US1808536A - Imprint device - Google Patents

Description

June 2, 1931. 1, L FI 1,808,536

IMPRINED' DEVICE Filed Jan. 19, 1929 iTiS3 iTSiiEEEEEEEE /fl M /Nl/ENTOR /ra TF/sk ATTORNEY Y r are heated to a much higher degree than the surrounding areas and hence are dried at a Patented June 2, 1931 "UNITED STATES PATENT OFFICE IRA T. FISK, OF NORTH HOOSICK, NEW YORK, ASSIGNOR TO STEVENS &, THOMPSON v PAPER COMPANY, OF NORTH HOOSIGK, NEW YORK, A CORPORATION OIENEW YORK IMPRINT DEVICE Application filed January 19, 1929. Serial No. 333,679.

My invention relates to devices for imprinting papers with so called water marks, andwhile suitable for marking any kind of paper, it is particularly adapted and designed for the marking of creped tissue such as that used for toilet papers and towels.

'It has heretofore been diflicult, if not impossible, to satisfactorily water mark a creped paper because in the drying process themark becomes indistinct or is entirely obliterated. In the ordinary method of marking papers, the paper web is uniformly heated, or if not heated is at least of uniform temperature, throughout, and it has been sought to obtain the desired mark by themere application of'pressure over limited areas. This has been accomplished by means of a marking roll which is held in contact under substantial pressure with a platen roll and between which said rolls the paper runs. Sometimes both of the rolls are cold and sometimes one'ofthe hot dry-' ing rolls is utilized as a platen roll. In either case the web ofpaper is of substantially uniform temperature throughout;

According to my method those limited areas of paper which form the design itself much higher rate. In addition to heating 'only *the limited areas of the paper web 'WhlCl'l carry the design I also apply pressure to these'areas so that the design is practically ironed into the paper and dried.

The objects of -my invention are to provide a ma'rln'ng device and a method of procedure whereby it is possible to satisfactorily apply a socalled water mark to any kind of paper and particularly to creped tissues such as towels, toilet papers and the like, whereby a distinct and clearly appar-[ ent mark is produced upon orin the finish ed paper. Anotherobject of my invention is to provide a method of procedure and a means whereby this marking may be done at a comparatively high speed so that the paper may bemarked as it passes through the ordinary paper making machine at-the usual speed. r

With these objects in view myinvention rolls.

includes the method of procedure and the means described below and illustrated in V V the accompanying drawings, in which--- Fig. 1 1s a diagrammatic s1deelevation View of a portion of a paper making machine showing my marking device and several of the drying rolls near the wet end of the machine' Fig. 2 is an enlarged'detailed side' elevation view of my device; and a Fig. 3 is an elevation view of the marking roll.

Referring to the drawings, 1' represents the ordinary dryer rolls; .2 is the upper dry-; er felt and 3 the lower dryer felt. 4 represents the feltrolls and 5 represents the paper Web which is travelling in the direction o the arrow indicated in Fig.1. 7

Mounted in a convenient place'upon the frame, 6,0f the paper machine is the bearing, 7, in which isjournaled the markin roll, 8. This roll is provided with a design in relief such, for example as shown at 9,-'a'nd which)" should be 0.075 inches or more above the general surface of the roll. The marking roll is hollow and is provided with caps, 10, at each end of the hollow shaft through which lead steam pipes, 11 and 12- Steam is passed through the cylinder in the same way as throughthe dryer rolls and to a substantial degree.

it is thus heated A platen roll, 13, over which may pass the v upper felt, 2,.is journaled in the arm, 14, which in turn, is pivoted to the support, 15, at point, 16. The free end of this arm, 14, carries a weight, 17, designed to yieldingly force the platenroll toward the marking roll under some considerable pressure. From the marking roll and lies beneath the dryer felt,

2, which runs between the markin'gand platen I prefer to arrange the marking rollin 2% rolls, the areas in contact with the relief porthe rolls, the web of paper continues around about the position shown so that the web of paper extends a considerable distance around the surface thereof. In other words, it is desirable to hold the paper in. contact with the heated design on themarking roll as long as possible, and for this reason, where the paper speed is high, the markingrollshould be of comparatively large diameter.

At the press rolls, the paper is creped and is then led intothe marking device, as shown in Figs. 1 and 2. Here, thecreped paper tions of the design are not only heated but are also highly. compressed against the'feltso that considerable moisture is absorbed therefrom. After leaving the bite between the marking roll but is not generally in contact therewith; it being only in contact with the relief or raised portions of the design thereon. In this way heat is applied to those limited areas of the paper web which com-v prisethe design, and for a comparatively long time, depending upon the speed and diameter of the marking roll. In this way itwill be apparent that these particular areas are dried atarate which is much faster than the dryingof thoseareas of the paper which immediately surround the design. In this way the design is permanently ironed into the paper and is not destroyed by the subse'--.

quent passage of the paper around the drying rolls. I

When one-of the'dryer rolls is used as a platen, as heretofore, it will be apparent that the entire web of paper being in contact with the surface thereofwillbe uniformly dried throughout. With my arrangement, the clesign portion isdried atamuch higher rate than the otherportion thus giving. permanence thereto. r

l/Vhile I have described iny invention as particularly adapted-for the marking of a creped paper (because great difficulty has. heretofore been encountered in the successful marking of such papers), it is obvious that my deviceiis not limited to such applications but may be used for any paper. Hence it is to be understood that the {words whichI have used in describing my invention are words of description rather than of limitation, and that changes'w-ithin the purview ofthe appended claims may be made without departing from thej true ,scope andspirit thereof in their broader aspects;

What I claim is v 1. In apaper making machine, the combination with a marking roll, of means for heating said roll, a platen roll, and a dryer felt running between said rolls adapted to convey the paper into contact with the marking rollr r 2. In a. paper making machine, the, combination with a marking roll, of means for heating said roll, a platen roll, a dryer felt running over said marking roll, and means for yieldingly compressing the felt between said rolls. 1 i 1 i 8, In a paper making machine, the combination with a marking roll, of means for heating said roll, aplaten roll, and means for conducting the paper, web between the marking and platen roll.

at. A'device of the character described for marking a web. of paper and comprising heated marking roll around which the paper runs, a dryer felt runn-ingaround saidv roll and adapted to maintain the paper in contact therewith, a platen'roll, and means, for yieldingly compressing the felt and paper. between said. rolls. V r

5. In apaper making machine including a plurality of dryer rolls,;a deyice formark: ing the paperfcomprising a heated marking roll having a design in relief thereon and around which the paperruns before reachingthe dryer rolls, means for yieldingly compressingthe paper against themarking roll, and means for drying'those limited areas, of the paper which carry the imprint of the. relief part of the design'at a faster. rate than the surrounding areas. I

6. The process of watermarking paper which comprises, substantially compressing awet web thereof over limited areas to form the desired watermark, andmomentarily maintaining said limited areas ata higher temperature than the-surrounding areas to effect a relatively quicker drying-thereof.

7. The process of watermarking paper which comprises momentarily applying heat to limited areas of a wet web thereof con-v forming to the desireddesign, and thereafter compressing said limited areas to a substantial degree while continuing the heating thereof; whereby said areas. are dried at a faster rate than the surrounding areas.

8. Theprocess of watermarking paper which comprises momentarily heating limited areas thereof conforming to the desired design, compressing said, limited areas; toa

substantial, degree during the heating thereof, and thereafter momentarily maintaining said compressed areasuat 2tl11gl1BI temperature than the surrounding areas; whereby said compressed areas are rendered compara t vely dry.

9. The processof watermarking paper which comprises momentarilycompressing limited areasthereof conformingvto the. de-

sired design, and simultaneously heating imited. eas. t0 ,a h deg ee than the 60 tion of its periphery.

surrounding areas and partially absorbing the moisture therefrom.

10. In a paper marking device of the character described, the combination with a marking roll, of means for heating said roll, a platen roll, a belt of absorbent material between said rolls and means for compressing the paper between the marking roll and belt.

11. In a device of the character described, the combination with a platen roll, of a heated marking roll coacting therewith, and

means for retaining a web of paper in contact with said marking roll over a substantial portion of its periphery.

12. In a device of the character described, the combination with a platen roll, of a heated marking roll coacting therewith, and means for retaining a web'of paper in contact with said marking roll over a substantial portion of its periphery before passing between said rolls.

13. In a device of the character described, the combination with a platen roll, of a heated marking roll coacting therewith, and

; means for retaining a web of paper in contact with said marking roll over a substantial portion of its periphery after passing between said rolls.

14. In a paper making machine, the combination with a platen roll, of a heated marking roll coacting therewith, and a web of paper passing between said rolls and having close contact with the marking roll over a substantial portion of its periphery.

15. In a paper making machine, the combination with a platen roll, of a heated marking roll of comparatively large diameter coacting with said platen roll, and a web of paper passing between said rolls and having close contact with the marking roll over a substantial portion of its periphery.

16. In a paper making machine, the combination with a platen roll, of a heated marking roll coacting therewith, a web of paper passing between said rolls and having close contact with the marking roll over a substan- I tial portion of its periphery, and meansfor yieldingly compressing the paper between said rolls.

17. That step in the marking of paper which consists in applying a higher degree of heat to the portions of a wet web thereof conforming to the desired design than to the portions surrounding said design.

18. In a paper marking device, the combination with a heated marking roll, of a belt of absorbent material running around said roll and adapted to retain a wet web of paper in contact with said roll over a substantialpor- IRA T; FISK.

Images