US1429928A

US1429928A - Method of and apparatus for waxing paper

Info

Publication number: US1429928A
Application number: US381706A
Authority: US
Inventors: Winthrop L Carter
Original assignee: Individual
Current assignee: Individual
Priority date: 1920-05-15
Filing date: 1920-05-15
Publication date: 1922-09-26
Anticipated expiration: 1939-09-26

Description

W. L. CARTER.

METHOD 0F AND APPARATUS FOR-WAXING PAPER.

APucATloN HLED A1AY'15,1920.

A Paflented Sept. 26, 1922.

www2@ t Patented Sept. 26, 1922..

UNiTn STATES WINTHROP L. CARTER, OIEl NASEUA, NEW HAMPSHIRE.

METHOD F AND APPARATUS FOR WAXING PAPER.

Application med may 15, 1920. seriai No. 381,706.

4the following description, in connection I with the accompanying drawings, is a specicatioii, like characters on the drawings repj resenting like parts.

This invention relates to methods of and apparatus for treating paper with paraliine or other wax, one object beingto secure a smooth even `finish while performing thex coating operation at a relativelyhigh rate of speed.

'The invention will be best understood by reference to the following description when taken in connection with the accompanying illustration of one specific embodiment thereof, while its scope will bev more par ticularly pointed out in claims.

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

F 2 is a sectional elevationtaken through one of the polishing rolls on the line 2-2 in Fig. 1.

Referring to the drawings-and to the einbodiment of the invention therein selected for illustration, the machine therein shown comprises a framework 3, at one end of whichk there are provided adjustable bearings 5 aii'd 7 for the shaft of a supply roll of paper 9, either one of which` sets of bearings may be employed, as desired. .At the opposite end of the machine there is provided the winding reel 11 driven by the driving belt 13, the paper designated as P being wound upon the reel 11 4andunwound from the supply roll 9 at a relatively high rate of speed and being subjected to the intermediate steps of waxing and finishing.

On leaving th'e 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 embodiediin the companion guide vrolls 15 and 17 journalled on the frameworkof the machine` and the succeeding guide roll 19. Thence the paper passes into the wax pan 21 which is supplied with paraiiine in a the appended melted state, kept heated by means of the steam jacket -23 supplied through the inlet and outlet pipes 25 and 27 respectively, the paper being caused to pass throughthe melted paraiine at a depth which is-determined by the. adjustable guide roll29. The latter is supported at opposite sidesv of the machine upon vertically adjustable guides 31, each vcapable of vertical adjustment through the screws 33 and a system of bevel gears 35 controlled by the hand wheel 37, so lthat the depth -of immersion and the length of the paper immersed may be adjustably controlled. y

As the'4 paper. passes through the melted paralline it becomes saturated therewith and then passes upward over the guide roll 39 and thence between thesqueeze rolls 41 and 43 which` act to press out and remove the surplus melted wax. These rollsv may be of any suitable construction, such as that shown in my prior Patent 1,140,873, and provided with any suitable surface or jacket covering, the lower roll being preferably hollow and provided with suitable means for admitting steam to the intei'ior thereof for heating it, as through the inlet pipe 45. The upper roll is carriedin bearings 47 verticallyadjustable by means of the feed screw 49 and hand wheel 51, so that the -pressure between the rolls may be varied. 1

The paper, having had the surplus wax removed, next passes to the polishing rolls 53 and 55 which are driven in the opposite direction to the travel of the paper- (as indicated by the arrows in Fig. 1) by means of the driving belt or chain 57 driven from the lower squeeze roll shaft. The polishing rolls 53 and 55 (see Fig. 2) are preferably constructed of metal, herein of brass, and present a smooth, polished, burnishing surface, preferably heated by suitable heat! ing means. Herein .the rjolls are hollow (see Fig. 2),`one end of the roll shaft passing into a suitable stationary stuffing box bearing 59 and provided with the steam pipe connection 61 which passes through the stufl'ing box into the interior of the hollow roll. Condensation is withdrawn through a suitable pipe connection with the drip opening 63 in the end of the stuiling box. I

The heated polishing rolls, pressing against the rapidly moving paper and being driven in the opposite direction to the travel thereof`r impart a smooth, even. glossy iinish to the was. To vary the pressure of the polishing rolls on the paper, one or both ot the rolls may be adjustable` the roll 55 being herein shown as mounted in bearings 'which may be vertically adjustable by means ot the screw 65 and hand Wheel 67. The steam pipe connections til and 69 to the two rolls 53 and 55 are connected to any suitable main ".71.

n order to preserve the finish imparted by the polishing` rolls, the Wax should be set andhardencd as quickly as possible after leaving the burnishing rolls and under conditions which will create no tendency to disturb the distribution of the Wax or .impair the linish imparted thereto by the polishing rolls. s-Vhere the hardening is eiiected by passing the paper through a cold water bath. if the paper is moved at a relatively `high rate of speed the motion set up in the water or the impact of the Water or the removal of the surplus Water which lis necessary before the paper car. be reeled up. or one or more of these conditions, tends to disturb the polished coating of soft yvax and to produce an uneven finish or one having a more or less mottled appearance. ln the illustrated form of my invention, the inished wax as it leaves the burnishing roll is set or hardened by cause ing the paper to travel over a smooth, hard, cooling surface which herein and preferably is in the form of a metallic roll caused to travel in the same direction with the paper and chilled or cooled by any suitable means. By this means the paper is transferred immediatelyv from the heated burnishing roll to the smooth cooling roll or rolls and the wax set or hardened without the introduction of any disturbing conditions which would tend to impair the finish which has been imparted tothe Wax while hot.

To thus set or harden the Wax, l have provided a series of cooling rolls 73 so arranged that they provide an ample surface of contact for the paper which travels around and with the rolls, as indicated in Fig. :5. the paper passing over the upper roll and thence down over .the lower rolls,

and reel l1. The rolls T3 may be driven by any suitable means but herein are driven by the belt or chain 57 which passes from the polishing roll 55 to the uppermost roll of the series` and from the lowermost roll to the lower squeeze roll shaft after passing over the idle pulley 75.

The cooling rolls 78 may be cooled also byany suitable means but herein are hollow and of a general construction similar to that shown in Fig. 2 for the burnishing rolls. To chill the rolls.r cooling Water or other fluid is introduced through a fixed from the lowermost roll to the Winding .aaaeae stufling box at the end of each roll by means of the supply pipe T7 and withdrawn through the outlet pipes T9. llihile liquid from any suitable source may be utilized, herein the same is provided by a small refrigerating plant, indicated diagrammatically at 81, driven by the electric motor 83 and connected to the feed pipes lby the supply main 85 and the return pipe 87.

'l` he cooling rolls may be constructed of any suitable material but preferably of metal with a finished or polished surface and also preferably of brass or copperplated to minimize surface condensation.

By the use of the apparatus herein shovvn` the paper may be given a high rate of travel without impairing the finish thereof and after passing over the smooth surface of the cooling rolls, which are preferably driven at the same rate of speed as the rate of travel ot the paoer. is delivered to the winding reel ll in a dry, hardened and completely finished condition. The unsupported or unguided travel of the paper is relatively short. permitting maintenance 0f a high speed of travel .vithout any vibratory movement of the paper; and, when the latter is first installed and lined up in the machine at the commencement of .i run, there is very small initial Waste as compared with the wastage of paper which( results from lining-up when a water bath is employed.

While I have herein shoivn and described for purposes of illustration one specific form of the invention` it is to be understood that the same is not limited to the specific details or relative form or arrangement of parts herein shown but that extensive devia` tions may be made Without departing from the spirit thereof.

Claims:

l. The method of waxing paper which consists in passing the same through heated wax. squeezing the surplus wax therefrom...

polishing the surface while still hot, and then immediately chilling the wax to harden the same by contact with a chilled surface moving in the same direction as thevpaper to avoid disturbing the polish.

2. vAl machine for making waxed paper having a receptacle for heated Wax. means for guiding the paper through the Wax.

means for removing the surplus wax, one or more heated polishing rolls over which the paper is passed together with means for driving the same and one or more cooling rolls for chilling the paper without disturbing the polished surface.

8. n a machine for making waxed paper the combination with means for applying heated Wax to the paper, a burnishing roll for burnishing the same while hot, means to drive the same, of one or more cooling rolls to which the paper is immediately thereafter means for introducing a cooling liquid .to ,the-

delivered and means for driving said rolls in lthe same direction as the travel of the paper.

4. In a' machine .for making waxed paper the combination with paper guiding and feeding means of means for applying heated wax thereto, a heated burnishing roll in contact with which the paper is guided, means for driving said burnishing'roll in adirecltion opposite to the travel of the paper and a cooling member having a smooth cooling surface over which the 'paper is carried from the burnishing roll.

5. In a machine for 'making waxed paper the combination with paper guiding and feeding means of means for applying heated wax thereto, a heated burnishing roll in contact vwith which the paper is guided, means for driving said burnishing roll in a direction `opposite to the ltravel of the paper and a cooling member having a smooth cooling surface over which the paper is carried from the burnishing roll, said vcooling member comprising a hollow metallic roll with means for introducing a cooling liquid to the interior thereof. A

6. In amachine for making waxed paper the combination with paper guiding and feeding means of means for applying heated wax thereto, a heated burnishing roll in contact with which the paper is guided,vmeans for driving said burnishing roll in-a -direction opposite to the travel of the paper and a cooling member having a smooth cooling surface over which the paper is carried from the burnishing roll, Asaid` cooling member comprising. a hollow metallic roll with interior therof and means for driving said roll in the same direction as the travel of the paper and at substantially the same speed therewith.

7. In a machine for waxing paperpthe combination with a receptacle for heated wax, squeeze rolls, a plurality of heated burnishing rolls, a plurality of chilled rolls, and means for guiding the paper to -pass the same first in contact with heated wax in said receptacle, next between the squeeze rolls, next in contact on one side with one burnishing roll and then on the opposite side,`

in contact with another burnishing roll, next in contact` on one side with a coolingoll and then 4on the opposite side in contact with -another cooling roll, said -burnishing rolls being driven in a direction opposite to the travel of the paper and the cooling rolls travelinggin the same direction as 'the paper s and at substantially the same speed.

8. In a machine for waxing paper, the combination with a receptacle for the heated wax, squeeze rolls, a heated burnishing member, a cooling member, -and means for guiding the paper to pass first in contact with the heated wax iii-said receptacle, next between the squeeze' rolls, then in contact with said heated burnishing member, next in contact with said cooling member, burnishing member being moved in a direc tion opposite to the travel of the paper and said cooling direction therewith.

In testimony whereof, I have signed my @fname to this specification.

WINTI-IBOP L. CARTER.

said heated eol '70 member traveling in the same