US1986977A - Paper machinery - Google Patents

Description

Jan. 8,1935.

H. L. KUTTER PAFER MACHINERY Filed Jan. 25, 1932 2 Sheets-Sheet 1 Jan. 8, 1935. L, KUTTER 1,986,977

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2 Claims.

This invention relates to paper making machinery, and more particularly to paper driers and the like.

One object of the invention is the provision of a paper drier apparatus of the vertical dried type, embodying stacks or drier rolls the various rolls being s'o arranged as to provide an effective and uniform heating and supporting action on the paper web as the latter passes throughthe machine in a desired path.

Another object of the invention is the provision of a paper drier apparatus embodying drier roll stacks some of which are arranged at a substantially higher level than others so as to. provide spaces or areas in the contines of the drier, these areas or spaces so provided being suitable as locations for machinery or providing space for broke removal.

Another object of the invention is the provision of a. paper drier of the vertical drier type, embodying spaced roll stacks, a plurality of transfer rolls being provided for transferring the paper in a serpentine manner from an end roll of one stack to an end roll of an adjacent stack in order that the temperature of the paper may be maintained as it travels over a comparatively large gap existing between adjacent stacks to reduce the .likelihood of breakage and prevent cockling of the paper that might otherwise be caused by absorption of condensed vapor especially at the edges of a comparatively thin sheet.

Other objects and advantages of the invention will be apparent from the following description, the attached drawings and the appended claims.

In the drawings:-

Fig. 1 shows a partly diagrammatic elevational view of a paper drier apparatus embodying the present invention;

Fig. 2 shows a modified arrangement so designed as to provide machine locations in the connes of the drier apparatus; and

Fig. 3 is a diagramatic arrangement of the drier rolls of Fig. 2.

Referring to the drawings by reference numerals, and rst with respect to Fig. 1, the invention has been shown in the form of a paper drier apparatus of the vertical drier type, embodying paper drier units 10, 11 and 12 through which the paper web passes as it is carried from the fourdrinier or other web forming machine, to the calenders or other paper handling idevices'. The paper web, as it passes through the driers, is conducted around drier rolls, power driven in any suitable manner from a drive pinion 13 or the like,'and heated'internally by steam or the like to a high enough temperature so that the water content of the web will be driven off.

.The unit 10 embodies a double stack 14\ of drier rolls supported in superposed staggered relationship so as to provide a serpentine path for the moist paper web 15. The stack 14, comprising the heated drier rolls 14a to 14f `incmsive, is prog vided on the frame side or standard 16. A second frame side 17 carries a second series or stack 18, the rolls of the stack 18 comprising rolls 18a, 18h, and 18o arranged one vertically above the other onthe inner side of the frame side 17; and also comprising rolls 19a, 19o, and 19e, on the outer side thereof. As shown, the rolls 18h and 18o are staggered with respect to the rolls 19a and 19h to provide quite short spaces between these rolls.

The unit 11 comprises a series of vertically arranged rolls 20a, 20h and 20c carried on the frame member 21 which also supports a second Vseries of rolls 22a, 22h and 22o. The opposite frame side 24 carries the rolls 25a, 25h and 25o and the additional `rolls 26a, 26h and 26e. The arrangement of the rolls on the unit 12 is similar to the arrangement of the units 10 and 11.- This unit 12, and as many additional units may be employed as desired.

In order that the moist paper web may be effectively supported and transferred from the end roll of some stack to the adjacent end roll of a second stack, in a manner that has been more fully set forth in my copendng application (Docket 1036), filed on even date herewith, Serial No. 588,583, a heated transfer roll 29 may be provided between the lower roll 14a of the stack 14 and the roll 18a, as shown in the drawings. A heated transfer roll 30 may also be provided between the rolls 19e and 20c, the two top rolls of the adjacent stacks of the two units 10- and 11. In this way the temperature of the moist paper web is maintained as the latter is carried across the intervening space between one stack and a succeeding stack of a unit, and between the end roll of one unit and a succeeding unit, and uneven drying due to absorption of water, especially at the edges of a thin sheet, is effectively taken care of. However, in the form of construction illustrated in Fig. 1, the unsupported length of paper web between the rolls 14a and 18a, or between the rolls 19e and 20 may not be large, and the transfer rolls 29 and 30 need not be used.

It will'be noted that the rolls 19a, 19h and 19e, which are. provided on the outer side of the machine frame, are only on the upper portions of `the frame. 'I'he adjacent units are rather close -I together, and the result of arrangement of the various drier rolls and of the drierunlts is# the provision of a space 32 between the frames oftheunits10and11andaspace33betweenthe frames of the units 11 and 12. These spaces afford a means of access to the paper rolls and serve as broke receiving chambers or areas.

VOpenings 34 are preferably provided in the iloor ing of the paper. For example, as'shown in Fig. 2, smoothing rolls 36 and 37 are located in the spaces'38 and 39, these smoothing rolls being adapted for cooperation with the paper web as it passes from one drier stack to another in the course of the drying operation. V-

The particular arrangement of the drier rolls of Fig. 2 is illustrated on a larger scale in Fig. 3. As therein shown, the drier unit 40 comprises a series of rolls 42 to 45 inclusive along side o! whichis a second series of rolls 46 to 48 inclusive, these various rolls constituting 'a vertical double stack of drier rolls, the rolls being arranged in superposed staggered relationshipso as to ail'ord a serpentine path for the paper web 50. The unit 40 also comprises a second double series or stack, embodying tlie rolls 52 to 59 inclusive.

The unit 41 is constructed in the same manner as the unit 40, and embodies two double series or stacks designated generally 62 and 63, series 62havingabottomroll64andatoproll65while jserles63hasabottom roll66andatopr'oll6'1.

The paper web is carried from the upper roll 45o! the 'rst stack of unit 40 down around the transfer roll 70 up over another roll 'I1 and down over another transfer roll '12. before it reaches the upper side of 'the top roll 59 of the second stack. The rolls "l and 'l2 are preferably heated,

AVand theroll'l which maybe lust like the drier rolls of the roll stacks. is also heated by steam or the like. The two rolls 45 and 59 may be arranged a considerablev distance apart and as the paper web travels across the space intervening 'between the two rolls, it is supported and its temperature is maintained by its engagement with the three transfer-rolls just mentioned,

` which support the paper web in a serpentine path and function in a manner calculated to eil'ectively4 transfer and support the paper web and prevent cockling tendencies that might otherwise be caused by absorption of condensed water vapor.

' At the lower ends of the adjacent drier units 40 and 41, the paper web is carried or transferred from one unit to the next by means of the heated drier or transfer rolls '14, 'I5 and '16. Roll 15 corresponds in construction to the rolls of the drier stacks while rolls 'I4 and 'I6 are preferably smaller in diameter. All of these transfer rolls are preferably heated. The web passes vover or along the upper side of the rolls rI4 and '76 and is carried in contact. with the lower side of the central roll 75. In this way the comparatively large space existing between the rolls 52 and 54 is effeetively bridged, and thel temperature of the paper is maintainedr so that condensation is prevented and uneven absorption `of the' water,

especially at the edges of a thin paper web is avoided. The spaces may be as wide as desired since the double series of stacks may be spaced apart any desired distance merely by suitable design ofthe transfer rolls which conduct and carry the paper from one stack to the next. The spaces existing between adjacent drier stacks at their lower ends may be employed as locations for smoothing rolls or the like, as previously mentioned, and they may be as high as desired although the space above them is effectively utilid by the drier rolls.

While the forms of apparatus herein described constitute preferred embodiments of the invention, it is to be understood that the invention is not limited to ,these precise forms of apparatus, and that changes may be made therein without departing from the scope of the invention which is deilned in the appended claims.

1 What-is claimed isz' 1. In a paper drier apparatus of the character described, a plurality of vertical drier lmit frames arranged in series, adjacent units having adiacent roll stacks overhanging the imit frames and arranged to provide spaces of a height equal to several roll diameters below -the overhanging rolls between adjacent units.

2. In a paper drying apparatus ofthe character-described, in combination, a i'ioor, a plurality of n'vertical drier unit frames arranged in series on the floor, adjacent units havingadjacent roll stacks overhnsing the unit frames and arranged to provide spaces of a height equal to several roll diameters below the over-hanging rolls between adjacent units, the floor having openings beadjacent units for the disposal of broke

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