US1375517A

US1375517A - Suction-box for paper-making machines

Info

Publication number: US1375517A
Application number: US375049A
Authority: US
Inventors: Johnson George Shepherd
Original assignee: Individual
Current assignee: Individual
Priority date: 1920-04-19
Filing date: 1920-04-19
Publication date: 1921-04-19
Anticipated expiration: 1938-04-19

Description

G. S. JOHNSON.

SUCTION BOX FOR PAPER MAKINGl MACHINES.

APPLICATION FILED APR. I9, 1920.

SUCTION-BOX FOR, PAPER-ING MACHINES.

speieationof Letters raient.,

Application filed .April 19,

To all whom t may concern.'

Be it known that I, GEORGE S. JOHNSON, a citizen of the United States, residingat Brainerd, in the county of Crow Wing and State of Minnesota, have invented certain new and useful Improvements in Suction- Boxes for Paper-Making Machines; and I do declare the following to be 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. t

This invention relates to an improved suotion box for use in connection with a paper making machineand one object of the invention is to so construct the box that the suction through the box may be evenly distributed and excessive wear -upon the felt prevented at any particular point. In suction boxes of the usual construction the suction above the exhaust pipe is greater than any other place-in the-box and therefore the felt at this point will be worn more than at other points whereas with this device the objection is overcome.

Another object of the invention is to so construct the suction box that the suction may be confined toa space of approximately the width of the paper and to permit of adjustment according to rthe width of the paper. Y

Another object of the invention is to so construct the box that the top or head thereof may be properly centered in the body portion of the box.

Another object of the invention is to so construct this box that the head may be formed of a plurality of sections which -will be separately placed in the body of the box and securely held in an assembled position.

Another vobject of the invention is to so construct this head that it may be easily built to the desiredfsize, it' simply being necessary to provide the proper number of intermediate sections according to the size of' head desired.7

Another object of the invention is to so construct the box that it may be easily and quickly taken apart for cleaning or repairs when necessary and be readily reassembled.

This invention is illustrated in the accompanying drawings wherein:

Patented Apre 19?, 1921. 1920. Serial No. 375,049.

Figure l is a top plan view of the improved suction box.

Fig. 2 1s a longitudinal sectional View through the box taken along the line 2 2 of Flg. l.

Fig. 3 is a longitudinal sectional view through the box taken along the line 3 3 of Fig, 2.

Fig. 4 is a transverse sectional view taken along the line /1-4 of Fig. 2.

Fig. 5 is a vi w showing the box in end elevation.

This improved box is provided with a housing having a bottom 10 and side Walls l1 which have their upper portions cut away from the-inner faces of the walls thus providing a seat for the head indicated in general by the numeral 12. This head is formed of a plurality of sections'the end ones 13 of which carry plates 14 which are engaged by the end sections 13 will at all times be used' and the proper number of intermediate sections 18 will be put in place according to the size of head desired. It will thus be seen that the size of the head can be easily varied according to thesize of the box. In order'to slidably mount the head, the sections forming the same will be provided with notches 2() thus providing side grooves in which the strips 21 carried by the side walls fit. Therefore the head can be moved longitudinally between the side walls of the housing and can be properly centered and securely held in the desired position by means of the screws 15.

'In order to properly distribute the suction through the housing there has been provided a baiie plate 22 which is positioned in the housing at a point intermediate its height and rests upon the longitudinally supporting strips 23 and end blocks 24 positioned in the lower portion of the housing. vThis bae plate is providedwith a plurality' of openings 25 which are grouped in the end portions of the plate. lt should be noted that the central portion of this plate which will be located above the port 2(5 from which extends the exhaust pipe 27 will be unperforated and therefore the suction will be prevented from bein@r excessive above the exhaust port. In this manner the suction will be evenly distributed throughout the width of the felt which passes' over the suction box and there will be no danger of .it being worn to a greater extent directly above the exhaust port than at any other point. It is also desired to have the suction coniined to the Width of the aper passing over the box and in order to o this there has been provided blocks 28 which are slidably mounted in the housing between the baiiie pl te 22 and the head 12. These blocks 2 are mounted upon the inner end portions of stems 29.which extend through the plates 16 and terminate in handles 30 so that the stems 29 may be easily grasped and' the stems moved longitudinally thus changing the positions of the blocks in the housing.

When in use the box is assembled as shown and suction through the housing will be provided by means of an exhaust fan connected with the pipe 27. The blocks will be moved to the proper points according to the width of the paper and as the paper moves over the suction box the proper action will taire place due to the fact that the suction throughout the width of the box is of even strength. When it is'desired to make any necessary repairs, the securing screws 31 which hold the plates 16 in place will be removed and the plates 16 can then be removed from the ends of the housin The blocks 28 will be carried outwardly with these plates and the housing will beleft open thus permitting the baille plate 22 and the head to be easily and quickly.

removed'. When the proper cleaning or repair has been made the device will be reas sembled and the plates 16 then ut back in place and secured. It will thus e seen that the suction box is so constructed that 1t can be easily and quickly taken apart and reassembled and further is so constructed that the suction through the same can be controlled.

What is claimed is: y

l. A suction box comprising a housing open at its upper end,\a head closing the upper end of the housing and provided with transversely extending slots converging toward the center of the housing, a suction pipe entering the bottom of the housing atv approximately the center thereof, ,a bafiie plate in the housing intermediate its height and having its end portions perforated and its central portion above the suction pipe unperforated, and head blocksv slidably mounted in the end portions of the housing. between the baffle plate and the head of the housing for closing the openings in the end portions of the plate and housing. A

2. A suction box comprising a housing having an outlet port in the intermediate portion of its bottom', ahead closing the upper end of the housing and provided with diagonal slots extending transversely of the head, a baiile plate in the housing having its end portions perforated and its central portion unperforated, and means in the end portions of the housing between the plate and head for selectively closing the openings in the end portions of the plate and head.

3. A suction box comprising a housing having a head provided with air inlet slots and having its bottom provided with an air mediate its height and having its end portions perforated and its central portion above the outlet portion unperforated.

4. A suction box comprising a housing having a bottomand 'side walls, a head for vthe housing provided with air passages and mounted between the side walls for longitudinal sliding movement, plates closing the ends of the housing, and adjusting means for the head carried by the plates and engaging the head for imparting longitudinal movement to the head and retaining the -head in a set position.

` 5. A suction box comprising a housing having an outlet port in its lower portion and having a head provided with inlet openings, and a perforated baille plate in the housing between the head and outlet'port, the portion of the bae plate directly above the outlet port being unperforated.

6. A suction box comprising a housing vhaving side walls, a head positioned between the s ide walls and provided with air inlet openings, runner strips carried by the side walls of the housing and fitting into grooves in the head to slidably mount the head, end l plates for the housing, and vset screws fitted through the end plates and engaging the ends of the head to adjust the position of the head and retainthe head in a set posiion.

7. A suction box comprising a housing having its bottom provided with an air outlet port, the head for the housing provided with air inlet openings, a baiie plate in the housing between the head and outlet port, the bathe plate being provided with air passages upon o posite sides of the outlet port, blocks for c osing certain of the openings of the head and baffle plate slidably mounted in the end' nmszivY 8. A suction box comprising a casing having an air outlet port, and a hed for the housing formed of sections extending transversely and having their side portions out 5 to provide air inlet slots when the sections are in contacting relation.

9. A suction box comprising a housing having an outlet port, a head having inlet openings, a suction equalizing plate in the housing between the head and outlet port, 10

land means adjustably mounted in the housing between the head and plate for selectively closing certain of the openings `of- GEORGE SHEPHERD JOHNSON.