US1385042A - Method of and apparatus for waxing paper - Google Patents

Description

J. DECKER AND A. C. VAN SLUYS. METHOD 0F AND APPARATUS FOR WAXING PAPER.

APPLICATION FILED AUG.I9, 1920*.

Patented .Tuly T9, 1921..

2 SHEETS-SHEET l.

OOOOOOOOOOOOO J. DECKER AND A. c. VAN sLuYs.

M ETHOD 0F AND APPARATUS FOR WAXING PAPER.

APPLICATION FILED AuG.l9, 1920.

2 SHEETS-SHET 2.

A w@ .r 03%@m JOHN DECKER AND ADOLPH CHARLES VAN SLUYS, OF NASHUA, NEW HAMPSHIRE, ASSIGNORS T0 NASHUA GUMMED & COATED PAPER COMPANY, OF NSHUA., NEW HAMPSHIRE, A CORPORATION OF MASSACHUSETTS.

METHOD 0F ,AND APPARATUS FOR WAXING PAPER.

Specification of Letters fatent. Paitmhd July 19'? 119210 Application filed August 19, 1920. Serial No. 404,603.

T0 all w71 om t may coa-cern Be it known that we, JOHN DECKER, a citizen of the llnited States, and AnoLrH C. VAN SLUYs, a subject of the Queen of Holland, both residents of Nashua, in the county of Hillsborough and State of New Hampshire, have invented an Improvement inV The invention will be bestunderstood by reference to the following description when taken in connection with the accompanying illustration of one specific embodiment thereof, while its scopel will be more particularly pointed out in the appended claims.

n the drawings:

Figure 1 is a side elevation in partial section showing an apparatus embodying one form of the invention and capable of carrying out one form of the method;

Fig. 2 is an enlarged detail showing a portion of one of the suction pipes;

Fig. 3 is a cross sectional view taken through one of the suction pipes.;

Fig. 4 is a side elevation of the support for the suction pipes and their connections to the exhaust device. and

- Fig. 5 is a front elevation of the same.

Referring to the drawings and to the illustrated embodiment of the invention there selected for illustration. the machine therein shown for coating paper is ot the general type disclosed in prior patent to Carter No. 1.110,8?. This comprises a frame work 3. at one end of which there are provided sets ofibearings 7 and 9. for the shaft of a supply roll of paper 1l. any one of which sets of bearings may be employed as desired. At the oppositev end of the niachiue the paper is reeled up on a power driven winding reel (not herein shown). the paper. which is here designated as l. being wound up on the rcel and unwound from the supply roll l1 at a relatively high"` rate ofhspeed and being subjected to the intermedlate steps of waxing and finishing.

On leaving the supply roll the paper, before being subjected to the heated wax, preferably passes over a system of guiding and tensioning rolls, which are herein shown as embodied in the companion guide rolls 13 and 15, journaled on the frame work of the machine and the succeeding guide roll 17. Thence the paper passes into the Wax pan 19 which is supplied with paraiiin kept heated by any suitable means such as a steam jacket, the paper being caused to pass through the melted paraiiin at a depth which is determined by the adjustable guide roll 21. The latter is supported at opposite sides of the machine upon vertical, adjustable guides 23, each capable of vertical ad# justment through adjusting screws and a system of beveled gears 25 controlled by the hand wheel 27, so that the depth of immersion and the length of paper immersed may be adjustably controlled.

As the paper passes through the melted paraffin it becomes saturated therewith and then passes upward over the guide roll 2 9 and thence between the squeeze rolls 31 and 33, which latter act to press out and remove the surplus melted wax. These .squeeze rolls may beef any suitable construction, such as that shown in the aforesaid prior patent No. 1,140,873, provided with any suitable surface or jacket-covering and being preferably -hollow and steam heated. The upper roll is carried in bearings 35 vertically adjustable by means of the feed screw 37 and hand wheel 39 so that the pressure between the rolls may be varied. J

The paper having had the surplus wax removed next passes to the polishing rolls 41, 43 and 45. these rolls being also preferably'heated, as by providing for the ad- .mission of steam to or through them in any suitable manner, and presenting a smooth heated polishing surface to the paper. Preferably` though not necessarily, the roll Ll1 is of steel and rolls 13 and 45 of brass. all rolls being positively driven and the rolls 41. 43 and 45 being driven in the oppositel direction to the travel of the paper. rolls i3 and 45 are also carried in adjustable bearings so that the pressure thereof against the paper web may be varied. The heated The' polishing rolls 43 and 45 pressing against j the rapidly moving paper and being driven in thel opposite direction to the travel thereof impart a smooth, even, glossy finish to the wax.

In order to preserve the finish imparted by the finishing rolls, the wax should be set and hardened as quickly as possible after leaving theburnishing rolls. In the illustrated form of the' invention, the paper web on leaving the lower burnishing roll 45 is plunged into a water bath contained within the water tank47, the paper being guided in its travel through the tank by the power driven submerged rolls 49 and 51. Any suitable means are provided for driving the rolls 49-51 at the required rate of speed as well y as the squeeze rolls and remaining guide rolls, but the details of the driving mechanism form no essential part of the present invention. V A supply of cold water is maintained in the tank by any desired means and the paper web may be given an)7 required path of travel through the tank by an appropriatearrangement of the guide rolls therein. f

When the paper leaves the tank it is provided-with a hardened finished wax coating, but before being wound up on the winding reel, the surplus watermust be removed, and this should be done as quickly as possible after leaving the bath. In the illustrated embodiment of the invention, the water, instead of being blown away from the surface of the paper by the force of an air blast, is

- removed more effectively by one or more suction pipes, represented at 53 and inFig. l, bearing against opposite faces ofthe paper web. As herein shown, each suction pipe comprises a horizontally arranged fixed section suitably supported in fixed relation to the machine (the details of the support not being 'shown in Fig. l) and bearing against the face of the paper web, the contacting walls of the pipe being preferably' smooth or polished. One or both ends of the pipe section is connected with a suction pipe 57 extending to suitable air-exhaustion apparatus adapted to maintain a suction and carry away and dispose of the surplus 'moisture which is drawn into the pipe.

Each pipe is provided with suitably shaped suction orifices, which are herein shown as consisting of three rows of small spaced orifices 59, 6l and 63, the row 61 approximating the line of contact with the paper, the row 59 being just below the point of contact and the row 63 just above. Each pipe section may be and preferably is so adjusted with relation to the paper web that it presses slightly against it and tends to -defiect it somewhat from a Istraight path of travel. As the paper passes rapidly over the surface of the suction pipe (see Fig. 3) the surplus moisture is carried with it between the converging walls of the pipe and the paperand the pipe tends to remove this moisture by a mechanical wiping action, the water thus delivered to the pipe being withdrawn through the lower row of suction openings or ldropping from the pipe back into the tank. Any surplus water which passes'the lower row of openings tends to be removed through the suction orifices of the upper rows 6l and 63. lVater on the opposite side of the paper web is similarly removed by the action of the suction pipe bearing against the mechanical wiping action of the pipe itself, the effect of the latter increasing with an increase in speed.

The same suction pipes may be made 'available for different widths of paper by use of an iniperforate sleeve 65 at each end of the pipe. This sleeve is adjustable by means of the set screw 67 to different positions on the pipe so that the suction orifices extending beyond the outside limits of the paper may be closed by the sleeve.

' If desired, additional mechanical devices may be used for removing the excess moisture before the paper rea-ches the suction' device, and we haver herein shown for that purpose in Fig` l the mechanical wiping devices 69 and 71, which engage opposite sides of the paper web and tend to remove the excess water from the paper which is carried up from the tank. These wiping devices may consist of fixed, straight edged, smooth faced strips extending transversely across the paper web and in contact therewith, be-

ing preferably located and positioned so as to have somewhat an acute angle with relation to the approaching paper.

The effectiveness of the water relnoval and increased speed of production may also be assisted by the provision of some means for agitating the paper as it leaves the tank, as

by vibrating or shaking the same. To this end we have shown (diagrammatically in Fig. l) applied to opposite sides of the paper and immediately below the wipers 69 and 71 vibrating devices 73 and 75 consisting of smooth transverse rods bearing against the face of the paper and controlled by electric vibrating motors 77 and 7.9', energized through an electric circuit 81, which are adapted to impart to the vibrator rods 73 and 75 a vibration of low am litude but high periodicity. The effect o these vibrating devices is to agitate the paper as it leaves the tank, assisting in freeing from it moisture tending to cling to it but without any tendencyto damage or injure the finish of the paper.

One method of supporting and connecting the suction pipes is illustrated in Figs. 4 and 5, where the mechanical wipers 69 and 7l and the vibrating devices 73' and 7 5 are omitted,'but an additional pair of suction pipes 81 and 83 are utilized to render more effective the removal of the water. In the illustrated form of tle invention each suction pipe has its opposite ends connected to a suction box or separator 85, thev pipe communicating lwith the interior thereof, one suction box only being shown in Figs. 4 and 5. The suction pipe is rigidly iixed to the support 87 fastened to the ceiling or an overhead part of the machine frame. The upper end of the suction box is connected to theI suction pipe 57 which in turnis conf nected to the exhaust fan 89 driven from any suitable source of power, but serving to create a suction within,v the suction box andv each of the pipes communicating therewith. The lower end of the suction box is drained by the drain pipe 91 which carries the water drained from 4the paper back into the tank 47.

l/Vhile for purposes of illustration we have herein shown and described one specific embodiment of the invention, it is to be understood that the same is not limited to the details of construction herein shown or to the relative form or arrangement of parts or to the specific application thereof, but that extensive deviations may be made therefrom without departing from the spirit of the invention.

Claims.

1. The method of making wax paper which comprises first coatin the same with heated wax, then finishing the surface, then setting the wax by subjecting it tothe action of a water bath and then removing the water by suction.

2. The method of making wax paper which comprises causing the paper to travel in the direction of its' length through a bath of heated wax, then through a water bath and then into mechanical contact with a suction device.

3. The method` of /making wax paper which comprises first coating the same withI heated wax, thensetting the wax by a water bath and removing the water by a combined wiping and suction action.

4. The method of making wax paper which vcomprises first coating the same with heated wax, thenv subjecting it to the action of a waterbath, vibrating the paper to remove surplus water and removing additional moisture by suction. v

5. The method of making l wax paper heated wax and then subjecting it to a` water bath, withdrawing it therefrom and removing water by suction.

7. The method of making wax paper which comprises r'st coating the same with heated Wax, then subjecting it to the action of a water bath and then to the action of a vibrating device.

8. 1n amachine for making wax paper the combination with paper guiding, feeding means, of means for applying heated wax thereto, means for subjecting it during travel to the action of a cooling bath and a suction member for removing moisture.

9. ln a machine for making wax paper, the combination with paper guiding, .feeding means, of means for applying heated wax thereto, means for subjectin it during travel to the action of a cooling bath, and a suction member with which the paper has mechanical Contact during its travel after leaving the bath. i

10. In a machine for making wax pa er, the combination with paper guiding, fee ing means, of means for applying heated wax thereto, means for subjecting it durin travel to the action of a cooling bath, an means for removing moisture from the paper after leaving the bath, the same comprising devices contacting with opposite sides of the paper, and means 'for withdrawing the moisture by suction.

11. ln a machine formaking wax paper, the combination with paper guiding, feeding means, of means for applying heated wax thereto, means for subjecting it durin travel to the action of a cooling bath, an means for removing moisture Jfrom the paper after leaving the bath, the same comprising hollow suction members extending transversely the paper web and contacting with opposite sides thereof and provided with suction oriiices for withdrawing the moisture. 12. ln a machine for making wax paper, the combination with paper guiding, feeding means, of means forapplying heated wax thereto, means for subjecting 1t durin travel to the action of a cooling bath, and means for removing moisture from the paper comprising suction members operatively related to opposite sides of the paper web.

13. 1n a machine for making wax paper,

,the combination with paper guiding, feedmeans for removing moisture from the paper web comprising hollow suc-tion members extending transversely the paper web and bearing against opposite sides thereof, said members being provided with a series of suction orifices.

14. In a machine for making Wax paper,

y the combination with paper guiding, feeding travel to the action of a cooling bath, and means for removing moisture from the paper web, the same comprising means for vibrating the Web after leaving the bath, and pneumatic means for removing the surplus moisture.

16. In a machine formaking wax paper, the combination with paper guiding, feeding means, of means for applying heated wax thereto, means for subjecting 1t during travel to the action of a cooling bath, andA means for removing the moisture from a paper web,'the same comprising means for vibrating the sheet 0r web after it vleaves the bath and Wipin devices operatively related toopposite si es of the web.

In testimony names to this specification.

JOHN DECKER.

ADoLnH CHARLES VAN sLuYs'.

whereof we have signed our

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