US1492563A - Paper-making machine - Google Patents

Description

May 6, 1924. 9253 F. A. HEADSON PAPER MAKING MACH I NE Filed Nov. 15 1920.

wd/w M wcflw ream a a. neon, or MILWAUKEE, Wisconsin.

G MACHINE,

Application filed November 15,1920. Serial sarcasm.

To all whom it may concern:

Be it known that l, FRANK A. HnAD'soN, a citizen of the United States, and resident of Milwaukee, in the county of Milwaukee and State of Wisconsin, have invented certain new and useful lm rovements in Paper-Making Machines, 0 which the following is a specification.

This invention relates to that class ofpaper makin machines in which paper pulp or materia for forming the paper is deposited on an endless apron of felt or similar material, in a moist condition, and the water and moisture then removed by passmg the layer of pulp or web of material to be operated upon, and the endless apron or felt upon which the pulp is deposited, between pressing rolls to remove the water from the pulp or web, and then causin the web to pass between and in contact wit the peripheries of a series of drying rolls suitably heated for the purpose, so that the web or sheet of paper pulp is built up or formed while the pulp is in a moist condition, the water pressed out from the web of pulp, and the web or sheet of paper dried in one continuous operation. a

The principal object of the invention i to provide a paper making machine of the class described, with web-formin and waterremoving pressing roll mechanism adapted to form and press the water from a web or sheet of paper pulp or fibrous material to be operated upon, in a sile, uniform, economical and eflicient manner, and in such a manner as to require a smaller number of pairs of water-removing pressing rolls than is found necessary in common practice inmachines in which the ordinary and well known' forms of water-removing pressm rolls are employed, and to enable the we of paper pulpor material operated upon to be more thoroughly and uniformly dried before passing to the main pressing and drying rolls than is commonly the case when ordinary known forms of water-removing pressing rolls or wringer rolls are employed.

A further object of the invention is to provide, in a paper making machine, a plurality of pairs of water-removing pressing rolls of such construction as to enable the water to be pressed out from the web of paper pulp in such a manner that the speed of. operation of the machine may he increased to any desired suitable speed without causing any injury to the web or sheet of pulp as it passes between the water-removmg pressing rolls, and without causing any undesirable washing away of the pulp as the web of pulp passes between the pressing rolls for removing the water from the web, and whereby each successive pair of waterremovmg pressing rolls will admit the web of'pulp therebetween in substantially as dry a condition throughout every portion of the and claims, and from an inspection of the accompanying drawings, which are made a part hereof. I

The invention consists in the features, combinations, details of construction and arrangement of parts herein described and claimed. a

In the accompanying drawings, Figure l is a" diagrammatic view in side elevation of the forward or wet portion of a pa r making machine provided with a plura ity of airs of water-removing pressing rolls con tructed in accordance with my invention;

Fig. 2 is an enlarged detail view in elevatlon' oi a pair of water-removing pressing rolls constructed in accordance with my invention, taken transversely of the machine on line 22 of Fig. 1, with parts of the lower roll broken away, to show its construction, and with parts ofthe machine frame broken away or omitted; and

Fig. 3, is an enlarged detail ,view in transverse section, through a portion of the lower roll shown in Fig. 2., and a plurality of which are shown m Fig. l. In constructing a paper making machine in accordance with my invention 1 provide a paper-making machine 1 having a frame 2, which may be of any desired ordinary and well known'form.

The machine which is shown in part, d agrammatically in Fig. 1, comprises .in its construction a series of tanks or vats 3, each of which is adapted to contain ground wood pulp or paper pulp floating m and complete rec ly saturated by a suitable quantity of water or liquid contained in the vets or receptacles 3. And rotatively mounted in suitable bearings, and operatlvely connected with suitable driving mechanism which maybe of any desired ordinary and well known form, is a series, or any desired number of pulp carrying and depositing rolls 4, one for each tank or receptacle 3. Each of these rolls 4 is rotatively mounted inside of its corresponding vat or tank 3 with its axle 5' in transverse relation to the tank. And each of said rolls is in the ordinary and well known form of a hollow cylinder having its eriphery formed of perforated or reticu lated, or open-work material. Each of the rolls 4 is normally partially submerged in a liquid mixture of wood or paper pu p floating in and saturated bya suitable quantity or proportionv of water contained in the tank in which such roll is rotatively mounted, and is adapted to raise upon the upwardly movin side of such roll, a layer of wet pulp whic is lifted up outof the wa ter and deposited'on the bottom or adjacent surface of an endless apron'fi formed of felt or similar'material, said apron being supported by means of a series of idler rolls or feeding. andsupporti rolls 7 in position to travel across and in position to receive-a layer or web of wet paper pulp on the bottom side of the felt apron as the latter passes over and in position to be pressed against the paper-pulp depositing peri heries of said rolls or molds 4. li/iounted a ove and in parallel relation to each roll 4 is the usual corres onding pressing or web-packing roll 8 having an imperforate or solid peripheral body ada ted to engage the upper side of the lower liip of the endless apron or felt 6 as the latter passes over the rolls 4 and between each air of rolls 4 and 8, so as to press the en less apron of felt against the I to the apron by the roll or rolls 4, to bedeposited on the lowerrside of the apron.

The tanks 3, rolls 4 and 8,.and mechanism for operating the sammmay be ofany ordinary and well known or suitable form familiar to those skilledin the art, and it is therefore deemed unnecessary to further describe the same in detail herein.

Mounted, by preference, over the tanks 3, and in position to admit the'upper lap of the endless felt apron 6, and the web of wet paper pulp deposited on and carried by said apron or felt, between the adjacentayer' of paper pulp carried up messes upper'rolls 9 and lower rolls 10, toward and into position to pass between the usual series of heated drying rolls-not shown. The upper endless apron 11 of felt is supported in the usual manner throughout the length of its upper lap by rolls 13 journaled in suitable bearings in the frame, and which may be of any desired ordinary and well known 7 form.

The lower roll 10 of each air of waterremoving pressing rolls is, y preference, provided with a perforated or open-work outer cylindrical body portion or peripheral cries, is} by preference, in the form of an ppen-work built up frame constructed as fol ows:

Circular end frames or webs'lfi having radial spokes or spider arms 17 on undertending. outward radially from hubs 18, are fixed to a supporting axle or shaft 19, the opposite ends or journal portions of which are journaled in suitablebearings in side frame members 2, 2, as shown .m Fig. 2. Intermediate or inner spiders 20, each consisting, by preference, of a series of radial arms or s okes 21 on and extending outward radially rom a central hub fixed to the shaft 19, are mounted upon and in fixed relation to the axle or shaft 19, at suitable intervals between the end frames or spiders '16.

A series of, metallic-preferably brassrods 22 are mounted upon the outer peripheries of the spiders l6 and 20, in position to extend in parallel relation to each other and lengthwise of the roll, said rods or bars 22 being spaced apart at regular oruniform distances from each other, and form-' ing a longitudinally ribbed cylinder '01 longitudinally ribbed cylindrical frame. Around the cylindrical ribbed frame-work formed by the rods 22 thus mounted on the spiders 16 and 20, is wound s irally a rod or wire 23 of'suitable dimensions incross section, and withits coils suitably spaced apart to-form. a suitable support for the outer peripheral layers of reticulated material 14 and 15, and permit water squeezed or pressed from the aper pulp or web of aper,'-and from the ayers of felt formed y the endless aprons 6 and 11, between which the web of paper ulp is compressed as the aprons and the web pass between the rolls, and the water is pressed from the web and felt through the. reticulated, or perforated peripheral body portion of the "cylindrical roll and inward toward the axial center of the openwork or built up roll, to pass out through the bottom side and ends thereof into a trough or box-like receptacle 24 located beneath each pair of rolls 9 and 10, respectively.

The top roll 9 of each pair of said rolls, may be in the form of a solid cylinder of any suitable material, preferably provided with an outer cylindrical peripheral coverin of rubber.

ach of the troughs 24 is mounted beneath'and in position to receive any water or liquid passing through or from the corresponding -openwork or built up roll 10, an is provided with one or more suitable discharge passages 26 which may lead back to any tank 3" or"'other receptacle. The

' troughs 24 may be mounted in the machine ,6 in the ordinary and well known manner.

The rolls iecommonly called molds1nay be of the same or similar construction to that of the rolls 10; but it is plain from the foregoing description thatthe functions and mode of operation of the rolls 10 is not to carry on the surface thereof wet pulp to be deposited on the endless apron, but to coact with the rolls 9 to press from the wet pulp already deposited on the endless apron as much of the water contained in the endless web of pulp as possible as the web of pulp is caused to pass between the perforated or openwork peripheries of the pressing rolls 10 and the upper pressing rolls 9. The web of paper pulp 12 deposited on the endless apron of felt 6 is thus carried between the endless aprons 6 and 11, and caused to pass with said aprons or endless belts between the pairs of rolls 9 and 10, so that each pair of the rolls 9 and 10'receives the web of paper pulp in as dry a conditionas possible, and resses out as much of the water contained 1n the pulp as possible, and water is prevented, so far as possible, from being dammed up in front of or on the receiving side of the respective pairs of rolls 9 and 10. Instead of being dammed up in front of each pair of said rolls 9 and 10as in the case of using two imperforate or solid rolls such as are in common use, in lieu of a lower roll provided with a perforated or openwork periphcryit is plain that the lower rolls l0 constructed in accordance with this invention and having perforated peripheries against which the endless belt or apron of felt is pressed, permits the water contained in the web of paper pulp to be pressed through the lower endless apron of felt 6 and through the perforated or openwork periphery of the lower roll 10 of each pair of the above described pressing rolls, so that the water is caused to pass freely through the rolls 10 and into the troughs, tobe carried to a suitable container or back to' the tanks 3, as desired. It is plain that the speed at which the web of pulp is carried between the rolls 9 and 10 may be much greater than would be practicable with bottom rolls having imperforate peripheries which would cause a piling up or damming of the water in the web of pulp and endless aprons on the receiving sides of the rolls. By thus causing the web of paper pulp to enter between each pair of pressing rolls in as dry a condition as possible, and causing all parts of the web of paper pulp to be in a dryer condition on entering between each pair of said rolls than. it was on entering etween the preceding pair, the speed of operation of the entire machine maybe increased to a greater extent than would be practicable with ordinary pressing rolls in. which both the top and bottom rolls have imperforate peripheries.

I claim p 1. In a paper making machine, the combination of a pair of water-removing pressing rolls rotatively mounted in parallel relation and comprising an upper roll, and a lower roll having a cylindrical periphery formed of woven wire fabric adapted to admit water through the openings in the periphery to-the interior of the roll; an endless traveling apron mounted in position to pass between said rolls and over and in engagement with the openwork periphery of the lower roll, and means for depositing a layer of Wet pulp upon the surface of such endless apron 1n position to pass between the rolls, said endless apron being located between the 'pulp and the periphery of the'lower roll,

and the pulp being out ofcontact with the openwork periphery of said lower roll.

2; In a paper makingmachine, the combination of a pair of water-removing pressing rolls rotatively mounted -in parallel relation and consisting of an upper roll, and a lower hollow roll having a cylindrical periphery formed of openwork material comrising a series of longitudinal bars mounted in parallel relation upon supporting frame members and spaced apart, and an outer peripheral layer of reticulated material encircling said longitudinal bars, all adapted to admit water through the openings in the periphery to the interior of the roll, an endless traveling apron having its upper lap mounted in position to pass between said rolls and between the openwork ill) periphery of the lower roll and a layer of paper pulp to be carried upon the endless apron but out of contact with the openworlr periphery of the lower roll, and means for operating said rolls and apron.

3. In a paper making machine, the combination of a pair of water-removing pressing rolls rotatively mounted in parallel relation and consisting of an upper roll having an imperforate periphery, and a lower hollow roll having a periphery formed of openwork material comprising a series of parallel longitudinal hers spaced apart and mounted upon supporting frame memhers, an outer peripheral layer of reticulated material, and a flexible element wound around said longitudinal bars and forming an openwork support for said outer peripheral layer of reticulated material, all adapted to admit water through the openings therein to the interior of the roll, and a paper-pul-p-cam'ying endless traveling a ron adapted to pass between said rolls an be tween the openworlr periphery of the lower roll and a web ofpaperpulp carried upon said apron and out of contact with openworlr. periphery of the lower roll,

4-. In a paper making machine, the co hination of a? pair of water-removing pressing rolls rotatively mounmd in pa allel re,

lation and consisting of an upper roll, and

a lower roll having periphery formed of openwork material comprising aseries of longitudinal hars spaced apart mountupon supporting?" e meinloers, a spiral member wound around said longitudinal bars and having its spiral windings spaced apart, and an outer peripheral of woven wire encircling said spira niemher and supported thereby, all admit water through the openings in such periphery to the interior of such lowerroll, a paper-pulp-carrying endless traveling apron mounted in position to pass between said rolls and between the openworlr periphery of the lower roll and a web of Wet paper pulp to he carried upon said apron and out of contact with the openwork periphe-ry of the lower roll, and an upper endless apron mounted in position to engage and pass between the web of paper pulp and the surface of the upper roll.

5. la. a paper making machine, the com hination of a pair of water-removing press leas es ;l::etween said rolls and between the openwork periphery of the lower roll and a layer of wet paper pulp to be carried upon said apron and out of contact with the openwork periphery of the lower roll, means for depositing a layer or web of wet paper pulp upon the surface of such endless apron in position to ass between the rolls and outof contact with the open-work periphery of the lower roll, and an upper endless apron mounted in osition to engage and pass matween the we of paper pulp and the surface of the upper roll.

6. In a paper making machine, the com- 'bination of a pair of water-removing pressing rolls rotatively mounted in parallel relation and consisting of an upper imperforate roll,- and alower roll having a. periphcry formed of reticulated material adapted to admit water through the openings in such peripheryto the interior of the lower roll, a paper-pulp-carrying endless traveling apron formed of fibrous material mounted in position to pass between said rolls and between the openworlr periphery of the lower roll and a layer of paper pulp to he carried upon saidapron and out of contact with the openworlr periphery of the lower roll, means for depositing a web of wet paer pulp upon the outer surface of? such end ess apron in position to pass hetween the rolls and out ofcontact' with the openworlr periphery of the lower roll, an upper end ess apron having its lower lap mounted in position to en age and pass between the web of paper pu p and the surface of the upper roll, a water receptacle located in position to receive water discharged from the lower roll, and means for operating the rolls and aprons.

Sied at Chicago, Cook @ounty, lllinois, Ucto r 27, 1920.

FRANK A. HEADSQN. Witnesses;

Hanna ll. Cnonzna, FRANK J. Gnnaonrr.

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