspun fibers extending transversely thereof may be made 15 by any suitsbl.e means. To accomplish ihis, @in the present instance, aii a-pparatus is show in Fig. 1 of the dra-wing, com I i)rising a pair of opposed @alender rolls'land,. 3 which may be provided with ony suitable 2o driving means unnecessary Co illustrate here,iii. A strip 5 of paper or other suitable maa guide roll 9 to and between said calender rolls. This strip of paper may have a water25 proof or other suitable adhesive coating on one face thereof, whicli ma-y be, applied by passing the sti-ip between a pair of 'upper, and lower rolls 11 the lower roll being esive to ihe strip a,dapted to conduct, the, adh 30 from a, trough 13 The unspun fibers 14 may be, delivered to the paper from 9, suitable station in general panallel relation. To accomplish this, an e less belt 15 may be provi ' ded for feeding sb the fibers over a. t-able 16 to and between the calender rolls, and in the course of their transit therebetween, they are pressed to the adhesively coated ppper strip and . secu-ted thereto. 40 ' In some instances it may be, desimble to supe c a strip of thin paper or other suitable loasterial upon the fibers. To accomplish this a strip 17 of gper or other suitable material may -be led @ony a suplaly roll 19 45 over a guide roll 21, and thence to and between calender rolls, which will pi@ess the superposed strip on the fibers and into ade coatiiig on the 50 ates that be out at intervals into owtions. This may be accomplished by any suitable means, which, in the pre@ent instance, may be in the form -of a 55 cutting. roll 23. pioviaed with a knife 25 eooperating with a hard surfamd roll 26 driven by any suitable dnving means - unnecessiry to beillustrated herein. Th@ ma@terial mgy be conducted over a table 27 past 60 the cutter r6ll, artd in the course of its, tmnsit, will be severed into sections 29. These sections may be fed:6 a pair of roll,s @l @e7ond.one end of th6"tpble wbere the sections may be stacked on 9, suitable sup- 66 port 33. Any.suitable means may be provided for preparing the strip of paper or other suitable material to receive the sections produced as described. To accomplish this, iii 70 the present instance, a pair of calender rolls 35 and 37 (Fig. 2) are pr6vided driven by any suitable means. A strip of paper 39 or other suitable material may be led from a uide roll 4& t6 and be- 75 supply roll il past & g. tween the calender rolls. If unspun fibers 53 are to be applied to the paper strip 39, thev may be conducted from a suitable station by anpndless belt 54 working over a table 55 to and between the 80 calender rolls 35 and 37, which will serve to press the fibers to the adhesive coating on said p@Lper strip. Suitable means may be provided for applying a waterproof or other appropriate 85 terial 'May be led from a supply roll 7 past adhesive coating to the paper strip 39. To aecomplish tliis, the I lattei, may be fed beltween a pair of upper'and lower rolls 5'4, the lower of whicli conducts the adhesive from a trougli 59 to the, lower face of the 90 paper strip. The unspun fibers are pressed and secured by the calender rolls to the ad4esive coating on the strip. Then the sections 29 ma-y be traiisferred manually or by suitable mechanism- from the stack support 33 to the paper strip 39. The seetions riiay be conveniently applied to the p4per strip as it is fed between the calender rolls 35 and 37. For this purpose 100 an, endless belt 60 mgy be provided having a horizontal run 60a and an inclined run 60b' above the belt 54 and leading to the bight between the calender rolls, the latter serving to press,,the sectioris onto the adhesive coat105 on the paper strip.. The sections are nla ed on the strip progressilvely in end t.o p c end relation, and the ends of adjaeent seetions may meet or may have slight spaces ,between them as desired. 110 It will be understood that the -sections -may be variousl@ applied to the longitudinal strip 39. It eac@ section comprises@ merely a backin g with. fibers thereon, the section may be superposed on the strip, so that the fibers 1,5 of the secti<)n will contact with the strip or with the longitudinal fibers thereon. I so that the product will comprire outer paper layer.9 53 and 55 with IGngitudinal fibers 57 and transverse,fibers 59 betfeen said layers and 120 embedded in nn,adhesive layer 61, as will be noted in ifig. 4. If,, however, each section has a covermg strip 17 of pap@r or other suitable material, the product will comprise a pitp6r layer,63, 125 longitudinaj fibers 65, and transwrse fibers 67 between paper layers 69 and 71, the fibers 65 bein-a embedded in a'n adhesive layer 78
[3]and the fibers 67 being embedded in an adhesiv6 layer 75, as will be noted in Fig. 5. Sine,e the covering strip is preferabiy a thin tissue, it preferably will be interposed between the stron r outer paper layers 63 geand 71. It will be uiiderstood that the invention is not limited to the specific articles a ' nd method de,-,dribed herein, but that various lo deviations may be made, therefro'm without departing from the @pirit and'scopo, of the appended claims. Wha,t is
