US1127597A - Paper-moistening apparatus. - Google Patents

Description

H A. URAIGIER PAPER MOISTENING APPARATUS.

APPLICATION FILED 13180.9, 1912 1 1%? 5? I Patented. Feb. 9,1915.

l/WTA/EESES UNITED STATES PATENT OFFICE.

HUGH A. CRAIGIE, or CUMBERLAND MILLS, MAINE, ASSIGNOR To s. in. WARREN a 00., or BOSTON, MASSACHUSETTS, A PARTNERSHIP CONSIS'IING 0E FISKE WARREN, or HARVARD, MASSACHUSETTS, CHARLES w. WARD, or BEooKLINE, MASSACHUSETTS,

W. 13. NYE, OF NEWTON, MASSACHUSETTS, H. W. MASON, 0F IPSWVICI-I, MASSACHU- SETTS, R. D. SMITH, OF DEDHAM, MASSACHUSETTS, AND SAMUEL WARREN, OF

BOSTON, MASSACHUSETTS.

PAPER-MOISTEN IN G- APPARATUS.

Specification of Letters Patent.

Patented Feb. 9, 1915.

Application filedDecember 9, 1912. Serial No. 735,638.

' a specification.

his invention relates to paper making and has particular reference to the dampening or remoistening of the paper web prior to its calendering. .In passing throughthe paper making machine, there is a constant tendency to overdry the paper. For some time it has been known that superior calendering results may be obtained by offsetting this normal overdrying by moistening. In actual practice, however, this matter of remoistening has proved to be a very difiicult matter. By careful tests, I have found that for most papers, calendering is accomplished in minimum time and with the best finish with between three'to five per cent.

of water present in the paper. The percentage of water for different grades of stock and for diiferent finishes "aries therefore by rather small degrees of gradation. Under-moistening means a waste of time and failure of result, while over-moistenin is apt to spoil the paper altogether. An a solutely predetermined percenta e of moisture must therefore be added to t e pa er, and this moisture should be applied with as nearly absolute uniformity of distribution as possible. Attempts have been made to moisten the paper by 'spattering it with brushes, but this system was defective, both in that the amount of moisture could not be regulated, and that its distribution was not uniform.

By my present invention, I provide for absolute predetermined, uniform moistening, and I accomplish this during the operation of reeling, thus effecting an economy in the handling of the paper. By my invention, I am not only able to secure exactly the desired finish, but I have been able. to very considerably reduce the expense of the super-calendering process. This economy is effected by shortening the process so that, for example, I am enabled to calender certain papers in two runs, whereas heretofore at least three runs were necessary. This is not only a saving in time, permitting a greater output or a less number of machines in operation, but it also saves one-third of that waste which occurs at every step of the paper making process in which the paper is to be rehandled.

' The construction and arrangement of the apparatus which I have devised will be more fully disclosed in the specification which follows. In that specification, and in the draw,- ings which form a part of it, I Will make particular reference to one form of apparatus embodying the principles of my invention. I

It'will be understood that the apparatus may be modified for application to various types of paper making machinery.

In the drawings: Figure 1 is an end view of part of a paper making machine equipped with my improved moistening apparatus. Fig. 2is a side elevation thereof. Fig. 3 is an enlarged view of the moistening apparatus detached.

Referring'more particularly to the drawings in which like numerals of reference denote corresponding parts in the several fig ures thereof, the numeral 1 designates the frame of a paper making machine of any desired size or capacity from which rise bearing brackets 2 in which are journaled the shafts of the cone pulleys 3 connected by a belt 4 and driven by pulley 5, belt 5 and pulley 6, which receives power from any suitable source. This rotation is transmitted by pulley 7 belt 7 and pulley 8 to the shaft 9 of the moistening roller 10 mounted thereon. This roller 10 is revolved Tn the liquid containing trough 11, which trough is of the shape best shown in Fig. 3 and has its upper portion bent to form a guiding and steadying member disposed in the path of the paper web P. Water may be supplied to this trough in any suitable manner, a constant and uniform level being maintained by means of a pipe supplying an excess, and an overflow orifice carrying ofl such excess. From this construction it will be noted that the moistening roller 10 may be rotated at a predetermined speed by means of the va- Y of the moistening apparatus will be readily vriable speed pulleys 3. This permits the amount of moisture to be applied to the paper web to be accurately regulated to conform with the requirements of the difierent grades of paper.

The Web P of drying cylinders the paper is fed from the through the chilled iron rolls to the reels, (none of which are shown), and .passes over drums 12 and 13, and through thetrimming knives 14 and 15 to the driving drum l6, and rider 17 (These are regular equipment on any paper machine, and form no part of my invention). The web P passes downwardly against the moistening roller 1.0, which roller is rotated in a direction counter to the direction of feed of said web and passes upon the winding drum 18 from whence it is removed and carried to the calenders.

From the foregoing connection with the drawings, the operation i seen. It will be noted that the amount of moisture'applied to the paper may be regulated accurately by regulating the speed of rotation of the moistening roller 10 bymeans of the variable speed pulleys 3, or by regulating in any suitable manner the speed of the 'web of aper P. The steps in operation of the mac ine are thus reduced, as" the paper when properly moistened will description taken in take the required finish through the supercalender less times, thereby effecting a saving in power and reducing the liability of breakage ofthe web by one.

I claim:

1. In combination with the delivery end of the paper driers of a paper making machine, a moistening roll effectively disposed in the path of the paper when it leaves the driers and before it is finally reeled for ealendering, and a water trough having a constant water level in which said moistening roll rotates at predetermined speed and in reverse direction to the passage of the paper.

2. In combination with the delivery end of'the paper driers of a paper making machine, a paper moistening. roll effectively disposed in the path of the paper as it runs from the driers to the winding rolls, a liquid container in which said moistening roll rotates and having a constant water level and formed with a guiding portion disposed in the path of the paper feed prior to the contact of the paper with said roll.

In testimony whereof I aflix my signature in presence of two witnesses.

HUGH A. ORAIGIE.

Witnesses:

f BERTHA W. KNIGHT,

WILLIAM LYONS.

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