US1984484A - Apparatus for feeding paper making machines - Google Patents

Description

' 1934-v G. D. KILBERRY APPARATUS FOR FEEDTNG PAPER MAKING MACHINES Filed Nov 14, 1931 INVENTOR $1 7 E I N W R #5 m/m Patented Dec. 18, 1934 UNITED STATES assign PATENT @FFHQE.

George Daniel Kilberry, Lancaster, Pa.

I Application November 14, 1931, Serial No. 574,974

12 Claims.

This invention relates to improvements in method of and apparatus for feeding paper making machines, especially of the Fourdrinier type, and its object is to provide a better method and apparatus for feeding the stock to the moving part of such machines than have heretofore been available.

More specifically, its object is to form a sheet or pond of stock on the moving part before any drainage therefrom occurs.

Still more specifically, its object is to provide a way and means for causing stock to flow evenly onto the moving part and to form itself, while in its original condition, into a sheet of desired width and thickness, moving at the same rate as that of the moving part, in a quiescent state.

Further objects of the invention will appear from the following specification in which I will describe the invention, the specific features of which will be pointed out in appended claims.

Referring to the drawing,

Fig. 1 is a sectional side elevation of the wet end of a Fourdrinier machine provided with an apparatus which embodies my invention;

Fig. 2 is a front elevation of the adjustable weir shown in Fig. 1, looking toward 'the'head box;

Fig. 3 is a transverse section taken on the line 33 of Fig. 1, with the equalizing blades omitted;

Fig. 4 is a sectional side elevation of a modified form of a part of the apparatus shown in Fig. 1;

Fig. 5 is a transverse section of some of the parts on a larger scale, showing the arrangement of the equalizer blades; and

Fig. 6 is a fragmentary side levation of some of the equalizer blades and their connecting chain.

It is a known fact that stock running from a head box under a slice onto a Fourdrinier wire becomes agitated and wild, especially in high speed machines. The desire to increase the speed of the machines is limited largely by the fact that the rate at which it has been possible to lay the stock evenly on the wire is limited. By this improved method it is possible to feed the stock at any desired rate and in such an undisturbed even condition that a better sheet is formed. This method also makes it possible to use cheaper stock to produce paper of equal strength to that produced from better stock by former methods.

Further details of the invention will appear from the following description.

10 designates a Fourdrinier wire, running between a breast roll 11 and a driven couch roll 12. This is shown as supported on rollers 13 and running over suction boxes 14 in the usual way. 15

(Cl. 9H4) rollers 13 and around a roll 21 which is preferably driven.

30 is the head box having a horizontal edge 31 over which the stock runs and across an inclined apron 32 to wire 10. 33, 33 are vertically adjustable gates by means of which the head of the stock is maintained at a desired height above the edge 31 and its rate of flow controlled. This arrangement forms an adjustable weir.

The operation is as follows: The weir is adjusted to permit the stock to flow, where it reaches the wire, at approximately the same rate as the rate of movement of the wire and in such amounts as to form a sheet or pond 40 on the wire of desired thickness moving with the wire There is no slice or anything else touching the" upper surface of the stock to agitate it. Any agitation of the stock is harmful because the specific gravity of its constituents differs so greatly that they have a tendency to separate.

According to my invention I carry this pond along on the wire for a considerable distance before any drainage occurs. This is accomplished by the use of the non-porous belt 20, the upper run of which is of sufficient length to permit the stock to come to a complete state of quiescence before it runs off of the belt. The consistency of the stock in this traveling pond is the same as it is in the head box. The uniformity of the water content or its even distribution in the stock as it reaches the drainage part of the machine results in a uniform even drainage and in the formation of a more perfect-sheet even at higher wire speeds than have been possible heretofore.

Fig. 4 is an illustration of an adjustable weir of modified construction which also embodies my invention. In this case the stock flows over a curved shoulder 31A, across a shelf 32A onto the part of the wire 10 which is sealed by the apron 20 to form the traveling pond 40.

50 designates equalizer blades which may be used in making certain grades of paper. These are transverse parallel blades with spaced openings 51 on their lower edges in staggered relation. They are carried by a chain or links 52 which run over pulleys 53, 54. Pulley 54 is driven at variable speeds by a mechanism indicated diagrammatically at A in Fig; 1. The'blades 50 run between the deckle straps 15 with their lower edges touching or in close proximity to the upper surface of the wire 10. When they are run atv the same speed as that of the wire, they travel along with the pond and have no effect upon it, but when they are run slower than the wire they have a stirring or equalizing effect upon the stock in the pond. It is usual to run the blades but slightly slower than the wire as but little stirring or equalizing of the stock in the pond is needed to produce a smooth sheet, but they may be run slower of faster if it is desired to form a lay or uneven eflect in the finished paper.

I am aware of the fact that the method herein disclosed, of forming a traveling pond of stock on a moving part of a paper making machine, may be carried on with various kinds of mechanism and in difierent types of machines. For this reason the one kind of mechanism and one type of machine which I have illustrated is shown very diagrammatically and I intend no limitations other than those imposed by the appended claims.

What I claim is:

1. An apparatus for feeding paper making machines which comprises a movable stock receiving member, a fixed lip over which a sheet of stock flows onto said member means for adjusting the head of the stock above said lip, and means movable with the part of said member which first receives the stock for preventing the drainage of water from the stock.

2. An apparatus for feeding paper making machines which comprises a movable stock receiving member, a fixed lip and an inclined apron over which a sheet of stock fiows onto said member means for adjusting the head of the stock above said lip and means movable with the part of said member which first receives the stock for v preventing the drainage of water from the stock.

that part of said wire upon which the stock is first received.

5. An apparatus for feeding paper making machines which comprises a movable stock receiving member, means for flowing a sheet of stock onto said member, means movable with the part of said member which first receives the stock for preventing the drainage of water from the stock, and a plurality of blades movable longitudinally with the stock on the aforesaid part of the movable member.

6. An apparatus for feeding paper making machines which comprises a movable stock receiving member, means for flowing a sheet of stock onto said member, means movable with the part of said member which first receives the stock for preventing the drainage of water from the stock, a plurality of blades movable longitudinally with the stock on the aforesaid part of the movable member, and means for adjusting the rate of movement of said blades.

'7. In a paper making machine, a Fourdrinier wire, a non-porous band under and in contact with a part of the wire and arranged to move with the wire, and a. plurality of blades over said wire and band arranged to move longitudinally with them.

8. In a paper making machine, a Fourdrinier wire, a non-porous band under and in contact with a part of the wire and arranged to move with the wire, and a plurality of blades over said wire and band, and means for moving said blades longitudinally at adjustable rates.

9. In a paper making machine, a Fourdrim'er wire, a fixed lip over which stock fiows onto said wire, means for adjusting the head of the stock above said lip, a non-porous band under the'wire arranged to move with the wire and to seal that part of said wire upon which the stock is first received, and a plurality of blades over said wire and band and means for moving said blades at adjustable rates.

10. In a paper making machine having a Fourdrinier wire and deckle straps, a fixed lip ver which stock flows onto said wire means for adjusting the head of the stock above said lip, a nonporous band under the wire arranged to move with the wire and to seal a portion thereof between the deckle straps, and an endless chain above said wire and band having transverse blades projecting therefrom arranged to run longitudinally with the stock on the wire between the deckle straps.

11. In a paper making machine having a Fourdrinier wire and deckle straps, a fixed lip over which stock fiows onto said wire means for adjusting the head of the stock above said lip, a non-porous band under the wire arranged to move with the wire and to seal a portion thereof between the deckle straps, an endless chain above said wire and band having transverse blades projecting therefrom arranged to run longitudinally with the stock on the wire between the deckle straps, and means for driving said chain at adjustable rates.

' 12. ,An apparatus for feeding paper making machines which comprises a movable stock receiving member, means for flowing a sheet of stock onto said member, means movable with the part of said member which first receives-the stock for preventing the drainage of water from the stock, and means for stirring the stock on the aforesaid part of the stock receiving member.

GEORGE DANIEL KILBERRY.

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