US1868115A - Manufacture of paper rolls - Google Patents

Description

July 19, 1932. ,a J. MULLIGAN MANUFACTURE OF PAPER ROLLS filed NOV. 17. 1 928 m. u w u r Q Q l A. 2 m n.f... Q Q O L Q Q Ihn- 9..... n Q J o a o n a U. uu+n. ||l Pil anni .|l. 3 5 2 FIG-.6

0U fOr/'7 ey Patented July 19, 1932 UNITED STATES PATENT o FFICE 1 PATRICK J'. MULLIGAN, 0F GLEN OLDEN, PENNSYLVANIA, ASSIGNOR T0 SCOTT PAPER e COMPANY, A GORLPORATON OF PENNSYLVANIA MANUFACTURE O15"A PAPER `ROLLS applicati@ inea November 1'?,4 192s. serial Nt. 320,045.

The object of my invention is to provide a method and means for the manufacture of paper rolls having a tubular core, wherein the latter is formed of an integral portion of the paper making up the roll.

Heretofore, rolls of toilet paper having tubular cores have been made by employing previously prepared cardboard tubes, placing the same upon the winding bar by hand, and then attaching the paper web to the core while being rotated. By my improvements, the employment of a cardboard tube or `any previously constructed tubular core is entirely dispensed with; and for the purpose of providing a firm tubular center or core to the paper roll, I cause the initial portions of the roll adjacent to the Winding bar or mandrel to be united, by the application of paste or glue, into a multi-ply tube and thereafter continuing to wind the paper web to the fullsize of the roll without the appli-cation of adhesive.V

In putting my invention into practice, I may employ an ordinary slitting and perfo- Arating machine such as theretofore employed in connection with the making of rolls with cardboard tubular cores, but with certainl changes comprising more particularly a cylindrical shaped mandrel or winding bar andV adhesive applying means comprising a glue or paste pot, and a transfer roll for applying the adhesive from the pot to the surface of the paper web while being rolled upon the mandrel; and` for limiting the action of the paste applying means, I provide automatic devices for bringing the paste applying means into action for a limitedperiod of time during the initial Vwinding and then removing the same out of vcontact with the paper.

As a furtherrenement of the means employed, IV prefer to provide a collapsible winding bar or mandrel, the same being made hollow with radial perforations, and in communication with a source of vacuum during -the initial rotary motion in the making of the paper roll, whereby at the start, the web ofy paper will be attached to the bar by suction and after one or more revolutions have been made, the adhesive applying means are brought into action-to insure the building up of the multi-ply tubular core. i

My improvements will 4be n better understood by reference to thedrawing, in which: Fig. l is a vertical section of a roll making` machine embodying mylimprovements, Fig; 2 is an elevation of the'adhesive pot and rolls for applying the adhesive to the paper; Fig. p

3 1s a transverse section 0f the same on line 3 3 of Fig. 2;" Fig. .4 tis a verticalv sectionA showing the mandrel or winding bar with partly formed rollsthereon, together with the means for supporting the mandrel; Fig. 5 is a transverse section 0f the mandrel, taken Online 5-5 of Fig. 4;,and'Fig. 6 is an end View of one of the finished rolls of removed from the mandrel. Describing the machine at present 1 preferred in carryingmy improved method 'into operation, the following are 'the moreimportant features. 1s the supporting mandrel or shaft for the parent paper roll from which the commercial rolls are to be made.` This parentroll may be of sufficient width lto permit its web being slit longitudinally to provide a plurality of narrower webs to be simultaneously wound mto commercial rolls, but my invention is also applicable to the making of commercial rolls from narrower webs and I, therefore, do not restrict myself to the slitting and per# forating of the paper at wound into Vthe rolls; l, however, will.y describe the construction of the machine as commercially Vused in the practice of my; invention.

2 is the main frame and 3 the time it is being 'SQL slm

The paper web W, after leaving the parentA roll, a roll member 5 constituting a part of the transverse perforating means, and .thence under the guide roll 7 to the slitter knives 9. thence over a guide roll l0, and finally tothe winding mandrel. f The perforator. comprises a rotating shaft withfour radially arranged blades, which shaft is geared Vto re-k volve at a definite speed, so that the perforating blades 8a enter transverse grooves 5a iny the roll 5. These perforationsdo not sever the web, butV simply weaken the same along passes under a guide roll 6, thence aboutV Y Y gagement after the winding operation. Thepart 11 isprovidedwith a Vsquare head 15 at transverse lines uniformly spaced along the length of the web. n

The mandrel or winding bar 13 comprises two parts 11 and 12, each having a diagonal surface which, when brought together, form a cylindrical mandrel as' will be vunderstood by reference to Figs. 4 and 5. These partsy p may be held together by a dove-tail tongue of onepart fitting into a corresponding longitudinal recess in the other part, as is clearly shown at 14 in Fig. 5. This construction will permit the mandrel yto be collapsed for disenone end,which is adapted to engage a suitable driving Ameans 15m usually. of :a character knownas a frictional drive. The opposite P end/'of the other member'12 of the mandrelis Y provided with a tubular journal 1 6, which may be Vjournalled ina bearing 17 pivoted atv orV on a vertical axis at 17 a. Furthermore, the lmembers 11 and 12 of the mandrel are made hollow andprovided with radial apertures 11a and; 12a respectively, Furthermore, the communicating walls between the y two parts 11y and 12Varealso perforated at14a. Y

fItwill be understood that the tubular shaft 16V of the mandrel part`12is provided with a transverse lai'ierture 18 openinginto a hollow'journal 17 providing chamber about said opening-18 and havingran extension19 leadi'ngto a source of vacuum by which a. suction may be exerted throughthe parts11 andv 12 of the mandrel for'holding the free end ofthe paper web to theinandrel v during the initial winding operation and preliminary to' the application of ,thelad-hesive.,V To disen'gagevthe mandrelfrom the machine,v it is only necessary to move it to the right (Fig. 4) to ydiseng'age the driving, end 15 and swinging said mandrel clear ofthe driving means 150:, and vthereafter withdrawing the mandrel longitudinally from the bearing 17. Byv employing a vacuum for initially holding the paper web to the mandrel, the adhesive or glue Vto be applied to the Vpaper is prevented* from -getting upon the mandrel itself, and

thereby attaching the paper roll to the mandrel; and thisis quite important in com- T'he cementor glue may be applied-to the rotating paper Iweb during thefinitial rotation of the mandrel, and as a convenientr means for accomplishing this purpose, I'have employed thefollowing instrumentalities: 20 is a glue pot, 21 is an adhesive applying roll forll-direct-ly :applying 'adhesive to ythe'paper web, and to prevent the adhesive spreading beyond the paper by `an excess of the same, I prefer to .form theapplying roller 21 with points orV projections 2lb from its outer surface,so .that the adhesive is applied to the paper at a large number of points, each of which is more or less isolated from the other,

^ portions. Y

Considering my invention from'the stand- 21a is la transfer roller which extend-s. into the pot 2O and transfers adhesive from the otto thev points lorprojections on the roll 21 and which prints the adhesive in points or spots upon the paper web. VThe pot 2,0 is ar.- ranged to be moved toward and from the mandrel 13, and to accomplish this, I support the pot upon a lever 22 having a pivot or fulcrum point 23. The. opposite end of the lever 22 is actuatedby a cam 24 which, when in contact with the lever, causes the pot to be raised and the adhesive applied to the aper web about the mandrel. y

The cam 24 is of such shape that it will hold the adhesive applying means in operative relation to the mandrel and the paper web being acted on thereby during a given number of preliminary rotating movements lof the mandrel, and thereafterv cause said means to remain out of action during the completion of the roll. rIhe cam 24 may be rotated by a worm and worm wheel 'gearing 25 which, in turn, may be driven by"a shaft l26, Vand said shaft driven from the shaft of cylinder 5 by suitable worm' and Vworm wheel gearing 27. In this manner, the roll 21 is Vmoved to apply adhesive-to the Yweb for a denite number of revolutions of the man? Fig, 6, showing an fend view application of the adhesive and for-ming the roll of toilet paper proper.,V

As the core is formed from the web itself, there is no uncertainty "as to its location, as is the case where the tubular cores previously made have to be positioned uponthe man-` drel, and, therefore, my inventionlends itself excellently to the manufacture of commercial rolls where a number of said'rolls Yare simultaneously wound upon the same Y mandrel after the parent web has been split into'agplurality of webs of lesser width; *l

The character of the adhesiveemployed should be a quick dryingone, and the amount' of paper required to make Ethe tubularstructure is about one hundred y.and 'twenty-live inches and the core may be thirty ply or ther'eabout, but I do not limit myself to these'pro- 'point of economy in the manufacture of roll toilet paper, the making of the core in the manner herein described eliminates the following costly and troublesome features heretofore existing; namely, the costly tube making machinery, the cost of special tube board, excessive quantities of glue and glue preparing apparatus, tube choppers, tube board slitters, intricate tube conveyors to roll machines, tube hoppers for containing the tubes for roll machines, and elimination of the operation of putting tubes on winding bars by the roll machine operators. My invention further causes less Wear and tear on the winding bars or mandrels by eliminating the necessity of placing the bars on end into supporting sockets extending below the floor, and the elimination of the steel supporting floor sockets, also of the entire tube making and operating labor force, and in addition to the foregoing, the gain of the additional and cleaner factory floor space due to the elimination of all machinery connected with the making and handling of the tube elements.

Furthermore, it will be manifest that the simplicity of the above described method forming the subject matter of this application enables the commercial production of roll toilet paper at a considerably reducedcost and with a greater production.

No claim is made in this application to a roll of paper of the character herein described as an article of manufacture, as the said invention forms subject matter of a divisional application Serial N 0. 618,481, and filed June 21, 1932.

I have described my improved method and the article of manufacture produced thereby in connection with apparatus which I deem to be best suited to the requirements of the invention and on account of economy is preferred in commercial practice, but I do not restrict or conne myself to the minor or secondary details either as to the method of procedure or the means employed in putting it into effect, as variations therein may be resorted to as matters for the skilled artisan without aV departure from the spirit of the invention.

Having now described my invention, what I claim and desire to secure by Letters Patent 1s:

1. In means for forming an integral core and roll of paper, the combination of a mandrel upon which a web of paper is wound into a roll, with adhesive applying means movable toward and from the mandrel and having means for holding the said adhesive applying means in position for applying adhesive to the web of paper being wound upon the mandrel, whereby a limited quantity of the web may be wound upon itself in adhering relation to form a multiply core and the remainder of the Web continued to be Wound without adhesive about the said core,

and wherein further, the mandrel is provided with means for holding the beginning of the vweb to itself during the initial rotation movement prior to the application of the adhesive,- whereby the mandrel is protected against being cemented to the paper.

2. In' means for forming an integral core and roll of paper, the combination of a mandrel upon which a web of paper is wound into a roll, with adhesive applying means movable toward and from the mandrel and having means for holding the said adhesive applying means in position for applying adhesive to the web of paper-being wound upon the mandrel, whereby a limited quantity of the web may be wound upon itself in adhering relation to form a multiply core and the remainder of the web continued to be Wound without adhesive about the said core, and wherein the mandrel is made collapsible whereby it may be readily withdrawn from the finished paper roll, said mandrel provided with suction apertures about its circumference so that the paper web may be initially attached to the mandrell to enclose the same beipre the adhesive is applied tothe paper we In testimony of which invention, I hereunto set my hand.

PATRICK J. MU'LLIGAN.

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