US1221649A - Manufacture of paper cartons. - Google Patents

Description

R. FfARNOTT.

- MANUFACTURE OF PAPER CARTONS.

APPLICATION man MAR. 22.1913.

Patented Apr. 3, 1917.

2 SHEETS-SHEET 1- HHIIIFH 01% I @umkxiu. (11 115:

noEEETELEiiIne'AEivoT'n-or UPPER MONTCLAIR, NEW JERSEY, ASSIGNOR-TO I. L.

MYERS, on NEW YORK, E. Y.

MaEUEAc'rnEE 0E PAPER cannons.

To all whom it may concern."

Be it lmown that I, ROBERT F. ARNOTT, a subject of the King of Great Britain, residing at Upper Montclair, in the county of Essex and State of New Jersey, have invented a new and useful Improvement in the Manufacture of PaperCartons, of which the followin is a full, clear and exactdescription, re erence being had to the accompanying drawings, forming part of this specification, in which: f

Figure 1 is a sectional side elevation of one form of machine embodying my invention; and 1 ,Fig. 2 is a portion thereof on a 'larger scale.

Fig. 3 is a detail sectional view showing a portion of a two-ply paper band.

- My invention relates to the manufactureof paper cartons by winding paper about a mandrel and cementing it in wound form. The object of the invention is to make 3 the walls of the package stiffer and denser,

and reduce their tendency to soften in contactfwith liquid.

In the co-pending application] of C. C. Stutz and myself, No, 678,110 filed Feb. 16, 1912, we describe a machine for this purpose. In such machine, the pa er whether singleor multiple ply isfed orward and directed around the mandrel, the feeding forward being positive except for the last end passing on to the mandrel.

'I have found that the character of the package is improved if a plurality of the last wraps are pulled on to'the mandrel by the winding action thereof, as distinguished from feeding the paper forwardly on toit. This pulling action for the last wraps draws the plies together more tightly and firmly so that the walls are stiffer, the cement is more completely spread. and the tendency to soften under contact "with liquid is reduced.

In carrying out my invention, I preferably use a band ofpaper consisting of two or more plies or layers instead of .a single ply, althoughthe "invention may be' used with. a single ply; and by the words band or strip" in my claims, I intend to cover downwardly, as shown by the arrow, around the idle roller 7, and thence upward in the direction of the arrow and over the idle roller 8 at the entrance to the heated chamher 9. Within this heated chamber or box, 1t passes under the idle rollers 10, which are immersed in hot liquid paraflin contained in the tank 11. From this tank it passes between the feed rolls 1212 and thence under the cutting knife 13 to the mandrel 14. As the'strippasses from the feed rolls 12 to the mandrel 14, it rests upon suitable supports 15 and is held against the mandrel by pressure roller 16.

feed rolls 12 and the mandrel, being secured to a pivoted link 18 mounted on lever 20 fulcrumed at 21 on a rocking support 22 and guided by pin 23 moving in slot guide 24. The roller at the rear end of this lever is actuated by a'cam 25 on shaft 26, driven through belt or chain '27.

In the operation of the machine, the con tinuous strip of paper, preferably of the multiple ply or layer form, is fed through the printing rolls toprint any desired ma'tter thereon and thence passes-into the heating chamber: Here it is' supplied with or soaked in hot liquid paraflin, either by pass- Specification of Letters Patent. Patented Aplfi 3 191%.. I I Appfieatio'n filed March 22, 1913. serial Ito. 756,141.

i The cuttingknife 13 is hung between the I acertain number of turns of paper as it is wound on the mandrel. 'The feeding action of the feed rolls and printingrolls is then I stopped-while the mandrel continues to be driven." In. this manner, the mandrel will pull uponitself the rest of the wraps by drawing the paper band through the rolls and between the idle. rollers, etc.

, When the mandrel has thus wound up the desired number of turns, the knife is brought into action and'the paper out transversely. The

port on of the band back of the knife re- .mains stationary whilethe mandrel winds up the remaining end, thus forming a complete cylinder which is removed by any desirable stripping action. After the removal of the wound cylinder from the mandrel,-

the feed rolls and printing rolls automatically start again and the next length of paper is fed forward tothe mandrel and the operation repeated. 7

tomatically cut at the desired time. Thus,

in case it is desired to feed four wraps or turns upon the mandrel and pulltwo additional turns thereof-to give a cylinder of six wraps; the roll 5 may be made with its diameter four times the diameter of the mandrel, its intermittent driving gearing being arranged to give it one complete revolution and then stop, while the mandrel continues to rotate. When the printing rolls stop, the

point where the paper band will be later on cut with the knife will be in about the position marked K on the roll 5. The band orstrip will then be pulled forward by the mandrel until the point K arrives at the cutting point where it is cut. The length of paper from the point K to the point L should be equal to the length to be pulled forward, or to this length plus any number of lengths required to form a complete cylinder. A surplus may also be'provided so that the outer end may overlap the inner end by any desired amount.

In carrying out this system, I find it of advantage to slightly depress the lower feed roller 12 at about the time it ceases turning. In the form shown to carry out this movement I support the bearings of this roller on springs 28 from which bearing rods 29 extend down to the cross-bar 30. This crossbar is acted upon by cam lever 31 having a roller 32 actuated by the cam 33. This cam slightly lifts the roller end of the lever at the proper time and depresses the'roller 12 as it stops turning;

I also prefer to hold the band stationary while the knife is cutting it. For this purpose I show a slide '34 having a roller 35 actuated by cam 36. The other end of this slide has a pivotal connection with the rock lever 37 fulcrumed at 38 and having a braking surface at 39 which is adapted to press upon the band. The cam 36 is so timed that it will depress the brake against the band and while the knife is cutting the band.

Any suitable-gearing may be employed for effecting the intermittent driving of the feeding and'printing rollers 5, 6 and 12, while the rolls 5 and 6 maybe geared to each other so as to rotate'in unison. In the drawings I have shown the machine as having a main driving shaft 40 carrying a sprocket wheel '41 which drives a chain belt 42 through a chain wheel 43 on the shaft 44. This shaft 44 carries a large spur gear wheel 45 which meshes with the pinion 46 on the shaft of the arbor. The roller 5 is driven from the shaft 44 through a chain belt 47 on a chain wheel 48 carried by the shaft 49. On the shaft 49 is a mutilated gear wheel 50 which is arranged to mesh with a pinion 51 on the shaft of the printing roller 5. This shaft also carries a chain wheel 52 driving a belt 53 which in turn drives the shaft of the upper roller 12. By means of this gearing the mandrel 14 will be continuously driven while the rollers 5, 6 and 12 will be driven only when the toothed portion of the mutilated gear 50 is in engagement with the pinion 51.

Where a multiple strip or band is used, the multiple layers may be upon the same supply roll, or 'a plurality of supply rolls may be used, each'containing one layer or P y from the pulling forward of the last wrap or wraps in order to tighten and densify the walls and give a stronger, stifi'er package. Air between thelayers is more thoroughly forced out, the cementing material is more thoroughly spread among the layers, and the tendency of the package to soften under contained liquid is greatly reduced.

The number of wraps fed forward and the number of wraps pulled on the mandrel may be varied as desired, and many different forms of apparatus may be used for carr ing out this result, since I consider mysel the first in winding cartons to feed the paper forward for a part of the wraps and then pull it on the mandrel for the succeedin wraps.

1. The method of forming stiff-walled paper cans, consisting in winding directly on a mandrel a plurality of wraps of paper, and finally stlifening the wall and consolidating the previously wound layers of paper by winding one or more final wraps under a tension considerably greater than the first wraps, substantially as described.

2. The method of forming stiff-walled waterproof paper cans, "consisting in applying a waterproofing material to a strip of paper, winding a plurality of wraps of such waterproof strips directly around a mandrel, and finally stiffeningthe wall, consolidating the previously wound layers and more completely spreading thewaterproofing material by winding one or more final wraps under a tension considerably greater The advantages of my invention result 3. The method of forming stiff-walled waterproofed paper cans, consistin in satuand finally stiffening the Wall, consolidating the previously Wound layers and more completely spreading thev parafiin by Winding one or more final wraps forming the outer plies of the can under a considerable tension, substantially as described.

i In testimony whereof, I have hereunto set my hand.

ROBERT FLEMING Witnesses:

GERTRUDE C'HAPIN, HERMAN E. SUPHAN,

ARNOTT.

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