US1350685A

US1350685A - taylob

Info

Publication number: US1350685A
Authority: US
Publication date: 1920-08-24
Anticipated expiration: 1937-08-24

Description

1. M. TAYLOR. METHOD OF PARCHMENTIZING FABRIC.

APPLICATION FILED JULY 24. 19!?- QHHHH@ I .HMHH@HH@HHHHMMH@WH@ UNITED STATES PATENT OFFICE.

JOHN M. TAYLOR, OF RADNOR, PENNSYLVANIA, AS'SIGNOR TO DIAMOND STATE FIBRE COMPANY,,OE BRIDGEPORT, PENNSYLVANIA, A GORPORATIGN OF PENNSYLVANIA.

METHOD OF PARCIEMENIIZING FABRIC.

Specification of Letters Ifatent.

Patented Aug. 24, 1920.

- Application filed July 24, 1917. Serial No. 182,452.

a process for so treating a parchmentized web or laminated parchmentized webs to remove the parchmentizing chemicals, as to avoid the objectionable results of shrinkage, which shall permit of a material shortening of the length of the washing apparatus required, and which shall permit the'amount of wash water tobe reduced to a minimum with a View to facilitating as well as cheapening its subsequent concentration.

These objects and other advantageous ends I secure as hereinafter set forth, reference being had to the accompanying draw ings, in'which,

Figure 1 is a plan to some extent diagrammatic, illustrating one form of' apparatus for carrying out my invention;

Fig. 2 is a vertical section on the line 2-2, Fig. 1, further illustrating the'apparatus preferably employed; and I i Fig. 3 is an elevation of a detail of the mechanism preferably employed in carrying out my invention. a

In the above drawings, 16 represent tanks designed to contain independent bodies of wash water. The first tank is provided with means for supporting two reels or spools 7 and 8 and likewise contains guide rollers 9, 10, 11, 12, etc, for directing a web of parchmentized materialv toor from either of saidrolls. Each of the tanks 2-6 contains a greater or less number of upper guide rollers 13 and lower guide-rollers 141,.

so arranged that a web passed around them will be alternately directed up and down through the wash water Wlthllltllflil.

The

tanks

3 and 4 respectively provide means for supporting a pair of rcels or winding rolls l5 and 16 and the tank 6 also supports a reel or roll 17 it: being understood that there may be any number of tanksor sets of tanks, ofwhich the end tanks of each set have mounted adjacent their outer ends means for supporting a reel in such position that it shall beimmediately adjacent a similar reel, at the end of an adjacent set of tanks. Any desired ineans is provided for driving any of the reels at will and while I have illustrated a system'of belts with the necessary shafts and pulleys, itis obvious that any suitable driving means or source of power may be employed for this purpose; it being noted however that such driving means should preferably include mechanism suchas the differential gear 20 wherebythe speed of each driven reel is varied or permitted to vary in accordance with the changes in the diameter of the roll of material upon it.

Under conditions of operation a web madeup of one or more thicknesses of paper or p similar material is run through a bath of parchmentizing liquid and is thereafter acted on-in the usual manner by one or more heated rollers, from which it is directed to the reel'7, for example. After any desired length of this parchmentized web has been wound upon said reel it is cut and its end coming from the heated rolls is directed to a second reel 8 upon which the winding is continued. The end of the web on the first reel is thereupon directedover suitable rolls to the guide roll 12 and thence to the first of the top rolls 13 of the tank 2, from whence it is carried successively down and up around the others of the guide rolls 14land 13-through the water in said tank, It

is then passed to the guide rolls of the tank 3 and its end is finally carried to and wound upon the reel 15 whichis turned by power.

Washwater is supplied to all of the tanks. so that the first length of the parchmentized web in passing through 'the'water in the first series of tanks, is partially freed from the parchmentizing chemicalswhich it contains, it being notedthat after the web has passed through the water it carries a certain amount of the same with it when wound reel and is applied to the latter reel so that 7 said web is drawn back from the reel 15 through the wash water in the tanks 3 and. 2. This passage of the web alternately in opposite directions through the

tanks

2 and 3 is repeated as often as is required to bring the strength of the parchmentizing solution in the web to the same or approximately the same strength as that of the wash water,

lVhen this condition is found to exist, the web is completely wound on the reel 15, from whence it is carried to the reel 16, which is then driven so as to draw said web from the reel 15. At the time a second length of web is run from the reel '4' on to the reel 8.

hen all of the first length of web has been wound upon the reel 16, it is led over the first of the upper rollers 13 of the tank 4 and thence successively around the other lower and upper rollers in this and in the tanks 5 and 6, until its end is connected to the spindle of the reel 17. These last three tanks are likewise filled with wash water and obviously the movement through them of the partly washed web causes further amounts of the remaining parchmentizing chemicals to be removed therefrom.

As in the case of the first washing, when practically all of this first web has. been wound upon the reel 17, the latter is disconnected from the source of power and the reel 16 is driven so as to draw back the web through the wash water in the tanks 6, 5 and 4. This operation is repeated until the strength of the parchmentizing solution throughout the body of the web is substan tially the same as that of the wash water in these tanks.

At the same time a second length of web from the parchmentizing tanks and rollers is being given its first washing in the

tanks

2 and 3 as previously described. Obviously there may be as many sets of tanks and reels in addition to those illustrated as may be desired, although I have found that for the treatment of webs in the neighborhood of one-sixteenth of an inch and less in thickness, two or at the most three sets of washing tanksis sufficient. Moreover, the web of tanks until the chemicals in it are removed to the extent above indicaed.

As the treatment of successive lengths of parchmentized web is continued, the wash water in the various sets of tanks receives increasing amounts of parchmentizing chemicals, the liquid in the

tanks

2 and 3 naturally being the most concentrated and that, in the remainder of the tanks decreasing inf concentration, depending upon their distance from the first set of tanks.

After the concentration of the wash water in the first series of tanks has reached the desired point, it is drawn off and evaporated so that it may be used either directly or with the addition of suitable materials, in parchmentizing new bodies of paper web or other material. The liquid removed from the

tanks

2 and 3 is then replaced by the Weaker .solution in the tanked, 5 and 6,

less contaminated, I am enabled to materially increase the speed of operation, reduce the length of the washing plant as a -whole and efiiciently obtain more or less concentrated solutions which may be advantageously evaporated torrecover the chemi-' cals they contain.

Aswill be understood by those skilled in the art, after the web has been sufficiently washed, it is dried or otherwise prepared for use,

Another advantage of the invention resides in the freedom of the webto shrink during the washing operation without in any way interfering with the performance of the apparatus, for it is obvious that any changes in the length or tension of said Web, occurring while it is being drawn, through the tanks, can at most have no effect other than to cause'a variation in the speed of revolution of the roll from which it is beingdrawn. As the driven roll increasesin diameter and therefore tends to increase the tension on the web, the differential gearallows rotation of the roller shaft relatively: to the driving pulley, to an extent sufiicient to make upor compensate for, such increase of diameter.

In the present case the frame of the differential gear is driven from the source of power through a supporting shaft 35 to which is secured and has loosely mounted upon it a beveled pinion which meshes with a pair of

beveled gears

31 and 32, respectively fixed to two pulleys 3.3 and 34:,

shownin Fig. l and loosely rotatable upon is run back and forth throu h an one set the supporting shaft 35. One of these pulleys, as 33, through a suitable; belt, drives the tank rollers 13 while the other 34 drives. the reel upon which the parclnnentized web is. wound. In a typical case the diameter of the roll driven by this latter pulley varies from twenty-two inches to sixty inches and the differential gear forms. a balancing element whereby this roll decreases in speed with the increased speed of the web so as to maintain an even tension thereon at all times, regardless of the increased diameter of the roll upon which said web. is being wound.

It will be understood that in addition to the differential gear for each, of the rolls, the latter each has a clutch 21 whereby it may be connected to or disconnected from r the main driving shaft or source of power.

I claim;--. V l. The method: which consists in treatlng a Web with a parchmentizing liquid; and thereafter repeatedly passing said web through a body of Washing liquid until the strength ofthe liquid Within the body of the web is substantially the same as that of said Washing liquid.

2. The method which consists in treating a web with a parchmentizing liquid; therea after repeatedly passing the web through a body of washing liquid until the strength of the parchmentizing solution within the body of the web is substantially the same as that of said washing liquid; and repeatedly passing the web through a second body of washing liquid until its strength is the same as that of the parchmentizing liquid in the body of the web.

3. The method which consists in continuously parchmentizing a Web of material; Winding the parchmentized Web onto independent rolls; successively drawing the rolled sections of the web back and forth through a plurality of independent baths of washing liquid; and finally rolling up said sections of the web.

a. The method which consists in passing a web through a parchmentizing liquid; forming a roll of the parchmentized web; drawing said web from said roll through a body of washing liquid; forming it into a second roll while maintaining it at a constant tension; and thereafter repeatedly passing the web through the body of washing liquid also while it is maintained under constant tension until the strength of the liquid within the web is substantially the same as that of the washing liquid.

In witness whereof I aflix my signature.

JOHN M. TAYLOR.