US1634344A - Paper formation and weight indicator - Google Patents

Description

' 1,634,344 July 5 1927 R. A. STEFFEN PAPER FORMATION AND WEIGHT INDICATOR Filed May 19. 1926 Inventor Altzorney Patented July 5, 1927.

UNITED STATES RAYMOND A. STEFFEN, OF HAMILTON, OHIO;

PAPER FORMATION AND WEIGHT TNDIOATOR.

Application filed. May 19, 1926. Serial R0. 110,195.

This invention relates to a device for in- This invention comprehends the provision l6 dicating paper weight in formation and for permitting the accurate control of paper weight.

In the present practice in the art of paper making the operator of a paper machine, for

instance a Fourdrinier paper machine, in operating the Fourdrinier wire and the sluice gate or outlet gate in the flow box controls the speed of the wire and the flow of pulp or stuif from the flow box in such a way that from experience, paper of a desired weight could be manufactured with variable approximations.

The manufacture therefore, of paper of a predetermined weight is substantially variable and wholly dependent upon the guessing of the operator in connection with the operation of the sluice gate and the Fourdrinier wire, and the accuracy of result is governed entirely by the skill of the operator and at best the results produced are variable through substantially wide limits.

This results in View of the fact that the stock flowing from the flow box onto the Fourdrinier wire varies in consistency almosttcontinuously, at one timebeing relatively thick, providing heavy spots in the paper and at anot-her time being relatively thin in view of the greater proportion of water making thinner and less weight paper, and also from variations in the speed of the wire.

In order to make the paper uniform, it is necessary under this varying condition of the flow of paper stock from the flow box, to continually vary the speed of operation of the Fourdrinier wire or vary the opening of the sluice gate to permit a greater or ess amount of stuff to flow on the Fourdrinier wire. This again presents difiiculties in obtaining a good" grade of paper in View of the fact that if the stock travels faster than the Wire, due tobeing watery, the stock rolls over and over in flowing over the wire which produces cloudy paper, while if the wiremoves faster than the stock, the same rolling occurs in the opposite direction, producing the same result. 4 v

The control of paperweight is therefore amatter which at present is wholly guess work on the part of the operator of the paper machine, and dependent entirely upon his skill obtained by experience.

of means whereby this guess work in controlling the weight of the paper may be entirely eliminated and the control made positive and accurate in order that the weight of the paper may be made substantially .uniform' throughout by the proper and immediate control of the flow of stock or stuff fromv the flow boxand the speed of the Fourdrinier scription, and in the claims directed to the preferred form of the invention, it bein understood that there are various ways 0 carrying the same into effect which are clearly within the scope of the inventlon as herein set forth.

' In the drawing forming a part of this application: 7 Figure 1 is a bottom plan view of the device showing the parts in assembled relatlon i for accomplishing the results produced by this invention. I

Fig. 2 is a side elevation of the construction as shown in Fig. 1, in which parts are broken away and shown in section 1nd1cating the application of the device tora Fourdrinier wire for operation to produce the results by which control of the paper weight is obtained.

Referring to the drawings, 1 and 2 respectively, indicate a pair of tachometers of any well known type of construction used 1n the art and found most desirable for the pur-.

poses which are suitably supported in the bracket member 3 having the laterally extending ends 4 suitably bifurcated and adapted to receive tachometers 1 and 2 1n the manner as illustrated in Fig. 2, in which they are clamped through the compressing action of the set screws .5 which draw the bifurcated ends 4 of the member 3 together and rigidly support the tachometers therein.

. -Each tachometer is provided with a rotatable shaft 6 while a stub shaft 7 is mounted on the tachometer .at 2, which is formed with a reduced extension 8 on which the idler wheel 9 is rotatably mounted.

I The shaft 6 of tachometer 2 receives a suitable paddle wheel 10 while the shaft 6 of tachometer 1 has a drive wheel 11 rigidly mounted thereon.

The device is appliedinoperation as illustrated in Fig. 2. in which the Fourdrinier wire is indicated diagrammatically at 12, while the pulp flowing on the wire is indicated at 13. The idler 9 and the drive wheel 11 will have bearing and driving contact with the Fourdrinier wire 12, while the paddle 10 is of such a size that it will not engage the Fourdrinier wire but will be subject to the direct action of the pulp flow 13 on the wire 12. In this way, the tachometer-indicated at 1 will be driven in accordance with the speed of the Fourdrinier wire 12 while the tachometer indicated at 2 will be operated through the operation of the paddle wheel 10 by the flow of pulp 13 over the wire the Fourdrinier wire while the hand 17 ope erated by the tachometer 2 registers on the proper production 'of a predetermined stock on the Fourdrinier wire.

dial 18 the speed or flow of stuff or paper As a result the operator of the paper machine compares the two results and in this way the speed of the wire and of the stufi may be controlled in order to obtain the proper synchronization for producing paper having a uniform weight. 4

It will be understood that in the operation of this device, should the paper stock become watery and thin and consequently flow sub stantially faster than heavy or thick stock which condition results in the pulp box rather'than on the Fourdrinier wire, that this device will indicate this change in the consistency of the pulp in view of the fact that the thinner pulp containing more water will flow considerably faster than rich pulp or stuff which is thick and therefore flows substantially slower. 1

This change in consistency of the stock will therefore be immediately indicated by this device in order that the speed of the Fourdrinier wire may be varied to obtain the proper synchronization of flow and weight of paper.

Having thus described my invention, what I claim as new is 1. The combination of two rotary shafts mounted inadjacent relation, a drive wheel on one of said shafts, a fluid actuated means on the other shaft, and means mounted in associated relation having driving connection with the shafts for indicating the relative speed of the shafts.

2. Paper weight control indicating means having in combination, a pair of aligned rotary shafts, means operably mounting said shafts in associated relation, drive means for one shaft, fluid actuated means driving the other shaft, and means for indicating the speeds of said shafts.

3. Paper Weight control indicating means having in combination, a support, a pair of indicating devices mounted in associated relation in said support, and independent means for operating said indicating devices,

one of said means being formed for fluid actuation.

4. Paper weight control indicating means having in combination, a pair. of independent rotary shafts, means'for indicating the speed of rotation of said shafts, a bracket member mounting the shafts, a drive wheel on one shaft, an idler rotatably carried by the bracket member, and a fluid actuated device on the other shaft, said drive wheel and idler operably supporting the device.

5. Means for indicating paper weight for mation on a movable pulp carrying member comprising in'combination, a pair of independent indicating means, and means for operating said indicating means, one of said indicating means registering the speed of the carrying member and the other indicating means registering the flow of the paper pulp, said indicatingv means cooperating to 1nd1- cate the formation of paper in a predeter mined manner.

6. Means for indicating pa" or weight formation, wherein a paper mac ine includes a movable Fourdrimer" wire, adapted to receive a controlled flow of-paper pulp material, comprising means for indicating the speed of operation of said Fourdrinier wire and means for indicating the flow of said p 7. In combination, means operable by the pulp flow in a paper making machine for in dicating the rate of said flow, means operable by the pulp carryin mechanism for indicating the speed of said mechanism, and means supporting the first two mentioned means in associated relation whereby paper weight formation may be obtained in a predetermined manner.

In testimony whereof I afiix my signature.

. RAYMOND A. STEFFEN.

Images