US1577897A - Paper-making machine - Google Patents

Description

March 23 1926. 1,577,897

A. DANNINGER PAPER MAKING MACHINE Filed D90. 12, 1924 A TTORNE 7.

Patented Mai. 23, 1926.

p -1,s17,s97-

PATENT OFFICE.

ALOIS nannmenn, or STEYRERMUHL, UPPER AUSTRIA.

PAPEn-MAKINGMAcHiNE.

Application filed December; 12, 1924. Serial No. 755,391.

To all whom it may concern."

Be it known that I, Anors DANNINGER, a citizen of the Republic of Austria, and residing at Steyrermuhl, Upper Austria, have invented certain new and useful Improve ments in Paper-Making Machines; and I do herebydeclare that the following is a full,-

clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to a wire part of Fourdrinier machines, especially of those with high travelling speed, and has for its object to retard the removing of the water from the stock, especially on the foremost portion of the wire, in order to allow the fibres of the stock to settle and to felt in a suitable manner. 1

Another object of the invention is'to provide a construction by which the intentioned retarding action of the device is regulatable in certain limits, according to the quality of the stock and the travelling speed of the wire.

The practice with high speed Fourdrinier machines has shown that the settling of the fibres and by this the sight of the sheet-Suf fers, when the removing of the water on the part of the wire is elfected too rap- 1 y.

As it is well known, the table rolls exert a considerable sucking effect on the stock liquid, and this suction is the more impetuous the faster the wire travels. In the case of high speed, consequently, the removing of the water occurs so suddenly that there is no time for the fibres to settle on the wire 1n an even layer, and this the more, as the stock has no time to calm down from the waving motion with which it arrives on the wire.

This inconvenience is met with by the in vention by means of a device which is apt for delaying the removal of the stock water and even for regulating this delay in accordance to the quality of the stock, the thickness of the sheet and'the travelling speed of the wire.

In the accompanying drawings- Fig. 1 is a longitudinal section of a flow box with the adjacent partsof the wire-partshowing an embodiment of my invention and i Fig. 2 be similar section showing an arv round the breast re and in contact with the rangement by which the delay of the water removal is regulable in a suitable manner. Referring to Fig; 1, I have indicated on the inside of the wire A an endless web C shorter than. the Wire A, which also travelsround the breast roll B together with the wire A. This latter, on its way in the direction of the suction boxes, is being accompanied by the web C till it reaches the table roll D. Then the Web C, around the roll D, returns to the breast rollB as shown in the drawing. By this arrangement, the web Q between the breast roll B and the table roll D, serves to tighten the wire A and in this way to slow down the removal of water from the stock, by the breast roll and the table rolls.-

Referring to Fig. 2, I have indicated an ;arrangement by which the web G, travelling likewise round the breast roll, may be lowered beneath the wire A, in order to reduce'the tightening effect of the web as described above and to let greater quantities of stock water pass through. For this purpose, the table roll D round which'the web C returns to the breast roll, is supported by an adjustable arm E, swinging round the axis of the breast roll B and being fixable in different heights. By this means, the angle a between the wire A and the web G may .conveniently be altered and the passage of the stock water regulated according to the travelling speed and the quality of the stock.

The kind of the web C may be altered in accordance with the working conditions. It may, e. 'g., consist of wire cloth, felt, or the like It will be understood that changes and modifications may be made without departing from the spirit of the invention as defined in the appended claims- What I claim is: V

1. In a Four-drinier machine, the combination of a wire travelling round a breast roll,

an endless perforated web through which I nation of a wire travelling round a breast roll, an endless perforated web through I which water may ass travelling likewlse no wire underneath same and returning to the breast roll round one of the table rolls.

3. In a Fourdrinier machine, the combination of a wire travelling round a breast roll, an endless web travelling likewise round the breast roll inside ofthe wire and in contact with same near to the breast roll, a table roll round which the endless web returns to the breast roll and being supported at each side by an adjustable arm, swinging round the axis of the breast roll and being susceptible to be fixed in different heights.

4. In a Fourdrinier machine, the c0mbination of a wire travelling round a breast roll, an endless web travelling likewise round the breast roll inside of the wire and in contact with same near to the breast roll, a table roll round which the endless web returns to the breast roll and being supported at each side by an adjustable arm, swinging round the axis of the breast roll. and being susceptible to be fixed in different heights, further table rolls located between the breast roll and the above mentioned table roll being likewise supported by the adjustable arms.

5. The method of wholly or partially tightening the wire of a Fourdrinier machine after the breast roll by inserting an endless perforated web through which water may pass inside of the wire which travels along with the wire underneath the same. v 1

6. The method of tightening the wire of a Fourdrinier machine after the breast roll by an endless web inside of the wire returning to the breast roll round one of the-table rolls,

the latter being adjustable in difierent heights in order to vary the angle between the wire and the web and thus to regulate the quantity of stock water passing through the wire in the foremost part of same.

In testimony thatI claim the foregoing 'as my invention, I have signed my name.

ALOIS DAN NINGER

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